JP2018181437A - Control device, load device and control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small-sized and inexpensive control device or the like which prevents power supply delay or inrush current increase, the control device being a two-wire type for adding control information consisting of digital information to an AC voltage from a commercial AC power source.SOLUTION: A two-wire type control device 1 is connected between a commercial AC power source 3 and a load device 2 which receives power supply from the commercial AC power source. The two-wire control device comprises: a power source supply part 103 which secures a power source of the control device by blocking a first period at conduction angles from 90 degrees to 180 degrees in every half cycle of an AC voltage from the commercial AC power source 3; and control information addition means 102 for adding control information consisting of digital information to the AC voltage to be supplied from the commercial AC power source 3 to the load device 2 in accordance with whether a second period excluding the first period that gas been blocked for securing the power source, is blocked or not at the conduction angles from 90 degrees to 180 degrees in every half cycle.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a two-wire control device which adds control information consisting of digital information to a waveform of a commercial alternating current power supply, for example, to control a load device such as an LED lighting device, and a load device controlled by this control device It relates to a control system.

  For the LED lighting device to which power is supplied from a commercial AC power supply, for example, control information including digital information for setting and controlling light adjustment and color adjustment is added to an AC voltage from the commercial AC power supply to the LED lighting device The control device which outputs is known conventionally.

  For example, Patent Document 1 discloses a light control system in which digital information is added by removing a plurality of half cycles of a commercial AC power supply, and a fishing line of a lighting device is performed based on the digital information.

  Further, Patent Document 2 discloses that digital information is added by forming a notch pattern at a portion having a conduction angle of 0 degree to 90 degrees in a half cycle of an alternating current voltage from a commercial alternating current power supply.

Patent No. 586 5478 Patent No. 5838239 gazette

  However, as described in Patent Document 1, in the method of adding control information by removing a half cycle of AC voltage, a delay occurs in the power supply, and a power holding circuit is required, resulting in an increase in size and cost. There is a problem that it becomes a factor of up.

  In addition, as described in Patent Document 2, in the method of forming a notch pattern and adding control information to a portion with a conduction angle of 0 degree to 90 degree in a half cycle of an alternating voltage, the voltage is being increased in a half cycle. There is a problem that the rush current increases to turn on the switch element, which also causes an increase in size and cost. In addition, noise is generated due to inrush current, so that noise may be generated or other devices may be affected.

  The present invention has been made in view of such technical background, and is a two-wire control device for adding control information consisting of digital information to an AC voltage from a commercial AC power supply, and a plurality of AC voltages There is no delay in the power supply as in the case of removing half cycles of the inrush current, and inrush current as in the case of forming a notch pattern in the portion of conduction angle 0 degree to 90 degree in half cycle of AC voltage. It is an object of the present invention to provide a compact and inexpensive controller without any increase in the load, and to provide a load device and a control system controlled by the controller.

The above-mentioned subject is solved by the following means.
(1) A two-wire control device connected between a commercial AC power supply and a load device receiving power supply from the commercial AC power supply, wherein the conduction angle at every half cycle of the AC voltage by the commercial AC power supply A power supply unit that secures the power supply of the control device by shutting off the first period of 90 degrees to 180 degrees and a power supply section that cuts off the power supply of 90 degrees to 180 degrees in every half cycle Control information adding means for adding control information consisting of digital information to the AC voltage supplied from the commercial AC power supply to the load device according to whether or not the second period is cut off except the first period. A control device characterized by
(2) The control device according to the above item 1, wherein the control information adding means adds control information to an AC voltage only when setting the load device according to the control information, and does not add control information after the setting is completed.
(3) The control device according to (1) or (2), wherein the load device is an LED lighting device, and the control information is information for setting at least one of dimming and toning of the lighting device.
(4) A load device which receives power supply from the commercial alternating current power supply via the control device according to any one of the preceding claims 1 to 3, wherein impedance relative to an input of at least the second period of the alternating current voltage A load device comprising an impedance drop circuit for reducing the
(5) A control system comprising the control device according to any one of items 1 to 3 above and the load device according to item 4 above.

