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Six-phase motor driving system fault diagnosis method based on vector space decoupling

A motor drive system, vector space technology, applied in the direction of measuring electricity, measuring electrical variables, neural learning methods, etc., can solve the problems of poor recognition accuracy, increased electromagnetic interference, unbalanced current of each phase, etc., to achieve strong practicability, The effect of improving reliability

Inactive Publication Date: 2021-08-27
HARBIN UNIV OF SCI & TECH
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Problems solved by technology

The inverter is the most prone to failure in the motor control system. Failure of the inverter will lead to unbalanced current of each phase, large torque ripple, increased electromagnetic interference, and long-term work may cause other problems. Hidden dangers seriously affect the stability of the motor control system
At present, the efficiency and accuracy of fault identification for the motor drive system and inverter are low and the recognition accuracy is poor, which seriously affects the control effect of the motor and the fault-tolerant operation stability of the motor.

Method used

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  • Six-phase motor driving system fault diagnosis method based on vector space decoupling
  • Six-phase motor driving system fault diagnosis method based on vector space decoupling
  • Six-phase motor driving system fault diagnosis method based on vector space decoupling

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Embodiment Construction

[0058]Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0059] It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic ideas of the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and number of component...

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Abstract

The invention discloses a six-phase motor driving system fault diagnosis method based on vector space decoupling, and belongs to the technical field of motor control. The method aims at solving the problems that a motor driving system is low in inverter fault recognition efficiency and poor in recognition accuracy, and the control effect of a motor and the fault-tolerant operation stability of the motor are seriously affected. According to the method, vector space decoupling is utilized, and decoupling current is obtained according to phase current of the motor; according to the phase current and the decoupling current, a fault index Fn when each phase of the motor is out of phase is acquired, when the fault index Fn is 0, it is indicated that the nth phase of the inverter is normal, and when the fault index Fn is 1, it is indicated that the inverter has an out-of-phase fault of the nth phase. According to the invention, the fault diagnosis efficiency of the inverter in the motor driving system is improved, and the reliability of fault diagnosis is enhanced.

Description

technical field [0001] The invention relates to the field of motor control, in particular to a fault diagnosis method for a six-phase motor drive system based on vector space decoupling. Background technique [0002] The six-phase permanent magnet synchronous motor has the advantages of low voltage, high power, high efficiency, fault tolerance, and low noise. It has been used in applications with high reliability requirements such as ship propulsion and aviation propulsion. The inverter is the most prone to failure in the motor control system. Failure of the inverter will lead to unbalanced current of each phase, large torque ripple, increased electromagnetic interference, and long-term work may cause other problems. Hidden dangers seriously affect the stability of the motor control system. At present, the efficiency and accuracy of fault identification for the motor drive system and inverter are low, which seriously affects the control effect of the motor and the fault-tol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G01R31/54G01R29/16G06K9/00G06K9/62G06N3/04G06N3/08
CPCG01R31/00G01R29/16G01R31/54G06N3/04G06N3/08G06F2218/12G06F18/241
Inventor 戈宝军候增全高晗璎
Owner HARBIN UNIV OF SCI & TECH
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