JP5450140B2 - Noise removing circuit board and noise removing device - Google Patents

Description

  The present invention relates to a noise removal circuit board and a noise that can be used in common for a 200 V class three-phase three-wire AC power source mainly used in Japan and a 400 V class three-phase four-wire AC power source mainly used overseas. The present invention relates to a removing device.

  A general three-phase commercial AC power source used in Japan is a three-phase three-wire AC power source that has an R phase, an S phase, and a T phase, and outputs approximately 200 V as an interphase voltage. . In addition, there are 210V, 240V, etc. as 200V class three-phase commercial power supplies overseas.

  On the other hand, in commercial AC power supplies that are generally used overseas, R phase, S phase, and T phase (usually referred to as L1, L2, and L3 phases overseas, but for ease of explanation, Japan It uses the same name as a domestic three-phase commercial AC power source.) And a neutral point (N phase), and outputs approximately 400V as an interphase voltage for each of the R phase, S phase, and T phase. , S-phase, T-phase, and N-phase, there is a three-phase four-wire AC power source that outputs approximately 230 V as line voltages. The phase voltage of 3-phase 4-wire AC power supply is 400V in many countries, but there are 380V, 415V, 460V, etc. in some countries as 400V class 3-phase 4-wire AC power supply. To do.

  When connecting an electric device to these commercial AC power supplies, a noise removing device (noise filter) for preventing the outflow of noise from the electric device must be provided. For this reason, in the case of electrical equipment sold both domestically and overseas, a circuit for noise removal corresponding to a domestic three-phase three-wire AC power supply and a noise removal circuit corresponding to a three-phase four-wire AC power supply outside Japan Each of the circuits must be prepared.

  In addition, it has a circuit corresponding to a three-phase three-wire AC power supply and a circuit corresponding to a three-phase four-wire AC power supply, and is versatile so that both AC power supplies can be supported by switching the connection. An enhanced power supply device is known (for example, Patent Document 1).

JP-A-61-203824

  The above-mentioned known document does not describe a noise removal circuit, and this power supply apparatus eventually connects an input unit for connecting an overseas three-phase four-wire AC power supply and a three-phase three-wire AC power supply. This is provided with each of the input units, and this is a major factor causing an increase in cost.

  In consideration of the above circumstances, the present invention can deal with both a three-phase three-wire AC power source and a three-phase four-wire AC power source with a single circuit board, thereby reducing the cost. It is an object of the present invention to provide a removal circuit board and a noise removal apparatus using the noise removal circuit board.

  The circuit board for noise removal according to the present invention includes a common input terminal connected to a three-phase four-wire AC power source or a three-phase three-wire AC power source, a three-phase wiring pattern and a neutral point wiring electrically connected to the input terminal. A first capacitor connection portion that is provided between each of the three-phase wiring patterns and the neutral-point wiring pattern and is capable of inserting and connecting a capacitor; and one phase of the three-phase wiring pattern A short-circuit connecting portion that is provided between the wiring pattern and the neutral point wiring pattern and capable of inserting and connecting a short-circuit component; and a two-phase wiring portion that is not provided with the short-circuit connecting portion of the three-phase wiring pattern. And a second capacitor connecting portion provided between the wiring patterns and capable of inserting and connecting capacitors.

  The circuit board for noise elimination of this invention can respond to both a three-phase three-wire AC power source and a three-phase four-wire AC power source with one circuit board, and can reduce the cost. In addition, a noise removing device with reduced cost can be provided by using such a circuit board for noise removal.

The block diagram which shows the connection state to the three-phase four-wire type AC power supply of one Embodiment. The figure which shows the structure of the circuit board for the input side noise removal of the common circuit board of one Embodiment. The figure which shows the structure of the circuit board for the output side noise removal of the common circuit board of one Embodiment. The figure which shows the structure of the circuit for noise removal on the input side of FIG. 1, and the circuit for noise removal on the output side. The figure which shows the waveform at the time of the normal connection of the output voltage of the half-wave rectifier circuit in the output side noise removal circuit of one Embodiment. The figure which shows the waveform at the time of the phase loss of the output voltage of the half-wave rectifier circuit in the output side noise removal circuit of one Embodiment. The figure which shows the waveform at the time of incorrect wiring of the output voltage of the half-wave rectifier circuit in the output side noise removal circuit of one Embodiment. The block diagram which shows the connection state to the three-phase three-wire type AC power supply of one Embodiment. The figure which shows the structure of the circuit for the input side noise removal of FIG. 8, and the circuit for an output side noise removal.

[1] An embodiment of the present invention will be described below. First, the correspondence to a 400 V class three-phase four-wire AC power source, which is a commercial AC power source used outside of Japan, will be described.
In FIG. 1, 1 is a 400V class three-phase four-wire AC power supply having R phase, S phase, T phase, and neutral point, and outputs 400V AC as interphase voltage for each of R phase, S phase, and T phase. At the same time, AC 230V is output as the line voltage of each of the R phase, S phase, T phase and neutral point.

  Three-phase lines L1, L2, L3 and a neutral line N are connected to the R-phase, S-phase, T-phase and neutral point of the three-phase four-wire AC power source 1, and the three-phase lines L1, L2, L3 and The power supply terminals Tr, Ts, Tt and the neutral point terminal Tn of the input side noise removal circuit 2 are connected to the neutral line N. The ground terminal Te of the input side noise removing circuit 2 is grounded.

  Further, the line filter is disposed downstream of the connection position of the input side noise removal circuit 2 in the three-phase lines L1, L2, L3 and the neutral line N, that is, at a position subsequent to the input side noise removal circuit 2. 3 is connected. This line filter 3 has a plurality of inductors 3r, 3s, 3t, 3n inserted and connected to the three-phase lines L1, L2, L3 and the neutral line N, respectively.

