JP5598660B2 - Power supply device and lighting device - Google Patents

Description

  Embodiments described herein relate generally to a power supply device including a plurality of power supply circuits and a lighting device using the power supply device.

  Conventionally, there is a power supply device including a power supply circuit that supplies a predetermined load power to a load. In this power supply apparatus, when there are a plurality of loads that supply load power, the power supply apparatus is not used as many as the number of loads, but a plurality of power supply circuits are integrally provided in consideration of workability and assembly of the power supply apparatus. There is a power supply.

  In the power supply device integrally provided with the plurality of power supply circuits, the plurality of power supply circuits are accommodated in one case, and, for example, a commercial AC power input from a common power input portion of the case is provided on the input side of each power supply circuit. The power is supplied to each load from the output side of each power supply circuit.

Japanese Patent Laid-Open No. 2003-7122

  However, since the power supply apparatus provided with a plurality of power supply circuits is simply a configuration in which a plurality of power supply circuits are accommodated in one case, the number of parts can be reduced or simplified. Sufficient consideration was not given to such things.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a simplified power supply device having a plurality of power supply circuits while reducing the number of components, and an illumination device using the power supply device. And

The power supply device of the embodiment includes a case. A plurality of substrates, the main circuit of each power supply circuit to a plurality of substrates are mounted, the surge absorption circuit to a common by a plurality of power supply circuits to the first substrate of the plurality of substrates are mounted, the plurality of substrates Among them, a dimming signal processing circuit shared by a plurality of power supply circuits is mounted on the second board, and the plurality of boards are crossed in order to make these surge absorption circuit and dimming signal processing circuit available to other boards. A substrate unit is housed in a case connected by wiring.

  According to the present invention, the main circuit of the power supply circuit is mounted on each of the plurality of substrates, and the common circuit shared by the plurality of power supply circuits is mounted on one substrate among the plurality of substrates, and this common circuit is mounted on the other substrate. In order to be able to use it, multiple boards are connected by cross wiring, so there is no need to mount a common circuit on each of the boards, and while having multiple power supply circuits, the number of parts is reduced and the power supply is simplified Can be expected.

It is a block diagram of the illuminating device which shows one Embodiment. It is a circuit diagram of the power supply circuit mounted in each board | substrate of an illuminating device same as the above.

  Hereinafter, an embodiment will be described with reference to FIGS. 1 and 2.

  In FIG. 1, reference numeral 11 denotes a lighting device as a load device. The lighting device 11 includes a plurality of light sources 12 a and 12 b which are, for example, two systems of loads or load circuits, and load power to each of the light sources 12 a and 12 b. One power supply device 13 for supplying DC power is provided. The illumination device 11 may be, for example, one in which two light sources 12a and 12b and a power supply device 13 are provided in one instrument body, or the light sources 12a and 12b are provided in separate instrument bodies, respectively. And the power supply device 13 may be electrically connected.

  Each of the light sources 12a and 12b is configured by connecting a plurality of LEDs 15 in series as semiconductor light emitting elements.

  The power supply device 13 includes an elongated cylindrical case 17 made of, for example, aluminum, and a substrate unit 18 accommodated in the case 17, with one end of the case 17 being an input unit 19 and the other end being an output unit 20. Yes. The input unit 19 is connected to a pair of power supply lines 22 for supplying a commercial AC power supply 21, and is connected to a pair of light control light 24 for inputting a light control signal such as a PWM signal from an external light control device 23. The output unit 20 is connected to two pairs of connection lines 25a and 25b that connect the light sources 12a and 12b.

  The board unit 18 includes a plurality of boards 27a and 27b which are formed in the same shape and are elongated, and power supply circuits 28a and 28b are mounted on the boards 27a and 27b, respectively. Specifically, the main circuits 29a and 29b of the power supply circuits 28a and 28b are mounted on the two boards 27a and 27b, respectively, and only one (first) board 27a is shared by the plurality of power supply circuits 28a and 28b. A common circuit 30 having a circuit configuration that can be configured is mounted, and in order to make the common circuit 30 available on the other (second) substrate 27b side, a pair of connecting wires 31 is provided between the two substrates 27a and 27b. Are electrically connected.

