Single inductor bridgeless APFC circuit based on IGBT module

Abstract

The invention discloses a single inductor bridgeless APFC circuit based on an IGBT module, and the circuit comprises an AC filter capacitor C1, a first IGBT module S1, a second IGBT module S2, an inductor L, a first power diode D1, a second power diode D2, a third power diode D3, a fourth power diode D4, a DC filter capacitor E1, a first divider resistor R1 and a second divider resistor R2; the anode of the first power diode D1, the first end portion of the AC filter capacitor C1 and a collector electrode of the first IGBT module S1 are connected with a power supply fire wire; the anode of the fourth power diode D4, the second end portion of the AC filter capacitor C1 and the collector of the second IGBT module S2 are connected with a power supply zero line; the emitting electrode of the first IGBT module S1, the first end portion of the inductor L and the cathode of the second power diode D2 are connected; and the emitting electrode of the second IGBT module S2, the second end portion of the inductor L and the cathode of the third power diode D3 are connected.

Description

technical field [0001] The invention relates to a single-inductance bridgeless APFC circuit based on an IGBT module in the field of single-phase power factor correction. Background technique [0002] In a single-phase power grid, an uncontrolled rectifier bridge and electrolytic capacitors are used as the power electronic converter of the front-stage circuit. No matter what kind of impedance load is connected to the rear stage, it is a nonlinear load, which will cause harmonic current pollution to the power grid and cannot meet the requirements. The harmonic current limit specified in IEC 61000-3-2 and IEC 61000-3-1, and the grid side power factor is low, so power factor correction measures must be adopted. [0003] However, the traditional bridgeless power factor corrector must use two inductors, the current flow direction is uncertain, the low-frequency diode and the diode in the IGBT module may be turned on at the same time, which increases the instability factor, and the...

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Problems solved by technology

[0004] After searching the existing technology of bridgeless power factor correctors, for example, the document "Analysis and Design of Single-phase Bridgeless Power Factor Corrector" published in the 8th issue of "Electrical Applications" in 2015 proposes a single-phase non-circulating current type Bridgeless APFC adopts single-cycle control, but this circuit is the same as the traditional bridgeless APFC,

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