PAR64 power supply control circuit

Abstract

A PAR64 power supply control circuit disclosed by the present invention comprises a high-voltage power supply board module, and a low-voltage power supply board module and a control board module which are respectively connected with the high-voltage power supply board module, the high-voltage power supply board module comprises a dimming chip U1, the low-voltage power supply board module comprises a dimming chip U1-1, the control board module comprises a dimming chip U1-2, and the dimming chip U1 comprises a dimming chip U1-1. An inductor LF1, an inductor LF2, a rectifier bridge BD1, a transformer T2 and a triode Q2 are sequentially arranged at the input end of the high-voltage power panel module, a triode Q11 is arranged at the input end of the high-voltage power panel module, and a triode Q3, a transformer T1 and a field effect transistor Q1 are arranged at the output end of the high-voltage power panel module. The PAR64 lamp driving power supply has a multi-path power supply parallel output framework, is high in output power, high in temperature resistance, capable of supporting control of various dimming modes such as silicon controlled rectifiers and the like, high in driving capability and good in operation stability, and meets the use requirements of a plurality of PAR64 lamps.

Description

Technical Field

[0001] The present invention relates to the technical field of control circuits, and in particular to a PAR64 power supply control circuit. Background Art

[0002] PAR lamps generally include PAR30, PAR36, PAR46, PAR56, PAR64, etc., with different sizes. They are also called downlights. They emit light beams and are generally used to illuminate the stage, change colors dynamically, etc. They are common lamps on the stage. Because PAR64 has high power and consumes a lot of electricity, the requirements for PAR64 power supply are also relatively high. However, the traditional power supply structure is a single-channel output architecture with low output power, weak driving ability, poor temperature resistance, poor operating stability, and cannot meet the use requirements of multiple PAR64 lamps, resulting in poor consumer experience. Therefore, in order to avoid the shortcomings of the prior art, it is necessary to improve the prior art. Summary of the invention

[0003] The object of the present invention is to overcome the shortcomings and deficiencies in the prior art and to provide a PAR64 power supply control circuit.

[0004] The present invention is achieved through the following technical solutions:

[0005] A PAR64 power control circuit includes a high-voltage power board module and a low-voltage power board module and a control board module respectively connected to the high-voltage power board module, the high-voltage power board module includes a dimming chip U1, the low-voltage power board module includes a dimming chip U1-1, the control board module includes a dimming chip U1-2, the input end of the high-voltage power board module is sequentially provided with an inductor LF1, an inductor LF2, a rectifier bridge BD1, a transformer T2 and a transistor Q2, the input end of the high-voltage power board module is provided with a transistor Q11, and the output end of the high-voltage power board module is provided with a transistor Q3 , transformer T1 and field effect transistor Q1, the input end of the low-voltage power supply board module is sequentially provided with a transformer T2-1 and a transistor Q2-1, the input end of the low-voltage power supply board module is provided with a transistor Q11-1, the output end of the low-voltage power supply board module is provided with a transistor Q3-1, a transformer T1-1 and a field effect transistor Q1-1, the input end of the control board module is sequentially provided with a transformer T2-2 and a transistor Q2-2, the input end of the control board module is provided with a transistor Q11-2, and the output end of the control board module is provided with a transistor Q3-2, a transformer T1-2 and a field effect transistor Q1-2.

[0006] Furthermore, the models of the dimming chip U1, the dimming chip U1-1 and the dimming chip U1-2 are all IW3617.

[0007] Furthermore, the transformer T2, transformer T2-1 and transformer T2-2 are all double-winding transformers.

[0008] Furthermore, the high-voltage power board module includes a Zener diode ZD1 connected to the dimming chip U1, the positive electrode of the Zener diode ZD1 is connected to the ninth pin of the dimming chip U1, and the negative electrode of the Zener diode ZD1 is connected to the base of the transistor Q3; the low-voltage power board module includes a Zener diode ZD1-1 connected to the dimming chip U1-1, the positive electrode of the Zener diode ZD1-1 is connected to the ninth pin of the dimming chip U1-1, and the negative electrode of the Zener diode ZD1-1 is connected to the base of the transistor Q3-1; the control board module includes a Zener diode ZD1-2 connected to the dimming chip U1-2, the positive electrode of the Zener diode ZD1-2 is connected to the ninth pin of the dimming chip U1-2, and the negative electrode of the Zener diode ZD1-2 is connected to the base of the transistor Q3-2.

