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Space power supply push-pull circuit and switch tube fault diagnosis and fault tolerance method

A technology of push-pull circuit and space power supply, which is applied in the direction of emergency protection circuit devices, electrical components, and adjustment of electric variables, etc. It can solve the problems of unsuitable multi-output isolated push-pull circuit space power supply, etc., and achieve rapid diagnosis and identification capabilities , less sensitivity, and improved reliability

Pending Publication Date: 2021-10-08
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current open circuit and short circuit fault diagnosis methods focus on single-switch non-isolated DC-DC converters, which are not suitable for space power supplies with multiple output isolated push-pull circuits.

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  • Space power supply push-pull circuit and switch tube fault diagnosis and fault tolerance method
  • Space power supply push-pull circuit and switch tube fault diagnosis and fault tolerance method
  • Space power supply push-pull circuit and switch tube fault diagnosis and fault tolerance method

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Embodiment Construction

[0033] In order to make the object, technical solution and advantages of the present invention clearer, 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, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0034] Such as figure 1 As shown, a space power supply push-pull circuit, its space power supply DC-DC converter topology adopts three-stage cascading, including Buck pre-stabilization circuit, push-pull isolation circuit including redundant switch tube (hardware reconstruction) , And the post-stage non-isolated precision voltage regulator circuit. The Buck pre-stabilizing circuit includes a switch tube Q1...

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Abstract

The invention relates to a space power supply push-pull circuit and switch tube fault diagnosis and fault tolerance method, and belongs to the field of space switch power supply fault diagnosis. According to the method, voltage and current sampling signals of two switching tubes in a push-pull circuit serve as fault characteristic quantities and are compared with a voltage and current fault threshold value, and short-circuit or open-circuit fault signals are generated through FPGA cycle counting. After a fault occurs, a series-parallel connection redundancy switch tube is used for changing an MOSFET combination driving mode on line, rapid on-line isolation and hardware reconstruction of a fault tube are achieved, it is guaranteed that a power source topology continues to work normally, and therefore the reliability of on-orbit operation of a space power source is greatly improved.

Description

technical field [0001] The invention belongs to the field of fault diagnosis of space switching power supplies, and in particular relates to a space power supply push-pull circuit and a switch tube fault diagnosis and fault tolerance method. Background technique [0002] As an important part of the aerospace power system, the space power converter plays a decisive role in the performance, reliability and life of the spacecraft. With the longer service life of space vehicles and the increasing complexity of modern aerospace electronic equipment, the probability of power system failures increases accordingly. According to literature statistics on on-orbit spacecraft failures published abroad from 1993 to the end of 2012, during the spacecraft’s in-orbit service, 30.3% of the more than 300 on-orbit failures were power system failures. In view of the non-repairability, high reliability and long life requirements of space power converters in complex operating environments, it is...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/337H02M1/32H02H7/12
CPCH02M3/3376H02M1/32H02H7/1213
Inventor 刘金鑫张晓斌任莹楠倪骏康
Owner NORTHWESTERN POLYTECHNICAL UNIV