Fault diagnosis method with fault-tolerant control of switch reluctance motor position sensors

A technology for switching reluctance motors and sensor faults, which is applied in the direction of electronic commutator, motor generator testing, etc. It can solve the problems of adding angle detection links, being unable to distinguish which phase is faulty, and being unable to diagnose, etc., to achieve good speed and performance. Fault-tolerant effect, high reliability and scope of application, fast and accurate diagnosis

Active Publication Date: 2013-12-11
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

However, if you only judge the sequence of edge appearance, one of the cases will not be able to distinguish which phase is faulty, so it is necessary to add an angle detection link, that is, to detect the angle between the new edge and the previous edge for comprehensive diagnosis
Since the operating condition of the motor cannot be determined, and the switched reluctance motor often works in a harsh environment, the angle calculation is inacc

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  • Fault diagnosis method with fault-tolerant control of switch reluctance motor position sensors
  • Fault diagnosis method with fault-tolerant control of switch reluctance motor position sensors
  • Fault diagnosis method with fault-tolerant control of switch reluctance motor position sensors

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[0039] The technical solution of the present invention will be described in detail below in conjunction with the drawings:

[0040] The present invention provides a fault diagnosis method with fault-tolerant control for a switch reluctance motor position sensor, which includes the following steps:

[0041] (1) The motor has multiple position sensors, and different motor position sensors have different numbers. For a certain path of position sensor signal, DSP is used to detect the time t when four consecutive edges appear in real time 1 , T 2 , T 3 , T 4 , Calculate the time Δt between two adjacent edges 1 =t 2 -t 1 , Δt 2 =t 3 -t 2 , Δt 3 =t 4 -t 3 , The interval time is short enough, the angular acceleration α of the motor between four consecutive edges is regarded as constant, and the time Δt required for consecutively passing through three identical angles 1 , Δt 2 And Δt 3 There is a certain relationship, and the relationship formula is calculated as follows:

[0042] Δt 3 ...

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Abstract

The invention discloses a fault diagnosis method with fault-tolerant control of switch reluctance motor position sensors. The fault diagnosis method includes diagnosis and fault-tolerant control on faults of several position sensors and diagnosis and control over fault recovery of the several position sensors. The fault diagnosis method can timely diagnose faults of a position sensor of each phase, switch control algorithms and enable operation states of a switch reluctance motor to be free from influences of the faults of the position sensors, and namely normal operation can continue to remain when the faults of the position sensors happen; when the position sensors recover, whether signals are normal is judged first, if the signals are normal, diagnosis faults recover, original algorithms are switched back, therefore, fault-tolerant capacity of the switch reluctance motor is effectively improved, and great significances are achieved.

Description

technical field [0001] The invention relates to a fault diagnosis method with fault-tolerant control of a position sensor of a switched reluctance motor, belonging to the technical field of fault diagnosis and fault-tolerant control of a switched reluctance motor system. Background technique [0002] Switched reluctance motor (referred to as SR motor) is a new type of speed-adjustable motor developed by combining power electronics technology, control technology and computer technology with traditional reluctance motor. With its superior characteristics such as flexibility, high operating efficiency, and strong fault tolerance, it has been applied in various fields such as traction transportation, general industry, aviation industry, and household appliances. [0003] The normal operation of the SR motor system requires the rotor position signal. Only through the feedback signal of the position sensor can the control system determine the actual position of the rotor, and then...

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Application Information

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IPC IPC(8): G01R31/34H02P6/16
Inventor 胡荣光邓智泉蔡骏王骋
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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