JP6492765B2 - Power supply and lighting system - Google Patents

Description

  Embodiments described herein relate generally to a power supply device and a lighting system that control power of a load.

  Some lighting fixtures using LEDs as light sources are used for light control and color adjustment. Some of these LED lighting fixtures use a phase control type dimmer, as in the conventional incandescent lamp lighting fixtures. For example, an LED lighting apparatus that performs dimming and toning of LEDs according to the phase angle of a commercial AC power supply has been proposed (see, for example, Patent Document 1). This LED lighting fixture has a light control characteristic indicating the relationship between the phase angle and the light amount, and a light control characteristic indicating the relationship between the phase angle and the color temperature, and the light control / color control characteristics according to the detected phase angle. In order to obtain, the electric current which flows into each LED from which luminescent color differs is adjusted.

JP 2012-134001 A (page 10, FIGS. 2, 16, and 17)

  Conventionally, for example, the dimming characteristics indicating the relationship between the phase angle and the amount of light are uniquely set, and the light source cannot be dimmed with various dimming characteristics. For example, there is a drawback that the amount cannot be controlled rapidly or gently. In addition, the user is required to adjust the color of the light source according to the usage environment together with the variety of dimming.

  An object of the embodiment of the present invention is to provide a power supply device and a lighting system capable of changing a load control mode by a simple operation.

  The power supply device according to the present embodiment includes a power conversion circuit and a control circuit. The power conversion circuit receives a control voltage obtained by arbitrarily changing the AC voltage of the AC power supply, and performs control so that power corresponding to the input voltage is supplied to the load.

  The control circuit is formed to include a timer unit and a control unit. The timer unit measures the interruption time of the input voltage input from the AC power source to the power conversion circuit. The control unit varies the control mode of the power conversion circuit based on the cutoff time measured by the time measuring unit, and controls the power conversion circuit in the control mode.

  According to the power supply device of the present embodiment, since the control mode of the power conversion circuit is varied based on the cutoff time of the input voltage of the power conversion circuit, the load power can be changed variously by variable control of the AC voltage of the AC power supply. I can expect to do it.

It is a schematic block diagram of the illumination system and power supply device which show the 1st Embodiment of this invention. It is a graph of the load characteristic which shows the relationship of the optical output of the load with respect to the input voltage of a power converter circuit same as the above. It is a schematic block diagram of the illumination system and power supply device which show the 2nd Embodiment of this invention. It is a schematic block diagram of the illumination system and power supply device which show the 3rd Embodiment of this invention.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First, a first embodiment of the present invention will be described.

  As shown in FIG. 1, the illumination system 1 of the present embodiment includes a lighting fixture 2, a power supply device 3, and a phase control device 4. The luminaire 2 is provided with a light source 5 as a load. The light source 5 is composed of, for example, a plurality of LEDs 6. The plurality of LEDs 6 are connected in series or in series and parallel. The power supply device 3 is connected to the AC power supply Vs via the phase control device 4, operates by inputting the AC power supply Vs, converts the AC power to DC power, supplies the light source 5, and turns on the light source 5. That is, the power supply device 3 is configured as a lighting device that lights the light source 5 in the present embodiment. The lighting fixture 2 may be provided with the power supply device 3 or may be provided separately.

  The phase control device 4 controls the phase of the sine wave AC voltage of the AC power supply Vs, and is interposed in the electric path between the AC power supply Vs and the power supply device 3. That is, the connection terminals 4 a and 4 b of the phase control device 4 are connected in the middle of the electric circuit between the AC power supply Vs and the power supply device 3. And the phase control apparatus 4 has the phase control part 7 and the power switch 8 in this embodiment. The power switch 8 opens and closes the AC voltage input from the AC power supply Vs to the power supply device 3 by manual operation.

  The phase control device 4 is called a contorx (registered trademark) and has a known configuration. That is, the phase control device 4 includes a noise prevention circuit including a capacitor C1 and an inductor L1 connected to connection terminals 4a and 4b via a power switch 8, a time constant circuit including a resistor R1, a variable resistor VR1, and a capacitor C2, and a triac. The phase control unit 7 includes TR1 and a trigger diode TD1.

