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Topological conversion type multi-resonance element resonance soft switch direct current converter

A technology of DC converter and topology conversion, applied in the direction of converting DC power input to DC power output, electrical components, instruments, etc., can solve the problems that the converter cannot realize step-down conversion, large primary conduction loss, etc. Effect of Input Voltage Range, High Gain, and Wide Voltage Gain Range

Active Publication Date: 2017-09-22
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this converter cannot implement step-down conversion
In addition, the auxiliary switch used to control the auxiliary transformer is arranged on the primary low-voltage side, where the primary current is much larger than the current on the secondary side, resulting in large primary conduction losses

Method used

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  • Topological conversion type multi-resonance element resonance soft switch direct current converter
  • Topological conversion type multi-resonance element resonance soft switch direct current converter
  • Topological conversion type multi-resonance element resonance soft switch direct current converter

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings. In order to make the description concise and convenient, the English characters that appear below have the following meanings: ZVS means zero-voltage turn-on; ZCS means zero-current turn-off; LCLCL means inductance, capacitance, inductance, A resonant circuit composed of capacitors and inductors; CLTCL represents a resonant circuit composed of capacitors, inductors, transformers, capacitors, and inductors.

[0028] Such as figure 1 As shown, a topology conversion type multi-resonance element resonant soft-switching DC converter is composed of a bridge inverter circuit, a topology conversion type multi-element resonance circuit and a diode rectifier circuit connected in sequence. The converter is composed of the bridge inverter The circuit input is output from the diode rectifier circuit after the action of the topology conversion multi-component resonant circuit; the bri...

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Abstract

The invention discloses a topological conversion type multi-resonance element resonance soft switch direct current converter. The topological conversion type multi-resonance element resonant soft switch direct current converter consists of a bridge type inversion circuit, a topological conversion type multi-element resonance circuit and a diode rectifying circuit which are connected in sequence; the converter is input from the bridge type inversion circuit, passes through the topological conversion type multi-element resonance circuit and then is output from the diode rectifying circuit; the bridge type inversion circuit can realize switching of half bridge and full bridge according to the switching of a switching tube; the topological conversion type multi-element resonance circuit comprises two transformers, so that the power transmission performance of the converter can be expanded effectively; by virtue of the topological conversion type multi-element resonance circuit, switching of an LCLCL resonance circuit and a CLTCL resonance circuit can be realized through an auxiliary switch; meanwhile, zero-voltage switch-on of the switching tube and zero-current switch-off (ZCS) of a back-stage rectifying circuit diode can be realized, ring current can be reduced, and efficiency and capacity of the converter can be improved; and the direct current converter has the advantages of wide range adjustment of the input and output voltages and overcurrent protection.

Description

technical field [0001] The invention relates to a resonant soft-switching direct current converter, in particular to a high-efficiency, wide voltage range topology transformation type multi-resonance element resonant soft-switching direct current converter. Background technique [0002] Small wind power generation is a potential household renewable energy power generation system, which has the advantages of easy installation, flexible power levels, and low maintenance costs. Compared with the off-grid small wind power generation system, the grid-connected small wind power generation system has a wider application field, and the grid-connected small wind power generation system can convert wind energy into AC energy. However, due to the low average wind speed and obvious fluctuations in the small wind power generation system, it will be difficult for the system to maintain a stable grid-connected output. The main reason for this kind of problem is that it cannot provide enou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
CPCH02M3/3353H02M1/0058Y02B70/10
Inventor 王议锋崔玉璐杨良钟旭王彤
Owner TIANJIN UNIV
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