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An Auxiliary Resonant Commutated Pole Inverter with Phase-Linked ZVT Magnetization Current Minimization

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

Active Publication Date: 2022-03-18
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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  • An Auxiliary Resonant Commutated Pole Inverter with Phase-Linked ZVT Magnetization Current Minimization
  • An Auxiliary Resonant Commutated Pole Inverter with Phase-Linked ZVT Magnetization Current Minimization
  • An Auxiliary Resonant Commutated Pole Inverter with Phase-Linked ZVT Magnetization Current Minimization

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Embodiment Construction

[0268] Such as Figure 1-Figure 12 As shown, the present invention provides an auxiliary resonant commutation pole inverter with phase-correlated ZVT magnetization current minimization, 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 t...

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Abstract

The invention discloses an auxiliary resonant commutation pole inverter with phase-correlated ZVT magnetization current minimization, which includes a main circuit and an auxiliary circuit; the phase-shifting full-bridge network charges the auxiliary resonant pole inductance through an isolation transformer to realize the main switch. ZVS; the energy storage in the magnetizing inductance realizes the ZVS of the auxiliary switch. The commutation charging phase is anti-correlated with the reset phase locking, which realizes the bidirectional reset of the magnetizing current and reduces the volume of the magnetic core. The improved timing modulation effectively reduces the freewheeling loss of the magnetizing current and the turn-off loss of the auxiliary switch. Using the phase correlation method to maintain the existing technology, realize the advantages of zero-voltage turn-on of the main switch tube, reduce the switching loss of the main switch, in addition, the auxiliary switch in the auxiliary circuit also realizes zero-voltage turn-on through the energy storage in the excitation 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, and the secondary winding coupling of the transformer solves the problem of the auxiliary commutation diode D c1 and D c2 overvoltage problem.

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 ZVT magnetization current minimization. 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 by increasing the switching frequency, but increasing the switching frequency will lead to an increase in switching loss and high-frequency electromagne...

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 禹健安永泉张海燕王琦高红斌王美刚
Owner SHANXI UNIV
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