JP2007095928A - Light emitting circuit for solar simulator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an innovative solar simulator capable of measuring characteristics of a solar cell that is slow in response, that is, it takes a long time to reach a rated output, and can realize high accuracy of measurement. Providing a light emitting circuit.
A light emitting circuit of a xenon lamp 4 serving as a light source of a solar simulator that applies a potential that breaks an electrical insulation state between electrodes from the outside of a glass tube, and a potential that breaks an electrical insulation state between electrodes. A first power source 1 for generating a trigger pulse voltage to be output, and a second power source for outputting a potential for inducing main discharge from a dielectric breakdown state between the electrodes immediately after applying a potential for breaking the electrical insulation state between the electrodes. 2 and a third power source 3 capable of maintaining a potential obtained from the electrical resistance in the tube in the xenon lamp 4 and the current value of the main discharge after the main discharge is started, and maintaining the current of the main discharge. Configured.
[Selection] Figure 2

Description

  The present invention relates to a light emitting circuit for a solar simulator that emits light from a light source lamp as simulated sunlight in order to measure output characteristics of a solar cell.

  The importance of solar cells as a clean energy source has been recognized and the demand has increased, and the demand in various fields has increased from the power energy source of large devices to small power sources in the field of precision electronics. Yes.

  In order for a solar cell to be widely used in various fields, various inconveniences are expected on the side of using the solar cell unless the characteristics of the battery, particularly the output characteristics, are measured accurately. For this reason, conventionally, a pseudo-sunlight irradiation device (hereinafter referred to as a solar simulator) for measuring the output characteristics of a solar cell has been proposed and put into practical use.

  When measuring the output characteristics of a solar cell using such a solar simulator, there are cases where it takes a long time for the solar cell to reach a predetermined output after irradiating the lighting light of the light source lamp. For example, a special single crystal solar cell or a thin film solar cell takes about 10 times as long to reach a predetermined output as compared to a polycrystalline silicon solar cell. On the other hand, there is also a demand for higher accuracy in measuring the output characteristics of solar cells. Under such circumstances, the light source lamp of the solar simulator is required to continuously emit light with stabilized illuminance of several hundred milliseconds to several seconds.

  By the way, a light emitting circuit of a conventional xenon lamp as shown in FIG. 9 is used as an example. That is, this light emitting circuit has a power source B mainly composed of a trigger pulse generating circuit that outputs a potential that breaks the electrical insulation state between the electrodes of the xenon lamp XL, and a potential that breaks the electrical insulation state between the electrodes. The power source A is configured to output a potential for inducing main discharge from the dielectric breakdown state between the electrodes immediately after being applied, and the capacitor C1 stored by the power source A.

However, the power source A is generally one having a maximum output possible current of several hundred mA to several A, and the discharge current accompanying the main discharge is supplied exclusively from the capacitor C1.
Therefore, the time during which the lamp XL emits light depends on the capacitance of the capacitor C1, but the potential for inducing main discharge from the dielectric breakdown state between the electrodes is, for example, in the case of a xenon lamp having a distance between the discharge electrodes of about 1000 mm. , A potential of about 2000V to 3000V is required.

In view of the above circumstances, the selection of the capacitor C1 is required to have a suitable withstand voltage performance, but a commercially available capacitor satisfying such a withstand voltage generally has a value of several μF to several tens μF. When this is used, the light emission can be maintained only for about 1 msec. Further, when the capacitor C1 is discharged, the amount of light emitted from the lamp changes depending on the voltage fluctuation accompanying the discharge curve of the capacitor C1 (see FIG. 8), so that a stable light amount cannot be obtained. For this reason, when measuring a solar cell, the present condition is that the test is performed by emitting light of several tens to 130 times for one solar cell.
As a result, there are problems such as fluctuations in measured values due to fluctuations in the amount of emitted light for a plurality of times of light emission, and measurement time for one solar cell cannot be shortened.

  On the other hand, a light emitting circuit for causing a light source xenon lamp to emit light for a long time is also known. 10 and 11 show examples of the configuration. That is, in the light emitting circuits of FIGS. 10 and 11, the main discharge voltage supply source is configured as a large-scale and large-capacity power source A for long-time light emission, but the light source lamp is, for example, between the discharge electrodes. A xenon lamp with a distance of about 1000 mm requires a potential of about 2000 V to 3000 V, and a current of about 30 A flows through the main discharge. Since a power source satisfying such high potential and large current specifications requires a large power source of about 60 KW to 90 KW, there is a problem that the solar simulator is increased in size and the apparatus cost is increased.

