Auxiliary resonant converter pole inverter of phase-associated voltage-regulator tube clamp

A technology of converter transformers and voltage regulator tubes, which is applied in the direction of output power conversion devices, conversion of AC power input into DC power output, and conversion of DC power input into DC power output, etc., which can solve the problem of increasing transformer volume, cost and leakage inductance Loss and other issues

Active Publication Date: 2020-07-31
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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  • Auxiliary resonant converter pole inverter of phase-associated voltage-regulator tube clamp
  • Auxiliary resonant converter pole inverter of phase-associated voltage-regulator tube clamp
  • Auxiliary resonant converter pole inverter of phase-associated voltage-regulator tube clamp

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Embodiment Construction

[0266] like Figure 1-Figure 13As shown, the invention provides an auxiliary resonant commutation pole inverter clamped by a phase-correlated Zener tube, which includes a first main switching tube S1, a second main switching tube S2, a first commutating diode Dc1, and a second main switching tube S2. Two commutation diode Dc2, DC power supply VDC, auxiliary power supply VAUX, load 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 The first winding T2 on the secondary side of the current transformer, the second winding T3 on the secondary side of the auxiliary converter transformer, the first freewheeling diode Dx1, the second freewheeling diode Dx2, the first zener diode Dz1, the second zener diode Dz2, the first Auxiliary switching tube Sa1, second auxiliary switching tube Sa2, third auxiliary switching tube Sa3, fourth auxi...

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Abstract

The invention discloses an auxiliary resonant converter pole inverter of a phase-associated voltage-regulator tube clamp. The auxiliary resonant converter pole inverter comprises a main circuit and anauxiliary circuit; a phase-shifted full-bridge network charges an auxiliary resonance electrode inductor through an isolation transformer to realize ZVS of the main switch; ZVS of the auxiliary switch is realized through energy storage in an excitation inductor. The commutation charging phase and the reset phase are locked and inversely associated, so that magnetization current bidirectional reset is realized, and the volume of the magnetic core is reduced. The voltage-regulator tube clamp effectively protects auxiliary converter diodes. According to the circuit, the existing technology is maintained by using a phase correlation method; zero-voltage switching-on of the main switch and the auxiliary switch is achieved; switching loss of the main switch is reduced; efficiency and power density are effectively improved; cost and EMI are reduced; in addition, zero-voltage switching-on of the auxiliary switch in the auxiliary loop is achieved through energy storage in the excitation inductor, and the withstand voltage value of the auxiliary switch is far smaller than that of the main switch; the coupling of the secondary winding of the transformer solves the overvoltage problem of theauxiliary converter diodes Dc1 and Dc2.

Description

technical field [0001] The invention relates to the technical field of power electronic conversion, in particular to an auxiliary resonant commutation pole inverter clamped by a phase-correlated voltage regulator tube. 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-frequency electro...

Claims

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Application Information

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IPC IPC(8): H02M7/5387H02M3/335
CPCH02M7/5387H02M3/33576H02M1/0058Y02B70/10
Inventor 禹健安永泉
Owner SHANXI UNIV
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