A high voltage gain dc-dc converter

A DC converter, DC-DC technology, applied in the direction of converting DC power input to DC power output, adjusting electrical variables, instruments, etc., can solve the problems of high converter gain, not high gain, large current stress, etc. gain, increasing static gain, reducing the effect of voltage stress
CN113394975BActive Publication Date: 2022-08-05南京赛格米勒电气有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
南京赛格米勒电气有限公司
Publication Date
2022-08-05

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Abstract

The invention discloses a high-voltage gain DC-DC converter, comprising a DC power supply, a power switch tube, a three-winding coupled inductance, a capacitor and an output circuit; it controls the on or off of the power switch tube to control the switching of the working state of the circuit, In this way, it is controlled whether the DC power supply provides the energy required for circuit operation to the coupled inductor and capacitor. By changing the duty cycle of the control power switch and the turns ratio of the coupled winding, the change of the input and output voltage gain is realized, which is output by the output circuit. The present invention realizes the boost conversion of the output voltage to the DC power supply voltage by changing the turns ratio of the three-winding coupled inductance, which can effectively avoid the situation of the limit duty cycle, and use a smaller duty cycle to achieve high output voltage. Conversion function; because the structure of the present invention can effectively reduce the voltage stress of the device in the circuit, reduce the loss, and improve the overall working efficiency of the circuit.
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Description

technical field

[0001] The invention belongs to the technical field of DC-DC conversion equipment, and in particular relates to a high-voltage gain DC-DC converter. Background technique

[0002] At present, high-gain DC-DC boost converters are widely used in new energy fields, including photovoltaic systems, wind power generation, fuel cells, etc. However, the DC voltage level generated by resources such as photovoltaics and FCs is low, which is not suitable for grid integration. In view of the above mentioned problems, high boost DC-DC converters are required to increase the output DC voltage level of such resources.

[0003] In recent years, various boost DC-DC converters with boost technology have been proposed. Isolation converters utilize transformers with large turns ratios, which have higher voltage conversion ratios. However, an excessively large turns ratio will lead to excessive leakage inductance, thereby reducing converter efficiency and increasing switching v...

Claims

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