  As described above, a technique for causing a xenon lamp to emit light for a long time is a patent in the field of solar simulators as a means for solving the problem that the output time of a solar cell cannot be accurately measured due to the short emission time of a discharge lamp in a solar simulator. It has been proposed in Document 1 and Patent Document 3, and in Patent Document 2 in the field of a photographic illumination device.

  In Patent Document 1, a solar simulator that sets a time for supplying a high current from a state in which the lamp continues to be lit at a current lower than the rated current and supplies a current exceeding the rated current at the time of measurement to secure 1 SUN for a certain time. There has been proposed a light-emitting circuit composed of one power source and a starter (high voltage generator). However, in this proposed technology, even when the lamp does not emit light, half the current of the lamp is constantly flowing, so not only the power is consumed at all times, but the optical components are always in a heat generating state, so that the life of the lamp is reduced. There's a problem.

  Patent Document 2 proposes a light-emitting circuit including a lighting circuit incorporating a continuous lighting circuit and a circuit for instantaneous light emission in the field of photography. Continuous light emission by this technology is intended for light with weak modeling lamp light because its use is for photography. However, when measuring the output characteristics of a large and slow responsive solar cell using a solar simulator, it is necessary to emit light with a high output for a long time. To meet this demand, it is necessary to increase the power capacity. Therefore, there is a problem that the power supply becomes huge.

On the other hand, Patent Document 3 proposes means for simplifying power transmission and distribution equipment and suppressing noise generation by adding a discharge pulse current and a peak value control circuit for a pulse current during non-irradiation to the circuit configuration of Patent Document 1. Yes. However, as in the technique of Patent Document 1, half of the lamp rating continues to flow even when the lamp does not emit light. Therefore, not only the power is constantly consumed, but the optical components are always in a heat generating state. The problem in terms of life is not solved.
Japanese Examined Patent Publication No. 6-105280 Japanese Patent No. 2772803 Japanese Patent No. 2886215

  In view of the above-mentioned various problems in the light emitting circuit in the conventional solar simulator, the present invention can not only solve all these problems, but also has a slow response as a solar simulator, that is, reaches a rated output. It is an object of the present invention to provide a revolutionary solar simulator light emitting circuit capable of measuring characteristics of a solar cell that takes a long time to perform, and further realizing high measurement accuracy.

  The configuration of the light emitting circuit of the present invention, which has been made for the purpose of solving the above problems, is a light emitting circuit of a xenon lamp that is a light source of a solar simulator that applies a potential that breaks an electrical insulation state between electrodes from the outside of a glass tube. A first power source that generates a trigger pulse voltage that outputs a potential that breaks the electrical insulation state between the electrodes, and a dielectric breakdown state between the electrodes immediately after the potential that breaks the electrical insulation state between the electrodes is applied A second power source for outputting a potential for inducing main discharge from the main body, and maintaining the potential obtained from the electric resistance in the tube in the xenon lamp and the current value of the main discharge after the main discharge is started. And a third power source capable of maintaining the current of 1.

  As a light emitting circuit of the present invention that can solve the above-mentioned problems, a light emitting circuit of a xenon lamp that is a light source of a solar simulator that applies a potential that breaks an electrical insulation state between electrodes from the outside of a glass tube is used. A main discharge is generated from a first power source that generates a trigger pulse voltage that outputs a potential that breaks the electrical insulation state, and a dielectric breakdown state between the electrodes immediately after applying a potential that breaks the electrical insulation state between the electrodes. The second power supply function that outputs the induced potential, and the potential determined from the electrical resistance in the tube in the xenon lamp and the current value of the main discharge after the main discharge is started, There is also a thing characterized by having comprised by the combined power supply which combined the capacitor | condenser which has the 3rd power supply function which can be maintained, and the stabilization power supply which charges this.

  As the third power source of the light emitting circuit of the present invention, a stabilized power source can be used. A capacitor such as an electric double layer capacitor (capacitor) can be used as the stabilized power source.

  The light emitting circuit of the present invention can include a current control circuit or a voltage control circuit for the xenon lamp.