  According to the invention described in the preceding paragraph (1), the power supply of the control device is secured by interrupting the first period of the conduction angle of 90 degrees to 180 degrees in every half cycle of the AC voltage by the commercial AC power supply. There is no delay in power supply, and therefore no special power holding circuit is required. Moreover, the alternating current due to being supplied from the commercial alternating current power supply to the load device according to the presence or absence of interruption of the second period excluding the first period which is interrupted to secure the power supply among the conduction angles of 90 degrees to 180 degrees in every half cycle. Since control information is added to the voltage, a large inrush current as in the case of forming a notch pattern does not occur at a portion where the conduction angle is 0 degree to 90 degree in a half cycle of AC voltage by a commercial AC power supply. Therefore, it becomes an inexpensive and compact control device.

  According to the invention described in the preceding paragraph (2), the control information adding means adds the control information to the AC voltage only when setting the load device according to the control information and does not add the control information after the setting is completed. The time for additional processing can be reduced, and power consumption can be reduced accordingly.

  According to the invention described in the preceding paragraph (3), it is possible to add control information for setting at least either light adjustment or color adjustment of the LED lighting device which is a load device, to the AC voltage by the commercial AC power supply. .

  According to the invention described in the preceding paragraph (4), the load apparatus receiving power supply from the commercial AC power supply via the control apparatus described in any one of the preceding paragraphs 1 to 3 comprises at least at least one of the alternating voltage to which the control information is added. Since the impedance lowering circuit for lowering the impedance with respect to the input in the second period is provided, distortion when the alternating voltage to which the control information is added is input in the second period can be suppressed. Therefore, highly accurate analysis and extraction of control information can be performed.

  According to the invention described in the preceding paragraph (5), highly accurate analysis / extraction of control information consisting of digital information added to an AC voltage from an inexpensive and compact two-wire control device and a commercial AC power supply can be performed. It becomes a control system equipped with a load device that can

It is a block diagram of a control system concerning one embodiment of this invention. FIG. 1 is a circuit diagram showing a schematic configuration of a two-wire control device 1; FIG. 2 is a circuit diagram showing a schematic configuration of a load device 2. (A) is a voltage waveform diagram between A and C points, (B) is a voltage waveform diagram between B and C points, (C) is a voltage waveform diagram between A and B points, and (D) is a diagram FIG. 6 is a signal waveform diagram of point d of 2; (A) (B) is an explanatory view of a specific example in the case of adding control information consisting of digital information to an AC voltage from a commercial AC power supply. (A) (B) is a figure for demonstrating a mode that the waveform of the alternating voltage input into a load apparatus is distorted. (A) to (C) are operation explanatory diagrams of the impedance reduction circuit for eliminating the waveform distortion of FIG.

  Hereinafter, an embodiment of the present invention will be described based on the drawings.

  FIG. 1 is a block diagram of a control system according to an embodiment of the present invention. The control system comprises a two-wire controller 1 and a load device 2.

  The two-wire control device 1 is provided between the commercial AC power supply 3 and the load device 2 in one of the two power supply lines 4 and 5 directed from the commercial AC power supply 3 to the load device 2. Is located in In the following description, a portion on the power supply line 41 connecting the commercial AC power supply 3 and the two-wire control device 1 is a point A, and a portion on the power supply line 42 connecting the two-wire control device 1 and the load device 2 is B A point on the power supply line 5 connecting the load device 2 and the commercial AC power supply 3 is taken as a point C.

  The load device 2 is a device that receives power supply from the commercial AC power supply 3 to drive the load, and the type is not limited. , Air conditioners, televisions etc.

  The two-wire type control device 1 adds control information consisting of digital information to the AC voltage supplied from the commercial AC power supply 3 to the load device 2 and sends it to the load device 2. Although the type of the two-wire control device 1 is not limited, as an example, a light adjustment / color adjustment control device for setting and controlling light adjustment and / or color adjustment of the LED lighting device can be mentioned. Of course, it may be a two-wire control device that controls the motor drive device, the heater drive device, the air conditioner, the television and the like described above.

  FIG. 2 is a circuit diagram showing a schematic configuration of the two-wire control device 1. As shown in the figure, the two-wire control device 1 includes a switching unit 101, a control unit 102, a power supply unit 103, a voltage monitoring unit 104, and a drive unit 105.