[0009] Furthermore, the high-voltage power board module includes a diode D9 connected to the dimming chip U1, the anode of the diode D9 is connected to the seventh pin of the dimming chip U1, and the cathode of the diode D9 is connected to the emitter of the transistor Q11; the low-voltage power board module includes a diode D9-1 connected to the dimming chip U1-1, the anode of the diode D9-1 is connected to the seventh pin of the dimming chip U1-1, and the cathode of the diode D9-1 is connected to the emitter of the transistor Q11-1; the control board module includes a diode D9-2 connected to the dimming chip U1-2, the anode of the diode D9-2 is connected to the seventh pin of the dimming chip U1-2, and the cathode of the diode D9-2 is connected to the emitter of the transistor Q11-2.

[0010] Furthermore, the high-voltage power supply board module includes a diode D3 connected to the dimming chip U1, the anode of the diode D3 is connected to the gate of the field effect transistor Q1, and the cathode of the diode D3 is connected to the tenth pin of the dimming chip U1; the low-voltage power supply board module includes a diode D3-1 connected to the dimming chip U1-1, the anode of the diode D3-1 is connected to the gate of the field effect transistor Q1-1, and the cathode of the diode D3-1 is connected to the tenth pin of the dimming chip U1-1; the control board module includes a diode D3-2 connected to the dimming chip U1-2, the anode of the diode D3-2 is connected to the gate of the field effect transistor Q1-2, and the cathode of the diode D3-2 is connected to the tenth pin of the dimming chip U1-2.

[0011] Furthermore, the collector of the transistor Q2 is connected to the fourth pin of the dimming chip U1, the collector of the transistor Q2-1 is connected to the fourth pin of the dimming chip U1-1, and the collector of the transistor Q2-2 is connected to the fourth pin of the dimming chip U1-2.

[0012] Furthermore, the high-voltage power supply board module includes a diode D1, a diode D11 and a diode D12, the output positive electrode of the transformer T1 is connected to the positive electrodes of the diode D1, the diode D11 and the diode D12 respectively through a capacitor C36, and the cathodes of the diodes D1, D11 and D12 are connected to the output positive electrode of the high-voltage power supply board module, and the low-voltage power supply board module includes a diode D1-1, a diode D11-1 and a diode D12-1, and the output positive electrode of the transformer T1-1 is connected to the diode D1-1, the diode D11-1 and the diode D12 respectively through a capacitor C36-1. 1-1 and the positive electrode of the diode D12-1 are connected, the cathodes of the diodes D1-1, D11-1 and D12-1 are connected to the output anode of the low-voltage power supply board module, the control board module includes a diode D1-2, a diode D11-2 and a diode D12-2, the output anode of the transformer T1-2 is respectively connected to the anodes of the diodes D1-2, D11-2 and D12-2 through a capacitor C36-2, and the cathodes of the diodes D1-2, D11-2 and D12-2 are connected to the output anode of the control board module.

[0013] Further, the high-voltage power board module includes a polarity capacitor C4 and a polarity capacitor C6, the positive electrodes of the polarity capacitor C4 and the polarity capacitor C6 are connected to the output positive electrode of the high-voltage power board module, and the negative electrodes of the polarity capacitor C4 and the polarity capacitor C6 are connected to the output negative electrode of the high-voltage power board module; the low-voltage power board module includes a polarity capacitor C4-1 and a polarity capacitor C6-1, the positive electrodes of the polarity capacitor C4-1 and the polarity capacitor C6-1 are connected to the output positive electrode of the low-voltage power board module, and the negative electrodes of the polarity capacitor C4-1 and the polarity capacitor C6-1 are connected to the output negative electrode of the low-voltage power board module; the control board module includes a polarity capacitor C4-2 and a polarity capacitor C6-2, the positive electrodes of the polarity capacitor C4-2 and the polarity capacitor C6-2 are connected to the output positive electrode of the control board module, and the negative electrodes of the polarity capacitor C4-2 and the polarity capacitor C6-2 are connected to the output negative electrode of the control board module.

