JPH0343733B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive circuit for a polarized relay for remotely controlling lighting in hotels, offices, general homes, etc.

Conventionally, as a circuit for remotely controlling lighting, a circuit shown in FIG. 1 is generally used as an example of using a manual switch. That is, the coil B of the polarized relay A, the auxiliary contact C which has a pair of diodes D ₁ and D ₂ connected in antiparallel to the fixed contacts a and b of this polarized relay A, and the fixed contacts a ₀ and b ₀ A pair of diodes D ₃ and D ₄ in antiparallel
This is a circuit in which a manual push button switch D connected to an AC power source E is connected in series. Here F is a permanent magnet,
G is an output contact. In this circuit, manual pushbutton switch D and polarized relay A are connected using electric wires 1 ₁ and 1 ₂ , so remote control is possible, but if you want to drive the polarized relay by other electrical signals instead of manual operation. is inappropriate. Therefore, a circuit as shown in FIG. 2 is used. That is, instead of the manual operation switch D, a series circuit is made of a polarized relay reversal direction setting switch H and a polarized relay drive switch J, and the switches H and J1 are closed or opened by electromagnetic relays R ₁₁ and R ₂₁ , respectively. It is something. Therefore, since the electromagnetic relays R ₁₁ and RD ₂₁ are driven by the switching elements S ₁ and T ₂ which are controlled by the input signals T ₀₁ and T ₀₂ , the input signal T ₀₁ can be used as a time signal or a light/dark sensor signal. In this case, the polarized relay can be driven without manual operation. Switch H is a switch that determines the reversal direction of the polarized relay, and the input signal
T ₀₁ may be a slide switch or the like. Generally speaking, when remotely controlling lighting in buildings, supermarkets, etc., there may be around 20 or 50 lights, and in some cases over 100 lights. In such a case, switches J are required from J ₁ to Jn (n is the number of lights), and therefore electromagnetic relays are also required from R ₁₁ to R ₁ n.
is necessary. Generally, switches J and H and electromagnetic relays R ₁ n and R ₂₁ are housed in one panel and centrally controlled in one place, so as the number of lights increases, the space also increases, and the current consumption of the DC current circuit increases. The disadvantage was that it also increased. The present invention aims to extremely compact a drive circuit for a group of polarized relays for controlling a large number of lights using a predetermined input signal, and to reduce current consumption. A series circuit consisting of the coil, the auxiliary contact of the polarized relay in which a pair of diodes is connected in antiparallel to the fixed contact, the triax, and the reverse direction control switch is connected to an AC power source, and when the triax is driven. always
This is a polarized relay drive circuit with a gate circuit configured so that current flows from the _T1 terminal to the gate side. A detailed explanation will be given below based on one embodiment. Note that the same parts as in the conventional example will be explained using the same reference numerals. A is a polarized relay, and the coil B of this polarized relay A, the auxiliary contact C of this polarized relay A, the AC power supply E, the polarized relay reversal direction setting switch _H1 , and the triax _J01 are connected in series. The DC power supply K is connected in series with the diode D ₀₁ , the resistor R ₀₁ , the diode D ₀₂ , and the switching element S ₁₁ , and both ends of the resistor R ₀₁ are connected between the gate of the triac J ₀₁ and the T ₁ terminal. do. The polarized relay reversal direction setting switch _H1 is a switch that determines the reversal direction of the polarized relay depending on which of its contacts _H1a and _H1b is closed. This switch may be, for example, a contact of an electromagnetic relay.

