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Active discharging method of power converter and controller

A technology of power converter and conversion circuit, which is applied in the direction of converting AC power input into DC power output, output power conversion device, electrical components, etc., which can solve problems such as electric shock for staff, avoid maintenance electric shock, realize energy consumption, Effect of size and cost advantages

Active Publication Date: 2021-11-02
合肥阳光电动力科技有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

If maintenance work is performed on the power converter at this time, the staff will be in danger of electric shock

Method used

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  • Active discharging method of power converter and controller
  • Active discharging method of power converter and controller
  • Active discharging method of power converter and controller

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Embodiment Construction

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. 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.

[0046] In this application, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes none. other elements specifically listed, or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "com...

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Abstract

The invention provides an active discharging method of a power converter and a controller, and the method comprises the steps: controlling at least two conversion circuits in the power converter to work cooperatively after an active discharging instruction is received, so as to discharge a capacitor in the power converter through a discharging circuit; namely, through the cooperative work of the at least two conversion circuits, energy consumption on the capacitor is realized, and maintenance electric shock is further avoided; moreover, no hardware circuit needs to be added, and the method has the advantages of size and cost. Besides, the redundant discharge mode and the conversion circuit discharge mode are executed at the same time or are standby for each other, the redundant processing of active discharge can be realized, discharge failure caused by failure of any discharge mode is avoided, the discharge function of the capacitor can still be completed after failure of any discharge mode, high-voltage safety is realized, and the reliability of active discharge is improved.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to an active discharge method and a controller of a power converter. Background technique [0002] For power converters powered by high-voltage batteries, such as power converters in electric vehicles, there is a high-voltage energy storage device-high-voltage capacitor between the positive and negative poles of the DC bus, such as figure 1 The capacitance Cbk shown in , and because the power converter has a boost circuit, it also includes the capacitor CBUS at the output end of each boost circuit. When the high-voltage battery is powered off, if the two capacitors Cbk and CBUS are not discharged, the corresponding voltage will last for a certain period of time. If maintenance work is performed on the power converter at this time, the staff will be in danger of electric shock. Therefore, after the high-voltage battery of the vehicle is powered off, its capacitor should b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/32H02M7/5387
CPCH02M1/32H02M7/53871Y02T10/70
Inventor 杜恩利张震
Owner 合肥阳光电动力科技有限公司
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