  The variable resistor VR1 is connected to an operation element such as a knob or a fader, and the resistance value changes when the operation element is manually operated arbitrarily. The phase angle (conduction angle) at which the trigger diode TD1 conducts is set according to the change in the resistance value. The triac TR1 conducts at the timing of the phase angle. Here, the phase angle means the time from when the zero crossing point of the starting point of the sine wave AC voltage rises until the voltage rises. The phase control device 4 outputs a control voltage obtained by arbitrarily changing the AC voltage of the AC power supply Vs by manual operation of the operator, and inputs the control voltage to the power supply device 3.

  The power supply device 3 of the present embodiment includes a filter circuit 9, a voltage detection circuit 10, a power conversion circuit 11, and a control circuit 12. In the power supply device 3, input terminals 12 a and 12 b are connected to the AC power supply Vs via the phase control device 4, and output terminals 13 a and 13 b are connected to the light source 5. A control voltage corresponding to the phase angle is input from the phase control device 4 to the input terminals 12a and 12b.

  The filter circuit 9 prevents noise generated in the power supply device 3 from propagating to the AC power supply Vs side. The voltage detection circuit 10 includes, for example, a series circuit of a resistor R2 and a resistor R3, and detects an AC voltage (control voltage) input to the input terminals 12a and 12b with a voltage across the resistor R3. The detected AC voltage is input to the control circuit 12 and converted into a DC voltage by the control circuit 12. The voltage detection circuit 10 may be provided on either the front side or the rear side of the filter circuit 9 or may be provided on the rear side of the rectifier circuit 14 described later.

  The power conversion circuit 11 is an AC-DC conversion circuit, and is formed to include a rectifier circuit 14 and a voltage adjustment circuit 15 in the present embodiment. The rectifier circuit 14 is formed with, for example, a rectifier and a capacitor connected between the outputs of the rectifier, and rectifies an AC voltage input to the input terminals 12 a and 12 b and supplies the rectifier to the voltage adjustment circuit 15.

  The voltage adjustment circuit 15 converts the rectified voltage of the rectifier circuit 14 into a predetermined DC voltage, and is formed in a step-down chopper circuit in this embodiment. That is, the voltage adjustment circuit 15 has a series circuit of a field effect transistor Q1 and a diode D1 connected between the outputs of the rectifier circuit 14, and a series circuit of an inductor L2 and a smoothing capacitor C3 connected in parallel to the diode D1. Is formed. Both ends of the smoothing capacitor C3 are connected to the output terminals 13a and 13b.

  The field effect transistor Q1 is ON / OFF controlled by the control circuit 12 in accordance with the input voltage input to the input terminals 12a and 12b. As a result, the rectified voltage output from the rectifier circuit 14 is chopped, and a voltage (power) corresponding to the input voltage is generated across the smoothing capacitor C3. The smoothing capacitor C <b> 3 is a power supply unit that supplies power to the light source (load) 5. In this way, the power conversion circuit 11 performs control so that power corresponding to the input voltage input to the input terminals 12 a and 12 b of the power supply device 3 is supplied to the light source 5.

  In the power conversion circuit 11, the rectification circuit 14 may be a rectification smoothing circuit, and the voltage adjustment circuit 15 may be formed as a boost chopper circuit or a step-up / step-down chopper circuit.

  The control circuit 12 controls on / off of the field effect transistor Q1 of the power conversion circuit 11. In the present embodiment, the control circuit 12 includes a timer unit 16, a nonvolatile storage unit 17, a power supply unit 18, and a control unit 19. Configured.

  The timer unit 16 includes a timer circuit (not shown). During the operation, the timer unit 16 monitors the voltage across the resistor R3 of the voltage detection circuit 10 input to the control unit 19, and the resistor R3 starts when the voltage across the resistor R3 becomes almost zero. The time until voltage is generated between both ends of is measured. That is, the time measuring unit 16 measures the interruption time of the input voltage of the power supply device 3 when the power switch 8 of the phase control device 4 is turned on.

