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Electric drive system power tube open-circuit fault tolerance control method

An electric drive system, open-circuit fault technology, applied in motor control, motor generator control, AC motor control, etc., can solve problems such as insufficient overall capacity to power ratio, large number of power switch tubes, and many independent power supplies.

Active Publication Date: 2020-10-02
南京众科汇电气科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing fault-tolerant electric drive system still faces problems such as a large number of independent power supplies, a large number of power switch tubes, and an insufficient overall capacity-to-power ratio. There is still a lot of room for improvement in the ability

Method used

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  • Electric drive system power tube open-circuit fault tolerance control method
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  • Electric drive system power tube open-circuit fault tolerance control method

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Embodiment Construction

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative efforts belong to the protection scope of the present invention.

[0037] Such as figure 1 As shown, the electric drive system power tube open-circuit fault fault-tolerant control method, the electric drive system includes a double-winding permanent magnet motor, two sets of independent three-phase bridge inverters, two bidirectional thyristors TR1 and TR2, two capacitors C1 and C2, a DC power supply Udc, a cycle calculator, a gray predictive open-circuit fault diagnostic device, a power tube open-circuit fault locator and a power tube open-circuit fault processor, in ...

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Abstract

The invention discloses an electric drive system power tube open-circuit fault tolerance control method. According to the method, whether a fault occurs is judged through a mathematical model of greyprediction, then current values at a time of 3T / 4 and a time of T / 2 from the beginning of the fault are detected to judge the position of the fault, and finally fault-tolerant operation of an electricdrive system is achieved by adopting a corresponding control strategy according to the position of the fault. According to the invention, the method has the advantages of being high in reliability, high in diagnosis speed, not prone to misjudgment and free of extra sensors, can achieve fault tolerance control of the system in eight different power tube open-circuit fault states by controlling aninverter and a bidirectional thyristor, and has high fault-tolerant capacity.

Description

technical field [0001] The invention relates to the field of control methods of an electric drive system, in particular to a fault-tolerant control method for an open circuit fault of a power tube of the electric drive system. Background technique [0002] With the development of multi-electric, all-electric aircraft and hybrid and pure electric vehicles, the motor drive system has ushered in new development opportunities and challenges. In addition to requiring high power density and high efficiency, it also needs to have high output performance and high reliability. performance, which has become the key to the motor drive system. However, when the electric drive system fails, the motor will run asymmetrically, and the output torque will pulsate, resulting in large mechanical noise, which will lead to the decline of the overall performance of the system, especially the greatly reduced output power, or even malfunction, seriously endangering the The safety of the system, in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/22H02P27/12H02P29/024H02P29/028H02P25/18
CPCH02P25/18H02P27/12H02P29/027H02P29/028H02P21/22
Inventor 李洁蒋雪峰李运之
Owner 南京众科汇电气科技有限公司
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