Power conversion device
A power conversion device and power semiconductor technology, applied in the direction of conversion equipment with intermediate conversion to AC, can solve the problem of affecting the stability and safety of the power supply system, unfavorable production, assembly and maintenance, and affecting the performance of auxiliary converters, etc. problems, to achieve the effect of facilitating later maintenance and replacement, improving stability and safety, and simplifying the structure
Pending Publication Date: 2019-09-27
CHINA RAILWAYS CORPORATION +3
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Problems solved by technology
[0004] At present, the auxiliary converter using the intermediate frequency transformer isolation technology has the problems of low integration and complicated connection relationship between devices, which affects the performance of the auxiliary converter, which in turn affects the stability and safety of the power supply system, and the integrated The degree of modernization is low, which is not conducive to production, assembly and maintenance
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[0047] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0048]Considering the problems of low integration level and complex connection relationship between devices existing in the existing auxiliary converters isolated by intermediate frequency transformers, the present application provides a power conversion device, including: the inverter unit, which is used to The input direct current is conver...
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The invention provides a power conversion device including an inverter unit for converting the input DC power into AC power and outputting the AC power; a rectifying unit for converting the AC power output by the inverter unit into DC power; a front-stage boosting unit for adjusting the voltage value of the DC power input to the inverter unit; a resonance unit for performing voltage conversion and electrical isolation under the excitation of the AC voltage output by the inverter unit. The front-stage boosting unit, the inverter unit, the resonance unit, and the rectifying unit are arranged successively in this order. The front-stage boosting unit, the inverter unit and the rectifying unit are arranged at an air inlet. The resonance unit is arranged at an air outlet so that the power conversion device forms a U-shaped layout. The power conversion device can improve the working frequency and working efficiency of an auxiliary converter, is reduced in volume and weight, improves the stability and safety of a power supply system, has a compact structure, can improve the integration level, and is convenient in later maintenance and replacement.
Description
technical field [0001] The invention relates to the technical field of rail transit vehicle equipment, in particular to a power conversion device. Background technique [0002] Auxiliary converter is an important part of rail vehicle power supply system, which undertakes the power supply task of all auxiliary equipment except traction main circuit. Auxiliary equipment includes: vehicle control system, lighting system, ventilation and air conditioning system, vehicle battery, etc. Among these systems, some provide the necessary guarantee for the normal operation of the train, and some provide passengers with a comfortable riding environment. The reliability of the power supply system of the equipment has high requirements. [0003] The isolation methods of auxiliary converters usually include power frequency transformer isolation and intermediate frequency transformer isolation. The power frequency transformer isolation method is to directly invert the DC input voltage afte...
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IPC IPC(8): H02M3/28
CPCH02M3/28
Inventor 刘阳马颖涛董侃史志富刘伟志邱腾飞宋术全程建华杨二林李水昌
Owner CHINA RAILWAYS CORPORATION