  The storage unit 17 stores a control mode in which the control unit 19 controls the field effect transistor Q1 of the voltage adjustment circuit 15. The control mode is a load characteristic indicating the light output of the light source 5 as an output corresponding to the input voltage of the power supply device 3, for example, and the storage unit 17 stores (holds) a plurality of different load characteristics. FIG. 2 is a graph showing the load characteristics, and stores the load characteristics indicated by the lines A1 to A3. The load characteristic of the line A1 indicates a relationship in which the light output (light quantity) of the light source 5 increases in proportion to the input voltage input to the input terminals 12a and 12b. The load characteristic of the line A2 is a relationship in which the optical output increases exponentially with respect to the input voltage, and increases rapidly after the optical output gradually increases as the input voltage increases. The load characteristic of the line A3 shows a relationship in which the power changes logarithmically, and the light output increases gradually after the light output increases rapidly as the input voltage increases.

  In FIG. 2, when the input voltage is 100%, it is a time when a substantially sinusoidal AC voltage of the AC power source Vs is input to the input terminals 12a and 12b. At this time, the maximum power is supplied to the light source 5. The light source 5 is all-lighted. The input voltage input to the input terminals 12a and 12b decreases from the maximum value (input voltage 100%) as the phase angle of the AC voltage of the AC power supply Vs is controlled by the phase control device 4 and the phase angle increases.

  The variable resistor VR1 of the phase control device 4 is varied within the range of the variable width of the resistance value. In the present embodiment, when the resistance value is the maximum value, the phase angle at which the TRIAC TR1 conducts becomes a value near the zero crossing time point of the AC voltage starting point, and the input terminals 12a and 12b receive a substantially sine wave from the AC power source Vs. AC voltage is input. Further, when the resistance value is the minimum value, the phase angle becomes a value close to the zero crossing point at the end point of the AC voltage, and an input voltage of, for example, 5% of the maximum value (100%) is input to the input terminals 12a and 12b. Is done.

  The variable resistor VR1 is coupled to a manually operated operator, and the resistance value varies according to the operation amount of the operator. When the operator is at the lower limit position of the operating range, the resistance value of the variable resistor VR1 is the maximum value of the variable width, and when the operator is at the upper limit position of the operating range, the resistance value of the variable resistor VR1 is variable. It is the minimum value of the width. That is, in the present embodiment, the resistance value of the variable resistor VR1 is set to decrease from the maximum value to the minimum value side as the operating element is operated from the lower limit position to the upper limit position side of the operation range.

  The power supply unit 18 supplies operating power to the timer unit 16, the control unit 19, and the like, and generates a predetermined DC power source from the rectified voltage of the rectifier circuit 14, for example. The DC power is generated in an electrolytic capacitor having a predetermined capacity, and can supply operation power to the control unit 19 and the like over a predetermined time.

  The control unit 19 is formed with a microcomputer. The controller 19 receives a DC voltage corresponding to the input voltage input to the input terminals 12a and 12b. That is, the voltage across the resistor R3 of the voltage detection circuit 10 is converted into a DC voltage corresponding to the input voltage in the previous stage of the control unit 19. And the control part 19 is formed so that on-off control of the field effect transistor Q1 of the power converter circuit 11 may be performed based on the load characteristic of line A1-A3 shown in FIG.

  Moreover, the control part 19 selects the load characteristic of line A1-A3 based on the interruption | blocking time of the input voltage which the time measuring part 16 timed, and the electric field of the power converter circuit 11 based on the selected load characteristic of line A1-A3. The effect transistor Q1 is formed to be turned on / off. For example, the control unit 19 switches the load characteristics when the input voltage cutoff time is within a predetermined period, and holds the previous load characteristics when the predetermined period is exceeded. Here, the control unit 19 sequentially selects one of the load characteristics of the lines A1 to A3 every time the input voltage is cut off within a predetermined period (for example, 3 seconds). As described above, the control unit 19 varies the control mode for controlling the on / off of the field effect transistor Q1 of the power conversion circuit 11 based on the cutoff time of the input voltage timed by the time measuring unit 16, and the field effect is changed in the variable control mode. Controls the transistor Q1.