Further, in the light emitting circuit having the above configuration, the light amount sensor is arranged for the xenon lamp, and the control signal is controlled by feeding back a detection signal from the sensor to the current control circuit or the voltage control circuit, The light quantity of the lamp can be stabilized.
In the configuration according to the present invention, even if the light emission is maintained for a required time after the start of the main discharge, there is enough charge to supply current from the third power source to the lamp. Provided.

  In the present invention, a light emission circuit of a xenon lamp in a light source device of a solar simulator for measuring output characteristics of a solar cell includes a first power source that generates a trigger pulse voltage for performing initial dielectric breakdown, and a main light emission discharge in the lamp. The power supply device that continuously emits light can be made compact by comprising the second power supply that applies a voltage for starting the lamp and the third power supply that applies a voltage for maintaining the target light quantity by the main light emission discharge to the lamp. This effect can also be obtained by another configuration of the light emitting circuit of the present invention in which the second power supply function and the third power supply function are combined into one power supply.

  In the present invention, a stabilized power source and a capacitor are used as the third power source of the light emitting circuit, so that the power source device is further reduced in size and the xenon lamp is stabilized for several hundred milliseconds to several seconds with the light quantity stabilized. Of continuous light emission. This makes it possible to measure the output of a solar cell with a slow response.

  Further, in the present invention, a capacitor is used as the third power source of the light emitting circuit, and a current control circuit and a voltage control circuit are used. A light amount sensor is added to the xenon lamp, and a light amount signal detected by the sensor is converted to the current control circuit or By feeding back to the voltage control circuit, the amount of light can be controlled to be constant with good responsiveness, and the measurement accuracy of the solar simulator can be improved.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a waveform diagram showing a change in lamp voltage during light emission of a xenon lamp according to the present invention, and FIG. 2 is a block diagram for explaining the first and second embodiments of the light emission circuit of the xenon lamp according to the present invention. 3 is a block diagram for explaining a third embodiment of a light emitting circuit of a xenon lamp according to the present invention, FIG. 4 is a block diagram for explaining a fourth embodiment of a light emitting circuit of a xenon lamp according to the present invention, and FIG. FIG. 6 is a block diagram for explaining a sixth example of the light emitting circuit of the xenon lamp according to the present invention, and FIG. 7 is a block diagram for explaining the sixth example of the light emitting circuit of the xenon lamp according to the present invention. FIG. 8 is a waveform diagram schematically illustrating a change in lamp voltage in a light emitting circuit of a conventional xenon lamp, 9 to 11 is a block diagram illustrating a light emission circuit of a conventional xenon lamp, respectively.

  First, Embodiment 1 of the light emitting circuit of the present invention will be described with reference to FIG. Reference numeral 1 denotes a power supply circuit provided with a trigger pulse generating circuit 1a for generating a voltage for initial dielectric breakdown on the secondary side of the transformer 1b with respect to the xenon lamp 4, and is a first power supply of the light emitting circuit of the present invention. A second power source 2 is a DC power source B that generates a voltage that causes the xenon lamp 4 to start discharging for main light emission. A third power source 3 is a DC power source A that generates a voltage for causing the xenon lamp 4 to maintain a discharge with a target light amount. Here, the illustrated xenon lamp 4 may have a shape in which a distance between discharges is 100 mm or more and a potential for breaking an electrical insulation state between electrodes can be applied from the outside of the glass tube. In FIG. 2, d1 and d2 are backflow prevention elements (diodes).

Next, the second power source 2 by the DC power source B and the third power source 3 by the DC power source A will be described. The second power supply 2 supplies a potential necessary for inducing main discharge from the dielectric breakdown state. However, the main discharge is performed by the third power source 3. The second power source 2 can be reduced in capacity by using a capacitor to store charges. The third power source 3 by the DC power source A for maintaining the main discharge in the xenon lamp 4 is output as compared with the second power source 2 by the DC power source B that outputs a potential for causing the lamp 4 to induce the main discharge from the dielectric breakdown state. Is low voltage. Therefore, the power supply capacity is smaller than that of the prior art (FIGS. 10 and 11).
For example, in the state where the secondary side of the transformer 1b connected to the known trigger pulse generating circuit 1a is opposed to the xenon lamp 4 having a distance between the discharge electrodes of about 300 mm, the lamp 4 is connected to the DC power source B as the second power source 2. The potential of the DC power source A as the third power source 3 is about 100V to about 400V, and the main discharge current is about 100A to 200A. In this case, the DC power source B as the second power source 2 has a short time of 1 msec or less from the dielectric breakdown state until the main discharge is induced. Therefore, a potential of up to 500 V is applied to a capacitor of about 10 μF having a withstand voltage of 500 V or more. A power supply capable of supplying is required.