  The switching unit 101 uses a MOSFET (metal-oxide-semiconductor field-effect transistor) in this embodiment. Specifically, two MOSFETs 101a and 101b are reversely connected (back-to-back) in series in the middle of one power supply line 4 of the commercial AC power supply 3, and the power supply line 4 is connected to the two power supply lines 41. It is divided into power supply lines 42. The gates of the two MOSFETs 101a and 101b are both connected to the drive unit 105 via the resistors 106 and 107, and the switching unit 101 formed of the two MOSFETs 101a and 101b is turned on or off based on the drive signal from the drive unit 105. It is supposed to The configuration of the switching unit 101 is not limited to that shown in the drawings, as long as it is an element that performs on / off operation by a drive signal from the drive unit 105, and may be configured by a transistor or the like.

  The power supply unit 103 has a function of supplying power to the control unit 102, and the input side of the power supply unit 103 is connected to the power supply lines 41 and 42 on both sides of the switching unit 101 through diodes 108 and 109, respectively. The output side of the power supply unit 103 is connected to the control unit 102. The cathodes of the diodes 108 and 109 are connected to the power supply unit 103, and the power supply unit 103 receives AC power sent from the commercial AC power supply 3 via the power supply lines 4 and 5, and the control unit It is possible to supply power to 102.

  The voltage monitor unit 104 has a function of monitoring the AC voltage from the commercial AC power supply 3 and detecting the zero cross of the AC voltage. The input side of the voltage monitor unit 104 is connected to the power supply lines 41 and 42 on both sides of the switching unit 101 respectively. The output side of the voltage monitor unit 104 is connected to the control unit 102. Further, the cathode side of each of the diodes 110 and 111 is connected to the voltage monitor unit 104, and the voltage monitor unit 104 monitors the value of the AC voltage sent from the commercial AC power supply 3 via the power supply lines 4 and 5. The zero cross detection result can be output to the control unit 102.

  The driving unit 105 has a function of receiving control signals from the control unit 102 and drivingly controlling on / off of the switching unit 101.

  The control unit 102 sends a control signal for turning on / off the switching unit 101 to the drive unit 105 based on the zero cross detection result of the AC voltage by the voltage monitoring unit 104. In this embodiment, when the switching unit 101 is turned on and off, control information consisting of a combination of digital information of 1 and 0 is added to the alternating voltage from the commercial alternating current power supply 3 and supplied to the load device 2. The control unit 102 outputs a control signal for turning on / off the switching unit 101 to the driving unit 105 so that control information is added to the AC voltage. This point will be described later.

  Further, although the power supply to the control unit 102 is performed by the power supply unit 103 as described above, the output side of the power supply line of the control unit 102 on the anode side is the control unit in order to close the power supply path. The power supply lines 41 and 42 on both sides of the switching unit 101 are respectively connected via two diodes 112 and 113 connected to 102.

  FIG. 3 is a circuit diagram showing a schematic configuration of the load device 2. As shown in the figure, the load device 2 includes a full-wave rectifier circuit 201, a smoothing capacitor 202, a power supply unit 203, a voltage monitor unit 204, an impedance reduction circuit 205, a control unit 206, and a drive unit 207. , Load 208 and the like.

  The full wave rectification circuit 201 performs full wave rectification on the alternating voltage from the commercial alternating current power supply 3, and the input terminals thereof are connected to the two power supply lines 42 and 5 respectively.

  The smoothing capacitor 202 is connected to the output of the full wave rectification circuit 201, and smoothes the full wave rectified voltage by the full wave rectification circuit 201.

  The power supply unit 203 receives AC power from the two power supply lines 42 and 5 and the diodes 209 and 210 whose cathodes are connected to the power supply unit 203, and supplies power to the control unit 206. Have.

  The voltage monitor unit 204 detects the value of the AC voltage from the commercial AC power supply 3, which is input from the two power supply lines 42 and 5 through the diodes 209 and 210.

  The impedance reduction circuit 205 prevents the waveform distortion of the AC voltage input to the voltage monitor unit 204 by reducing the impedance based on an instruction from the control unit 206. This point will be described later.

  The control unit 206 sends an operation instruction to the impedance reduction circuit 205, analyzes the waveform of the AC voltage detected by the voltage monitor unit 204, and is added to the AC voltage from the two-wire controller 1 and sent. Analyze and extract control information consisting of digital information. Then, based on the extracted control information, setting and driving for the load are performed via the driving unit 207.

  The drive unit 207 sets and drives the load 208 based on the drive signal from the control unit 206.

  Next, the operation of the two-wire control device 1 shown in FIG. 2 will be described with reference to the waveform diagram of FIG.

