JP2009277500A - Power-saving device of high-pressure discharge lamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power-saving device capable of saving intentionally as well as easily a power consumption of a high pressure discharge lamp, such as, mercury lamp and sodium-vapor lamp which does not cause condition of lighting failure. <P>SOLUTION: The power-saving device 1 is provided with a power-saving unit 11 arranged close to a discharge lamp 2 and a wireless remote controller 21 to be carried by a maintenance worker of a lighting equipment. The power-saving unit 11 is provided with a setting circuit 12 for setting a power-saving ratio, a power adjustment circuit 13 with a switching element 17, a power measuring circuit 14 for measuring an actually consumed power, a sending/receiving circuit 15, and a controlling circuit 16. The wireless remote controller 21 is provided with an input portion 22 and a sending/receiving circuit 23, the power-saving ratio is set on the setting circuit 12 by wireless communication. The controlling circuit 16, based on the power-saving ratio and the measured power value, controls a conduction timing of the switching element 17 by a phase zone excluding a peak portion of a voltage waveform. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a power saving device for reducing power consumption of a high pressure discharge lamp such as a mercury lamp or a sodium lamp.

2. Description of the Related Art Conventionally, power saving devices that use a transformer to lower the power supply voltage are known. For example, in the power saving device 51 illustrated in FIG. 4, the control circuit 52 selectively operates the plurality of electromagnetic contactors 53 </ b> A to 53 </ b> C to switch the tap voltage of the transformer 54. When power is not saved, the direct contact electromagnetic contactor 53A is turned on, and the high-pressure discharge lamp 55 is lit in the all-light state. When performing power saving, the power saving electromagnetic contactor 53B or 53C is turned on, the power supply voltage is stepped down, and the power consumption of the discharge lamp 55 is reduced. Patent Document 1 describes a mercury lamp power saving device provided with this type of transformer.
JP 2007-287638 A

However, the conventional power saving device 51 has the following problems.
(A) Although power consumption can be reduced by stepping down the power supply voltage, the amount of saving varies depending on the new and old of the tube and the size of the capacity, so even if the power saving effect can be found by subsequent power measurement, It was difficult to predict accurately. For this reason, especially in large-scale lighting facilities such as roads and exhibition halls using a large number of discharge lamps 55, planned power saving cannot be performed.

(B) As shown in FIG. 5, power saving by the transformer 54 lowers the peak value of the input voltage (power supply voltage) to generate the output voltage, so that the output voltage is too low when the power supply voltage is not stable. As a result, the operation of the discharge lamp became unstable, and flicker and non-lighting were likely to occur.

(C) Most mercury lamps and sodium lamps are installed in relatively high places such as street poles and ceilings of buildings. Therefore, when the power saving device 51 is installed near the discharge lamp 55, the high place is used for adjusting the amount of saving. When the work is forced and the power saving device 51 is installed away from the discharge lamp 55, it is necessary to lay a long control line.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a power saving device that can systematically and easily save the power consumption of a high-pressure discharge lamp without any lighting failure.

  In order to solve the above problems, the present invention is characterized in that the following means is employed in an apparatus for reducing the power consumption of a high-pressure discharge lamp such as a mercury lamp or a sodium lamp.

(1) A setting circuit that sets a power saving rate, a power adjustment circuit that includes a switching element that partially cuts the voltage waveform of the AC power supply, and a power measurement circuit that measures the actual power consumption of the high-pressure discharge lamp And a control circuit for controlling the conduction timing of the switching element based on the power saving rate and the measured value.

(2) A power saving device for a high pressure discharge lamp, wherein the control circuit controls the conduction timing of the switching element in a phase section excluding a peak portion of the voltage waveform.

(3) A power saving device for a high pressure discharge lamp, comprising a remote control means for setting a power saving rate in a setting circuit by wireless communication.

  According to the power-saving device of the present invention, the actual power consumption of the high-pressure discharge lamp is measured and the switching element of the power adjustment circuit is controlled. Therefore, regardless of whether the tube is new or old and the capacity is large or small, The power can be saved accurately according to a preset power saving rate, and there is an effect that planned power saving can be performed.

  In particular, since the switching element conducts at a phase other than the peak portion of the voltage waveform, it is possible to save power without lowering the peak value of the power supply voltage, and to reliably prevent lighting failure of the high-pressure discharge lamp.

  Further, by using the remote control means, there is an advantage that the power saving rate can be easily adjusted by wireless communication regardless of the installation location of the high pressure discharge lamp.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram functionally showing a power saving device of a high pressure discharge lamp. FIG. 2 is a flowchart showing the operation of the power saving apparatus. FIG. 3 is a waveform diagram illustrating a voltage waveform output from the power adjustment circuit of the power saving device.

