Computer power supply

Abstract

The invention relates to a computer power supply. The computer power supply comprises a electromagnetic compatible filter, an input current and filter, a high-frequency switch power conversion module, a multiplexed output rectifier and filter, an auxiliary power supply module, a pulse width modulation controller and an auxiliary circuit. The computer power supply is characterized by further comprising a simulated chaotic signal generator and a simulated chaotic signal processing module, wherein the simulated chaotic signal processing module receives, processes and outputs an output signal of the simulated chaotic signal generator. The pulse width modulation controller simultaneously receives output signals of the auxiliary power supply module, the auxiliary circuit and the simulated chaotic signal processing module and processes and outputs the output signals to the high-frequency switch power conversion module. The computer power supply has the advantages of being capable of improving the electromagnetic compatibility of a switch power supply, reducing peak of harmonic component and accordingly decreasing conducted interference mainly by reducing amplitude of a harmonic signal of switching frequency passing through a chaotization system.

Description

technical field [0001] The invention relates to a computer power supply. Background technique [0002] At present, the computer power supply used is a relatively complex switching power supply, which itself is a typical switching nonlinear system. The switching working state of its power switching tube will cause instantaneous jumps in current and voltage in the power converter, resulting in extremely high energy. electromagnetic interference. Engineers usually use filters and shielding methods to reduce electromagnetic interference, but these methods have their own defects, and the design mainly depends on engineering experience. With the update and improvement of the international electromagnetic compatibility standards, the traditional methods of suppressing electromagnetic interference cannot well meet the requirements of electromagnetic compatibility, and new ideas and methods need to be found. Due to the pseudo-randomness and ergodicity of the chaotic signal, it has ...

AI Technical Summary

Problems solved by technology

In theory, the chaotic signal is used to modulate the PWM signal of the switching power supply, which can effectively suppress electromagnetic interference, and has been verified by simulation or laboratory prototypes, but the actual application in industrial products is relatively rare, because the power of computer power supply is usually above 200W, The power converter usually works in the half-bridge topology, and the pulse width modulation circuit controls the turn-on of the two power switch tubes (the switching frequency is usually above 30KHz), which makes the corresponding control circuit and protection circuit more complicated.

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