  Further, the power supply terminal of the output-side noise removing circuit 4 is located downstream of the connection position of the line filter 3 in the three-phase lines L1, L2, L3 and the neutral line N, that is, at a position subsequent to the line filter 3. Tr, Ts, Tt and neutral point terminal Tn are connected. The ground terminal Te of the output side noise removing circuit 4 is grounded.

  The input-side noise removal circuit 2 includes at least a plurality of capacitors 24r, 24s, and 24t described later. The output side noise removing circuit 4 includes at least a plurality of capacitors 31r, 31s, 31t, 32r, 32s, and 32t, which will be described later. The capacitors of the input side noise removing circuit 2 and the output side noise removing circuit 4 and the inductors 3r, 3s, 3t, and 3n of the line filter 3 constitute a noise removing device.

  A 400 V load 100 in the electric device A is connected downstream of the connection position of the line filter 3 in the three-phase lines L1, L2, L3 and the neutral line N. For example, in the case of an air conditioner, the 400V system load 100 is an inverter, a compressor motor, or the like that is operated by a voltage between phases (three-phase AC voltage) 400V.

  The output-side noise removal circuit 4 is connected between any one of the three-phase lines L1, L2, and L3 and the neutral line N, and outputs one line voltage (single-phase AC voltage) 230V. Output terminals Out1, Out2 for output, output terminals Out3, Out4 for outputting a phase loss detection signal, and input terminals In1, In2 for capturing a relay drive signal. The 230V system load 200 in the electric device A is connected to the output terminals Out1 and Out2. For example, in the case of an air conditioner, the 230V system load 200 includes a fan motor, a control circuit 201, and the like, and operates with a line voltage 230V supplied from the output terminals Out1 and Out2. The control circuit 201 controls the operation of the fan motor of the 230V system load 200 and the inverter of the 400V system load 100, and outputs the supply / cutoff of the line voltage from the output terminals Out1 and Out2 to the 230V system load 200. Control is performed by supplying a relay drive signal to the side noise elimination circuit 4. The output terminal Out3, Out4 is connected to a phase loss alarm 5 for reporting the phase loss.

  On the other hand, a common circuit board 10 shown in FIGS. 2 and 3 is prepared as a circuit board for forming the input-side noise removal circuit 2 and the output-side noise removal circuit 4. The common circuit board 10 is used for simplifying manufacturing processes such as board formation and component mounting. The common circuit board 10 includes an input-side noise removal circuit board 11 for forming the input-side noise removal circuit 2 and an output-side noise removal circuit board 12 for forming the output-side noise removal circuit 4. It is integrated at the time of manufacture and can be divided thereafter. After the electronic components are completely mounted on both circuit boards 11 and 12, by cutting the groove 13 at the boundary position, the circuit board 11 for noise removal on the input side It can be divided into an output-side noise removal circuit board 12.

  The input-side noise removal circuit board 11 includes the input-side noise removal circuit 2 for the three-phase four-wire AC power source 1 and the input-side noise for the 200 V class three-phase three-wire AC power source 9 shown in FIG. It has a conductive pattern (wiring pattern) suitable for both of the removal circuit 6, and the input-side noise removal circuit 2 and the input-side noise removal depending on the connection position of each capacitor and other electrical parts to the conductive pattern Either one of the circuits 6 can be selectively formed. The output-side noise removal circuit board 12 includes the output-side noise removal circuit 4 for the three-phase four-wire AC power source 1 and the output-side noise for the 200 V class three-phase three-wire AC power source 9 shown in FIG. It has a conductive pattern (wiring pattern) suitable for both of the removal circuit 7, and the output-side noise removal circuit 4 and the output-side noise removal depending on the connection position of each capacitor and other electrical parts to the conductive pattern Either one of the circuits 7 can be selectively formed.

  First, the input-side noise removal circuit board 11 will be described. As shown in FIG. 2, conduction holes hi11, hi12, hi13 and a neutral point terminal Tn can be inserted and connected on the input-side noise removal circuit board 11 so that the power supply terminals Tr, Ts and Tt can be inserted and connected. A conduction hole hi15 capable of inserting and connecting the conduction hole hi14 and the ground terminal Te is formed. On the input-side noise removal circuit board 11, three-phase conductive patterns (also referred to as three-phase wiring patterns) L1p, L2p, and L3p that are conductive with the conduction holes hi11, hi12, hi13 and the three-phase lines L1, L2, and L3 are provided. Is formed. Further, a conductive hole hi14 and a neutral point conductive pattern (also referred to as a neutral point wiring pattern) Np connected to the conductive hole hi14 and connected to the neutral line N are formed on the circuit board 11 for noise removal on the input side. Yes. Furthermore, a conductive hole hi15 and a ground conductive pattern Ep connected to the ground line E and connected to the ground line E are formed on the circuit board 11 for noise removal on the input side. These conductive patterns are formed of copper foil or the like. Each conduction hole is a through hole provided in the copper foil. Each conduction hole is formed so that the foot terminal of each element inserted into the hole is electrically connected to a predetermined conductive pattern, but if the element itself is an overlaid type, it is not a hole, A land for soldering may be used.

