Series composation step-up single phase power factor correction circuit

Abstract

This invention relates to a single phase power factor correction circuit of serial compensation boosting composed of a reactor circuit, a magnetic energy resuming switch and a commutation and filter circuit, in which, the reactor circuit filters its current to get lag and almost sine wave input current, the magnetic energy resuming switch is composed of four power switches, two power diodes, electrolysis capacitors and a driver, the almost sine wave current synchronized to the supply voltage is got by executing capacitive compensation to the circuit current and making up the voltage drop induced by the reactor, the commutation and filter circuit commutates and filters the almost square wave alternative voltage to get a high mean value and DC output voltage of low ripple voltage.

Description

technical field [0001] The invention relates to a single-phase power factor correction circuit for series compensation and boosting, in particular to a single-phase active power factor corrector (APFC), which adopts a magnetic energy recovery switch series compensation scheme and can obtain higher DC voltage output The single-phase AC-DC circuit with active correction function has a very wide range of applications. Background technique [0002] In the field of low-power power electronic converters using single-phase uncontrolled rectifiers as the power front stage, such as the field of frequency conversion household appliances, the final products must meet China's 3C certification and related international certification, including electromagnetic compatibility (EMC) certification. In this certification, it stipulates the frequency and content standards of the harmonic current injected into the power grid by the frequency conversion household appliances and the conduction dis...

AI Technical Summary

Problems solved by technology

Using active correction technology, the correction effect is good, but the cost is too high, and problems such as heat dissipation and high-frequency electromagnetic interference need to be dealt with

Using passive correction technology, proper parameter configuration can obtain better correction effect, lower cost, easy to deal with heat dissipation and electromagnetic interference and other issues, but when the load is large, the voltage drop caused by the filter reactor is large, which affects the load increase in capacity

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