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Large-power multi-phase structure bridge impedance network DC/DC converter and control method

A multi-phase structure and impedance network technology, applied in the direction of converting DC power input to DC power output, output power conversion device, and adjusting electrical variables, can solve the problem of low fuel cell power, improve conversion efficiency, and maintain efficiency , run flexible effects

Pending Publication Date: 2019-03-19
北京中科绿能科技有限公司
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  • Description
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  • Application Information

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Problems solved by technology

[0005] In view of this, the present application provides a high-power polyphase structure bridge-type impedance network DC / DC converter and a control method to solve the problem of low power of existing fuel cells

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  • Large-power multi-phase structure bridge impedance network DC/DC converter and control method

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Embodiment Construction

[0015] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0016] The technical solutions provided by various embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

[0017] The fuel cell vehicle power system configuration is as follows: figure 1 As shown, the system consists of a fuel cell engine (FCE), a DC / DC converter, a battery (Battery), ...

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Abstract

The invention discloses a large-power multi-phase structure bridge impedance network DC / DC converter and a control method. A parallel DC / DC converter comprises a power supply V1, a power supply V2, and N power conversion units. The N power conversion units are connected in parallel. The positive electrode of the power supply V1 is connected with the positive electrodes of the input ends of the N power conversion units, and the negative electrode of the power supply V1 is connected with the negative electrodes of the input ends of the N power conversion units. The positive electrode of the power supply V2 is connected with the positive electrodes of the output ends of the N power conversion units, and the negative electrode of the power supply V2 is connected with the negative electrodes ofthe output ends of the N power conversion units. The control method achieves the series resonance, parallel resonance, bidirectional power flow and unidirectional power flow of the DC / DC convert. A power switch has a soft operation environment, and achieves the bidirectional power flow operation of energy. Meanwhile, the converter is high in boost multiple, and is high in efficiency.

Description

technical field [0001] The present application relates to the field of fuel cell power generation systems, in particular to a parallel DC / DC converter and a control method. Background technique [0002] In recent years, due to environmental pollution and energy security considerations, the research and development of electric vehicles has developed rapidly. Electric vehicles include three categories: pure electric vehicles, hybrid vehicles and fuel cell electric vehicles. Fuel cell electric vehicles are considered to be the ultimate development direction of electric vehicles in the 21st century. At present, there is an upsurge of research and development of fuel cell electric vehicles in domestic and foreign business circles. DC / DC converter is a key technology of fuel cell electric vehicles. [0003] Fuel cells in the prior art generally use low-voltage and high-current systems, so the fuel cell DC / DC converter requires a very high boost ratio (greater than 10 times), and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/158
CPCH02M3/158H02M3/1582Y02B70/10
Inventor 许海平原增泉温平平
Owner 北京中科绿能科技有限公司
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