JP2008098004A - Light control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light control device which easily controls a supply source of AC electric power by a control means, and prevents generation of rush current. <P>SOLUTION: The light control device 1 comprises: a plurality of supply sources 7, 8 and 9 for supplying AC electric power from an AC power source 6 to a plurality of small light sources 2, 3 and 4 and a large light source 5 consuming the amount of electric power larger than that of the small light sources 2, 3 and 4; a switching means 10 for selectively switching to connect the supply sources 7, 8 and 9 to the small light sources 2, 3 and 4 respectively, and connect at least two supply sources from among the supply sources 7, 8 and 9 to the large light source 5 in parallel; and a control means 11 for controlling supply of the AC electric power from the supply sources 7, 8 and 9 to the small light sources 2, 3 and 4 and the large light source 5, respectively. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a light control device that performs light control of a light source by supplying AC power to a light source (lighting fixture) installed in a facility such as a stage, a studio, or a hall.

JP 2006-202576 A

  For example, in Patent Document 1, a plurality of supply sources that supply AC power to a plurality of small light sources and a large light source, a connection of the plurality of supply sources and the plurality of small light sources, and a connection of the plurality of supply sources and the large light source. A switching means for switching, and a control means for controlling the plurality of supply sources and the switching means, each of the plurality of supply sources being alternately responsible for supplying AC power to the large light source. In order to achieve this, there has been proposed a light control device including a command unit that gives a command to supply and stop AC power to a plurality of supply sources.

  By the way, in such a light control apparatus, although the load with respect to a several supply source can be reduced, there exists a possibility that control of the several supply source by a control means may become complicated at the time of the supply of the alternating current power with respect to a large light source. . It is also desirable to prevent the so-called rush current from being generated when switching is performed by the switching means or when switching between a plurality of sources for supplying AC power to a large light source.

  The present invention has been made in view of the above points, and an object of the present invention is to simplify the control of the AC power supply source by the control means and to prevent the generation of rush current. An object of the present invention is to provide a light control device capable of performing the above.

  The light control device according to the present invention includes a plurality of small light sources, a plurality of supply sources that supply AC power to a large light source that consumes more power than each of the plurality of small light sources, and a plurality of each of the plurality of supply sources. Switching means for selectively switching between the connection to each of the small light sources and the parallel connection of at least two of the plurality of supply sources to the large light source, and a plurality of small light sources and large light sources from the plurality of supply sources Control means for controlling supply of AC power to each of the power supply, and the control means supplies AC power to a plurality of supply sources in each of a time division period obtained by time-dividing a half cycle of AC power. A supply command unit that commands the stop, and a switching command unit that commands the switching unit to switch the connection, and the supply command unit includes at least two supplies connected to the large light source by the switching unit. Exchange against source It is adapted to direct the supply and stop of the AC power at every half cycle of the same period of power.

  According to the light control device of the present invention, in particular, the supply command unit that commands supply and stop of AC power to a plurality of supply sources in each of the time division periods in which the half cycle of AC power is time-shared Since at least two supply sources connected to the large light source by the means are instructed to supply and stop the alternating current power every half cycle of the alternating current power, Control of the supply source can be simplified, and generation of rush current can be prevented by supplying AC power from a plurality of supply sources to the large light source at the same time.

  ADVANTAGE OF THE INVENTION According to this invention, control of the supply source of alternating current power by a control means can be simplified, and also the light control apparatus which can prevent generation | occurrence | production of a rush current can be provided.

  Next, an example of an embodiment of the present invention will be described in more detail based on an example shown in the figure. The present invention is not limited to these examples.

  In FIG. 1, the dimming device 1 of this example includes a plurality of small light sources 2, 3, and 4 and a large light source 5 that consumes more power than each of the small light sources 2, 3, and 4. A plurality of sources 7, 8 and 9, a connection of each of the sources 7, 8 and 9 to each of the small light sources 2, 3 and 4 and at least two of the sources 7, 8 and 9. Switching means 10 for selectively switching the parallel connection of one supply source to the large light source 5, and the supply of AC power from the supply sources 7, 8 and 9 to the small light sources 2, 3 and 4 and the large light source 5, respectively. And control means 11 for controlling.

  The AC power source 6 is composed of a commercial power source of 50 Hz, 60 Hz, etc., in this example, a commercial power source of 50 Hz and an effective voltage of 100V. The AC power of the AC power supply 6 has an AC voltage waveform 15 as shown by a dotted line in FIG. The supply sources 7, 8 and 9 are connected to the AC power supply 6 in parallel.