[0014] Furthermore, the high-voltage power board module includes a thermistor RT1 and a thermistor RT2, wherein the thermistor RT1 is arranged at the voltage input connection end of the high-voltage power board module, and the thermistor RT2 is arranged at the input end of the transformer T2.

[0015] Compared with the prior art, the present invention connects the low-voltage power board module and the control board module respectively through the high-voltage power board module, and the high-voltage power board module provides stable power supply to the low-voltage power board module and the control board module. The high-voltage power board module includes a dimming chip U1, the low-voltage power board module includes a dimming chip U1-1, and the control board module includes a dimming chip U1-2, so that the PAR64 power control circuit has a multi-power parallel output architecture, large output power, high temperature resistance, support for thyristor and other dimming control methods, strong driving ability, good operation stability, the high-voltage power board module, the low-voltage power board module and the control board module can be connected to different PAR64 lamps respectively to meet the use requirements of multiple PAR64 lamps. In conjunction with the intelligent lighting system, it can effectively save electricity, reduce light pollution, and provide a good consumer experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 The schematic diagram of the circuit of the high voltage power supply board module of the present invention;

[0018] Figure 2 The schematic diagram of the circuit of the low voltage power board module of the present invention;

[0019] Figure 3 The schematic diagram of the circuit of the control panel module of the present invention is shown in FIG. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] like Figures 1 to 3The PAR64 power control circuit of the present invention includes a high-voltage power board module and a low-voltage power board module and a control board module respectively connected to the high-voltage power board module. The high-voltage power board module includes a dimming chip U1, the low-voltage power board module includes a dimming chip U1-1, and the control board module includes a dimming chip U1-2. The input end of the high-voltage power board module is provided with an inductor LF1, an inductor LF2, a rectifier bridge BD1, a transformer T2 and a transistor Q2 in sequence. The input end of the high-voltage power board module is provided with a transistor Q11, and the output end of the high-voltage power board module is provided with a transistor Q 3. Transformer T1 and field effect transistor Q1. The input end of the low-voltage power supply board module is provided with a transformer T2-1 and a transistor Q2-1 in sequence, the input end of the low-voltage power supply board module is provided with a transistor Q11-1, the output end of the low-voltage power supply board module is provided with a transistor Q3-1, a transformer T1-1 and a field effect transistor Q1-1, the input end of the control board module is provided with a transformer T2-2 and a transistor Q2-2 in sequence, the input end of the control board module is provided with a transistor Q11-2, and the output end of the control board module is provided with a transistor Q3-2, a transformer T1-2 and a field effect transistor Q1-2. The high-voltage power board module is connected to the low-voltage power board module and the control board module respectively, and the high-voltage power board module provides stable power supply to the low-voltage power board module and the control board module. The high-voltage power board module includes a dimming chip U1, the low-voltage power board module includes a dimming chip U1-1, and the control board module includes a dimming chip U1-2. The PAR64 power control circuit has a multi-power parallel output architecture, high output power, high temperature resistance, support for thyristor and other dimming control methods, strong driving ability, good operation stability, the high-voltage power board module, the low-voltage power board module and the control board module can be connected to different PAR64 lamps respectively to meet the use requirements of multiple PAR64 lamps. In conjunction with the intelligent lighting system, it can effectively save energy, reduce light pollution, and provide a good consumer experience.

[0022] As a specific implementation method, the dimming chip U1, dimming chip U1-1 and dimming chip U1-2 are all models IW3617, which makes the dimming of the PAR64 power supply more precise and the operation more stable. It supports multiple dimming control methods such as thyristor, has strong driving capability and good operation stability.

[0023] As a specific implementation, transformer T2, transformer T2-1 and transformer T2-2 are all double-winding transformers to improve the stability of output voltage control.

