CN-121984356-A - Acceleration power supply of electronic curtain

CN121984356ACN 121984356 ACN121984356 ACN 121984356ACN-121984356-A

Abstract

The application provides an acceleration power supply of an electronic curtain, which comprises a three-phase rectifying circuit, a high-frequency inverter circuit, a step-up transformer and a driving circuit, wherein the three-phase rectifying circuit is used for receiving three-phase alternating current from a power grid and outputting direct current, the high-frequency inverter circuit is used for inverting the direct current into alternating current and comprises a first bridge arm formed by a first switching tube and a second switching tube, a second bridge arm formed by a third switching tube and a fourth switching tube, two ends of the first bridge arm and the second bridge arm are respectively connected with a positive output end and a negative output end of the three-phase rectifying circuit, the step-up transformer is connected with the high-frequency inverter circuit and used for boosting the alternating current and outputting direct current high voltage, and the driving circuit is connected with control ends of the first switching tube, the second switching tube, the third switching tube and the fourth switching tube and used for controlling the first switching tube, the second switching tube, the third switching tube and the fourth switching tube based on a phase-shifting control technology.

Inventors

Gao Saidi
Ma Kangqiao
ZHANG LIFENG
YU GUOLONG

Assignees

中国原子能科学研究院

Dates

Publication Date: 20260505
Application Date: 20260109

Claims (10)

1. An acceleration power supply for an electronic curtain, comprising: The three-phase rectification circuit is used for receiving three-phase alternating current from a power grid and outputting direct current; The high-frequency inverter circuit is used for inverting the direct current into alternating current and comprises a first bridge arm formed by a first switching tube and a second bridge arm formed by a third switching tube and a fourth switching tube, and two ends of the first bridge arm and the second bridge arm are respectively connected with a positive output end and a negative output end of the three-phase rectifying circuit; A step-up transformer connected to the high-frequency inverter circuit for step-up the alternating current and outputting a direct current high voltage; The driving circuit is connected with the control ends of the first switching tube, the second switching tube, the third switching tube and the fourth switching tube and is used for controlling the first switching tube, the second switching tube, the third switching tube and the fourth switching tube based on a phase shift control technology.
2. The accelerating power supply of claim 1, wherein the high frequency inverter circuit further comprises a resonant inductor, the first ends of the first switching tube and the third switching tube are the first ends of the first bridge arm and the second bridge arm, respectively, the second ends of the first switching tube are connected with the first ends of the resonant inductor and the first ends of the second switching tube, the second ends of the third switching tube are connected with the first ends of the fourth switching tube, and the second ends of the second switching tube and the fourth switching tube are the second ends of the first bridge arm and the second bridge arm, respectively.
3. The accelerating power supply of claim 2, wherein the step-up transformer comprises a primary winding, a first end of the primary winding being connected to a second end of the resonant inductor, a second end of the primary winding being connected to a second end of the third switching tube and a first end of the fourth switching tube.
4. The accelerating power supply of claim 1, wherein the step-up transformer comprises a plurality of secondary windings and a plurality of rectifying and filtering circuits, wherein, Each secondary winding is connected with one rectifying and filtering circuit.
5. The accelerating power supply of claim 4, wherein the number of secondary windings and the number of rectifying and filtering circuits corresponding to the secondary windings are 8.
6. The accelerating power supply of claim 4, wherein each of the rectifying and filtering circuits comprises a first diode, a second diode, a third diode, a fourth diode and a high voltage capacitor, wherein a first end of the secondary winding is connected with an anode of the first diode and a cathode of the second diode, a second end of the secondary winding is connected with an anode of the third diode and a cathode of the fourth diode, a cathode of the first diode and a cathode of the third diode are connected with a first end of the high voltage capacitor, an anode of the second diode and an anode of the fourth diode are connected with a second end of the high voltage capacitor, and the high voltage capacitors of each of the rectifying and filtering circuits are connected in series.
7. The accelerating power supply of claim 1, wherein the three-phase rectification circuit includes a fifth switching tube, a sixth switching tube, a seventh switching tube, an eighth switching tube, a ninth switching tube, and a tenth switching tube; The fifth switching tube and the sixth switching tube are connected with the first end of the seventh switching tube, the eighth switching tube and the ninth switching tube are connected with the second end of the tenth switching tube, the second end of the fifth switching tube is connected with the first phase of the three-phase alternating current and the first end of the eighth switching tube, the second end of the sixth switching tube is connected with the second phase of the three-phase alternating current and the first end of the ninth switching tube, and the second end of the seventh switching tube is connected with the third phase of the three-phase alternating current and the first end of the tenth switching tube; the driving circuit is connected with the control ends of the fifth switching tube, the sixth switching tube, the seventh switching tube, the eighth switching tube, the ninth switching tube and the tenth switching tube and is used for controlling the fifth switching tube, the sixth switching tube, the seventh switching tube, the eighth switching tube, the ninth switching tube and the tenth switching tube based on SPWM technology.
8. The accelerating power supply of claim 1, further comprising a high voltage sampling circuit, an electron beam sampling resistor, a current transducer, a fault discrimination circuit and a controller; The high-voltage sampling circuit is connected with the output end of the step-up transformer and is used for detecting an output voltage value; The electron beam sampling resistor is arranged between the low-voltage end of the step-up transformer and the grounding end and is used for detecting the electron beam current value; the current transducer is connected with the output end of the high-frequency inverter circuit and is used for converting the inverted alternating current value into a direct current voltage value according to a linear proportion; The fault judging circuit is connected with the high-voltage sampling circuit, the electron beam sampling resistor and the current transmitter and is used for generating a fault signal if at least one of the output voltage value, the variation value of the output voltage, the electron beam current value and the direct current voltage value is determined to be out of limit; the controller is connected with the fault judging circuit and the driving circuit and is used for controlling the driving circuit to be suspended based on the fault signal.
9. The acceleration power supply of claim 8, further comprising a phase current phase detector; the phase current phase detector is connected with the three-phase alternating current and the driving circuit and is used for detecting the phase of each phase voltage in the three-phase alternating current, generating a phase driving signal and sending the phase driving signal to the driving circuit; The driving circuit is used for controlling the first switching tube, the second switching tube, the third switching tube and the fourth switching tube based on the phase driving signal.
10. The acceleration power supply of claim 9, further comprising a comparator and a high voltage regulator; the comparator is connected with the high-voltage sampling circuit, the high-voltage regulator and the controller; The high-voltage regulator is connected with the driving circuit, wherein, The controller is used for outputting a high-voltage given signal to the comparator, the comparator is used for generating a high-voltage deviation signal based on the output voltage value and the high-voltage given signal and sending the high-voltage deviation signal to the high-voltage regulator, the high-voltage regulator is used for generating a control signal based on the high-voltage deviation signal and sending the control signal to the driving circuit, and the driving circuit is also used for controlling the first switching tube, the second switching tube, the third switching tube and the fourth switching tube based on the control signal.

