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An Auxiliary Resonant Commutated Pole Inverter with Bidirectional Reset of Phase-Dependent Magnetizing Current

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

Active Publication Date: 2022-03-18
SHANXI UNIV
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  • 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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  • An Auxiliary Resonant Commutated Pole Inverter with Bidirectional Reset of Phase-Dependent Magnetizing Current
  • An Auxiliary Resonant Commutated Pole Inverter with Bidirectional Reset of Phase-Dependent Magnetizing Current
  • An Auxiliary Resonant Commutated Pole Inverter with Bidirectional Reset of Phase-Dependent Magnetizing Current

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Embodiment Construction

[0261] 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 , the second voltage dividing 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-Lead, lagging bridge arm AC-Lag; the first main switching tube S 1 The source of the second main switch S 2 The drain of the switch is connected to poi...

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Abstract

The invention discloses an auxiliary resonant commutation pole inverter with bidirectional reset of the phase-related magnetizing current, which realizes the advantages of zero-voltage turn-on of the main switching tube and reduces the switching loss of the main switch. In addition, the auxiliary switch in the auxiliary circuit, The zero-voltage turn-on is also realized through the energy storage in the magnetizing inductance, and its withstand voltage value is much smaller than that of the main switch; and the magnetizing current reset is reliably realized in each switching cycle, which effectively reduces the volume of the transformer; the secondary side of the transformer Winding coupling solves the auxiliary commutation diode D c1 and D c2 overvoltage problem. The zero-voltage turn-on of the main switch and the auxiliary switch can be realized; the efficiency and power density can be effectively improved, and the cost and EMI can be 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 is essentially a synchronous rectification buck-boost converter composed of a fully-controlled switching half-bridge, which is widely used in applications of various power levels, such as: motor drives, active power filters , 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, the power density is usually increased by reducing the size and weight of passive components (such as filter inductors and capacitors) by increasing the switching frequency, but increasing the switching frequency will lead to an increase in ...

Claims

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Application Information

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Patent Type & Authority Patents(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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