Multipath power supply detection method and circuit

A multi-channel power supply and detection circuit technology, applied in the field of detection circuits, can solve the problems of high cost of detection circuits, inability to fully understand the working status of IGBTs, increase product costs, etc., and achieve the effect of reducing costs

Inactive Publication Date: 2018-05-08
ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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  • Abstract
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Problems solved by technology

Using the isolation device solution will increase the cost of the product, and only detecting one drive power supply cannot fully understand the working status of the IGBT, and cannot protect the IGBT module in a timely and eff

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  • Multipath power supply detection method and circuit
  • Multipath power supply detection method and circuit
  • Multipath power supply detection method and circuit

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Embodiment Construction

[0024] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0025] It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate ...

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Abstract

The present invention discloses a multipath power supply detection method and circuit The method comprises the steps of: difference sampling of voltages of a multipath power supply through a pluralityof difference sampling circuits, and obtaining a plurality of sampling voltage values, wherein the difference sampling circuits are in one-to-one correspondence with the multipath power supply; determining whether one voltage of each power supply exceeds a preset voltage range or not according to determination of whether each sampling voltage exceeds the corresponding sampling voltage range or not, and obtaining a plurality of determination results; and determining whether there is a power supply exceeds a preset voltage range or not in the multipath power supply according to the determination results. The technical problem is solved that a detection circuit configured to detect not common-ground is high in cost in the prior art.

Description

technical field [0001] The invention relates to the field of detection circuits, in particular to a detection method and circuit for multi-channel power supplies. Background technique [0002] In some cases, multiple power supplies cannot share a common ground. Taking the Insulated Gate Bipolar Transistor (IGBT) module as an example, the IGBT module is a module that integrates and packages multiple IGBT single tubes together. In the field of motor control, an IGBT module integrating six IGBT single tubes is often used as an inverter unit to convert energy. Such an IGBT module needs to use four gate drive power supplies, and these four power supplies cannot be shared. ground, otherwise it will burn the drive circuit and damage the IGBT module. The quality of the gate drive power will affect the performance of the IGBT module. Too high or too low a drive power voltage may damage the IGBT module. When the gate drive power supply is overvoltage and the drive optocoupler receiv...

Claims

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Application Information

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IPC IPC(8): G01R31/40
CPCG01R31/40
Inventor 黄辉胡余生樊柳芝谭章德刘亚祥罗达智贾卫东王子荣
Owner ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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