Rectifier and control method thereof

A technology of rectifier and rectifier circuit, which is applied in the direction of conversion equipment without intermediate conversion to AC, irreversible AC power input conversion into DC power output, output power conversion device, etc., which can solve the problem of large output current ripple and high output voltage , complex drive and control strategies, etc., to achieve the effect of reliable and stable work and simple control
CN107465353AActive Publication Date: 2017-12-12NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Publication Date
2017-12-12

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Abstract

The invention discloses a rectifier and a control method thereof, and belongs to the technical field of high power factor rectification. The rectifier comprises a three-phase voltage source circuit (1), a three-phase uncontrolled rectification circuit (2), two symmetric boost circuits (3), a third harmonic voltage generation circuit (4) and an H-bridge boost power factor correction (PFC) circuit (5), wherein double half-wave boost PFCs respectively generate steamed bread wave phase current waveforms at 30-150 degrees and 210-330 degrees within a period, a waveform compensation circuit can be switched to the corresponding phase when a certain phase current lacks, the phase current waveform which is insufficient is compensated, so that an input current is changed to a standard sine wave, and a converter works in a unit power factor rectification state. The rectifier can be used for a three-phase AC / DC conversion circuit having the PFC function, and the topological structure is simple and is convenient to control and easy to implement.
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Description

technical field

[0001] The invention relates to a rectifier and a control method thereof, belonging to the technical field of high power factor rectification. Background technique

[0002] Power Factor Correction Technique (Power Factor Correction Technique) is a basic technology in the field of power electronics and industry. It is used to suppress harmonic pollution and reduce the harm caused by high-order current harmonics to the power grid and various electrical equipment. With the increase of electrical equipment, the requirements of high efficiency, high power density and high power factor are also put forward for the power converter. Therefore, various new PFC conversion topologies have also emerged as the times require.

[0003] There are two types of power factor correction technology: passive power factor correction and active power factor correction. Passive power factor correction uses passive components, such as LC filters. Although the circuit structure is sim...

Claims

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