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A single-phase three-level buck PFC rectifier and its control method

A control method, three-level technology, applied in electrical components, high-efficiency power electronic conversion, AC power input conversion to DC power output, etc., to reduce costs, avoid input current dead angle, and reduce electromagnetic interference sources.

Active Publication Date: 2021-08-13
GUANGDONG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Based on this, the present invention provides a single-phase three-level Buck PFC rectifier and its control method to solve the above-mentioned defects of the existing PFC rectifier

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  • A single-phase three-level buck PFC rectifier and its control method
  • A single-phase three-level buck PFC rectifier and its control method
  • A single-phase three-level buck PFC rectifier and its control method

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Embodiment Construction

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0046] see Figure 3-Figure 10 , this embodiment provides a single-phase three-level Buck PFC rectifier and its control method, the rectifier includes:

[0047] Power inductor L, N-channel power MOSFET S with antiparallel diode 1 , IGBTS without anti-parallel diode 2 and S 3 , fast recovery diode D 1 、D 2 、D 3 、D 4 , the output filter capacitor C o1 、C o2 , load R;

[0048] The power switch tube and the fast recovery diode form a conduction unit conn...

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Abstract

The present application relates to a single-phase three-level Buck PFC rectifier and its control method, using Buck topology circuit structure, IGBT without anti-parallel diodes and corresponding circuit control method to realize the continuous mode (CCM) single-phase three-power inductance current The function of flat power factor correction; the buck circuit topology is used to realize the step-down output, thereby reducing the requirements for the voltage stress of the subsequent equipment; this circuit can avoid the problem of the traditional Buck PFC input current dead angle, so as to achieve low total harmonic distortion and high The effect of power factor and efficient and stable work.

Description

technical field [0001] The invention belongs to the field of power factor correction, and in particular relates to a single-phase three-level Buck PFC rectifier and a control method thereof. Background technique [0002] The electronic switching power supply equipment connected to the power grid is the main source of current harmonics in the power grid. The higher harmonics will affect the power quality of the power grid, transmission efficiency and the safe operation of other equipment. Power factor correction (power factor correction, PFC) is to suppress High-order harmonic currents and effective methods to improve power factor have become important components of medium and high-power electronic equipment. Among them, active power factor correction (APFC) is more widely used. [0003] The traditional PFC circuit is represented by a step-up Boost circuit, such as figure 1 As shown, the output voltage of Boost bridgeless PFC is relatively high, and the voltage stress of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/217H02M1/42H02M1/12H02M1/44
CPCH02M1/12H02M1/4208H02M1/44H02M7/217H02M1/4291Y02B70/10
Inventor 李优新赵付立李志忠何源烽
Owner GUANGDONG UNIV OF TECH
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