Talking about the transformation plan of phase-controlled power supply

zbz0529

Talking about the transformation plan of phase-controlled power supply [Copy link]

Abstract: This paper discusses the inevitable trend of phase-controlled power supply transformation in current communication systems from the aspects of performance advantages, intelligent advantages and economic benefits of high-frequency switching power supplies.

Keywords: Phase-controlled high-frequency switch transformation

Communication power supplies play an extremely important role in communication systems, and their performance directly affects the quality and reliability of communication. With the rapid development of the communication industry, the requirements for it are getting higher and higher. Phase-controlled voltage-stabilized power supplies can no longer meet the quality and reliability requirements of modern communications, and are gradually being replaced by high-frequency switching power supplies with better performance.

Phase-controlled power supply refers to a power supply system that uses thyristors as rectifiers. Its principle is that the AC input voltage is stepped down by an industrial frequency transformer, and then controlled rectification is performed using thyristors. In order to maintain the stability of the output voltage, a relatively complex thyristor trigger circuit is required. The high-frequency switching power supply directly rectifies the AC input, and then converts the high-voltage DC (single-phase rectification about 300V, three-phase rectification about 540V) into a high-frequency square wave (above 20kHz) through an inverter circuit composed of power switching devices (power transistors, MOS tubes, IGBTs, etc.). The high-frequency square wave is stepped down by a high-frequency transformer and then rectified and filtered to obtain a stable DC output.