[0024] The high-voltage power supply board module includes a voltage regulator tube ZD1 connected to the dimming chip U1, the positive electrode of the voltage regulator tube ZD1 is connected to the ninth pin of the dimming chip U1, and the negative electrode of the voltage regulator tube ZD1 is connected to the base of the transistor Q3. The low-voltage power supply board module includes a voltage regulator tube ZD1-1 connected to the dimming chip U1-1, the positive electrode of the voltage regulator tube ZD1-1 is connected to the ninth pin of the dimming chip U1-1, and the negative electrode of the voltage regulator tube ZD1-1 is connected to the base of the transistor Q3-1. The control board module includes a voltage regulator tube ZD1-2 connected to the dimming chip U1-2, the positive electrode of the voltage regulator tube ZD1-2 is connected to the ninth pin of the dimming chip U1-2, and the negative electrode of the voltage regulator tube ZD1-2 is connected to the base of the transistor Q3-2. The voltage regulator tube plays a role in stabilizing and controlling the output voltage.

[0025] The high-voltage power supply board module includes a diode D9 connected to the dimming chip U1, the anode of the diode D9 is connected to the seventh pin of the dimming chip U1, and the cathode of the diode D9 is connected to the emitter of the transistor Q11. The low-voltage power supply board module includes a diode D9-1 connected to the dimming chip U1-1, the anode of the diode D9-1 is connected to the seventh pin of the dimming chip U1-1, and the cathode of the diode D9-1 is connected to the emitter of the transistor Q11-1. The control board module includes a diode D9-2 connected to the dimming chip U1-2, the anode of the diode D9-2 is connected to the seventh pin of the dimming chip U1-2, and the cathode of the diode D9-2 is connected to the emitter of the transistor Q11-2. The diode D9, the diode D9-1 and the diode D9-2 adjust the input current to improve the stability of the input current.

[0026] The high-voltage power board module includes a diode D3 connected to the dimming chip U1, the anode of the diode D3 is connected to the gate of the field effect transistor Q1, and the cathode of the diode D3 is connected to the tenth pin of the dimming chip U1. The low-voltage power board module includes a diode D3-1 connected to the dimming chip U1-1, the anode of the diode D3-1 is connected to the gate of the field effect transistor Q1-1, and the cathode of the diode D3-1 is connected to the tenth pin of the dimming chip U1-1. The control board module includes a diode D3-2 connected to the dimming chip U1-2, the anode of the diode D3-2 is connected to the gate of the field effect transistor Q1-2, and the cathode of the diode D3-2 is connected to the tenth pin of the dimming chip U1-2. The diode D3, the diode D3-1 and the diode D3-2 pair respectively provide overcurrent protection for the field effect transistor Q1-1, the field effect transistor Q1-2 and the field effect transistor Q1-3.

[0027] The collector of transistor Q2 is connected to the fourth pin of dimming chip U1, the collector of transistor Q2-1 is connected to the fourth pin of dimming chip U1-1, and the collector of transistor Q2-2 is connected to the fourth pin of dimming chip U1-2, so as to stably control the current input of the dimming chip.

[0028] The high-voltage power supply board module includes a diode D1, a diode D11 and a diode D12. The output positive electrode of the transformer T1 is connected to the positive electrodes of the diode D1, the diode D11 and the diode D12 through a capacitor C36. The negative electrodes of the diodes D1, D11 and D12 are connected to the output positive electrode of the high-voltage power supply board module. The low-voltage power supply board module includes a diode D1-1, a diode D11-1 and a diode D12-1. The output positive electrode of the transformer T1-1 is connected to the positive electrodes of the diodes D1-1, D11-1 and D12-1 through a capacitor C36-1. The positive electrode of the diode D1-1, the diode D11-1 and the diode D12-1 are connected to the output positive electrode of the low-voltage power supply board module. The control board module includes a diode D1-2, a diode D11-2 and a diode D12-2. The output positive electrode of the transformer T1-2 is respectively connected to the positive electrode of the diode D1-2, the diode D11-2 and the diode D12-2 through a capacitor C36-2. The negative electrode of the diode D1-2, the diode D11-2 and the diode D12-2 is connected to the output positive electrode of the control board module to stably control the output current of the PAR64 power supply.