  Conductive holes h11, h12, and conductive holes, which can be connected in series with fuses 21r, 21s, and 21t, which will be described later, are formed on the three-phase conductive patterns L1p, L2p, and L3p in the vicinity of the conductive holes hi11, hi12, and hi13. h21 and h22 and conduction holes h31 and h32 are formed, respectively. Between the three-phase conductive patterns L1p, L2p, L3p on the downstream side of these conduction holes and the neutral point conductive pattern Np, surge protection devices 22r, 22s, 22t such as varistors to be described later for voltage surge suppression are inserted and connected. Conductive holes hs11 and hs12, conductive holes hs21 and hs22, and conductive holes hs31 and hs32, which are possible first surge absorbing element connecting portions, are formed, respectively. That is, the conduction holes hs11, hs21, and hs31 are electrically connected to the three-phase conductive patterns L1p, L2p, and L3p, and the conduction holes hs12, hs22, and hs32 are electrically connected to the neutral point conductive pattern Np.

  Although not used in the 400V class three-phase four-wire AC power supply 1, a second surge capable of inserting and connecting a surge absorbing element 22rs used in the case of the 200V class three-phase three-wire AC power supply 9 shown in FIG. Conductive holes hs41 and hs42, which are absorption element connecting portions, are provided between the R-phase conductive pattern L1p and the S-phase conductive pattern L2p.

  Between the earth conductive pattern Ep and the neutral point conductive pattern Np, conduction holes hs51 and hs52 and a conduction hole hg11 capable of inserting and connecting a surge protection device 22n to be described later and a gas-filled discharge tube 23 for lightning surge protection in series. , Hg12.

  Subsequently, a connection portion of a capacitor, which is a main element constituting a noise removal filter circuit, will be described. Capacitors 24r, 24s, and 24t, which will be described later, can be inserted and connected between the three-phase conductive patterns L1p, L2p, and L3p downstream of the respective conductive holes for the fuses 21r, 21s, and 21t and the neutral point conductive pattern Np. Conductive holes hc11 and hc12, conductive holes hc21 and hc22, and conductive holes hc31 and hc32, which are first capacitor connecting portions, are formed. That is, the conduction holes hc11, hc21, hc31 are electrically connected to the three-phase conductive patterns L1p, L2p, L3p, and the conduction holes hc12, hc22, hc32 are electrically connected to the neutral point conductive pattern Np.

  A second capacitor connection portion that is not used in the 400 V class three-phase four-wire AC power source 1 but is capable of inserting and connecting a capacitor 24 rs used in the case of the 200 V class three-phase three-wire AC power source 9 shown in FIG. Conductive holes hc41 and hc42 are formed between the R-phase conductive pattern L1p and the S-phase conductive pattern L2p. Similarly, in the case of the 200V class three-phase three-wire AC power supply 9, it is a short-circuit component between the T-phase conductive pattern L3p, which is one of the three-phase conductive patterns L1p, L2p, and L3p, and the neutral point conductive pattern Np. Conduction holes hh11 and hh12, which are short-circuit connection portions capable of inserting and connecting jumper wires 25 described later, are formed.

  In this embodiment, the T-phase conductive pattern L3p of the three-phase conductive patterns L1p, L2p, and L3p and the neutral point conductive pattern Np are short-circuited by the jumper wire 25. Not only the pattern L3p but also a configuration in which the jumper wire 25 shorts between the R-phase conductive pattern L1p and the neutral point conductive pattern Np or between the S-phase conductive pattern L2p and the neutral point conductive pattern Np. When short-circuiting between the R-phase conductive pattern L1p and the neutral point conductive pattern Np, the conduction holes hh11 and hh12 are formed between the R-phase conductive pattern L1p and the neutral point conductive pattern Np. When short-circuiting between the S-phase conductive pattern L2p and the neutral point conductive pattern Np, the conduction holes hh11 and hh12 are formed between the S-phase conductive pattern L2p and the neutral point conductive pattern Np.

  That is, the circuit board 11 for noise removal on the input side is provided between the wiring patterns L1p, L2p, L3p of the three-phase wiring pattern and the neutral wiring pattern Np, and is a first capacitor connection capable of inserting and connecting a capacitor. And a short-circuit connecting portion that is provided between the one-phase wiring pattern among the three-phase wiring patterns L1p, L2p, and L3p and the neutral-point wiring pattern Np, and is capable of inserting and connecting a short-circuiting component, and a three-phase wiring Among the patterns, there is provided a second capacitor connection portion that is provided between two-phase wiring patterns that are not provided with a short-circuit connection portion and that allows capacitor insertion connection.

  As shown in FIG. 4, power supply terminals Tr, Ts, Tt, a neutral point terminal Tn, and a ground terminal Te are mounted in each conduction hole in the input-side noise removal circuit board 11, and a predetermined circuit forming circuit is formed. The fuses 21r, 21s, and 21t, the surge protection devices 22r, 22s, 22t, and 22n, the gas discharge tube 23 for lightning surge protection, and the capacitors 24r, 24s, and 24t, respectively, are mounted. That is, both terminals of fuses 21r, 21s, and 21t are inserted into the conduction holes h11 and h12, the conduction holes h21 and h22, and the conduction holes h31 and h32, respectively. The surge protection devices 22r, 22s, and 22t are inserted between the conduction holes hs11 and hs12, the conduction holes hs21 and hs22, and the conduction holes hs31 and hs32, respectively. The surge protection device 22n is inserted into the conduction holes hs51 and hs52, and the gas-filled discharge tube 23 for lightning surge protection is inserted into the conduction holes hg11 and hg12.

  With this mounting, the input-side noise removal circuit 2 for a 400V class three-phase four-wire AC power supply is formed. In particular, surge protection devices 22r, 22s, and 22t connected between the three-phase conductive patterns L1p, L2p, and L3p and the neutral point conductive pattern Np enable protection from surges. The surge protection device 22n connected between the ground conductive pattern Ep and the neutral point conductive pattern Np and the series circuit of the gas-filled discharge tube 23 can also protect against surges such as lightning.

