A high-precision integrated high-frequency high-voltage power supply

Abstract

The invention provides a high-precision integrated high-frequency and high-voltage power supply, comprising a full-bridge inverter unit, a boost transformer and a multi-voltage rectifying device. Alsoincluded is a drive control unit for driving the full-bridge inverter unit. The driving control unit comprises a PWM driving circuit, a voltage control circuit and a current control circuit. Using the design of full analog circuit, and the output of PWM is controlled by current control and voltage control simultaneously, fast response, The control precision is high, the input sampling signal andthe control output signal of current or voltage are processed effectively, and the precision of the power supply is further improved. At the same time, the multi-voltage rectifying device designed asa whole is adopted, and the installation and heat dissipation are reasonably arranged, which is favorable for forming an integrated installation structure of the high-frequency and high-voltage powersupply with high voltage level.

Description

technical field [0001] The invention relates to the technical field of high-frequency and high-voltage power supplies, in particular to a high-precision integrated high-frequency and high-voltage power supply. Background technique [0002] DC high-frequency high-voltage power supplies are mainly used in equipment such as electrostatic precipitators and testing instruments. In the prior art, high-frequency high-voltage power supplies are generally implemented by full-bridge inverters, step-up transformers and voltage doubler rectifiers. Among them, the output frequency of the power supply It is realized by driving the full-bridge inverter circuit by the PWM driver board. [0003] 1) The circuit design of most of the existing PWM driver boards adopts digital technology or smart chip technology. The design of this circuit responds slowly and cannot achieve high-precision triggering effects; [0004] 2) The existing PWM drive generally only has a single feedback function of cur...

AI Technical Summary

Problems solved by technology

[0003] 1) The circuit design of most of the existing PWM driver boards adopts digital technology or smart chip technology. The design of this circuit responds slowly and cannot achieve high-precision triggering effects;

[0004] 2) The existing PWM drive generally only has a single feedback function of current or voltage, and its control accuracy is not high;

[0005] 3) There is no high-precision signal processing circuit for the processing of the voltage or current acquisition signal, and there is no high-precision signal output processing circuit for the output processing of the voltage control signal or current control signal

[0006] The above-mentioned defects have caused the overall accuracy of the existing DC high-frequency high-voltage power supply to be low and the system response speed to be slow

[0007] 4) The existing high-voltage power supply generally does not allow short-circuit and open-circuit, short-circuit impact is easy to be damaged by over-current, and open-circuit is easy to burn out due to overvoltage;

[0008] 5) Existing products generally cannot adjust the output voltage and current linearly from 0

[0009] In addition, the existing voltage doubler rectifier does not have a reasonable overall heat dissipation structure

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