Active passive mixed single phase power factor correcting circuit

Abstract

This invention relates to an active and passive single-phase power factor correction circuit composed of a reactor circuit, a magnetic energy resuming switch, a triple resonance circuit and a commutation filter circuit, in which, the reactor circuit carries out sensitive filter to circuit current, the magnetic energy resuming switch carries out capacitive compensation to the circuit current, the triple harmonic magnetic field generated by the secondary of the triple resonance circuit cancels out the primary triple harmonic current, and an AC voltage approximate to square waves and a circuit current approaching to synchronous and sine waveform are generated under the common action of the above three parts of circuits to be rectified and filtered by the commutation and filter circuit to get the DC output voltage with high mean value and low ripple voltage again.

Description

technical field [0001] The present invention relates to an active-passive hybrid single-phase power factor correction circuit, in particular to a series compensation scheme suitable for adopting a reactor circuit, a magnetic energy recovery switch and a third-order resonant circuit, and capable of obtaining a higher DC voltage output. The single-phase AC-DC circuit with input power factor 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 a...

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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