  The small light sources 2, 3 and 4 and the large light source 5, which are formed in the same manner as each other, are incandescent bulbs, halogen bulbs, fluorescent lamps, HID lamps (High Intensity Discharged Lamps) and the like. In this example, the maximum power consumption of each of the small light sources 2, 3 and 4 is 1 kW at the maximum, and the maximum power consumption of the large light source 5 is 3 kW at the maximum. The small light sources 2, 3 and 4 and the large light source 5 are connected to the supply sources 7, 8 and 9 via the switching means 10. The small light source 2 is connected to the supply source 7, the small light source 3 is connected to the supply source 8, and the small light source 4 is connected to the supply source 9.

  Since the supply sources 7, 8 and 9 are formed in the same manner as each other, the supply source 7 will be described in detail below, and the supply sources 8 and 9 will be appropriately denoted by the same reference numerals in the drawings. Description is omitted.

  The supply source 7 includes a diode 19 that is energized in the positive half cycle of the AC power supply voltage from the AC power supply 6, a diode 20 that is energized in the negative half cycle of the AC power supply voltage from the AC power supply 6, and the AC power supply 6. A pair for connecting and disconnecting the AC power source 6 and the small light source 2 and the large light source 5 in a time division period T set in advance for one cycle or half cycle of the AC power source voltage, in this example, the half cycle H. And a smoothing circuit 22 for smoothing the AC voltage applied to the small light source 2 and the large light source 5 by connecting and disconnecting the alternating current power source 6 and the small light source 2 and the large light source 5 by the switch element 21. is doing. One of the pair of switch elements 21 is configured to connect and disconnect the AC power source 6 and the small light source 2 and the large light source 5 in the positive half cycle H, and the other of the pair of switch elements 21 is In the negative half cycle H, the AC power source 6 and the small light source 2 and the large light source 5 are connected and disconnected.

  The switch element 21 is made of a MOSFET such as an IGBT (Insulated Gate Bipolar Transistor), for example. The switch element 21 is connected to the AC power supply 6 and the smoothing circuit 22 via the power supply line 25, and is connected to the control means 11 via the signal line 45. The switch element 21 is configured to connect the AC power source 6 to the small light source 2 and the large light source 5 through the switching means 10 when the drain and source are allowed to be energized. The AC power supply 6 is disconnected from the small light source 2 and the large light source 5 when the power supply is in an off state in which energization is prohibited. The AC voltage applied to the small light source 2 and the large light source 5 connected to the AC power source 6 through the switching means 10 based on the operation of the switch element 21 before being smoothed by the smoothing circuit 22 is The AC voltage waveform 16 is as shown in FIG. The switch element 21 connects and disconnects the AC power source 6 and the small light source 2 and the large light source 5 in each of the time division periods T when a trigger signal is given from the control means 11 to the switch element 21. Thus, a predetermined amount of AC power is applied from the supply source 7 to the small light source 2 and the large light source 5.

  The smoothing circuit 22 has a resistor 23 and a capacitor 24 interposed between the switch element 21 and the switching means 10. The smoothing circuit 22 is connected to the switch 31 via the feeder line 25.

  The switching means 10 includes a plurality of switches 31, 32 and 33 interposed between the supply sources 7, 8 and 9 and the small light sources 2, 3 and 4 and the large light source 5. The operation of the switching devices 31, 32 and 33 switches the connection of the supply sources 7, 8 and 9 to the small light sources 2, 3 and 4 to the connection to the large light source 5 on the basis of a command from the control means 11. The connection of the sources 7, 8 and 9 to the large light source 5 is switched to the connection to the small light sources 2, 3 and 4. Such switching devices 31, 32, and 33 operate independently from each other based on a command from the control means 11. The switch 31 is connected to the supply source 7, the small light source 2, and the large light source 5 through the power supply line 25, and is connected to the control unit 11 through the signal line 45. The switch 32 is connected to the supply source 8, the small light source 3, and the large light source 5 through the power supply line 25, and is connected to the control unit 11 through the signal line 45. The switch 33 is connected to the supply source 9, the small light source 4, and the large light source 5 through the power supply line 25, and is connected to the control unit 11 through the signal line 45.