  FIG. 4 (b) shows the waveform of the AC voltage V0 by the commercial AC power supply 3, in other words, the voltage waveform between points A and C (waveform between A and C), FIG. 4 (b) shows the load device 2 Shows a voltage waveform between two power lines 42 and 5 input to the circuit, in other words, a voltage waveform between point B and point C (waveform between B and C), FIG. FIG. 4 shows a voltage waveform (waveform between A and B) between the power supply lines 41 and 42 on both sides of 1; FIG. 4 (d) shows a switching portion sent from the control unit 102 to the drive unit 105 in FIG. 10 is a waveform diagram of a control signal for turning on and off the switch 101. FIG.

  Assuming that the conduction angle in every half cycle of AC voltage V0 is 0 degree to 180 degrees, as shown in FIG. 4 (b), in this embodiment, in a certain period of conduction angles 90 degrees to 180 degrees in every half cycle By turning off the switching unit 101, part of the AC voltage V0 from the commercial AC power supply 3 input to the load device 2 is shut off. Specifically, it is blocked for a fixed period from timing T1 at which the conduction angle slightly exceeds 90 degrees to timing T3 at the conduction angle 180 degrees. The cutoff period is composed of period 2 (second period) of the previous stage from timing T1 to T2 and period 1 (first period) of the latter stage from timing T2 to T3.

  When the switching unit 101 is turned off, the AC voltage V 0 in the interrupted period in every half cycle is input to the power supply unit 103 via the diodes 108 and 109. That is, as shown in FIG. 4 (C), the voltage V1 is generated only during the period 1 and the period 2 between the points A and B. The power supply unit 103 uses power (indicated by hatching in FIG. 4C) of the voltage of the portion corresponding to the period 1 of the voltage V1 as power supplied to the control unit 102. For this reason, as the period 1, a constant period which can secure a necessary amount of power for the control unit 102 is set.

  In addition, when the switching unit 101 is turned off, the AC voltage V0 in the interrupted period in every half cycle is also input to the voltage monitoring unit 104 via the diodes 110 and 111, and the voltage monitoring unit 104 measures time T3 at a conduction angle of 180 degrees. Detects the zero crossing of

  The control unit 102 outputs a pulse waveform as shown in FIG. 4 (D), which rises with the time point of the zero cross detected by the voltage monitor unit 104 as a start, as the control signal S1 of the drive unit 105. In response to the control signal S1, the drive unit 105 outputs a drive signal such that the switching unit 101 is turned on when the control signal S1 is at H level and is turned off when the control signal S1 is at L level, thereby driving the switching unit 101. Do.

  Further, the control unit 102 sets the falling of the control signal S1 to the start time point T1 of period 2 as indicated by a solid line in FIG. 4D or the end point T2 of period 2 as indicated by a broken line in FIG. Control signal S1 is generated. When the fall of the control signal S1 is set to the start time of period 2, the switching unit 101 is turned off at the start time T1 of period 2, so the AC voltage V0 waveform input to the load device 2 is as shown in FIG. As shown by the solid line, the waveform is cut off from the start time point T1 of the period 2 to the timing T3 of the conduction angle 180 degrees. Therefore, in period 2, the AC voltage V0 input to the load device 2 does not exist.

  On the other hand, when the fall of the control signal S1 is set to the end point T2 of the period 2 as shown by the broken line in FIG. 4D, the switching unit 101 is turned off at the end point T2 of the period 2 As indicated by a broken line in FIG. 4 (b), the AC voltage V0 input to 2 has a waveform cut off from the end time point T2 of the period 2 to the timing T3 of the conduction angle 180 degrees. Therefore, in period 2, the AC voltage V0 input to the load device 2 is present.

  As described above, by changing the fall timing of the control signal S1, the AC voltage V0 input to the load device 2 is present or absent in the period 2. The load device 2 determines that the digital information is "1" when the AC voltage V0 is present in the period 2, and determines that the digital information is "0" when it is not present.

  That is, period 2 is used as a period for creating digital information, and control unit 102 changes the timing of the fall of control signal S1 to drive unit 105 in every half cycle to generate AC voltage V0 in period 2. Change the presence or absence and add digital information.