  Incidentally, since the solar simulator provided with the circuit of the present invention sets a waiting time of several seconds or more for one lighting of the xenon lamp 4, for example, the charging time of the capacitor is several times compared with the discharging time of the capacitor. Since the output current can be ten times or more, the power supply of about several A may be used, for example, from the comparison of the waiting time and the light emission time. As an example, if the output current is 2 A, a small power supply of about 1 KW is sufficient. On the other hand, the DC power source A of the third power source 3 corresponds to a 10 KW power source when the voltage for maintaining the main discharge is 100 V when the output of 100 A is requested.

  On the other hand, in the conventional circuit configuration as shown in FIGS. 9 to 11, the power source B (corresponding to the second power source 2 of the present invention) in FIGS. 9 to 11 has a potential that induces the main discharge from the dielectric breakdown state. Since it is necessary to have both the performance to output and the performance to output the current of the main discharge, 500 V × 100 A = 50 kW, which is more than five times the capacity of the DC power source A as the third power source 3 in the above-described light source device of the present invention. Is required.

  In the present invention, as in the first embodiment, the light emission circuit of the xenon lamp 4 is replaced with a trigger pulse generation circuit (first power supply 1), and a power supply circuit (first power supply) that generates a voltage for starting discharge for main light emission. 2 power supplies 2) and a power supply circuit (third power supply 3) that generates a voltage for maintaining the target light quantity, each power supply circuit can be remarkably miniaturized to enable continuous light emission. In addition, the voltage variation of the xenon lamp 4 can be eliminated and the light quantity can be stabilized. Further, the light emitting circuit in the present invention only needs to be activated when the xenon lamp 4 is caused to emit light, and the light emitting circuit is not activated in any other state, so that the thermal load on the optical components in the solar simulator is reduced. It goes without saying that it can be suppressed as much as possible.

  Next, the operation of Embodiment 1 of the light emitting circuit of the xenon lamp 4 in the present invention described above will be described. First, the lighting start signal 10 is applied to the trigger pulse generation circuit 1a (first power supply 1). The lighting start signal 10 is input by a start signal output from a control device such as a personal computer in the case of an automatic operation such as a manual operation in which an operator operating a solar simulator pushes a start button or the like or an automatic operation or the like. .

  When the lighting start signal 10 is applied to the trigger pulse generating circuit 1a, a trigger pulse of several KV is applied to the outer periphery of the glass tube of the xenon lamp 4 from the secondary side of the output transformer 1b. This trigger pulse destroys the electrical insulation state between the electrodes 4a and 4b facing each other in the xenon lamp 4. Thereafter, the DC power supply B (second power supply 2) is activated, and a discharge standby voltage of about 450 V is applied between the electrodes 4a and 4b of the xenon lamp 4. As a result, an internal main discharge is induced, and the in-tube resistance of the xenon lamp 4 rapidly decreases from a state of several MΩ or more to several Ω or less (depending on the lamp). Thereafter, the DC power source A (third power source 3) is activated, and a discharge sustaining voltage of about 130 V is applied between the electrodes 4a and 4b of the xenon lamp 4. As a result, the main discharge is continued inside the xenon lamp 4 to continuously emit light with a predetermined light amount, and this is maintained for a required time (several hundred milliseconds to several seconds).

  In the second embodiment of the present invention, the DC power source A (third power source 3) of FIG. 2 is a stabilized power source. The operation is the same as that of the first embodiment described above. As the stabilized power source, a power source capable of outputting currents 100A to 200A with respect to voltages 100V to 400V is used. As a result, it is possible not only to make continuous light emission several hundred milliseconds to several seconds, but also to sufficiently measure the output of a solar cell that has a very slow response that requires time until a rated output is obtained.

  In Embodiment 3 of the present invention, the third power source in the previous embodiment is a direct current composed mainly of a charging power source 5 and a capacitor 6 (also referred to as an electric double layer capacitor 6) as illustrated in FIG. The power source A is the third power source 31. In addition, a current control circuit 7 is added to stabilize the amount of light when continuously emitting light. The current control circuit 7 is not particularly limited, and a known circuit can be used. Here, the capacitor 6 has a capacity of about several F. With this configuration, it is possible to emit light continuously for several hundred milliseconds to several seconds in a lighting cycle of about 15 seconds.