  In addition, in the case of the 200V class three-phase three-wire AC power supply 9 shown in FIG. 9 described later, conduction holes hs41 and hs42 that can be inserted and connected to the surge absorbing element 22rs used in the case of the 200V class three-wire AC power supply 9 and Parts are mounted on certain conduction holes hc41, hc42 and conduction holes hh11, hh12 in which the jumper wire 25, which is a short-circuiting part, can be inserted and connected between the T-phase conductive pattern L3p and the neutral point conductive pattern Np. The open state is maintained without any problems.

  On the other hand, as shown in FIG. 3, conduction holes hj11, hj12, hj13 capable of inserting and connecting the power supply terminals Tr, Ts, Tt, and the neutral point terminal Tn are inserted on the circuit board 12 for noise removal on the output side. A possible conduction hole hj14 and a conduction hole hj15 into which the ground terminal Te can be inserted and connected are formed. On the output-side noise removal circuit board 12, three-phase conductive patterns L1p, L2p, and L3p that are electrically connected to the conduction holes hj11, hj12, and hj13 and the three-phase lines L1, L2, and L3 are formed. A neutral point conductive pattern Np that is electrically connected to the conduction hole hj14 and the neutral line N is formed. An earth conductive pattern Ep is formed which is electrically connected to the conduction hole hj15 and the earth line E. These conductive patterns are formed of copper foil or the like. Each terminal is a through hole provided in the copper foil.

  Capacitor connection portions in which capacitors 31r, 31s, and 31t described later can be inserted and connected between the three-phase conductive patterns L1p, L2p, and L3p and the neutral point conductive pattern Np in the output-side noise removal circuit board 12. Conduction holes hc51 and hc52, conduction holes hc61 and hc62, and conduction holes hc71 and hc72 are formed, respectively. That is, the conduction holes hc51, hc61, hc71 are electrically connected to the three-phase conductive patterns L1p, L2p, L3p, and the conduction holes hc52, hc62, hc72 are electrically connected to the neutral point conductive pattern Np.

  Conductive holes hc81 and hc82, which are second capacitor connecting portions capable of inserting and connecting capacitors 31rs used in the case of a 200V class three-phase three-wire AC power source 9 described later shown in FIG. 9 described later, are formed in an R-phase conductive pattern L1p. And S-phase conductive pattern L2p.

  Conductive holes hc111, hc112, and conductive holes hc121, which are first capacitor connecting portions in which capacitors 32r, 32s, and 32t described later can be inserted and connected between the three-phase conductive patterns L1p, L2p, and L3p and the ground conductive pattern Ep. , Hc122, and conduction holes hc131, hc132, respectively. That is, the conduction holes hc111, hc121, hc131 are electrically connected to the three-phase conductive patterns L1p, L2p, L3p, and the conduction holes hc112, hc122, hc132 are electrically connected to the ground conductive pattern Ep.

  Conductive holes hh21 and hh22 which are connection portions for energization capable of inserting and connecting a jumper wire 33b which is a short-circuit component used in the case of a 200V class three-phase three-wire AC power source 9 shown in FIG. It is formed between pattern L3p and neutral point conductive pattern Np. That is, the conduction hole hh21 is electrically connected to the T-phase conductive pattern L3p, and the conduction hole hh22 is electrically connected to the neutral point conductive pattern Np. And the conduction hole which is a connection part for electricity supply which can insert and connect the below-mentioned jumper wire 33a which is an electricity supply component on the neutral point conductive pattern Np downstream from the conduction hole hh22 and the conduction holes hc52, hc62 and hc72. hh31 and hh32 are formed.

  The R-phase conductive pattern L1p extends from the conduction hole hj11 for the power supply terminal Tr to a position corresponding to the output terminal Out1. A conductive hole ho11 in which the output terminal Out1 can be inserted and connected is formed at a position corresponding to the output terminal Out1 in the R-phase conductive pattern L1p.

  Conductive holes hd11, hd12, and conductive holes hd21, to which diodes 34r, 34s, and 34t (to be described later) serving as conductive paths of the three-phase conductive patterns L1p, L2p, and L3p can be inserted and connected to the three-phase conductive patterns L1p, L2p, and L3p. hd22 and conduction holes hd31 and hd32 are formed, respectively. The three-phase conductive patterns L1p, L2p, and L3p on the downstream side of these conduction holes are collected into one conductive pattern Lp, and a resistor 35 to be described later for forming a current path and a light emitting diode of the photocoupler 40 are formed on the conductive pattern Lp. Conductive holes hr11 and hr12 and conductive holes hp11 and hp12 for inserting and connecting 40a are formed. A conductive pattern Lp1 is formed at a position between the conductive holes hr11, hr12 and the conductive holes hp11, hp12 in the conductive pattern Lp, and is downstream of the conductive patterns Lp1 and the conductive holes hh31, hh32 in the neutral point conductive pattern Np. Are formed through holes hx11 and hx12 into which an input terminal of an erroneous wiring detection circuit 36 described later can be inserted and connected. A conduction hole hx13 into which the output terminal of the erroneous wiring detection circuit 36 can be inserted and connected is formed in the vicinity of the conduction holes hx11 and hx12, and a base terminal of a transistor (IGBT) 39 to be described later is formed in the vicinity of the conduction hole hx13. A conduction hole ht13 that can be inserted and connected is formed. A conductive pattern Lp2 is formed between the conduction hole hx13 and the conduction hole ht13.