  The substrates 27a and 27b have a power input portion 32 formed on one end side in the longitudinal direction and a load output portion 33 formed on the other end side, with the power input portion 32 side of these substrates 27a and 27b facing each other. It is stored in case 17. In case 17, power input wiring 34 connected to power line 22 of commercial AC power supply 21 is connected between input part 19 of case 17 and power input part 32 of boards 27a and 27b, respectively. Between the input unit 19 and the power input unit 32 of one substrate 27a or other input unit, a signal input wiring 35 connected to the light control light 24 of the light control device 23 is connected, and the output unit 20 of the case 17 Load output wirings 36a and 36b connected to the connection lines 25a and 25b of the light sources 12a and 12b are connected between the substrates 27a and 27b.

  The common circuit 30 includes a surge absorbing circuit 38 that protects the circuit by absorbing abnormal voltage such as a lightning surge, and a dimming signal processing circuit 39 that processes the dimming signal input from the dimming device 23. ing.

  Next, FIG. 2 shows a circuit diagram of the power supply circuits 28a and 28b mounted on the boards 27a and 27b of the lighting device 11. FIG.

  First, the power supply circuit 28a mounted on one substrate 27a will be described.

  A surge absorption circuit 38 that is a part of the common circuit 30 is connected to the commercial AC power supply 21, and an input terminal of a full-wave rectification circuit 41 that performs full-wave rectification of the AC power supply that forms a part of the main circuit 29a is connected. ing. The output terminal of the full wave rectifier circuit 41 is connected to the input terminal of a power factor correction (PFC) circuit 42 mainly composed of a boost chopper that boosts the DC voltage. The DC voltage is stepped down to the output terminal of the power factor correction circuit 42. A DC converter 43 mainly including a step-down chopper that performs a DC voltage conversion operation is sequentially connected, and one light source 12a is connected to an output terminal of the DC converter 43.

  The power factor correction circuit 42 and the DC converter 43 are controlled by a control circuit 44. The control circuit 44 inputs an output voltage detected by the voltage detection unit 45 from the output terminal of the power factor correction circuit 42, and further inputs a dimming signal from the dimming device 23, and the power factor improvement circuit 42 and The DC converter 43 is controlled so that the light source 12a is dimmed.

  A dimming signal processing circuit 39 that is a part of the common circuit 30 is connected to the dimming device 23. The dimming signal processing circuit 39 includes a full-wave rectification circuit 47 that full-wave rectifies the dimming signal input from the dimming device 23, and a protection circuit 48 that performs current adjustment and overvoltage protection.

  A photodiode 50 of a photocoupler 49 constituting a part of the main circuit 29a is connected to the output terminal of the dimming signal processing circuit 39. The phototransistor 51 of the photocoupler 49 is connected to the dimming signal output circuit 52, and the dimming signal is output from the dimming signal output circuit 52 to the control circuit 44.

  Therefore, on one substrate 27a, a full-wave rectifier circuit 41, a power factor correction circuit 42, a DC converter 43, a control circuit 44, a voltage detection unit 45, a photodiode 50 of a photocoupler 49, a dimming signal output circuit 52, etc. The main circuit 29a including the common circuit 30 including the surge absorbing circuit 38 and the dimming signal processing circuit 39 is mounted.

  Subsequently, the power supply circuit 28b mounted on the other substrate 27b will be described.

  Only the main circuit 29b having the same configuration as the main circuit 29a mounted on the one substrate 27a is mounted on the other substrate 27b, and the common circuit 30 is not mounted.

  That is, the other substrate 27b includes a full-wave rectifier circuit 41, a power factor correction circuit 42, a DC converter 43, a control circuit 44, a voltage detection unit 45, a photodiode 50 of a photocoupler 49, a dimming signal output circuit 52, and the like. Only the main circuit 29b including it is mounted.

  Next, the operation of the power supply device 13 will be described.

  The commercial AC power supply 21 that is input to the power supply device 13 is input to each of the boards 27a and 27b. Thereby, in the power supply circuits 28a and 28b of the substrates 27a and 27b, respectively, the full-wave rectifier circuit 41 converts AC power into DC voltage, and the power factor improvement circuit 42 boosts the DC voltage to improve the power factor. The direct-current converter 43 steps down the direct-current voltage, adjusts it to a predetermined value, and outputs it to the light sources 12a and 12b. As a result, a load current flows through the LEDs 15 of the light sources 12a and 12b, and the LEDs 15 of the light sources 12a and 12b are turned on.

