High power density charging module and method based on all-digital control

A high-power density, charging module technology, applied in charging stations, electric vehicle charging technology, current collectors, etc., can solve the problems of inconvenient maintenance and trouble, and achieve the effects of easy maintenance, high power, and low switching loss.

Inactive Publication Date: 2017-09-05
STATE GRID INTELLIGENCE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Using digital control, the control algorithm inside the DSP can be changed conveniently and flexibly through can communication technology, which greatly saves debugging time and labor costs. If h

Method used

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  • High power density charging module and method based on all-digital control
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  • High power density charging module and method based on all-digital control

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0029] The block diagram of the main circuit structure of the charging module is as follows: figure 1 As shown, including: three-phase AC input circuit, input EMC filter circuit, three-phase Vienna PFC circuit and protection circuit 1, three-level LLC DC converter circuit and protection circuit 2, high-frequency rectification circuit, output EMC circuit, output anti- Reverse connection and anti-backflow circuit, pre-stage DSP28035 digital circuit and corresponding sampling circuit, post-stage DSP28035 digital circuit and corresponding sampling circuit, auxiliary source circuit 1, auxiliary source circuit 2, SCI and CAN communication circuit.

[0030] The three-phase AC input circuit, the input EMC filter circuit, the three-phase Vienna rectifier circuit, the three-level LLC DC converter circuit, the high-frequency rectifier circuit, the output EMC circu...

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Abstract

The invention discloses a high power density charging module and method based on all-digital control. A three-phase Wiener PFC circuit is subjected to double-loop control of a voltage outer loop and an AC current inner loop of a DC bus. A three-level LLC DC converter is subjected to pi control operation of the voltage and current loops. Meanwhile, the operational results of the voltage and current loops are compared in real time to determine the larger value, and the control mode thereof is used for driving the three-level LLC DC converter so that the charging module is in a constant voltage or constant current charging state. According to the invention, the miniaturized high power density of the charging module is realized by optimizing main circuit topological parameters, using control strategies and the like under the premise that the output power level is unchanged, the size of the single machine charging module is reduced, the size of the whole charging system device is thus reduced, the hardware cost and the manpower for engineering debugging are reduced, and the light weight and easy maintenance are realized.

Description

technical field [0001] The invention relates to a high power density charging module and method based on full digital control. Background technique [0002] With the promotion of electric vehicles, the application environment and occasions of the charging module have also expanded. The digital control of the charging module can achieve high-precision control and facilitate debugging and modify the control strategy to adapt to different applications. The control method is more flexible, eliminating the need for disassembly. The case has the hassle of modifying the hardware inside the module. In order to achieve high power density output, the charging module adopts a two-stage series structure. The front stage realizes the active power factor correction function, and the latter stage realizes constant voltage or constant current or constant power output. Both the pre-stage and post-stage master control adopt DSP digital control. Using digital control, the control algorithm i...

Claims

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Application Information

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IPC IPC(8): H02J7/02H02J7/04H02J7/10B60L11/18
CPCB60L53/20H02J7/022H02J7/027H02J7/045H02J7/06H02J2007/10H02J2207/20Y02T10/70Y02T10/7072Y02T10/72Y02T90/14
Inventor 唐亮刘爱忠马文超胡勇于波峰黄厚诚李新涛李勇
Owner STATE GRID INTELLIGENCE TECH CO LTD
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