  The neutral point conductive pattern Np is extended from the conduction hole hj14 for the neutral point terminal Tn to a position corresponding to the output terminal Out2, and a conduction hole ho12 capable of inserting and connecting the output terminal Out2 is formed at the corresponding position. Yes. On the neutral point conductive pattern Np in the vicinity of the conduction hole ho12, conduction holes hn11 and hn12 capable of inserting and connecting a normally-open contact 41a of a relay 41 (described later) for forming a conduction path are formed. A neutral point conductive pattern Np1 is formed in parallel with the conduction holes hn11 and hn12. On the neutral point conductive pattern Np1, a thermistor 37 for preventing inrush current, a diode 38 for forming a current path, Conductive holes hm11 and hm12, conductive holes hd71 and hd72, and conductive holes ht11 and ht12 that can be inserted and connected between the collector terminal and the emitter terminal of the transistor 39 for forming an electric circuit are formed. Further, a neutral point conductive pattern Np2 is formed in parallel with the conduction holes hd71, hd72 and the conduction holes ht11, ht12, and a jumper wire 52, which is a short-circuit component of FIG. 9 to be described later, is formed on the neutral point conductive pattern Np2. Conductive holes hh41 and hh42 that can be inserted and connected are formed.

  Conductive holes hn13 and hn14 are formed in the vicinity of the hn11 and hn12 so that an exciting coil 41c of the relay 41 described later can be inserted and connected, and the input terminals In1 and In2 can be inserted and connected in the vicinity of the hn13 and hn14. Conductive holes hi11 and hi12 are formed. Conductive patterns Lp3, Lp4 are respectively formed between the conductive holes hn13, hn14 and the conductive holes hi11, hi12, and a back electromotive force preventing diode 42 to be described later is inserted and connected between the conductive patterns Lp3, Lp4. Conductive holes hd71 and hd72 are formed.

  Conductive holes hp21 and hp22 for inserting and connecting a phototransistor 40b of the photocoupler 40 described later are formed at positions facing the conductive holes hp11 and hp12 for the light emitting diode 40a, and the output terminal Out3 is formed from the conductive holes hp21 and hp22. , Out4, conductive patterns Lp5 and Lp6 are formed. Conductive holes ha21 and ha22 that can be inserted and connected to the output terminals Out3 and Out4 are formed at positions corresponding to the output terminals Out3 and Out4 on the conductive patterns Lp5 and Lp6.

  Further, upstream of the conduction holes hd12, hd22, hd32 for the diodes 34r, 34s, 34t in the three-phase conductive patterns L1p, L2p, L3p, and from the conduction holes hh31, hh32 for the jumper line 33a in the neutral point conductive pattern Np. Conductive holes hd41, hd42, and conductive holes hd51, hd52 that can be inserted and connected between the downstream side and diodes 51r, 51s, 51t used in the case of a 200 V class three-phase three-wire AC power source 9 shown in FIG. The conduction holes hd61 and hd62 are respectively formed.

  As shown in FIG. 4, power supply terminals Tr, Ts, Tt, neutral point terminal Tn, ground terminal Te, output terminals Out1, Out2, output terminals Out3, and the like are formed in the respective conduction holes in the output-side noise removal circuit board 12. Out4, input terminals In1 and In2 are mounted, and capacitors 31r, 31s, and 31t, capacitors 32r, 32s, and 32t, jumper wires 33a, diodes 34r, 34s, and 34t, and resistors 35, which are predetermined elements for forming a circuit. , Miswiring detection circuit 36, thermistor 37 for preventing inrush current, diode 38, transistor (IGBT) 39, light emitting diode 40a and phototransistor 40b of photocoupler 40, normally open contact 41a and exciting coil 41c of relay 41, back electromotive force Power prevention diodes 42 are mounted in the corresponding conduction holes, respectively.

  By this mounting, the output side noise removal circuit 4 for the 400 V class three-phase four-wire AC power supply is formed.

  The diodes 34r, 34s, and 34t constitute a half-wave rectifier circuit. The miswiring detection circuit 36 monitors the level of the input voltage between the conductive pattern Lp and the neutral point conductive pattern Np, so that the three-phase lines L1, L2, L3 and the middle The miswiring of the sexual line N is detected.

  By mounting and soldering necessary components in this way, the input side noise removing circuit 2 and the output side noise removing circuit 4 are formed on the common circuit board 10, and the input side noise removing circuit 2 and the output side noise are formed. The removal circuit 4 is divided by cutting the groove 13. A line filter 3 is externally connected between the divided input-side noise removal circuit 2 and output-side noise removal circuit 4.

Here, the operation of the miswiring detection circuit 36 will be described with reference to FIGS. 5, 6, and 7. FIG.
(1) During normal connection
As shown in FIG. 1, when the three-phase lines L1, L2, L3 and the neutral line N are correctly wired to the R, S, T-phase and neutral point of the three-phase four-wire AC power source 1, A half-wave rectified voltage of 230 V indicated by a solid line in FIG. 5 is output from the half-wave rectifier circuit of the diodes 34 r, 34 s, 34 t, and is input to the miswiring detection circuit 36. This input voltage is within a predetermined appropriate range. At this time, the miswiring detection circuit 36 has a wiring connection to the three-phase four-wire AC power supply 1 because the input voltage is within the proper range. It is determined that there is no error, and an ON signal is output. The transistor 39 is turned on by this ON signal, and the line voltage 230V between the R-phase line L1 and the neutral line N is output from the output terminals Out1 and Out2 through the inrush current preventing thermistor 37 and the diode 38. . The 230V system load 200 is operated by this output voltage, and a relay drive signal is output from the control circuit 201 of the 230V system load 200 to the input terminals In1 and In2 of the output side noise elimination circuit 4. By this relay drive signal, the relay 41 of the output side noise removing circuit 4 is energized, and the normally open contact 41a is closed. When the normally open contact 41a is closed, the line voltage 230V between the R-phase line L1 and the neutral line N is output from the output terminals Out1 and Out2 via the normally open contact 41a without passing through the thermistor 37 and the diode 38. Is done. The operation of the 230V system load 200 is continued by this output voltage, and the 400V system load 100 is driven and controlled by the control circuit 201.

