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Fault diagnosing and positioning method for four position sensors of four-phase switch reluctance motor

A switch reluctance motor, sensor failure technology, applied in instruments, measuring devices, etc., can solve the problems of position sensor output signal edge pulse loss, switched reluctance motor commutation failure, inapplicability and other problems, to achieve a wide range of engineering application value, The diagnostic method is reliable and the effect of avoiding misdiagnosis

Active Publication Date: 2015-03-25
CHINA UNIV OF MINING & TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to dust, collision and other reasons, the commonly used photoelectric, magnetoelectric, and electromagnetic position sensors will fail, resulting in the loss of edge pulses of the output signal of the position sensor after the failure.
The failure of the position sensor causes the commutation failure of the switched reluctance motor, which affects the reliable operation of the switched reluctance motor. Therefore, it is extremely important to diagnose and locate the fault of the position sensor
Using four position sensors to provide the basis for speed calculation and motor commutation is very beneficial to improve the fault tolerance and reliability of the four-phase switched reluctance motor system; the traditional fault diagnosis method based on interval time and fault diagnosis method based on edge capture Only applicable to the running state of the switched reluctance motor at a constant speed, not applicable to the running of the switched reluctance motor at varying speeds

Method used

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  • Fault diagnosing and positioning method for four position sensors of four-phase switch reluctance motor
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  • Fault diagnosing and positioning method for four position sensors of four-phase switch reluctance motor

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Embodiment Construction

[0039] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0040] figure 1 Shown is a schematic diagram of the installation of four position sensors P, Q, R and S of a four-phase 8 / 6 structure switched reluctance motor. The output signal of the position sensor is as figure 2 As shown, the output signal phase of the switched reluctance motor position sensor P is earlier than the output signal phase of the position sensor Q, the output signal phase of the position sensor Q is earlier than the output signal phase of the position sensor R, and the position sensor R The output signal phase is earlier than the output signal phase of the position sensor S in time, and the output signal phase of the position sensor S is earlier than the output signal phase of the position sensor P; set the rising edge of the output signal of the position sensor P to the rising edge of the output signal of the position sensor Q The edge ...

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Abstract

The invention discloses a fault diagnosing and positioning method for four position sensors of a four-phase switch reluctance motor. The method is suitable for fault diagnosing and positioning of the four position sensors of the rotating type or linear type switch reluctance motor in four phases or phases of which the number is the multiple of four and of various topological structures. Whether the position sensors break down or not is judged according to the sequence of two adjacent rising edge pulses of output signals of the four position sensors, a fault diagnosis buffering zone is set, incorrect diagnosis is avoided, the faults of the position sensors are positioned by distinguishing the position sensors output signals which the rising edge pulses come from, the fault diagnosing and positioning method can be used for fault diagnosing and positioning of the single position sensor, the two position sensors, the three position sensors and the four position sensors, diagnosing and positioning results are not affected by the speed changes of the constant speed, acceleration, deceleration and the like of the motor, and the diagnosing method is reliable, high in practicability and wide in engineering application value.

Description

technical field [0001] The invention relates to a fault diagnosis and positioning method for a position sensor of a four-phase switched reluctance motor, and is especially suitable for fault diagnosis of four position sensors of a four-phase switched reluctance motor, multiple topological structures, rotary or linear switched reluctance motors and positioning. Background technique [0002] In the rotary or linear four-phase switched reluctance motor system, the output signals of two position sensors are commonly used to provide the basis for speed calculation and motor commutation, which is extremely important for the reliable operation of the rotary or linear switched reluctance motor system. However, due to dust, collision and other reasons, the commonly used photoelectric, magnetoelectric, and electromagnetic position sensors will fail, resulting in the loss of edge pulses of the output signal of the position sensor after the failure. The failure of the position sensor w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/00
CPCG01D18/00G01B21/00
Inventor 陈昊韩国强程鹤王千龙王青王星
Owner CHINA UNIV OF MINING & TECH
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