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igbt series dynamic voltage equalization control circuit and device

A dynamic voltage equalization and control circuit technology, applied in emergency protection circuit devices, output power conversion devices, electrical components, etc., can solve problems such as voltage imbalance of series devices and potential safety hazards, and achieve the effect of improving safety.

Active Publication Date: 2021-05-11
SHENZHEN POWER SUPPLY BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide an IGBT series dynamic voltage equalization control circuit and device for the existing IGBT series connection, due to the different device parameters, the voltage of the series device is unbalanced, and there is a potential safety hazard.

Method used

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  • igbt series dynamic voltage equalization control circuit and device
  • igbt series dynamic voltage equalization control circuit and device
  • igbt series dynamic voltage equalization control circuit and device

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Embodiment Construction

[0064] In order to make the above purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific implementation disclosed below.

[0065] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another elemen...

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Abstract

The application provides an IGBT series dynamic voltage equalization control circuit and device, including a plurality of IGBT tubes connected in series in sequence, a first voltage equalization circuit, an automatic switching circuit, a second voltage equalization circuit, a light-emitting component, a pulse width modulator and controller. A first voltage equalizing circuit is connected in parallel to both ends of the collector and the emitter of each IGBT tube. Both ends of each first equalizing circuit are connected in parallel with an automatic switching circuit. Both ends of each automatic switching circuit are connected in parallel with a second voltage equalizing circuit, and the automatic switching circuit is used to control whether the second voltage equalizing circuit works according to the overvoltage at both ends of the IGBT tube. Both ends of each second voltage equalizing circuit are connected in parallel with a light-emitting component. The gate of each IGBT tube is electrically connected to the output terminal of the pulse width modulator. Each light-emitting component is electrically connected to the controller, and the controller is used to determine the light-emitting component that emits light first among the various light-emitting components, and adjusts the conduction time of the IGBT tube corresponding to the light-emitting component that emits light first through the pulse width modulator.

Description

technical field [0001] The present application relates to the technical field of power electronics, in particular to an IGBT series dynamic voltage equalization control circuit and device. Background technique [0002] In a large number of high-voltage devices using power electronic technology systems, a single IGBT cannot meet the requirements, and must be composed of multiple IGBTs in series. For example, the large-capacity flexible direct current transmission system, its voltage often reaches hundreds of kilovolts, and the converter valve is composed of high-power IGBTs in series, and the number of valve section devices connected in series is composed of IGBTs of different capacities in series according to the transmission voltage. Large-capacity inverters and dynamic reactive power compensation circuits often use IGBT series structures. [0003] However, when the IGBTs are connected in series, due to the different static parameters caused by the semiconductor process of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/088H02H7/12
CPCH02H7/12H02M1/088
Inventor 罗欣儿田杰余鹏
Owner SHENZHEN POWER SUPPLY BUREAU
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