Fuel cell wide-range input type quasi-Z-source switch capacitor boost-type DC converter

A DC converter and fuel cell technology, which is applied in the direction of converting DC power input to DC power output, adjusting electrical variables, and converting devices for output power, etc., can solve the problem of high voltage gain, large voltage stress, increased switching loss and electromagnetic interference and other problems, to achieve the effect of continuous input current
CN106877657AInactive Publication Date: 2017-06-20TIANJIN UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
TIANJIN UNIV
Publication Date
2017-06-20
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a fuel cell wide-range input type quasi-Z-source switch capacitor boost-type DC converter. The DC converter is based on a quasi-Z-source network and a switch capacitor network. The power input end of the DC converter is connected with a fuel cell, which is embodied by connecting the power input end Uin with a diode D1 capable of preventing current reversal in series; the front stage is the quasi-Z-source network, which is formed by an inductor L1, a diode D2, an inductor L2, a capacitor C1 and a capacitor C2; the back stage is the switch capacitor network, which is formed by a capacitor C3, a capacitor C4, a capacitor C5, a diode D3, a diode D4 and a diode D5; and an output end is connected with a high-voltage DC bus. The DC converter improves topology boosting capability and reduces voltage stress born by a power device, and is more suitable for voltage conversion occasions of the fuel cell.
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Description

technical field

[0001] The invention relates to the technical field of power electronic power conversion, in particular to a wide-range input type quasi-Z source switched capacitor step-up DC converter for fuel cells, which belongs to the application occasion of fuel cell unidirectional step-up DC converters. Background technique

[0002] With the massive exploitation and utilization of fossil fuels, a series of energy problems and environmental problems have been triggered. People are eager to develop renewable clean energy to improve environmental problems and alleviate the energy crisis. At the same time, with the rapid increase in the number of automobiles in the world, the demand for fossil fuels (petroleum) in the automobile industry cannot be ignored. Automobiles consume a large amount of gasoline and diesel, and the exhaust gas produced is discharged into the atmosphere, causing serious air pollution.

[0003] In recent years, the world has vigorously supported the ...

Claims

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