  On one substrate 27a, the dimming signal transmitted from the dimming device 23 is input to the dimming signal processing circuit 39, and the dimming signal output from the dimming signal processing circuit 39 is the photo of the photocoupler 49. The light is output from the dimming signal output circuit 52 to the control circuit 44 via the diode 50 and the phototransistor 51. The dimming signal output from the dimming signal processing circuit 39 is transmitted from the one substrate 27a to the other substrate 27b through the crossover wiring 31. On the other substrate 27b, the dimming signal output from the dimming signal processing circuit 39 on one substrate 27a is output from the dimming signal output circuit 52 to the control circuit 44 via the photodiode 50 and the phototransistor 51 of the photocoupler 49. Is done.

  In each of the boards 27a and 27b, the control circuit 44 inputs the output voltage detected by the voltage detection unit 45 and the dimming signal output from the dimming signal output circuit 52, and the power factor correction circuit 42 and the DC converter The operation of 43 is controlled, and the LEDs 15 of the light sources 12a and 12b are dimmed.

  According to the power supply device 13 configured as described above, the main circuits 29a and 29b of the power supply circuits 28a and 28b are mounted on the two substrates 27a and 27b, respectively, and can be shared by the plurality of power supply circuits 28a and 28b. Since the common circuit 30 is mounted on only one substrate 27a and the common circuit 30 is connected to the other substrate 27a by the wiring 31 so that the common circuit 30 can be used, the common circuit 30 is connected to two substrates. The power supply device 13 can be simplified by reducing the number of parts for one common circuit 30 while providing the two power supply circuits 28a and 28b without having to be mounted on each of 27a and 27b.

  Further, since the two substrates 27a and 27b have the same shape, they can be shared and can be configured at low cost.

  In addition, since the power input section 32 side of the two boards 27a and 27b face each other and is housed in the case 17, the power input section 32 side and the load output section 33 side of the two boards 27a and 27b The two creeping distances can be easily secured, the two substrates 27a and 27b can be accommodated in the case 17 in a compact manner, and the power supply device 13 can be miniaturized.

  Furthermore, by separating one end side of the case 17 as the power input part 32 and the other end side as the load output part 33, the input side and the output side in the case 17 can be easily separated. Generation of noise due to mutual electromagnetic interference with the side can be suppressed.

  The common circuit 30 may be, for example, a noise prevention circuit connected to the commercial AC power supply 21 in place of the surge absorption circuit 38 or together with the surge absorption circuit 38.

  The common circuit 30 may be mounted on only one of the boards 27a and 27b. For example, the surge absorbing circuit 38 is mounted only on one board 27a, and only the other board 27b is adjusted. Alternatively, the optical signal processing circuit 39 may be mounted on the substrates 27a and 27b.

  Further, the power supply circuit 13 includes only two systems including the boards 27a and 27b and the power supply circuits 28a and 28b, but may include three systems, four systems, or more systems.

  Further, the illumination device 11 is not limited to the one using the LED 15 for the light sources 12a and 12b, but can be similarly applied to a lighting device using a lamp such as a fluorescent lamp or a discharge lamp.

  Further, the power supply device 13 can be applied not only to the lighting device 11 having the light sources 12a and 12b as loads, but also to a load device having a load such as a motor.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

11 Lighting equipment
12a, 12b light source
13 Power supply
17 cases
18 Board unit
27a Substrate as first substrate
27b Substrate as second substrate
28a, 28b Power circuit
29a, 29b Main circuit
30 Common circuit
31 Crossover wiring
32 Power input section
38 Surge absorption circuit
39 Dimming signal processing circuit

Claims (3)

With the case;
A plurality of substrates, the main circuit of each power supply circuit to a plurality of substrates are mounted, the surge absorption circuit to a common by a plurality of power supply circuits to the first substrate of the plurality of substrates are mounted, the plurality of substrates Among them, a dimming signal processing circuit shared by a plurality of power supply circuits is mounted on the second board, and the plurality of boards are crossed in order to make these surge absorption circuit and dimming signal processing circuit available to other boards. A substrate unit housed in a case connected by wiring;
A power supply device comprising: 2. The power supply device according to claim 1, wherein two substrates are provided, each having a power input portion, and stored in the case with the power input portions of the substrates facing each other. A power supply device according to claim 1 or 2;
A plurality of light sources each supplied with power from each power supply circuit of the power supply device;
An illumination device comprising:

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