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Auxiliary resonant commutated pole inverter with symmetrical reset of phase-correlated magnetizing current

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 and reducing switching loss

Active Publication Date: 2021-11-19
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 commutated pole inverter with symmetrical reset of phase-correlated magnetizing current
  • Auxiliary resonant commutated pole inverter with symmetrical reset of phase-correlated magnetizing current
  • Auxiliary resonant commutated pole inverter with symmetrical reset of phase-correlated magnetizing current

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Embodiment Construction

[0246] The invention provides an auxiliary resonant commutation pole inverter with symmetrical reset of phase-related magnetization current,

[0247] Including the first main switch S 1 , the second main switch S 2 , the first commutation diode D c1 , the second commutation diode D c2 , the first freewheeling diode D x1 , the second freewheeling diode D x2 , DC power supply V DC , Auxiliary power supply V AUX , load Load, the first voltage divider capacitor C d1 , and the second voltage dividing capacitor C d2 , Resonant inductance L r1 , Resonant inductance L r2 , Auxiliary converter transformer primary winding T 1 , 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, exciting inductance L m...

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Abstract

The invention discloses an auxiliary resonant commutation pole inverter in which the phase-correlated magnetization current is symmetrically reset. The circuit of the invention maintains the prior art by using the phase-correlation method, realizes the advantages of zero-voltage turn-on of the main switching tube, and reduces the 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 , which effectively reduces the volume of the transformer; the secondary winding coupling of the transformer solves the problem of the auxiliary commutation diode D N1 and D N2 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 magnetization current symmetrically reset. Background technique [0002] The voltage source inverter is essentially a synchronous rectification buck-boost converter composed of a fully-controlled switching half-bridge. It is widely used in applications of various power levels, such as: motor drives, active power filters, Uninterruptible power supply, 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 increasing the switching frequency to reduce the size and weight of passive components such as filter inductors and capacitors, but increasing the switching frequency will lead to an increase in switching losses ...

Claims

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Application Information

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Patent Type & Authority Patents(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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