  Next, the operation of the first embodiment of the present invention will be described.

  In the power supply device 3, when the power switch 8 of the phase control device 4 is turned on, the AC voltage from the AC power supply Vs is input to the input terminals 12a and 12b. The control circuit 12 operates, and the control unit 19 determines the light output of the light source 5 according to the input voltage input to the input terminals 12a and 22b based on the load characteristic of the light output according to the input voltage. The field effect transistor Q1 of the power conversion circuit 11 is controlled to be turned on / off so that output power is supplied to the light source 5. The light source 5 is turned on and emits visible light corresponding to the supplied power. The luminaire 2 illuminates a predetermined illumination area.

  When the power switch 8 is turned off, no AC voltage is input to the input terminals 12a and 12b, and the control unit 19 stops the on / off control of the field effect transistor Q1. As a result, power is not supplied to the light source 5 and the light source 5 is turned off. Here, the power supply unit 18 of the control circuit 12 supplies the operation power for a predetermined time (for example, 10 seconds) after the power switch 8 is turned off to operate the control circuit 12.

  When the operator of the phase control device 4 is operated when the power switch 8 is turned on, the resistance value of the variable resistor VR1 is changed, and the phase angle at which the triac TR1 conducts changes, and the input terminal 12a of the power supply device 3 changes. , 12b receives a variable AC voltage (phase-controlled control voltage). That is, when the operation element is increased or decreased within the operation range, the AC voltage input to the input terminals 12 a and 12 b of the power supply device 3 increases or decreases. The control unit 19 performs on / off control of the field effect transistor Q1 of the power conversion circuit 11 so that power corresponding to the increased or decreased input voltage is supplied to the light source 5 based on the load characteristics. The light source 5 emits visible light corresponding to the increased or decreased power.

  Thus, by moving the operating element, the light source 5 is dimmed and lit based on the load characteristics. For example, when the control unit 19 performs on / off control of the field effect transistor Q1 with the load characteristic of the line A1 shown in FIG. 2, if the operation element is moved from the lower limit position side to the upper limit position side of the operation range, the light source 5 is The power increases proportionally according to the operation of moving the operation element, and the amount of light emitted increases. The lighting fixture 2 illuminates the illumination space brightly. Further, when the operation element is moved from the upper limit position side to the lower limit position side of the operation range, the light source 5 decreases in proportion to the movement of the operation element, and the amount of light emitted decreases. The illumination space is darkly illuminated by a decrease in the amount of light emitted from the light source 5.

  Then, when moving the operating element from the lower limit position side to the upper limit position side of the operation range, when it is desired to illuminate the illumination space gently and brightly, the power switch 8 is turned on / off within a predetermined period (for example, 3 seconds). At this time, the AC voltage input to the input terminals 12a and 12b is cut off during the OFF period of the power switch 8. This cutoff time is measured by the timer unit 16 of the control circuit 12. The control unit 19 reads the load characteristics of the lines A1 to A3 stored in the storage unit 17 and reads the load characteristics of the line A2 from the load characteristics of the line A1 when the interruption time measured by the timing unit 16 is within a predetermined period. Switch to characteristics and hold. Then, the field effect transistor Q1 of the power conversion circuit 11 is on / off controlled based on the load characteristic of the line A2.

  Further, when the operation element is moved from the lower limit position side to the upper limit position side of the operation range, when it is desired to illuminate the illumination space rapidly, the power switch 8 is further turned off and on within a predetermined period (for example, 3 seconds). To do. The control unit 19 reads the load characteristics of the lines A1 to A3 stored in the storage unit 17 and reads the load characteristics of the line A3 from the load characteristics of the line A2 when the interruption time measured by the timing unit 16 is within a predetermined period. Switch to characteristics and hold. And the control part 19 carries out on-off control of the field effect transistor Q1 of the power converter circuit 11 based on the load characteristic of line A3.