(2) During phase failure
Even if the three-phase lines L1, L2, L3 and the neutral line N are correctly connected to the R, S, T-phase and neutral point of the three-phase four-wire AC power supply 1, the three-phase four-wire AC An open phase may occur in any of the R phase, S phase, and T phase of the power supply 1. For example, when a phase failure occurs in the T phase of the three-phase four-wire AC power supply 1, the interphase voltage between the S phase line T2 and the T phase line T3 and between the R phase line T1 and the T phase line T3 is zero. V. In this case, proper operation of the 400V system load 100 becomes difficult.

  At the time of this phase loss, as shown by a broken line in FIG. 6, a half-wave rectified voltage that fluctuates from 230 V to zero V is output from the half-wave rectifier circuit of the diodes 34r, 34s, and 34t. Input to the coupler 40. At this time, the miswiring detection circuit 36 determines that a phase loss has occurred because the input voltage drops to zero V outside the appropriate range, and outputs an OFF signal. The transistor 39 maintains an off state by this off signal, and the line voltage 230V between the R-phase line L1 and the neutral line N is not output from the output terminals Out1 and Out2. Therefore, the 230V system load 200 does not operate, and unnecessary drive control for the 400V system load 100 is prevented.

  At this time, the photocoupler 40 is turned on and off by a half-wave rectified voltage that varies from 230 V to zero V. This on / off signal is supplied to the phase loss alarm 5 via the output terminals Out3 and Out4. The phase loss alarm 5 monitors the zero V period from the on / off signal, determines that a phase loss has occurred if the zero V period is an electrical angle of 60 degrees, and notifies the fact by light or sound.

(3) Incorrect wiring
When the three-phase lines L1, L2, L3 and the neutral line N are not correctly connected to the R, S, T phase and neutral point of the three-phase four-wire AC power source 1, for example, neutral to the T phase When the line N is wired and the T-phase line T3 is wired at the neutral point, between the S-phase line L2 and the T-phase line L3 and between the R-phase line L1 and the T-phase line L3 As a result, a line voltage 230V lower than the original interphase voltage 400V is generated, and an interphase voltage 400V higher than the original line voltage 230V is generated between the R-phase line T1 and the neutral line N.

  In this case, as indicated by a solid line in FIG. 7, a half-wave rectified voltage that changes in level from 400 V to zero V is output from the half-wave rectifier circuit of the diodes 34 r, 34 s, 34 t, and is input to the miswiring detection circuit 36. The

  At this time, the erroneous wiring detection circuit 36 determines that the wiring connection to the three-phase four-wire AC power supply 1 is incorrect because the input voltage changes between an excessive level outside the appropriate range and the zero level. , Outputs an off signal. The transistor 39 is kept off by this off signal. Therefore, the excessive interphase voltage 400V between the R phase line T1 and the neutral line N is not supplied to the 230V system load 200, and the safety of the 230V system load 200 is ensured.

  [2] The correspondence to the 200V class three-phase three-wire AC power supply will be described. Of course, the same circuit board as that of the three-phase four-wire AC power source 1 shown in FIG. 2 is used.

  In FIG. 9, a 200V class three-phase three-wire AC power supply 9 outputs AC 200V as an interphase voltage for each of the R phase, S phase, and T phase. Three-phase lines L1, L2, and L3 are connected to the R-phase, S-phase, and T-phase of the 200V class three-phase three-wire AC power supply 9, and the input-side noise removing circuit 6 is connected to the three-phase lines L1, L2, and L3. Power supply terminals Tr, Ts, Tt are connected. The ground terminal Te of the input side noise removing circuit 6 is grounded.

  Inductors 3r, 3s, and 3t of the line filter 3 are inserted and connected downstream of the connection position of the input-side noise removal circuit 6 in the three-phase lines L1, L2, and L3. The inductor 3n is not used or a three-phase inductor without the inductor 3n is used. Further, the power supply terminals Tr, Ts, Tt of the output-side noise removal circuit 4 are connected to the downstream side of the connection position of the line filter 3 in the three-phase lines L1, L2, L3. The ground terminal Te of the output side noise removing circuit 4 is grounded.

  The input-side noise removal circuit 6 includes at least a plurality of capacitors 24rs, 24s, and 24r described later. The capacitor 24rs is connected between the conduction holes hc41 and hc42, and is inserted between the R phase and the S phase. The capacitor 24s is connected between the conduction holes hc21 and hc22, and is inserted between the S phase and the neutral line N. The capacitor 24r is connected between the conduction holes hc11 and hc12 and is inserted between the R phase and the neutral line N. Here, in the case of the 200 V class three-phase three-wire AC power source 9, the neutral line N is not connected to the power source side, and the short-circuit jumper wire 25 is inserted in the conduction holes hh11 and hh12. For this reason, the neutral line N is electrically connected to the three-phase line L3 which is a T-phase line by the jumper line 25. Therefore, the capacitor 24s is inserted between the S phase and the T phase. Similarly, the capacitor 24r is inserted between the R phase and the T phase. As a result, the capacitors 24rs, 24s, and 24r are respectively connected between the three phases, and an interphase capacitor that is a part of the noise filter can be configured.

  That is, in the case of the 400 V class three-phase four-wire AC power source 1 described above, the noise filter capacitors 24r, 24t, and 24s are connected between the three-phase lines L1, L2, and L3 and the neutral line N, and the capacitor 24r. , 24t, 24s are star-connected via a neutral line N. On the other hand, in the case of the 200V class three-phase three-wire AC power source 9, noise filter capacitors 24r, 24s, and 24rs are connected between the three-phase lines L1, L2, and L3 to form a Δ connection.

