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Power converter and its control method

A power converter and converter technology, applied in the direction of converting DC power input to DC power output, AC power input converting to DC power output, output power conversion device, etc., can solve the problem of low power conversion efficiency and power converter control. The method is not flexible enough, etc.

Active Publication Date: 2021-04-27
DELTA ELECTRONICS (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present disclosure aims to provide an improved two-stage topology power converter and its control method to solve the problems of inflexible control mode and low power conversion efficiency of the power converter used in the ground charger of electric vehicles

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  • Power converter and its control method
  • Power converter and its control method
  • Power converter and its control method

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Embodiment Construction

[0048] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of example embodiments. communicated to those skilled in the art. In the drawings, the size of some elements may be exaggerated or deformed for clarity. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.

[0049] Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the present disclosure. However, one skilled in the art...

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Abstract

The present disclosure proposes a power converter and a method for controlling the power converter. The power converter includes a PFC rectification module and a DC-DC conversion module. The method includes: when the output voltage of the power converter is greater than or equal to the minimum limit value of the bus voltage output by the PFC rectifier module, controlling the DC-DC conversion module to work in a normally on state, and then the bus voltage output by the PFC rectifier module according to the specified Adjust the output voltage of the power converter; when the output voltage of the power converter is less than the minimum limit of the bus voltage output by the PFC rectifier module, control the DC-DC conversion module to work in the voltage regulation state, then the PFC rectifier module outputs a constant bus Voltage. By switching the control strategy of the power converter, the conversion efficiency of the power converter can be improved.

Description

technical field [0001] The present disclosure relates to the field of circuits, and more particularly, to a power converter and a control method thereof. Background technique [0002] Due to the advantages of environmental protection, cleanliness and energy saving, electric vehicles have been widely popularized in recent years. The main bottleneck in the development of electric vehicles lies in batteries. In order to meet the needs of electric vehicles, on-board batteries need to meet the requirements of high specific energy and high specific power. At the same time, stable, efficient and fast charging technology is also crucial. According to different placement locations, electric vehicle chargers can be divided into on-board chargers and ground chargers. The ground charger, also known as a DC charger, uses a DC charging mode to charge the power battery assembly of an electric vehicle. The output voltage and current can be adjusted in a large range, and can provide a charg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/217H02M1/42H02M3/158
CPCH02M7/217H02M1/4233H02M3/1584B60L53/30B60L53/60B60L2210/12H02M1/44H02M3/1588H02M7/219H02J2207/20H02J7/00Y02T10/72Y02T10/92Y02T10/70Y02T10/7072Y02T90/12H02M1/0054H02M1/007H02M1/08H02M3/33576B60Y2300/91B60Y2200/91
Inventor 言超陆益文孙丽萍丁志辉黄琪
Owner DELTA ELECTRONICS (SHANGHAI) CO LTD