  As described above, the light source 5 is dimmed by changing the power supplied in accordance with the operation of moving the operation element. The luminaire 2 illuminates the illumination space with a light amount corresponding to the light control rate of the light source 5. Here, the brightness of the illumination space can be varied by turning the power switch 8 on and off. That is, for example, when the light source 5 is dimmed based on the load characteristic of the line A1, the power switch 8 is turned on and off within a predetermined period (for example, 3 seconds) to switch to the load characteristic of the line A2. Further, when the power switch 8 is turned on / off within a predetermined period, the load characteristic of the line A3 is switched. Since the powers of the load characteristics of the lines A1 to A3 are different from the input voltages input to the input terminals 12a and 12b, the power supplied to the light source 5 is varied by switching the load characteristics. Thereby, the light quantity radiated | emitted from the light source 5 changes, and the brightness of the illumination space by the lighting fixture 2 changes.

  According to the power supply device 3 and the lighting system 1 of the present embodiment, the control unit 19 of the control circuit 12 controls the electric field of the power conversion circuit 11 based on the cutoff time of the input voltage input to the input terminals 12a and 12b of the power supply device 3. Since the control mode for controlling the on / off of the effect transistor Q1 is variable, the power of the light source 5 can be varied in various ways by the variable control of the AC voltage of the AC power source Vs by the phase control device 4, and the illumination by the lighting fixture 2 can be varied. It has the effect that it can be made.

  Further, the control circuit 12 holds a plurality of load characteristics in a selectable manner, and the control unit 19 controls the power conversion circuit 11 with the selected load characteristics, so that the light source 5 is dimmed in various ways by the phase control device 4. It has the effect that it can be made.

  In the present embodiment, the AC voltage of the AC power supply Vs is variably input to the input terminals 12a and 12b of the power supply device 3 by the AC voltage (control voltage) phase-controlled by the phase control device 4. However, the present invention is not limited to this. For example, the peak value of the AC voltage may be variably controlled and input.

  In addition, the light source 5 is used as the load. However, the load is not limited to this. For example, the load may be an electric element such as a heater. In other words, the load may be an electric element or an electric device whose power consumption is variable.

  The control circuit 12 is not limited to the load characteristics of the lines A1 to A3, and may hold other load characteristics different from each other.

  Next, a second embodiment of the present invention will be described.

  The illumination system 21 of this embodiment is configured as shown in FIG. The lighting system 21 is the same as the lighting system 1 shown in FIG. 1 except that the lighting fixture 2 is constituted by the lighting fixture 22 and the power supply device 3 is constituted by the power supply device 23, and the other configurations are the same. In FIG. 3, the same parts as those in FIG.

  The lighting fixture 22 has light sources 5A and 5B as loads. The light sources 5A and 5B are divided into groups and are composed of a plurality of LEDs 6 having different emission colors. The LEDs 6 are connected in series or in series and parallel.

  The power supply device 23 is obtained by providing a switching circuit 24 in the power supply device 3 shown in FIG. The switching circuit 24 is interposed in the electric circuit between the voltage adjustment circuit 15 of the power conversion circuit 11 and the output terminals 13a, 13c, and 13d, and is formed with field effect transistors Q2 and Q3 as switches. The field effect transistor Q2 has a drain connected to the output terminal 13b and a source connected to the negative side of the voltage adjustment circuit 15 (smoothing capacitor C3). The field effect transistor Q3 has a drain connected to the output terminal 13c and a source connected to the negative electrode side of the smoothing capacitor C3. That is, both ends of the smoothing capacitor C3 are connected to the output terminals 13a and 13c via the field effect transistor Q2 and to the output terminals 13a and 13d via the field effect transistor Q3.