  In the example of FIG. 3, the capacitor 6 is used for the DC power source A (third power source 31), but the capacitor 6 can take out a current required for light emission of the xenon lamp 4 due to its low internal resistance. Therefore, the power supply device can be further reduced in size. In addition, since the internal resistance of the capacitor 6 is small, the heat generation of the capacitor 6 during light emission of the xenon lamp is small, and thus no auxiliary equipment for cooling the power supply is required, which contributes to further miniaturization of the power supply device.

  In Embodiment 4 of the present invention, as shown in FIG. 4, a second power source that outputs a potential for inducing main discharge from a dielectric breakdown state between electrodes immediately after applying a potential for breaking an electrical insulation state between the electrodes. The third power source 3 is capable of maintaining the potential obtained from the function 2 and the electric resistance in the tube in the xenon lamp and the current value of the main discharge after the main discharge is started, and maintaining the current of the main discharge. A combined power source 32 is formed by combining a capacitor 6 (electric double layer capacitor 6) having a function and a stabilized power source 5 for charging the capacitor 6 together.

As described above, the potential of the DC power source B (second power source 2) is about 400V to 500V with a known trigger pulse generation circuit connected to a xenon lamp having a distance between the discharge electrodes of about 300 mm. The potential of the power source A (third power source 3) is about 100V to 400V, and the main discharge current is about 100A to 200A. In this case, with respect to the DC power supply B (second power supply 2), the time from the dielectric breakdown state to inducing the main discharge is a short time of 1 msec or less. A power supply capable of supplying a potential is required.
Therefore, in the configuration of the fourth embodiment, as the electric double layer capacitor 6, a power supply of about 4F can be obtained at 600V by combining six capacitors having a capacity of about 100V at 25F in series. As a result, the functions of the second power supply 2 and the third power supply 3 can be shared by the single power supply 32, so that the power supply device can be further reduced in size. In the fourth embodiment, the current control circuit 7 is also arranged.

  In the fifth embodiment of the present invention, the DC power source A serving as the third power source 31 as shown in FIG. 5 is mainly composed of the charging power source 5 and the capacitor 6 as in the case of the example of FIG. However, in this example, a voltage control circuit 8 is added instead of the current control circuit 7 in the example of FIG. The voltage control circuit 8 is not particularly limited as in the case of the current control circuit 7, and a known circuit can be used. With this configuration, the same effect as in the third embodiment can be realized.

  In the sixth embodiment of the present invention, as illustrated in FIG. 6, the DC power source A (third power source 31) is composed of a charging power source 5 and a capacitor 6, as in the examples of FIGS. 4 and 5. However, a light amount sensor 9 for detecting the light amount of the xenon lamp 4 is added to the circuit including the current control circuit 7 shown in the third embodiment. Here, the detection signal from the light quantity sensor 9 can be fed back to the current control circuit 7 to further enhance the stabilization of the light quantity. The light amount sensor 9 is not particularly limited as long as it has a function of detecting the amount of light from the xenon lamp 4. As an example, a solar battery cell can be used. Note that the current control circuit 7 in the fifth and fifth embodiments may be disposed on the anode side of the xenon lamp 4.

  The seventh embodiment of the present invention is the same as the examples of FIGS. 4 to 6 in that the DC power source A (third power source 31) is composed of the charging power source 5 and the capacitor 6 as illustrated in FIG. However, here, a light amount sensor 9 for detecting the light amount of the xenon lamp 4 is added to the circuit including the voltage control circuit 8 of the fifth embodiment. The detection signal from the light amount sensor 9 can be fed back to the voltage control circuit 8 to achieve the same effect as in the sixth embodiment. 2 to 7, reference numeral 33 denotes a device that interrupts the circuit, for example, an open / close switch, d1 to d3 are backflow prevention elements (diodes), R is a resistor, and C is a capacitor.