  Here, the capacitors 24r, 24t, and 24s used in the 400V class three-phase four-wire AC power source 1 are applied with the line voltage 230V between the neutral line N and each phase, and therefore the phase voltage is 400V. This is advantageous in that the capacitor used has a lower rating than the case of Δ connection. The capacitors 24r, 24t, and 24s used in the 400V class three-phase four-wire AC power supply 1 are capacitors having a higher rating than the capacitors 24r, 24s, and 24rs used in the 200V class three-phase three-wire AC power supply 9. There is a need. At this time, since the conduction holes into which the capacitors are inserted are the same, it is necessary to select the same connection terminals even if the widths of the connection terminals to the substrate of the capacitors are different.

  Similarly, the output-side noise removal circuit 7 includes at least a plurality of capacitors 31r, 31rs, 31s, 32r, 32s, and 32t described later. These capacitors and the inductors 3r, 3s, 3t of the line filter 3 constitute a noise removing device.

  The capacitor 31r is connected between the conduction holes hc51 and hc52 and is inserted between the R phase and the neutral line N. Capacitor 31rs is connected between conduction holes hc81 and hc82, and is inserted between the S phase and the R phase. The capacitor 31s is connected between the conduction holes hc61 and hc62, and is inserted between the S phase and the neutral line N. Here, in the case of the 200V class three-phase three-wire AC power source 9, the neutral line N is not connected to the power source side, and the short-circuit jumper wire 33b is inserted into the conduction holes hh21 and hh22. For this reason, the neutral line N is electrically connected to the three-phase line L3, which is a T-phase line, by the jumper line 33b. Therefore, the capacitor 31s is inserted between the S phase and the T phase. Similarly, the capacitor 31r is inserted between the R phase and the T phase. As a result, each of the capacitors 31r, 31rs, 31s is connected between the three phases, and an interphase capacitor that is a part of the noise filter can be configured. In the output-side noise removal circuit 7 as well as the input-side noise removal circuit 6, in the case of the above-described 400V class three-phase four-wire AC power supply 1, the noise filter capacitors 31r, 31rs, 31s are neutral lines. Star connection via N. On the other hand, in the case of the 200V class three-phase three-wire AC power source 9, noise filter capacitors 31r, 31rs, and 31s are connected between the three-phase lines L1, L2, and L3 to form a Δ connection.

  And 200V type | system | group load 300 in the electric equipment B is connected downstream from the connection position of the line filter 3 in the three-phase lines L1, L2, and L3. This 200V system load 300 has an inverter, a compressor motor, etc. which operate | move by each phase voltage (three-phase alternating voltage) 200V.

  The output-side noise removal circuit 7 includes output terminals Out1 and Out2 for outputting one interphase voltage (single-phase AC voltage) 200V, output terminals Out3 and Out4 for outputting an open phase detection signal, and relay driving. It has input terminals In1 and In2 for capturing signals. The 100V system load 400 in the electric device B is connected to the output terminals Out1 and Out2. This 100V system load 400 includes a fan motor, a control circuit 401, and the like, and operates with an interphase voltage of 200V supplied from the output terminals Out1 and Out2 of the output side noise removal circuit 7. The control circuit 401 controls the operation of the fan motor of the 100V system load 400 and the inverter of the 200V system load 300, and supplies the interphase voltage from the output terminals Out1 and Out2 to the 100V system load 400 for output side noise removal. Control is performed by supplying a relay drive signal to the circuit 7. The output terminal Out3, Out4 is connected to a phase loss alarm 5 for reporting the phase loss.

  The input-side noise removal circuit 6 and the output-side noise removal circuit 7 are used for removing the input-side noise of the common circuit board 10 shown in FIGS. It is formed by mounting each capacitor and electric component in each conduction hole of the circuit board 11 and the circuit board 12 for noise removal on the output side.

  That is, as shown in FIG. 9, the input-side noise removal circuit 6 is different from the input-side noise removal circuit 2 of FIG. 4 in that the neutral point terminal Tn is unnecessary, and the surge protection device 22t is a T-phase line. The capacitor 24t is not connected between the T-phase line L3 and the neutral line N but between the R-phase line L1 and the S-phase line L2, and not between the L3 and the neutral line N. Is connected between the T-phase line L3 and the neutral line N by the connection of the jumper line 25.

  The difference between the output-side noise removal circuit 7 and the output-side noise removal circuit 4 in FIG. 4 is that the neutral point terminal Tn is not necessary and that the capacitor 31t is not between the T-phase line L3 and the neutral line N. Connected between the R-phase line L1 and the S-phase line L2, connected between the T-phase line L3 and the neutral line N by the connection of the jumper wire 33, and connected to the three-phase lines L1, L2, and L3. The diodes 51r, 51s, 51t are connected to the conductive line N, the miswiring detection circuit 36 is unnecessary, the transistor 39 is unnecessary, and the series circuit of the thermistor 37 and the jumper line 52 is always connected to the relay 41. It is to be connected in parallel to the open contact 41a. The diodes 51r, 51s, and 51t constitute a full-wave rectifier circuit together with the diodes 34r, 34s, and 34t.

  Thus, the input side noise removing circuit 6 and the output side noise removing circuit 7 are formed on the common circuit board 10, and the input side noise removing circuit 6 and the output side noise removing circuit 7 are divided by cutting the groove 13. Is done. The line filter 3 is externally connected between the divided input side noise removing circuit 6 and output side noise removing circuit 7.