  FIG. 5 (A) (B) shows a specific example in the case where control information consisting of digital information is added to the AC voltage V0 by the commercial AC power supply 3. As shown in FIG. 5A and 5B each show the waveform of the AC voltage V0 between the two power lines 42 and 5 input to the load device 2 (waveform between B and C). The left side of each drawing shows the time of normal operation, and the right side shows the waveform when the control device is added to make the load device 2 execute setting corresponding to the control information (indicated as setting).

  In the example of FIG. 5A, in the normal operation, the switching unit 101 is turned off at the end time T2 of the period 2 and turned on at the conduction angle 180 degrees (the end time of the period 1) T3. Accordingly, the AC voltage V0 input to the load device 2 is also blocked at the end time point T2 of the period 2 and falls, and has a waveform that becomes conductive at the time point T3 of the conduction angle of 180 degrees.

  On the other hand, when adding digital information “0” at the setting time, the switching unit 101 is turned off at the start time point T1 of the period 2 and turned on at the time point T3 of the conduction angle 180 degrees. In response to this, the AC voltage V0 input to the load device 2 is also blocked at the start time point T1 of the period 2 and falls, and has a waveform which becomes conductive at the time point T3 of the conduction angle 180 degrees. That is, no voltage is present in period 2 and the load device determines that it is “0”. When digital information “1” is added, the switching unit 101 is turned off at the end time T2 of the period 2 and turned on at the time T3 at a conduction angle of 180 degrees. In response to this, the AC voltage V0 to the load device 2 is also cut off at the end time point T2 of the period 2 and falls, and the waveform becomes conductive at the time point T3 of the conduction angle 180 degrees. That is, a voltage is present in period 2 and the load device 2 determines “1”. Then, by adding “0” or “1” every half cycle according to the setting content to be executed by the load device 2, control information including a plurality of digital information is transmitted to the load device 2. After transmission of control information (after completion of setting by the load device 2), the process returns to normal operation on the left side again.

  In the example of FIG. 5 (b), in the normal operation, the switching unit 101 is turned off at the start time T1 of period 2 and turned on at the time of conduction angle 180 degrees (end time of period 1) T3. Accordingly, the AC voltage V0 input to the load device 2 is also blocked at the start time point T1 of the period 2 and falls, and has a waveform which becomes conductive at the time point T3 of the conduction angle of 180 degrees.

  On the other hand, when digital information “1” is added at the setting time, the switching unit 101 is turned off at the end time point T2 of the period 2 and turned on at the time point T3 of the conduction angle 180 degrees. In response to this, the AC voltage V0 input to the load device 2 is also blocked at the end time point T2 of the period 2 and falls, and has a waveform which becomes conductive at the time point T3 of the conduction angle 180 degrees. That is, a voltage is present in period 2 and the load device determines that it is "1". When digital information “0” is added, the switching unit 101 is turned off at the start time T1 of the period 2 and turned on at the time T3 at a conduction angle of 180 degrees. In response to this, the AC voltage V0 to the load device 2 is also cut off at the start time point T1 of the period 2 and falls, and the waveform becomes conductive at the time point T3 of the conduction angle 180 degrees. That is, no voltage is present in period 2 and the load device 2 determines “0”. Then, by adding “0” or “1” every half cycle according to the setting content to be executed by the load device 2, control information including a plurality of digital information is transmitted to the load device 2. After transmission of control information (after completion of setting by the load device 2), the process returns to normal operation on the left side again.

  Note that (0) (1) displayed in FIG. 5 (i) (ii) indicates whether “0” or “1” of the digital information is added to the half cycle. Further, the timing at which the load device 2 extracts control information from the AC voltage V0 is, for example, digital information determined in advance such as "000111" as an extraction start signal, and a plurality of digital information following the extraction start signal It may be decided in advance between the two-wire control device 1 and the load device 2 so as to extract as the control information.

  In the example of FIGS. 5A and 5B, each half cycle has the same waveform voltage in the normal operation, and the control information is added with the waveform in each half cycle different in setting, but in the normal operation Even every half cycle may form different waveforms. However, only when setting by control information is necessary on the load device 2 side, if the waveform of each half cycle is made different, the time for processing of adding control information by the control unit 102 may be short, and power consumption may be reduced accordingly. It can be reduced.

  In addition, although any pattern of FIG. 5 (A) and (B) may be applied, the condition of FIG. And harmonics can be suppressed.

  Next, the operation of the load device 2 shown in FIG. 3 will be described.

