Auxiliary resonant converter pole inverter with symmetrically reset phase-dependent magnetizing current

A magnetizing current, converter transformer technology, applied in the direction of converting AC power input to DC power output, converting DC power input to DC power output, adjusting electrical variables, etc., can solve the problems of increasing transformer volume, cost and leakage inductance loss, etc.

Active Publication Date: 2020-11-13
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above two methods, one coupled inductor can only realize the zero-voltage turn-on of one main switch tube, so two coupled inductors need to be used in an auxiliary circuit, thus increasing the volume, cost and leakage inductance loss of the transformer

Method used

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  • Auxiliary resonant converter pole inverter with symmetrically reset phase-dependent magnetizing current
  • Auxiliary resonant converter pole inverter with symmetrically reset phase-dependent magnetizing current
  • Auxiliary resonant converter pole inverter with symmetrically reset phase-dependent magnetizing current

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Embodiment Construction

[0266] Such as Figure 1-Figure 13As shown, the present invention provides an auxiliary resonant commutation pole inverter with symmetrical reset of the phase-related magnetization current, including a first main switching tube S1, a second main switching tube S2, a first commutating diode Dc1 and a second commutating diode Dc2 first freewheeling diode Dx1 second freewheeling diode Dx2 DC power supply VDC auxiliary power supply VAUX load first voltage dividing capacitor Cd1 and second voltage dividing capacitor Cd2 resonant inductor Lr1 resonant inductor Lr2 auxiliary converter transformer primary winding T1 auxiliary converter DC transformer secondary first winding T2 auxiliary converter transformer secondary winding T3 first auxiliary switching tube Sa1 second auxiliary switching tube Sa2 third auxiliary switching tube Sa3 fourth auxiliary switching tube Sa4 leading bridge arm AC-Lag lagging bridge arm AC-Lead excitation inductance Lm, said 1. The source of the first main sw...

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Abstract

The invention discloses an auxiliary resonant converter pole inverter with symmetrical reset of phase-associated magnetizing current. According to the circuit, the existing technology is kept througha phase correlation method, the advantage of zero-voltage switching-on of a main switch tube is achieved, the switching loss of a main switch is reduced, in addition, zero-voltage switching-on of an auxiliary switch in an auxiliary loop is achieved through energy storage in an excitation inductor, and the withstand voltage value of the auxiliary switch is far lower than that of the main switch. Magnetization current reset is reliably realized in each switching period, so that the size of the transformer is effectively reduced; and the overvoltage problem of the auxiliary converter diodes DN1 and DN2 is solved effectively by coupling of the secondary winding of the transformer.

Description

technical field [0001] The invention relates to the technical field of power electronic conversion, in particular to an auxiliary resonant commutation pole inverter with phase-correlated magnetization current symmetrically reset. Background technique [0002] The voltage source inverter (VSI), essentially a synchronous rectification buck-boost converter composed of a fully-controlled switching half-bridge, is widely used in applications of various power levels, such as: motor drives, active power filter, uninterruptible power supply (UPS), photovoltaic power system, fuel cell power system and distributed power grid, etc. The core of its research is to improve efficiency and power density. [0003] Under hard-switching conditions, power density is usually increased by increasing the switching frequency to reduce the size and weight of passive components such as filter inductors and capacitors, but increasing the switching frequency results in switching losses and high-freque...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/5387H02M3/335
CPCH02M3/33576H02M7/5387H02M1/0058Y02B70/10
Inventor 禹健安永泉马宇辉
Owner SHANXI UNIV
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