  The control means 11 including a computer or the like includes a receiving unit (not shown) that receives a dimming signal including a so-called DMX (Digital Multiplex) signal generated based on an operation of a dimming console or the like, and a receiving unit. A time division period in which the half cycle H of AC power is time-divided so that the AC voltage applied to the small light sources 2, 3 and 4 and the large light source 5 becomes a preset AC voltage based on the received dimming signal. The supply command unit 41 for instructing the supply sources 7, 8 and 9 to supply and stop AC power in each of T, and the connection to the switching means 10 based on the dimming signal received by the reception unit And a switching command unit 42 for commanding switching.

  Based on the dimming signal, the supply command unit 41 that operates according to a preset program sets the AC voltage applied to each of the small light sources 2, 3, and 4 and the large light source 5 to a preset AC voltage. The step of determining the ratio of the supply period s of AC power to each of the supply sources 7, 8 and 9 occupying each of the divided periods T, and the supply signal of the AC power supply signal for each start of the determined supply period s , 8 and 9 and a step of supplying an AC power supply stop signal to each of the supply sources 7, 8 and 9 at the end of the supply period s. The supply signal and the stop signal consist of a trigger signal for the switch element 21, and the supply command unit 41 turns on the switch element 21 by supplying the trigger signal to the switch element 21. A time division period T obtained by time-sharing the half cycle H of the AC power supply voltage of the AC power supply 6 is set in advance in the supply command unit 41. The supply command unit 41 is connected to the supply sources 7, 8, and 9 through a signal line 45.

  In such a supply command unit 41, for example, the dimming signal received by the receiving unit includes a signal indicating that the small light source 2 is dimmed with an AC power of 50% of the maximum power consumption of the small light source 2. In this case, based on the signal, a period of 50% with respect to each of the time division periods T is determined as the AC power supply period s by the supply source 7, and the small light source 3 is used as the dimming signal. When a signal indicating dimming with AC power of 30% of the maximum power consumption of the small light source 3 is included, a ratio of 30% with respect to each of the time division periods T based on the signal Is determined as an AC power supply period s by the supply source 8, and the dimming signal includes a signal indicating that the small light source 4 is dimmed with AC power at a ratio of 70% of the maximum power consumption of the small light source 4. The time division period T based on the signal. Determining a supply period s of the AC power by the supply source 9 of the 70% of the duration of the percentage of the people. In the supply command unit 41, for example, the large light source 5 is dimmed with respect to the dimming signal received by the receiving unit with an AC power of an arbitrary ratio, for example, 30%, with respect to the large light source 5. In the case where a signal to the effect is included, a period of a half (15%) of 30% with respect to each of the time division periods T based on the signal is selected from among the sources 7, 8 and 9 It is determined as the supply period s of AC power from any two supply sources, or a period corresponding to one third (10%) of 30% with respect to each of the time-sharing periods T. And 9 as the AC power supply period s. Further, in the supply command unit 41, for example, the dimming signal received by the receiving unit includes a signal indicating that any one of the large light source 5 and the small light sources 2, 3, and 4 is dimmed simultaneously. In this case, the supply period s of AC power to the large light source 5 by any two of the supply sources 7, 8 and 9 is determined based on the signal, and the supply sources 7, 8 and 9 An AC power supply period s is determined for any one of the small light sources 2, 3 and 4 by the remaining one of the supply sources. The supply command unit 41 may determine the supply period s so that the supply periods s of the AC power to the large light source 5 by the supply sources 7, 8 and 9 are equal to each other. The supply period s may be determined so that the AC power supply periods s to the large light source 5 by any two of the supply sources 8 and 9 are equal to each other.