  The AC voltage V0 input to the load device 2 is rectified by the rectifier circuit 201, smoothed by the smoothing capacitor 202, and supplied to the load 208 driven by the drive unit 207.

  Further, the AC voltage V0 is also input to the power supply unit 203, and a part thereof is used as power supply power of the control unit 206.

  Further, the value of the AC voltage V 0 is detected by the voltage monitor 204, and the detection result is sent to the control unit 206.

  The control unit 206 determines the presence or absence of the AC voltage V0 in the period 2 every half cycle based on the value of the AC voltage V0 detected by the voltage monitor 204 to determine digital information, and determines a plurality of predetermined digital information Extract the combination as control information. Then, according to the extracted control information, the load such as setting of setting values is controlled via the drive unit 207.

  Further, the control unit 206 causes the impedance reduction circuit 205 to operate as follows. That is, as described above, when the switching unit 101 of the two-wire control device 1 is turned off, as shown in FIG. Alternatively, although it is cut off at the end time point T2, the falling of the waveform at the time of cut off does not become steep due to the impedance of the load device 2 and distortion 300 occurs as shown in FIG. For this reason, the control unit 207 of the load device 2 can not determine the presence or absence of the voltage in the period 2 with high accuracy, and the digital information may not be accurately read. In particular, in the case where the circuit configuration of the load device 2 is a circuit configuration in which charging of the capacitor is completed by a capacitor input circuit or the like and the impedance is high (including the case where a power factor improving circuit is present), distortion 300 particularly occurs. Cheap.

  Therefore, the control unit 206 of the load device 2 outputs the drive signal S2 that becomes H level from the start time point T1 of the period 2 to the time point T3 of the conduction angle 180 degrees as shown in FIG. To lower the impedance of the load device 2. Due to the drop in the impedance of the load device 2, as shown in FIG. 2A, the distortion at the time of interruption of the AC voltage V0 is suppressed and the fall becomes sharp. For this reason, the presence or absence of the voltage in the period 2 and consequently the analysis and extraction of the control information can be performed with high accuracy. Since the start time point T1 of period 2 which is the drive timing of the impedance reduction circuit 205 is a preset timing, the information may be given to the control unit 206 of the load device 2 in advance.

  Further, in this embodiment, the impedance lowering circuit 205 is operated from the start time T1 of period 2 to the time T3 of conduction angle 180 degrees, but at least from the start time T1 to the end time T2 of period 2 good.

  When operating the impedance reduction circuit 205, a current from the AC voltage V0 flows in the impedance reduction circuit 205. Therefore, as an addition aspect of the control information, a voltage is present in the period 2 (FIG. 5A). It is more desirable in FIG. 5 (b), which does not exist, because the current flowing through the impedance reduction circuit 205 can be reduced and the loss can be reduced.

  As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment. For example, although period 2 for creating digital information “1” “0” is set earlier than period 1 for securing power, period 1 may be set earlier.

Reference Signs List 1 2-wire control device 2 load device 3 commercial AC power supply 4, 5, 41, 42 power supply line 101 switching unit 102 control unit 103 power supply unit 104 voltage monitor unit 105 drive unit 203 power supply unit 204 voltage monitor unit 205 impedance Lowering circuit 206 Control unit 208 Load

Claims (5)

A two-wire control device connected between a commercial AC power supply and a load device supplied with power from the commercial AC power supply,
A power supply unit that secures the power supply of the control device by interrupting the first period of the conduction angle of 90 degrees to 180 degrees in every half cycle of the alternating voltage by the commercial alternating current power supply;
The alternating current supplied from the commercial alternating current power supply to the load device according to the presence or absence of interruption of the second period excluding the first period which is interrupted to secure the power supply among the conduction angles of 90 degrees to 180 degrees in every half cycle Control information adding means for adding control information consisting of digital information to voltage;
And a controller.   The control device according to claim 1, wherein the control information adding means adds control information to an AC voltage only when setting the load device according to the control information, and does not add control information after setting is completed. The load device is an LED lighting device,
The control device according to claim 1, wherein the control information is information for setting at least one of dimming and toning of the lighting device.   A load device which receives power supply from the commercial AC power supply via the control device according to any one of claims 1 to 3, and reduces the impedance to the input of at least the second period of the AC voltage. A load device comprising an impedance reduction circuit for causing   The control system provided with the control apparatus in any one of Claims 1-3, and the load apparatus of Claim 4.

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