When the input signal T01 is input when the switch _H1 is turned on the _H1a side, the switching element _S11 becomes conductive, and a current _i0 flows from the terminal _T1 to the gate of the triac _. flows, the triax conducts, current _I1 flows, and coil B of polarized relay A,
The diode D ₂ of the auxiliary contact C is connected to the power source via the b-side contact, and the coil B of the polarized relay is energized.
The polarized relay A is reversed, the main contact G is closed, and the lighting connected to the main contact G is turned on, and the auxiliary contact C is reversed from the b side to the a side and the current I ₁ stops flowing. Even if the current _I1 stops flowing, the polarized relay A will not reverse again because it is held by the permanent magnet F. Next, if you put the switch H ₁ on the H ₁ b side,
The input signal T ₀₁ is input, the switching element S ₁₁ becomes conductive, a current i ₀ flows from the terminal T ₁ of the triax J ₀₁ toward the gate, the triax becomes conductive, a current I ₂ flows, and the polarized relay A becomes conductive. Flip again. Even if the terminal _T1 of the triac is on the negative side compared to the terminal _T2 when the switch _H1 is turned on to the _H1b side, if the switching element _S11 is conductive, the gate current of the triac will be It flows from _T1 to the gate, and because of the diode _D02 , it does not flow from the gate of the triac to the terminal _T1 side. That is, since the gate current of the triac is set to flow from the terminal _T1 of the triac toward the gate, when the triac becomes conductive, the current can flow in either the direction of _I1 or the direction of _I2 . If you use this as a gate current and set it to flow from the gate side to the terminal _T1 side, it is difficult to obtain current only in the _I2 direction, and in the case of a circuit using a series circuit of an AC power supply and a polarized relay as in the present application, it is reversed. It becomes impossible to do so. When a large number of sets of the circuits shown in FIG _. 3 are provided _, as shown in FIG. The light can be turned on or off.

As described above, according to the present invention, the coil B of the polarized relay, the auxiliary contact C of the polarized relay A in which a pair of diodes D ₁ and D ₂ are connected in antiparallel to the fixed contact, and the triax J ₀₁ , A series circuit with the reversing direction control switch _H1 is connected to _the AC power source E, and a series circuit with the DC power source K, the resistor _R01 , and the triax control switching element _S11 is connected as the gate circuit of the triax J01. Both ends of the resistor R ₀₁ are connected to the gate and T ₁ terminal of the triax J ₀₁ , and a reverse current blocking diode D ₀₁ is connected from the AC power supply E to the DC power supply K, and a switching element S ₁₁ for controlling the triax J ₀₁ is connected to the triax J ₀₁ . Since the reverse current blocking diode _D02 to the gate is inserted into the series circuit as a drive circuit for a polarized relay, the input signal can be set to 0 without applying current in both directions as in the conventional manual pushbutton switch shown in FIG. Just by using a positive potential, a polarized relay can be driven in reverse, and the gate current of the triac can be changed to the terminal of the triac.
Since it is set so that the current flows from T ₁ to the gate, when the triax conducts, the current can flow either in the direction of I ₁ or in the direction of I ₂ , so the triax can be used as a switch J for driving a polarized relay. Compared to the conventional technology shown in Fig. 2, this method can be used in an extremely small space, is convenient for centralized control in one place, and has an extremely low current consumption in the DC circuit. Therefore, the capacity of the DC power supply does not need to be very large, and the cost is also low. Especially when the number of lights exceeds 100, the effect becomes even greater.

[Brief explanation of drawings]

1 to 2 are electric circuit diagrams of conventional examples of the present invention, FIGS. 3 to 5 are related to embodiments of the present invention, FIG. 3 is a basic electric circuit diagram, and FIG. FIG. 5, an electrical circuit diagram for driving the polar relay, shows another embodiment of the polar relay reversal direction setting switch. A...Polarized relay, B...Polarized relay coil,
C... Auxiliary contact for polarized relay, J ₀₁ ... Triack, H ₁ ... Reversal direction setting switch for polarized relay, S ₁₁ ... Switching element for triax control.

Claims (1)

[Claims] 1. A series circuit consisting of a coil of a polarized relay, an auxiliary contact of the polarized relay in which a pair of diodes is connected in antiparallel to a fixed contact, a triax, and a reverse direction control switch is connected to an AC power source,
As the gate circuit of the triax, both ends of the resistor of a series circuit consisting of a DC power supply, a resistor, and a switching element for controlling the triax are connected to the gate of the triax and the _T1 terminal, and a reverse current blocking diode is connected from the AC power supply to the DC power supply. A drive circuit for a polarized relay, characterized in that a backflow blocking diode from a switching element for triax control to a gate of the triax is inserted in the series circuit.