  The switching command unit 42 is connected to each of the switches 31, 32, and 33 via the signal line 45, and generates a switching command signal based on the dimming signal to generate each of the switches 31, 32, and 33. To switch the switching devices 31, 32 and 33 to perform switching operation. In such a switching command unit 42, for example, when the dimming signal received by the receiving unit includes a signal for dimming the small light source 2, the supply source 7 is connected to the small light source via the switch 31. 2 is determined using a sensor or the like to determine whether it is connected or disconnected, and if it is determined that it is in a connected state, the operation is terminated without generating a switching command signal. If it is determined that the connection is established, a switching command signal is generated and sent to the switch 31. When the dimming signal includes a signal for dimming the small light sources 3 and 4, the switchers 32 and 33 are operated in the same manner as described above. In the switching command unit 42, for example, when the dimming signal received by the receiving unit includes a signal for dimming the large light source 5, the supply sources 7, 8, and 9 are switched to the large light source 5. On the other hand, it is determined whether it is connected or disconnected using a sensor or the like, and if it is determined that it is in a connected state, the operation is terminated without generating a switching command signal, and the disconnected state Is generated and sent to the switching devices 31, 32 and 33, or any two of the supply sources 7, 8 and 9 are connected to the large light source 5 or Judgment is made using a sensor or the like in a non-connected state, and if it is determined to be in a connected state, the operation is terminated without generating a switching command signal, and the non-connected state is determined. In this case, a switching command signal is generated and the switches 31, 32 and 33 are used. Send a switching command signal to one or two. Further, in the switching command unit 42, for example, when the dimming signal received by the receiving unit includes a signal for dimming the small light source 4 and the large light source 5 at the same time, the supply source 9 is the small light source. 4 is determined using a sensor or the like to determine whether it is in a connected state or a non-connected state, and when it is determined that it is in a connected state, the switching device 33 does not generate a switching command signal. When the connection state by 33 is maintained and it is determined that it is in the non-connection state, a switch command signal for the switch 33 is generated and sent to the switch 33, and the supply sources 7 and 8 are connected to the large light source 5. On the other hand, it is determined using a sensor or the like whether it is in a connected state or a non-connected state, and when it is determined that it is in a connected state, the switching device is not generated without generating a switching command signal for the switching devices 32 and 33. The connection state by 32 and 33 is maintained. And, if it is determined to be in an unconnected state and sends to the switch 32 and 33 which occurred a switching command signal in the non-connected state.

  Hereinafter, in the light control device 1 of this example, the light control of the small light sources 2, 3 and 4 and the large light source 5 will be described in detail. First, a dimming signal including a DMX signal generated by operating a dimming console or the like is received by the receiving unit of the control means 11, and the content of the dimming signal is determined by the receiving unit.

  When the receiving unit determines that the dimming signal includes a signal for dimming the small light sources 2, 3, and 4, the switching command unit 42 causes each of the supply sources 7, 8, and 9 to When it is determined that the connected state and the disconnected state are respectively connected to 2, 3, and 4, and the connected state is determined, the switching command unit 42 does not perform the switching operation on the switching units 31, 32, and 33. When it is determined that the processing is finished and the connection is not established, the switching devices 31, 32 and 33 are switched to operate the supply sources 7, 8 and 9 and the small light sources 2, 3 and 4, respectively. Are connected, and the process by the switching command unit 42 is terminated. Next, the supply command unit 41 starts an AC power supply command to each of the supply sources 7, 8, and 9 to supply AC power to each of the small light sources 2, 3, and 4, Each of 3 and 4 is dimmed as desired.

  When the receiving unit determines that the dimming signal includes, for example, a signal for dimming only the small light source 2, the switching command unit 42 performs processing on the switching unit 31 and the supply command unit 41 in the same manner as described above. Processing for the supply source 7 is executed. At this time, processing by the switching units 32 and 33 and the switching command unit 42 and the supply command unit 41 for the supply sources 8 and 9 is not executed, and the supply sources 8 and 9 supply AC power to the small light sources 3 and 4. It is in a state that can not be. The same process is performed when the dimming signal includes a signal for dimming only the small light source 3 or 4.

