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Auxiliary resonant converter pole inverter with phase-associated magnetization current bidirectional reset function

A magnetizing current, bidirectional reset 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.

Active Publication Date: 2020-07-31
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 phase-associated magnetization current bidirectional reset function
  • Auxiliary resonant converter pole inverter with phase-associated magnetization current bidirectional reset function
  • Auxiliary resonant converter pole inverter with phase-associated magnetization current bidirectional reset function

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Embodiment Construction

[0265] Such as Figure 1-Figure 11 As shown, the invention provides an auxiliary resonant commutation pole inverter with phase-correlated magnetization current bidirectional reset, including a first main switching tube S 1 , the second main switch S 2 , the first commutation diode D c1 , the second commutation diode D c2 , DC power supply V DC , Auxiliary power supply V AUX , load Load, excitation inductance L m , the first voltage dividing capacitor C d1 and the second divider capacitor C d2 , Resonant inductance L r , Auxiliary converter transformer secondary winding T 2 , Auxiliary converter transformer secondary winding T 3 , the first auxiliary switch tube S a1 , the second auxiliary switch tube S a2 , the third auxiliary switch tube S a3 , the fourth auxiliary switch tube S a4 , leading bridge arm AC-Lag, lagging bridge arm AC-Lead; the first main switching tube S 1 The source of the second main switch S 2 The drain of the switch is connected to point O, a...

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Abstract

The invention discloses an auxiliary resonant converter pole inverter with a phase-associated magnetization current bidirectional reset function. The advantage of zero-voltage switching-on of a main switch tube is realized, and the switching loss of the main switch is reduced. In addition, an auxiliary switch in an auxiliary loop realizes zero-voltage switching-on through energy storage in an excitation inductor, and the withstand voltage value of the auxiliary switch is far less than that of the main switch. Magnetization current reset is reliably realized in each switching period, so that the size of a transformer is effectively reduced. The coupling of the secondary winding of the transformer solves the overvoltage problem of auxiliary converter diodes Dc1 and Dc2. Zero-voltage switching-on of the main switch and the auxiliary switch can be realized. Efficiency and power density are effectively improved, and cost and EMI are reduced.

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 bidirectional reset of phase-correlated magnetizing current. 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-frequ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/5387H02M3/335
CPCH02M7/5387H02M3/33576H02M1/0058Y02B70/10
Inventor 禹健马宇辉王琦张海燕王美刚高红斌
Owner SHANXI UNIV
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