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A High Voltage Gain lcl Resonant DC-DC Converter

A DC converter, resonant technology, applied in the direction of converting DC power input to DC power output, high-efficiency power electronic conversion, adjusting electrical variables, etc. energy effect

Active Publication Date: 2021-03-23
ZHONGSHAN VOLTRONIC POWERELECTRIC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to address the voltage gain G caused by the traditional LCL resonant DC-DC converter being zero in the initial state of the LCL resonance v The problem of low value, provide a high voltage gain LCL resonant DC-DC converter

Method used

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  • A High Voltage Gain lcl Resonant DC-DC Converter
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  • A High Voltage Gain lcl Resonant DC-DC Converter

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Embodiment Construction

[0036] The following combination Figure 7 A specific embodiment of the present invention is described in further detail. It is only used to illustrate rather than limit the technical solution of the present invention.

[0037] This example Figure 7 As shown, the implementation circuit of a high voltage gain LCL resonant DC-DC converter in this embodiment, it is connected with the main transformer TX 2 The rectifier circuit connected to the secondary winding is a full bridge rectifier circuit. The circuit contains a DC power supply U in , flyback transformer TX 1 and main transformer TX 2 , four power switch tubes with antiparallel diodes: the first power switch tube S 1 ~ The fourth power switch tube S 4 , a resonant capacitor C r , a resonant inductor L k , the fifth diode D 5 , with the main transformer TX 2 Four diodes connected to the secondary winding: the sixth diode D 6 ~ the ninth diode D 9 composed of a full-bridge rectifier circuit, and the output capa...

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Abstract

A high voltage gain LCL resonant DC-DC converter, including a DC power supply U in , flyback transformer TX 1 and main transformer TX 2 , the primary circuit connected to the primary windings of the two transformers, and the diode D connected to the secondary winding of the flyback transformer 5 , the rectifier circuit connected to the secondary winding of the main transformer, and the output capacitor C o and load resistor R o . The primary circuit connected to the flyback transformer and the primary winding of the main transformer includes four power switch tubes and four antiparallel diodes, a resonant capacitor C r and a resonant inductor L k . The invention moves the resonant inductance to the DC power supply side without increasing the number of power switch tubes and each power switch tube maintains the soft switching performance, thereby increasing the transferable energy in the LCL resonance stage. On the basis of retaining the resonance characteristics of the LCL, the voltage gain is improved.

Description

technical field [0001] The invention relates to an LCL resonant DC-DC converter with high voltage gain, belonging to the technical field of power electronics. Background technique [0002] High-efficiency DC-DC converter technology has always been the focus of research in the power electronics technology industry. The LCL resonant DC-DC converter can realize the zero-voltage (ZVS) turn-on of the primary side power switch tube and the zero-current (ZCS) turn-off of the secondary side diode, with high efficiency characteristics; and at the switching frequency f s equal to the resonant frequency f r Ideally, it has the property of a constant current source (see-Ma Hao, Yu Hongxia, Yan Yingyi, "Research on Current Source LCL Resonant Converter". Chinese Journal of Electrical Engineering, 2009(9): 28-34), so compare It is suitable for use in fields such as battery chargers. [0003] However, the voltage gain G of the traditional LCL resonant DC-DC converter at large current ou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335
CPCH02M3/33523H02M3/33569Y02B70/10
Inventor 袁义生梅相龙姬鹏远
Owner ZHONGSHAN VOLTRONIC POWERELECTRIC LTD
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