Description

Acceleration power supply of electronic curtain Technical Field The application relates to the technical field of accelerators, in particular to an accelerating power supply of an electronic curtain. Background The accelerating power supply of the electronic curtain is a high-power high-voltage direct current power supply. It is a core component of the electron curtain, provides acceleration voltage for electron beams, and plays a key role in irradiation. In the related art, the conversion efficiency of an acceleration power supply of an electronic curtain is low, the volume is large, and the output voltage is unstable. Disclosure of Invention Therefore, the embodiment of the application provides an acceleration power supply of an electronic curtain, which aims to improve the conversion efficiency of the acceleration power supply of the electronic curtain, reduce the volume and improve the stability of output voltage. The technical scheme provided by the embodiment of the application is realized as follows: the embodiment of the application provides an acceleration power supply of an electronic curtain, which comprises the following components: The three-phase rectification circuit is used for receiving three-phase alternating current from a power grid and outputting direct current; The high-frequency inverter circuit is used for inverting the direct current into alternating current and comprises a first bridge arm formed by a first switching tube and a second bridge arm formed by a third switching tube and a fourth switching tube, and two ends of the first bridge arm and the second bridge arm are respectively connected with a positive output end and a negative output end of the three-phase rectifying circuit; A step-up transformer connected to the high-frequency inverter circuit for step-up the alternating current and outputting a direct current high voltage; The driving circuit is connected with the control ends of the first switching tube, the second switching tube, the third switching tube and the fourth switching tube and is used for controlling the first switching tube, the second switching tube, the third switching tube and the fourth switching tube based on a phase shift control technology. In some embodiments, the high-frequency inverter circuit further includes a resonant inductor, the first end of the first switching tube and the first end of the third switching tube are respectively the first ends of the first bridge arm and the second bridge arm, the second end of the first switching tube is connected with the first end of the resonant inductor and the first end of the second switching tube, the second end of the third switching tube is connected with the first end of the fourth switching tube, and the second end of the second switching tube and the second end of the fourth switching tube are respectively the second ends of the first bridge arm and the second bridge arm. In some embodiments, the step-up transformer includes a primary winding, a first end of the primary winding being connected to a second end of the resonant inductor, a second end of the primary winding being connected to a second end of the third switching tube and a first end of the fourth switching tube. In some embodiments, the step-up transformer includes a plurality of secondary windings and a plurality of rectifying and filtering circuits, wherein, Each secondary winding is connected with one rectifying and filtering circuit. In some embodiments, the number of secondary windings and the number of rectifying and filtering circuits corresponding to the secondary windings are 8. In some embodiments, each of the rectifying and filtering circuits comprises a first diode, a second diode, a third diode, a fourth diode and a high-voltage capacitor, a first end of the secondary winding is connected with an anode of the first diode and a cathode of the second diode, a second end of the secondary winding is connected with an anode of the third diode and a cathode of the fourth diode, a cathode of the first diode and the third diode is connected with a first end of the high-voltage capacitor, an anode of the second diode and an anode of the fourth diode are connected with a second end of the high-voltage capacitor, and the high-voltage capacitors of each of the rectifying and filtering circuits are connected in series. In some embodiments, the three-phase rectification circuit includes a fifth switching tube, a sixth switching tube, a seventh switching tube, an eighth switching tube, a ninth switching tube, and a tenth switching tube; The fifth switching tube and the sixth switching tube are connected with the first end of the seventh switching tube, the eighth switching tube and the ninth switching tube are connected with the second end of the tenth switching tube, the second end of the fifth switching tube is connected with the first phase of the three-phase alternating current and the first end of the eighth switching tube, the se