High-gain DC-DC converter based on double coupling inductors
A technology of DC-DC and coupled inductance, which is applied in the direction of adjusting electric variable, converting device of output power, converting DC power input to DC power output, etc. It can solve the problem of insufficient step-up capability of single-stage switched capacitors, and avoid voltage Effects of spikes, loss reduction, and voltage stress reduction
Active Publication Date: 2019-12-13
FUZHOU UNIV
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Problems solved by technology
[0005] The purpose of the present invention is to provide a high-gain DC-DC converter based on dual coupled inductors, which solves the defect of insufficient boosting capability of single-stage switched capacitors, and absorbs the leakage inductance energy of the coupled inductors through the clamping circuit at the same time, avoiding The excessive voltage spike of the switching device reduces the voltage stress of the switching device and reduces the loss of the converter
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[0015] The technical solution of the present invention will be specifically described below in conjunction with the accompanying drawings.
[0016] The present invention provides a high-gain DC-DC converter based on dual coupled inductors, including a DC input power supply, a first coupled inductor, a second coupled inductor, a first switching tube, a second switching tube, a third switching tube, a A diode, a second diode, a third diode, a fourth diode, a fifth diode, a first inductor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a The fifth capacitor, the sixth capacitor, the seventh capacitor and the load; the positive pole of the DC input power supply is connected to one end of the second switching tube and one end of the primary winding of the first coupling inductor, and the negative pole of the DC input power supply is connected to the primary winding of the second coupling inductor One end of the first switching tube is connected to one...
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The invention relates to a high-gain DC-DC converter based on double coupling inductors. The converter comprises a DC input power supply, a first coupling inductor, a second coupling inductor, a firstswitch tube, a second switch tube, a third switch tube, a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a first inductor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor and a load. By using the double-coupling inductance high-gain DC-DC converter, coupling inductance transformation ratio boosting, an LCD boosting network, a capacitor-diode boosting network and the like are combined with a clamping circuit so that electrical isolation, a high voltage rise ratio, a low voltage stress, high conversion efficiency and the like of the converter are realized, and the converter is very suitable for high voltage rise ratio and DC voltage conversion application occasions.
Description
technical field [0001] The invention relates to the technical field of power electronics, in particular to a high-gain DC-DC converter based on double coupled inductors. Background technique [0002] In recent years, new energy represented by photovoltaic systems, uninterruptible power supplies, wind power and fuel cells has played an increasingly important role in the industrial field. However, due to the low DC output voltage level of a single fuel cell or photovoltaic cell, it cannot meet the voltage level requirements of the DC side of the grid-connected inverter for a 220V AC grid. Therefore, it is necessary to add a high gain at the front end of the DC bus side of the power generation system. DC-DC converters are used to increase the voltage level to ensure that the power generation system injects the generated electric energy into the distribution network. [0003] Traditional high-gain DC-DC converters realize various boost functions by adjusting the turns ratio of ...
Claims
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IPC IPC(8): H02M3/335H02M1/34
CPCH02M1/34H02M3/33569H02M1/344
Inventor 林国庆黄毅敏
Owner FUZHOU UNIV