The present invention is as described above, and a first power supply mainly having a trigger pulse generation circuit as a light emission circuit of a xenon lamp serving as a light source of a solar simulator, a second power supply acting as a discharge standby voltage generation circuit, and Since the basic configuration is to divide and form the third power source that functions as a discharge sustaining voltage generating circuit, the following effects can be obtained and it is extremely useful as a light emitting circuit for a solar simulator.
(1) A power supply having a capacity necessary for allowing a xenon lamp to emit light continuously for a long time can be made much smaller than the conventional technology.
(2) Even when the xenon lamp emits light continuously, the amount of light can be maintained stably. Therefore, it is possible to increase the accuracy of the measurement of the output characteristics of the solar cell by the solar simulator.
(3) Since the xenon lamp can emit light continuously, the output characteristics can be measured with sufficiently high accuracy even with a solar cell with slow response.
(4) By using a capacitor (electric double layer capacitor) as the power source, it is possible to further reduce the size of the power source with the required capacity. Further, even if the light is continuously emitted, the internal resistance of the capacitor is small, so that heat generation is small in the power supply, and an auxiliary device such as a cooling device is not required in the power supply apparatus.
(5) Solar cells that are very slow in responsiveness can improve the lifetime of the xenon lamp itself because the xenon lamp can reliably measure the output characteristics by emitting light only once for a time of several hundred milliseconds to several seconds.
(6) Since the power supply can be remarkably reduced in size, the entire solar simulator can be saved.
(7) Since light is emitted only during measurement, it is not necessary to keep it on all the time, and optical components are less likely to deteriorate.

The wave form diagram which showed the change of the lamp voltage at the time of light emission of the xenon lamp in this invention light emission circuit. The block diagram for demonstrating Embodiment 1 and 2 of the light emission circuit of this invention. The block diagram for demonstrating the example 3 of a light emitting circuit of this invention. The block diagram for demonstrating the example 4 of a light emitting circuit of this invention. The block diagram for demonstrating the example 5 of a light emitting circuit of this invention. The block diagram for demonstrating the example 6 of a light emitting circuit of this invention. The block diagram for demonstrating the example 7 of a light emitting circuit of this invention. The wave form diagram which showed typically the change of the lamp voltage in the conventional light emission circuit. The block diagram of the 1st example of the conventional light emission circuit. The block diagram of the 2nd example of the conventional light emission circuit. The block diagram of the 3rd example of the conventional light emission circuit.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st power supply 1a Trigger pulse generation circuit 1b Transformer 2 2nd power supply (DC power supply B)
3,31 3rd power supply (DC power supply A)
32 Combined power supply 4 Xenon lamp 5 Charging power supply 6 Capacitor 7 Current control circuit 8 Voltage control circuit 9 Light quantity sensor 10 Lighting start signal

Claims (6)

  A trigger pulse voltage that outputs a potential to destroy the electrical insulation state between the electrodes in the light emission circuit of a xenon lamp that is a light source of a solar simulator that applies a potential that breaks the electrical insulation state between the electrodes from outside the glass tube A first power source that generates a voltage, a second power source that outputs a potential that induces a main discharge from a dielectric breakdown state between electrodes immediately after applying a potential that breaks an electrical insulation state between the electrodes, and a main discharge starts And a third power source capable of maintaining the potential determined from the electric resistance in the tube in the xenon lamp and the main discharge current value and maintaining the main discharge current. Light emitting circuit.   The light emitting circuit for a solar simulator according to claim 1, wherein a stabilized power source is used as the third power source.   The light emitting circuit for a solar simulator according to claim 1 or 2, wherein a capacitor is used as the third power source.   A trigger pulse voltage that outputs a potential to destroy the electrical insulation state between the electrodes in the light emission circuit of a xenon lamp that is a light source of a solar simulator that applies a potential that breaks the electrical insulation state between the electrodes from outside the glass tube A second power supply function that outputs a potential that induces main discharge from a dielectric breakdown state between the electrodes immediately after applying a potential that breaks the electrical insulation state between the electrodes, and a third power supply function A solar simulator light-emitting circuit comprising a dual-purpose power source that combines a capacitor having both and a stabilizing power source for charging the capacitor.   The light-emitting circuit for a solar simulator according to claim 1, wherein the light-emitting circuit includes a current control circuit for a xenon lamp or a voltage control circuit. The light quantity sensor is arranged for the xenon lamp, and the light quantity of the lamp is stabilized by controlling the control circuit by feeding back the detection signal from the sensor to the current control circuit or the voltage control circuit. The light emitting circuit for solar simulator according to claim 5.

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