[0029] The high-voltage power board module includes polarity capacitor C4 and polarity capacitor C6, the positive electrodes of polarity capacitor C4 and polarity capacitor C6 are connected to the output positive electrode of the high-voltage power board module, and the negative electrodes of polarity capacitor C4 and polarity capacitor C6 are connected to the output negative electrode of the high-voltage power board module. The low-voltage power board module includes polarity capacitor C4-1 and polarity capacitor C6-1, the positive electrodes of polarity capacitor C4-1 and polarity capacitor C6-1 are connected to the output positive electrode of the low-voltage power board module, and the negative electrodes of polarity capacitor C4-1 and polarity capacitor C6-1 are connected to the output negative electrode of the low-voltage power board module. The control board module includes polarity capacitor C4-2 and polarity capacitor C6-2, the positive electrodes of polarity capacitor C4-2 and polarity capacitor C6-2 are connected to the output positive electrode of the control board module, and the negative electrodes of polarity capacitor C4-2 and polarity capacitor C6-2 are connected to the output negative electrode of the control board module, so as to perform overcurrent protection on the output of the PAR64 power supply.

[0030] The high-voltage power supply board module includes a thermistor RT1 and a thermistor RT2. The thermistor RT1 is arranged at the voltage input connection end of the high-voltage power supply board module, and the thermistor RT2 is arranged at the input end of the transformer T2 to provide overheat protection for the PAR64 power supply.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A PAR64 power supply control circuit, characterized in that: The invention comprises a high-voltage power supply board module and a low-voltage power supply board module and a control board module respectively connected to the high-voltage power supply board module, wherein the high-voltage power supply board module comprises a dimming chip U1, the low-voltage power supply board module comprises a dimming chip U1-1, and the control board module comprises a dimming chip U1-2. The input end of the high-voltage power supply board module is provided with an inductor LF1, an inductor LF2, a rectifier bridge BD1, a transformer T2 and a transistor Q2 in sequence, the input end of the high-voltage power supply board module is provided with a transistor Q11, and the output end of the high-voltage power supply board module is provided with a transistor Q3, a transformer T1 and Field effect transistor Q1, the input end of the low-voltage power board module is provided with a transformer T2-1 and a transistor Q2-1 in sequence, the input end of the low-voltage power board module is provided with a transistor Q11-1, the output end of the low-voltage power board module is provided with a transistor Q3-1, a transformer T1-1 and a field effect transistor Q1-1, the input end of the control board module is provided with a transformer T2-2 and a transistor Q2-2 in sequence, the input end of the control board module is provided with a transistor Q11-2, and the output end of the control board module is provided with a transistor Q3-2, a transformer T1-2 and a field effect transistor Q1-2.

2. The PAR64 power supply control circuit according to claim 1, characterized in that: The dimming chip U1, the dimming chip U1-1 and the dimming chip U1-2 are all of model IW3617.

3. The PAR64 power supply control circuit according to claim 1, characterized in that: The transformer T2, transformer T2-1 and transformer T2-2 are all double-winding transformers.

4. The PAR64 power supply control circuit according to claim 1, characterized in that: The high-voltage power supply board module includes a voltage regulator tube ZD1 connected to the dimming chip U1, the positive electrode of the voltage regulator tube ZD1 is connected to the ninth pin of the dimming chip U1, and the negative electrode of the voltage regulator tube ZD1 is connected to the base of the transistor Q3; the low-voltage power supply board module includes a voltage regulator tube ZD1-1 connected to the dimming chip U1-1, the positive electrode of the voltage regulator tube ZD1-1 is connected to the ninth pin of the dimming chip U1-1, and the negative electrode of the voltage regulator tube ZD1-1 is connected to the base of the transistor Q3-1; the control board module includes a voltage regulator tube ZD1-2 connected to the dimming chip U1-2, the positive electrode of the voltage regulator tube ZD1-2 is connected to the ninth pin of the dimming chip U1-2, and the negative electrode of the voltage regulator tube ZD1-2 is connected to the base of the transistor Q3-2.

