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IGBT collector-emitter saturation voltage detection device

A voltage detection and emitter technology, applied in the detection field, can solve the problem of collector-emitter that has not been automatically measured for IGBT

Pending Publication Date: 2021-07-06
BEIJING RAILWAY INST OF MECHANICAL & ELECTRICAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, there is currently no device for automatically measuring the saturation voltage between the collector and emitter of an IGBT

Method used

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  • IGBT collector-emitter saturation voltage detection device
  • IGBT collector-emitter saturation voltage detection device
  • IGBT collector-emitter saturation voltage detection device

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Embodiment Construction

[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

[0038] figure 1 A schematic structural diagram of an IGBT collector-emitter saturation voltage detection device provided for an embodiment of the present invention, refer to figure 1 The IGBT collector-emitter saturation voltage detection device includes: an energy storage module 01, a discharge control module 02, a trigger module 03, a current sampling module 04, a current setting comparison module 05, and a sample and hold module 06;

[0039] The first end of the discharge control module 02 is electrically conn...

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Abstract

The invention discloses an IGBT collector-emitter saturation voltage detection device, a first output end of a trigger module of the device is electrically connected with a control end of a discharge control module, a second output end of the trigger module is electrically connected with a base electrode of an IGBT, and the trigger module is used for sending a trigger signal to the discharge control module and the IGBT and controls the energy storage module to discharge to the IGBT through the discharge control module; the current setting comparison module is used for outputting a trigger signal to the trigger module according to the magnitude relationship between the current collected by the current sampling module and the set current; the trigger module is used for sending a sampling and holding signal to the sampling and holding module according to the trigger signal; and the sampling and holding module is used for outputting a voltage difference value between a collector electrode and an emitter electrode of the IGBT when receiving the sampling and holding signal. According to the invention, the saturation voltage of the collector electrode-emitter electrode of the IGBT can be obtained only by controlling the trigger module to send the trigger signal to the discharge control module and the IGBT, the intervention of operators is not needed in the process, the automation of the detection process is realized, and the operation efficiency is improved.

Description

technical field [0001] The embodiments of the present invention relate to the field of detection technology, in particular to a collector-emitter saturation voltage detection device of an IGBT. Background technique [0002] IGBT (Insulated Gate Bipolar Transistor, Insulated Gate Bipolar Transistor), as a power conversion device, is one of the most important electrical components on AC drive harmonious locomotives and high-speed EMUs. Whether it works normally or not will directly affect the safety of railway traffic. [0003] However, there is currently no device for automatically measuring the collector-emitter saturation voltage of an IGBT. Contents of the invention [0004] The invention provides an IGBT collector-emitter saturation voltage detection device to realize automatic measurement of the IGBT collector-emitter saturation voltage. [0005] An embodiment of the present invention provides an IGBT collector-emitter saturation voltage detection device, including: ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/26
CPCG01R31/2608
Inventor 黎莎喻贵忠
Owner BEIJING RAILWAY INST OF MECHANICAL & ELECTRICAL ENG
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