High-frequency power supply bias magnet suppression system based on DSP and control method

Abstract

The invention discloses a high-frequency power supply bias magnet suppression system based on a DSP and a control method. The system comprises a DSP control circuit, a main power circuit, a peak current feedback circuit and an output feedback circuit, wherein the DSP control circuit is connected with the main power circuit, the peak current feedback circuit and the output feedback circuit, and the main power circuit is connected with the peak current feedback circuit and the output feedback circuit. The control method includes the steps that an analog comparator of the DSP control circuit and one D / A circuit form a peak control mode to control power supply output; the bias magnet phenomenon of a transformer is accurately detected and processed through the other D / A circuit and the analog comparator. By the adoption of the bias magnet suppression system and the control method, the bias magnet phenomenon can be detected in advance, controlled and eliminated, and the design allowance of the transformer is reduced.

Description

technical field [0001] The invention relates to the technical field of DC power conversion, in particular to a DSP-based high-frequency power bias suppression system and control method. Background technique [0002] The peak value control itself is a control method for suppressing the magnetic bias, but in the case of high power, especially in the case of a small transformer design margin, the peak value control also has a magnetic bias phenomenon, but the conventional peak control method cannot detect the magnetic bias If the phenomenon occurs, it cannot be controlled in advance until the power output of the power supply is abnormal or the overcurrent stops working. However, this control method can detect when a slight magnetic bias phenomenon occurs, and control it to eliminate the bias magnetic phenomenon. Contents of the invention [0003] The purpose of the present invention is to provide a DSP-based high-frequency power supply bias suppression system and control met...

AI Technical Summary

Problems solved by technology

[0002] The peak value control itself is a control method for suppressing the magnetic bias, but in the case of high power, especially in the case of a small transformer design margin, the peak value control also has a magnetic bias phenomenon, but the conventional peak control method cannot detect the magnetic bias If the phenomenon occurs, it cannot be controlled in advance until the power output is abnormal or the power supply stops working due to overcurrent. However, this control method can detect when a slight magnetic bias phenomenon occurs, and control it to eliminate the magnetic bias phenomenon.

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