5. The PAR64 power supply control circuit according to claim 1, characterized in that: The high-voltage power supply board module includes a diode D9 connected to the dimming chip U1, the anode of the diode D9 is connected to the seventh pin of the dimming chip U1, and the cathode of the diode D9 is connected to the emitter of the transistor Q11; the low-voltage power supply board module includes a diode D9-1 connected to the dimming chip U1-1, the anode of the diode D9-1 is connected to the seventh pin of the dimming chip U1-1, and the cathode of the diode D9-1 is connected to the emitter of the transistor Q11-1; the control board module includes a diode D9-2 connected to the dimming chip U1-2, the anode of the diode D9-2 is connected to the seventh pin of the dimming chip U1-2, and the cathode of the diode D9-2 is connected to the emitter of the transistor Q11-2.

6. The PAR64 power supply control circuit according to claim 1, characterized in that: The high-voltage power supply board module includes a diode D3 connected to the dimming chip U1, the anode of the diode D3 is connected to the gate of the field effect tube Q1, and the cathode of the diode D3 is connected to the tenth pin of the dimming chip U1. The low-voltage power supply board module includes a diode D3-1 connected to the dimming chip U1-1, the anode of the diode D3-1 is connected to the gate of the field effect tube Q1-1, and the cathode of the diode D3-1 is connected to the tenth pin of the dimming chip U1-1. The control board module includes a diode D3-2 connected to the dimming chip U1-2, the anode of the diode D3-2 is connected to the gate of the field effect tube Q1-2, and the cathode of the diode D3-2 is connected to the tenth pin of the dimming chip U1-2.

7. The PAR64 power supply control circuit according to claim 1, characterized in that: The collector of the transistor Q2 is connected to the fourth pin of the dimming chip U1, the collector of the transistor Q2-1 is connected to the fourth pin of the dimming chip U1-1, and the collector of the transistor Q2-2 is connected to the fourth pin of the dimming chip U1-2.

8. The PAR64 power supply control circuit according to claim 1, characterized in that: The high-voltage power supply board module includes a diode D1, a diode D11 and a diode D12. The output positive electrode of the transformer T1 is connected to the positive electrodes of the diode D1, the diode D11 and the diode D12 through a capacitor C36. The cathodes of the diodes D1, the diode D11 and the diode D12 are connected to the output positive electrode of the high-voltage power supply board module. The low-voltage power supply board module includes a diode D1-1, a diode D11-1 and a diode D12-1. The output positive electrode of the transformer T1-1 is connected to the cathodes of the diodes D1-1, the diode D11-1 and the diode D12-1 through a capacitor C36-1. 1 and the positive electrode of the diode D12-1 are connected, the cathodes of the diodes D1-1, D11-1 and D12-1 are connected to the output anode of the low-voltage power supply board module, the control board module includes a diode D1-2, a diode D11-2 and a diode D12-2, the output anode of the transformer T1-2 is respectively connected to the anodes of the diodes D1-2, D11-2 and D12-2 through a capacitor C36-2, and the cathodes of the diodes D1-2, D11-2 and D12-2 are connected to the output anode of the control board module.

9. The PAR64 power supply control circuit according to claim 1, characterized in that: The high-voltage power board module includes a polar capacitor C4 and a polar capacitor C6, the positive electrodes of the polar capacitor C4 and the polar capacitor C6 are connected to the output positive electrode of the high-voltage power board module, and the negative electrodes of the polar capacitor C4 and the polar capacitor C6 are connected to the output negative electrode of the high-voltage power board module. The low-voltage power board module includes a polar capacitor C4-1 and a polar capacitor C6-1, the positive electrodes of the polar capacitor C4-1 and the polar capacitor C6-1 are connected to the output positive electrode of the low-voltage power board module, and the negative electrodes of the polar capacitor C4-1 and the polar capacitor C6-1 are connected to the output negative electrode of the low-voltage power board module. The control board module includes a polar capacitor C4-2 and a polar capacitor C6-2, the positive electrodes of the polar capacitor C4-2 and the polar capacitor C6-2 are connected to the output positive electrode of the control board module, and the negative electrodes of the polar capacitor C4-2 and the polar capacitor C6-2 are connected to the output negative electrode of the control board module.

10. The PAR64 power supply control circuit according to claim 1, characterized in that: The high-voltage power board module includes a thermistor RT1 and a thermistor RT2. The thermistor RT1 is arranged at the voltage input connection end of the high-voltage power board module, and the thermistor RT2 is arranged at the input end of the transformer T2.

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