  The output terminals 13a and 13c are connected between both ends of the light source 5A, and the output terminals 13a and 13d are connected between both ends of the light source 5B. The field effect transistors Q2 and Q3 have their gates (control terminals) connected to the control unit 19 of the control circuit 12, and are controlled to be turned on and off by the control unit 19. When the field effect transistor Q2 is turned on, power is supplied from the power conversion circuit 11 to the light source 5A. When the field effect transistor Q3 is turned on, power is supplied from the power conversion circuit 11 to the light source 5B.

  Next, the operation of the second exemplary embodiment of the present invention will be described.

  The control unit 19 can perform both selection of load characteristics for controlling the power of the light sources 5A and 5B and selection of the light sources 5A and 5B to be controlled. The selection of the load characteristics and the selection of the light sources 5A and 5B are performed according to the cutoff time of the on / off operation of the power switch 8. For example, when the power switch 8 is turned off and on, the control unit 19 sets the load characteristic selection mode when the cutoff time of the input voltage timed by the timer unit 16 is within a predetermined period (eg, 3 seconds), and the cutoff time is predetermined. If the period is exceeded, the light source 5A, 5B selection mode is set.

  When the input voltage cut-off time is within a predetermined period, the control unit 19 sequentially selects and holds the load characteristics of the lines A1 to A3, and turns on and off the field effect transistor Q1 of the power conversion circuit 11 with the selected load characteristics. Control.

  Further, the control unit 19 determines that the input voltage cutoff time exceeds a predetermined period (for example, 3 seconds) within a predetermined time (for example, 10 seconds) in which the control circuit 12 continues to operate after the power switch 8 is turned off. The light sources 5A and 5B are sequentially selected. For example, when the cutoff time of the input voltage is sequentially a predetermined period (for example, 3 seconds) or a predetermined time (for example, 10 seconds), the light source 5A, the light source 5B, and the light sources 5A, 5B are selected in the order.

  When the light source 5A is selected, the control unit 19 turns on the field effect transistor Q2 of the switching circuit 24 and turns off the field effect transistor Q3. When the light source 5B is selected, the field effect transistor Q3 is turned on and the field effect transistor Q2 is turned off. When both the light sources 5A and 5B are selected, the field effect transistors Q2 and Q3 are turned on.

  When the light source 5A is selected, the luminaire 22 illuminates the illumination space with the illumination light of the light source 5A, and when the light source 5B is selected, the illumination fixture 22 illuminates the illumination space with the illumination light of the light source 5B. When the light sources 5A and 5B are selected, the illumination space is illuminated with illumination light in which the emission color of the light source 5A and the emission color of the light source 5B are mixed. In this way, the lighting fixture 22 performs toning illumination according to the selection of the light sources 5A and 5B.

  Further, the control unit 19 selects the load characteristics of the lines A1 to A3 according to the on / off operation of the power switch 8, and performs on / off control of the field effect transistor Q1 of the power conversion circuit 11 with the selected load characteristics. 5A and 5B are dimmed with various color lights. Thus, the luminaire 22 has a light control / color control function that can be lit according to the usage environment of the illumination space.

  According to the power supply device 23 and the illumination system 21 of the present embodiment, the light source 5A and 5B can be selected and the load characteristics can be selected by turning on and off the power switch 8, so that various dimming and toning in the lighting fixture 22 can be performed. It has the effect that it can be performed easily.

  In this embodiment, the light sources 5A and 5B may be LEDs 6 having the same emission color, and illumination light may be partially emitted from the lighting fixture 22 by selecting the light sources 5A and 5B.

  Next, a third embodiment of the present invention will be described.

  The illumination system 31 of this embodiment is configured as shown in FIG. The lighting system 31 is the same as the lighting system 1 shown in FIG. 1 except that the lighting fixture 2 is constituted by the lighting fixture 32 and the power supply device 3 is constituted by the power supply device 33, and the other configurations are the same. In FIG. 4, the same parts as those in FIGS. 1 and 3 are denoted by the same reference numerals, and description thereof is omitted.

