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A Topological Conversion Type Resonant Soft-Switching DC Converter with Multi-resonant Elements

A technology of DC converter and topology conversion, which is applied in the direction of converting DC power input to DC power output, electrical components, instruments, etc. It can solve the problems of large primary conduction loss and the inability of the converter to realize step-down conversion, etc., and achieve high gain , Increase the input voltage range, the effect of high efficiency

Active Publication Date: 2019-09-20
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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  • A Topological Conversion Type Resonant Soft-Switching DC Converter with Multi-resonant Elements
  • A Topological Conversion Type Resonant Soft-Switching DC Converter with Multi-resonant Elements
  • A Topological Conversion Type Resonant Soft-Switching DC Converter with Multi-resonant Elements

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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 topology conversion type multi-resonance element resonant soft-switching DC converter, which is composed of a bridge inverter circuit, a topology conversion multi-element resonance circuit and a diode rectifier circuit connected in sequence, and the converter is composed of the bridge inverter Transforming circuit input, output from the diode rectifier circuit after the action of the topology conversion multi-component resonant circuit; the bridge inverter circuit can realize the switching between the half bridge and the full bridge according to the switching of the switching tube; the topology conversion multi-component resonant circuit includes two A transformer to effectively broaden the power transmission capacity of the converter; the topology conversion multi-component resonant circuit can realize the switching between the LCLCL resonant circuit and the CLTCL resonant circuit through the auxiliary switch; at the same time, it can realize the zero-voltage turn-on of the switch tube and the diode of the post-stage rectification circuit The zero-current shutdown (ZCS) can reduce the circulating current, improve the efficiency and capacity of the converter, and has the advantages of wide-range adjustable input and output voltages and over-current 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 Patents(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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