High-frequency switch rectifying power supply with wide-range direct current voltage output characteristic

Abstract

The invention discloses a high-frequency switch rectifying power supply with wide-range direct current voltage output characteristic, which comprises a rectifying bridge, a direct current bus, a high-frequency switching tube, a high-frequency transformer, a high-frequency rectifying tube and a high-frequency switching tube controller, wherein the alternating current is rectified by the rectifying bridge and then is connected to the direct current bus; the voltage on the direct current bus is inversed by the high-frequency switching tube; the inversed alternating current voltage is connected to the high-frequency transformer, transformed by the high-frequency transformer and finally rectified by the high-frequency rectifying tube to output direct current electrical energy; the rectifying bridge is a controllable transistor rectifying bridge and is provided with a corresponding transistor controller; the transistor controller adjusts the transistor rectifying bridge which inputs rectified current by adjusting the phase control angle of the transistor to change the rectified voltage output to the direct current bus so as to finish coarse adjustment; the high-frequency switching tube controller adjusts the high-frequency switching tube by adjusting the duty ratio so as to finish fine adjustment; and the coarse adjustment and the fine adjustment are matched so that the high-frequency switching tube, the high-frequency transformer and the high-frequency rectifying tube work in a state of large duty ratio all the time.

Description

technical field [0001] The invention relates to the technical field of power electronic equipment, in particular to a high-frequency switching rectifying power supply with wide-range DC voltage output characteristics. Background technique [0002] The rectifier power supply is a device that converts AC power in the grid into DC power. Its requirement is that the output DC voltage and current can be continuously adjusted within the rated range. Due to the limitation of the circuit topology and the performance of components, the rectified power supply has a certain voltage regulation range limit, that is, the output of the rated current must be allowed after the output DC voltage exceeds a certain value. Under the operating conditions of low voltage and high current, the device may be damaged and the operating efficiency will be reduced. [0003] Conventional high frequency rectifier power supply such as figure 1 As shown, firstly, the power frequency AC power supply is rect...

AI Technical Summary

Problems solved by technology

Therefore, its voltage regulation range is narrow, and it generally needs to be more than 70% of the rated voltage to reach the rated current output.

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