  When the receiving unit determines that the dimming signal includes a signal indicating that only the large light source 5 is dimmed, the switching command unit 42 causes each of the supply sources 7, 8, and 9 to be connected to the large light source 5. When the connected and unconnected states are determined and it is determined that each of the supply sources 7, 8 and 9 and the large light source 5 are in the connected state, the switching devices 31, 32 and 33 are not switched. When the processing by the switching command unit 42 is finished and it is determined that the switch is in a disconnected state, the switching devices 31, 32 and 33 are switched to perform the supply sources 7, 8 and 9 and the large light source 5 respectively. Are connected in parallel, and the process by the switching command unit 42 is terminated. Next, an instruction to supply AC power to each of the supply sources 7, 8, and 9 by the supply command unit 41 is started, and AC power is supplied to the large light source 5 to dim each of the large light sources 5 as desired. To do. The AC power supplied from the supply source 7 to the large light source 5, the AC power supplied from the supply source 8 to the large light source 5, and the AC power supplied from the supply source 9 to the large light source 5 may be equal to each other. Good. When the receiving unit determines that the dimming signal includes a signal indicating that only the large light source 5 is dimmed, the switching command unit 42 selects any one of the supply sources 7, 8, and 9. When it is determined that one of the two light sources 5 is connected to or disconnected from the large light source 5, and any two of the supply sources 7, 8 and 9 are connected to the large light source 5, the switch When it is determined that the switching command unit 42 is terminated without performing switching operation on any two of 31, 32, and 33, and the switch 31, 32, and 33 The switching operation is performed on any two of them, the supply sources 7, 8 and 9 and the large light source 5 are connected in parallel, and the processing by the switching command unit 42 is finished. Next, an instruction to supply AC power to any two of the supply sources 7, 8, and 9 by the supply command unit 41 is started, and AC power is supplied to the large light source 5 to each of the large light sources 5. Is dimmed as desired. At this time, the processing by the switching command unit 42 and the supply command unit 41 for the remaining one of the switching devices 31, 32, and 33 and the remaining one of the supply sources 7, 8, and 9 is not performed, and the supply The remaining one of the sources 7, 8, 9 is in a state where AC power cannot be supplied to the large light source 5.

  When the receiving unit determines that the dimming signal includes a signal indicating that the large light source 5 and, for example, the small light source 4 are simultaneously dimmed, the switching command unit 42 causes the supply sources 7 and 8 and the large light source 5 to Are connected and disconnected, and connected and disconnected between the supply source 9 and the small light source 4, and when it is determined that each is in the connected state, the processing by the switching command unit 42 is terminated. When it is determined that the connection state is established, the switching units 31, 32, and 33 are switched so that the supply sources 7 and 8 and the large light source 5 are connected in parallel and the supply source 9 and the small supply source 9 are small. The process by the switching command part 42 is complete | finished as the state connected with the light source 4. FIG. Next, an instruction to supply AC power from the supply sources 7, 8 and 9 by the supply command unit 41 is started, and AC power is supplied from the supply sources 7 and 8 to the large light source 5. AC power is supplied to the small light source 4 to dim the large light source 5 and the small light source 4 as desired.

  According to the light control device 1 of this example, a plurality of supplies for supplying AC power to the plurality of small light sources 2, 3 and 4 and the large light source 5, which consumes more power than each of the small light sources 2, 3 and 4. A source 7, 8 and 9, a connection to each of the small light sources 2, 3 and 4 of the sources 7, 8 and 9 and a large light source 5 of at least two of the sources 7, 8 and 9; Switching means 10 for selectively switching the parallel connection to the power source, and control means 11 for controlling the supply of AC power from the supply sources 7, 8 and 9 to the small light sources 2, 3 and 4 and the large light source 5. The control means 11 is provided with a supply command unit for instructing the supply sources 7, 8 and 9 to supply and stop the AC power in each of the time division periods T obtained by time-sharing the half cycle H of the AC power. 41 and command the switching means 10 to switch the connection. The supply command unit 41 supplies the AC power to the at least two supply sources connected to the large light source 5 by the switching unit 10 every half cycle H of the AC power. Since the supply and the stop thereof are instructed, the control of the AC power supply sources 7, 8 and 9 by the control means 11 can be simplified, and the supply sources 7, 8 and 9 can be controlled greatly. Generation of rush current can be prevented by supplying AC power to the light source 5 at the same time.

It is a conceptual explanatory view of an example of an embodiment of the invention. It is explanatory drawing regarding the alternating voltage waveform of the example shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dimming device 2, 3, 4 Small light source 5 Large light source 6 AC power supply 7, 8, 9 Supply source 10 Switching means 11 Control means 41 Supply command part 42 Switching command part

Claims (1)

  A plurality of supply sources for supplying AC power to a plurality of small light sources and a large light source that consumes more power than each of the plurality of small light sources, and a plurality of supply sources connected to each of the plurality of small light sources Switching means for selectively switching the parallel connection of at least two of the plurality of sources to the large light source, and supply of AC power from the plurality of sources to each of the plurality of small light sources and the large light source A control means for controlling, and the control means is a supply command section for instructing supply and stop of the AC power to a plurality of supply sources in each of the time division periods obtained by time-sharing a half cycle of the AC power. And a switching command unit that commands the switching unit to switch the connection, and the supply command unit supplies the AC power to at least two supply sources connected to the large light source by the switching unit. Half a cycle And has light control device adapted to command the supply and stop of the AC power in each.

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