Energy feedback power unit

A technology of power unit and energy feedback, which is applied in the direction of output power conversion device, conversion of AC power input to AC power output, conversion of AC power input to DC power output, etc. Complicated structure and other problems, to achieve good promotion and application prospects, reduce harmonic pollution, and simple device structure
CN1949645AActive Publication Date: 2007-04-18北京合康新能变频技术有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
北京合康新能变频技术有限公司
Publication Date
2007-04-18

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Abstract

The invention is an energy feedback power unit used in series power unit-type high voltage inverter and implementing four-quadrant operating ability, and its control circuit comprises: filter circuit composed of three-phase capacitors and three-phase reactors, three-phase synchronous rectifier bridge composed of IGBTs, DC filter circuit composed of capacitors, unit inverter bridge composed of IGBTs, and synchronous rectification control circuit and unit inversion control circuit controlling the operating states of the three-phase synchronous rectifier bridge and unit inverter bridge, respectively. And it has rectifying and energy feedback functions, and simple structure, low losses, easy to implement, low-cost, having high power factor but no harmonic pollution to electric network. And the high voltage transformer composed by it has all functional characteristics of common high voltage transformers and ability to convert kinetic energy or potential energy into electric power to feed back to the electric network on the conditions of fast system braking or weight dropping.
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Description

technical field

[0001] The invention relates to a main component of a high-voltage frequency converter, specifically, an energy feedback power unit for a high-voltage frequency converter of series power unit type and capable of four-quadrant operation; it belongs to the technical field of power electronic equipment. Background technique

[0002] The frequency converter is a power conversion device that converts the power frequency power supply into an adjustable frequency by using the on and off functions of semiconductor power devices. The device first converts the electric energy of the AC power supply into DC power, and then converts the DC power into AC power with variable frequency to drive the load. With the rapid development of microelectronics and power electronics technology, as a product of the development of power electronics technology in the 21st century, high-voltage frequency converters have been widely used in many fields of the national economy (such as ther...

Claims

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