  Other configurations are the same as those of the input-side noise removal circuit 2 and the output-side noise removal circuit 4. Therefore, the description is omitted.

[3] Summary
As described above, the input-side noise removing circuit 2 and the output-side noise removing circuit 4 suitable for the 400 V class three-phase four-wire AC power source 1 and the input side suitable for the 200 V class three-phase three-wire AC power source 9 By adopting a configuration in which components for mounting the noise removal circuit 6 and the output side noise removal circuit 7 on one common circuit board 10 are selected, a single common circuit board 10 is used to provide a 400V class three-phase four-wire AC power supply. Both 1 and 200 V class three-phase three-wire AC power supply 9 can be supported. As a result, the types and number of circuit boards can be reduced, and the cost can be reduced.

  Further, the input-side noise removal circuits 2 and 6 and the output-side noise removal circuits 4 and 7 formed on the common circuit board 10 are divided by cutting the groove 13, and the divided input-side noise removal circuits 2 and 2 are divided. Since the line filter 3 is externally connected between the circuit 6 and the output side noise removing circuits 4 and 7, the inductance of the line filter 3 with respect to the input side noise removing circuits 2 and 6 and the output side noise removing circuits 4 and 7 The influence of can be reduced.

In the above embodiment, the conduction holes hh11 and hh12 for the jumper wire 25 that are the short-circuit connection portions of the input-side noise removal circuit board 11 are the conduction holes hc31 for the capacitor 24t that are the first capacitor connection portions. , Hc32 can also be used. In the case of the 400V class three-phase four-wire AC power source 1, since the jumper wire 25 is unnecessary, the conduction holes hh11 and hh12 are not used, while the 200V class three-phase three-wire AC power source 9 is used. Since the capacitor 24t is not necessary, the conduction holes hc31 and hc32 are not used at the same time, so that the conduction holes hh11 and hh12 and the conduction holes hc31 and hc32 are both connected to the T-phase line L3. By being provided between the neutral line N. As a result, either the conduction holes hh11, hh12 or the conduction holes hc31, hc32 are not required, and the configuration can be simplified.
In addition, the present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine the component covering different embodiment suitably.

  DESCRIPTION OF SYMBOLS 1 ... 400V class 3 phase 4 wire type AC power supply, 2 ... Input side noise removal circuit, 3 ... Line filter, 3r, 3s, 3t, 3n ... Inductor, 4 ... Output side noise removal circuit, L1, L2, L3 ... 3 phase line, N ... neutral line, 9 ... 200V class 3-phase 4-wire AC power supply, 10 ... common resonant circuit, 11 ... input side noise removing circuit board, 12 ... output side noise removing circuit board, 13 ... Groove, Tr, Ts, Tt ... Power supply terminal, Tn ... Neutral point power supply terminal, Te ... Ground terminal, Out1, Out2 ... Output terminal, Out3, Out4 ... Output terminal, In1, In2 ... Input terminal, hc111, hc112 ... Conduction hole (first capacitor connection part), hc121, hc122... Conduction hole (first capacitor connection part), hc131, hc132 ... conduction hole (first capacitor connection part), hc81, hc 2 ... conduction hole (second capacitor connection part), hh11, hh12 ... conduction hole (short-circuit connection part), 24r, 24s, 24t ... capacitor, 31r, 31s, 31t ... capacitor, 36 ... miswiring detection circuit, 40 ... Photocoupler (phase loss detector), 41 ... Relay, 100 ... 400V load, 200 ... 230V load, 300 ... 200V load, 400 ... 100V load

Claims (5)

A common input terminal connected to a three-phase four-wire AC power source or a three-phase three-wire AC power source, a three-phase wiring pattern and a neutral point wiring pattern electrically connected to the input terminal, and each of the three-phase wiring patterns A first capacitor connecting portion provided between the wiring pattern and the neutral point wiring pattern and capable of inserting and connecting a capacitor; a one-phase wiring pattern of the three-phase wiring patterns; and the neutral point wiring pattern; A short-circuit connection portion that can be inserted and connected between the short-circuit components and a two-phase wiring pattern that is not provided with the short-circuit connection portion of the three-phase wiring patterns, and a capacitor A circuit board for noise removal, comprising: a second capacitor connecting portion capable of inserting and connecting. The circuit board for noise removal according to claim 1, wherein the short-circuit connection portion is also used as the first capacitor connection portion. A first surge absorbing element connecting portion provided between the three-phase wiring pattern and the neutral point wiring pattern and capable of inserting and connecting a surge absorbing element; and the short-circuit connecting portion of the three-phase wiring pattern. 3. The noise according to claim 1, further comprising: a second surge absorbing element connecting portion provided between the two-phase wiring patterns not provided and capable of inserting and connecting the surge absorbing element. 4. Circuit board for removal. The circuit board for noise removal according to any one of claims 1 to 3, connected to a three-phase four-wire AC power source or a three-phase three-wire AC power source;
A line filter having a plurality of inductors and connected to the three-phase four-wire AC power source or the three-phase three-wire AC power source at a position subsequent to the circuit board for noise removal;
An output side noise removing circuit having at least a plurality of capacitors and connected to the three-phase four-wire AC power source or the three-phase three-wire AC power source at a position subsequent to the line filter;
A noise removing apparatus comprising: When the output-side noise removing circuit is formed for the three-phase four-wire AC power supply, an erroneous wiring detection circuit that detects an erroneous wiring to the three-phase four-wire AC power supply, and the three-phase four When a phase loss detector for detecting a phase loss of a linear AC power supply is provided and formed for the three-phase three-wire AC power source, the phase loss of the three-phase three-wire AC power source is detected. The noise removal device according to claim 4, further comprising a phase loss detector for detecting the noise.

Images