  The lighting fixture 32 is provided with light sources 5A and 5B as loads. The light sources 5A and 5B are composed of a plurality of LEDs 6 having different emission colors. The LEDs 6 are connected in series or in series and parallel. The light sources 5A and 5B are provided in groups, and power is supplied individually.

  The power supply device 33 is obtained by providing a power conversion circuit 34 in parallel with the power conversion circuit 11 in the power supply device 3 shown in FIG. The power conversion circuit 34 includes a rectifier circuit 35 and a voltage adjustment circuit 36. The rectifier circuit 35 and the voltage adjustment circuit 36 are formed with the same configuration as the rectifier circuit 14 and the power conversion circuit 15 of the power conversion circuit 11, respectively. That is, the rectifier circuit 35 is formed having, for example, a rectifier and a capacitor. The voltage adjusting circuit 34 is formed as a step-down chopper circuit using a field effect transistor Q4, a diode D2, an inductor L3, and a smoothing capacitor C4. Both ends of the smoothing capacitor C4 are connected to the output terminals 13e and 13f.

  The output terminals 13a and 13b on the power conversion circuit 11 side are connected to both ends of the light source 5A. The output terminals 13e and 13f on the power conversion circuit 34 side are connected to both ends of the light source 5B. The power conversion circuit 11 and the power conversion circuit 34 may be configured to share the rectifier circuit 14 or the rectifier circuit 35.

  As described with reference to FIG. 3, the control unit 19 of the control circuit 12 selects the load characteristics for controlling the light output of the light sources 5A and 5B and controls the light sources 5A and 5B to be controlled in accordance with the on / off operation of the power switch 8. Make a selection. Then, the light source 5A is dimmed by turning on / off the field effect transistor Q1 of the power conversion circuit 11 with the selected load characteristics, and the light source 5A is turned off by stopping the on / off control of the field effect transistor Q1. Further, the light source 5B is dimmed by controlling on / off of the field effect transistor Q4 of the power conversion circuit 34, and the light source 5B is turned off by stopping the on / off control of the field effect transistor Q4.

  According to the power supply device 33 and the illumination system 31 of the present embodiment, the control unit 19 of the control circuit 12 causes the power conversion circuit 11 and the power conversion circuit 34 to be selected with the selected load characteristics for the selected light sources 5A and 5B, respectively. By controlling, various light control and color adjustment can be performed by the lighting fixture 32.

  The above-described embodiment of the present invention has been presented as an example, and is 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 spirit 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.

  DESCRIPTION OF SYMBOLS 1,21,31 ... Lighting system, 2,22,32 ... Lighting fixture, 3,23,33 ... Power supply device, 4 ... Phase control device, 5, 5A, 5B ... Light source as load, 8 ... Power switch, 11 , 34 ... Power conversion circuit, 12 ... Control circuit, 16 ... Timekeeping unit, 19 ... Control unit

Claims (2)

A power conversion circuit that receives a control voltage obtained by arbitrarily changing the AC voltage of the AC power source and controls the load to supply power corresponding to the input voltage;
A timer unit for measuring a cut-off time of the input voltage, and a control unit for controlling the power conversion circuit control mode variable and the control mode of the power conversion circuit based on the interruption time, corresponding to the input voltage A control circuit having a storage unit that holds a plurality of output load characteristics so as to be selectable ;
Comprising
The load is provided in a plurality of groups,
The control unit selects the group based on the shut-off time timed by the time measuring unit and selects the load characteristic from the storage unit , and power is supplied to the load of the selected group with the selected load characteristic. And controlling the power conversion circuit as described above . A luminaire provided with a light source;
AC power source is operated is input, the power supply device according to claim 1 for lighting the light source as the load;
A phase control unit having a phase control unit that is interposed in an electric path between the AC power source and the power source device, outputs a control voltage in which an AC voltage is arbitrarily changed, and inputs the control voltage, and a power switch that opens and closes the AC power source With the device;
A lighting system comprising:

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