  As shown in FIG. 1, the power saving device 1 includes a power saver 11 installed in the vicinity of a high-pressure discharge lamp 2 such as a mercury lamp or a sodium lamp (for example, inside a switchboard), and a wireless remote controller carried by an administrator of the lighting equipment. 21. The power saver 11 includes a setting circuit 12 that sets the power saving rate of the discharge lamp 2, a power adjustment circuit 13 that adjusts the power of the AC power supply 3, a power measurement circuit 14 that measures the power consumption of the discharge lamp 2, A transmission / reception circuit 15 that communicates with the wireless remote controller 21 and a control circuit 16 that controls the entire apparatus are provided. The wireless remote controller 21 is a remote operation means operated by an equipment manager, and includes an input unit 22 and a transmission / reception circuit 23.

  The power adjustment circuit 13 is provided with a switching element 17 such as a triac and cuts a part of the voltage waveform of the AC power supply 3. The power measurement circuit 14 is provided on the output side of the power adjustment circuit 13, constantly measures the actual power consumption of the discharge lamp 2, and feeds back measurement data to the control circuit 16. The wireless remote controller 21 sets the power saving rate input by the facility manager through the input unit 22 in the setting circuit 12 of the power saver 11 by wireless communication. The setting circuit 12 outputs power saving rate data to the control circuit 16, and the control circuit 16 is configured to control the conduction timing (phase) of the switching element 17 based on the power saving rate data and the measurement data.

  Next, the operation of the power saving device 1 will be described. As shown in FIG. 2, when the high-pressure discharge lamp 2 is turned on, first, the switching element 17 is turned off (S1), and the power measurement value at the start is controlled as the maximum power consumption with the power saving stopped. Store in the memory of the circuit 16 (S2). When the lighting state of the discharge lamp 2 is stabilized (S3), next, the power saving rate is read (S4), and the power saving target value is calculated by multiplying the maximum power consumption by the saving rate (S5). Subsequently, the switching element 17 is turned on (S6), the current power consumption of the discharge lamp 2 is measured (S7), and the phase of the switching element 17 is controlled so that the measured value becomes a target value (S8) ( S9). Then, a series of power saving processes are repeated until the power of the discharge lamp 2 is turned off (S10).

  In the phase control, the control circuit 16 causes a current corresponding to the difference between the measured value and the target value to flow through the gate of the switching element 17, and, as shown in FIG. 17 conduction timing is controlled. Then, between the zero cross point and the conduction point, the voltage waveform is cut every half cycle to reduce the voltage to 0 V, and the power corresponding to the area of the cut section (area indicated by hatching) is saved. In this way, since the conduction timing of the switching element 17 changes according to the actual measured power value, a power of some% of the maximum power consumption is set in advance for each discharge lamp 2 regardless of whether the tube is new or old or the capacity is large or small. Save exactly as you saved.

  Therefore, according to the power saving device 1 of this embodiment, in particular, in a large-scale lighting facility in which a large number of discharge lamps 2 are installed, the total power saving effect is accurately predicted, and power saving suitable for the energy saving plan is performed. be able to. In addition, the facility administrator can easily adjust the power saving rate of a large number of discharge lamps 2 installed at a high place by wireless communication using the wireless remote controller 21. In addition, since the switching element 17 conducts at a phase other than the peak portion of the voltage waveform, power can be saved without lowering the peak value of the power supply voltage, and the discharge lamp 2 is always lit in a stable state, It is also possible to reliably prevent non-lighting.

  The present invention is not limited to the above embodiment. For example, a personal computer is used as a remote control means, and the ON / OFF of the discharge lamp and the power saving rate distributed in various places are collectively collected from the facility management room. It is also possible to implement the power saving system by appropriately changing the configuration of the power saving system without departing from the gist of the present invention, such as being configured to be set.

It is a block diagram of a power-saving device showing one embodiment of the present invention. It is a flowchart which shows operation | movement of this power saving apparatus. It is a voltage waveform diagram which shows the effect | action of this power saving apparatus. It is a block diagram which shows the conventional power saving apparatus. It is a wave form diagram which shows the effect | action of the conventional power saving apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Power saving apparatus 2 High pressure discharge lamp 11 Power saver 12 Setting circuit 13 Power adjustment circuit 14 Power measurement circuit 16 Control circuit 17 Switching element 21 Wireless remote control

Claims (3)

A device that reduces the power consumption of high-pressure discharge lamps such as mercury lamps and sodium lamps,
A setting circuit that sets the power consumption saving rate, a power adjustment circuit that includes a switching element that partially cuts the voltage waveform of the AC power supply, a power measurement circuit that measures the actual power consumption of the high-pressure discharge lamp, A power-saving device for a high-pressure discharge lamp, comprising: a control circuit that controls conduction timing of a switching element based on a power-saving rate and a measured value.   2. The power saving device for a high pressure discharge lamp according to claim 1, wherein the control circuit controls the conduction timing of the switching element in a phase section excluding a peak portion of the voltage waveform.   The power saving device for a high pressure discharge lamp according to claim 1 or 2, further comprising remote control means for setting the power saving rate in the setting circuit by wireless communication.

Images