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Fault tolerant control method for double salient pole permanent magnet motor

A permanent magnet motor and fault-tolerant control technology, which is applied in motor control, AC motor control, motor parameter estimation/correction, etc., can solve problems not related to intelligent fault-tolerant drive technology, etc. The effect of high reliability and simple control method

Inactive Publication Date: 2009-05-06
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing research results focus on the design, analysis and control of this kind of motor, all of which do not involve the intelligent fault-tolerant drive technology proposed by the present invention

Method used

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  • Fault tolerant control method for double salient pole permanent magnet motor
  • Fault tolerant control method for double salient pole permanent magnet motor
  • Fault tolerant control method for double salient pole permanent magnet motor

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Experimental program
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Effect test

Embodiment Construction

[0022] The fault-tolerant control method proposed by the present invention adopts three-phase square wave control when the doubly salient permanent magnet motor is in a normal operating state; Run with a fault. Its specific implementation steps are:

[0023] 1. Establish the torque equation of doubly salient permanent magnet motor under three-phase square wave control

[0024] The 12 / 8 pole doubly salient pole permanent magnet motor with straight slot rotor has a trapezoidal wave back EMF. From the traditional control method, square wave control should be adopted. Under normal operating conditions, the electromagnetic output torque of a three-phase doubly salient permanent magnet motor controlled by a 120° square wave can be expressed as:

[0025] T N _ BLDC = 6 E m I m...

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Abstract

The invention relates to a fault-tolerance controlling method used for a double-convex-pole permanent magnetic motor. A double-convex-pole permanent magnetic motor of a straight flute rotor has trapezoid wave back-emf, and a three-phase square wave is used for control in the normal running of a system. The advantages of simple method, high outputted power, and the like are obtained. When the system has a phase-defect fault, an equivalent sine wave driving controlling method is used for calculating the equivalent three-phase sine wave current of a torque generated in normal running, and then amplitude values and phase positions of two non-fault phase-fault-tolerance sine wave currents in a fault-tolerance state are calculated, thus, the output torque of a driving system of the double-convex-pole permanent magnetic motor in phase-defect running is equivalent to that of the normal running state, and the running with a fault of the double-convex-pole permanent magnetic motor is realized.

Description

technical field [0001] The invention is a fault-tolerant control method for a three-phase 12 / 8 pole double salient pole permanent magnet motor, which is suitable for application occasions of motor drive systems with high requirements for continuous operation, such as aerospace, steel rolling, and mines. Background technique [0002] Motor drive systems are more and more widely used in military, industrial and agricultural production, especially in some fields that have high requirements for system reliability, such as aerospace, military equipment, etc., which have a great impact on the reliability of the motor drive system. High requirements, the fault-tolerant control method in the fault state is its key technology. [0003] At present, research on fault-tolerant motors and their control methods at home and abroad mostly focuses on two types of motors: switched reluctance motors and traditional rotor permanent magnet motors. Although the former has a simple structure and ...

Claims

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Application Information

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IPC IPC(8): H02P25/02H02P23/14H02P29/028
Inventor 程明赵文祥花为
Owner SOUTHEAST UNIV
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