Fault-tolerant control method for short-circuit fault of switched reluctance motor

A switched reluctance motor, fault-tolerant control technology, applied in motor control, AC motor control, control system and other directions, can solve the problem of unable to suppress the torque gap, destroying the balance state of the drive system, and damage to the switched reluctance motor system. The effect of convenient wiring, high winding utilization, and improved reliability

Active Publication Date: 2022-04-29
ANHUI UNIVERSITY +1
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  • Abstract
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Problems solved by technology

The failure of the power converter will destroy the balance state of the drive system, resulting in an irrepressible torque gap or even braking torque. Long-term fault operation will lead to damage to the entire switched reluctance motor system

Method used

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  • Fault-tolerant control method for short-circuit fault of switched reluctance motor
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  • Fault-tolerant control method for short-circuit fault of switched reluctance motor

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Embodiment Construction

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art based on the present invention belong to the protection scope of the present invention.

[0020] The embodiment of the present invention provides a fault-tolerant control method for short-circuit faults of switched reluctance motors. The method is realized by a three-phase four-leg switched reluctance motor fault-tolerant control system. The three-phase four-leg switched reluctance motor fault-tolerant control system includes a three-phase phase switched reluctance motor, a DC power supply, two circuit breakers, and a four-leg inverter.

[0021] Amo...

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Abstract

The invention discloses a fault-tolerant control method for a short-circuit fault of a switched reluctance motor, and relates to the technical field of motor driving and control. The method is realized through a three-phase four-bridge-arm switched reluctance motor fault-tolerant control system, and the system comprises a three-phase switched reluctance motor, a direct-current power supply, two circuit breakers and a four-bridge-arm inverter. Wherein a winding of the three-phase switched reluctance motor comprises an A phase, a B phase and a C phase, the winding adopts a star-shaped connection mode, and a neutral point of the winding is connected with a fourth bridge arm of the four-bridge arm inverter; when the fault-tolerant control system of the three-phase four-bridge-arm switched reluctance motor normally works, a two-phase excitation mode is adopted and can be divided into six power-on modes: A + C-, A + B-, B-C +, C + A-, A-B + and B + C-, a fault part is cut off when a short-circuit fault occurs in a switching tube, and the fault-tolerant control is completed by changing into a common switching mode. Fault-tolerant control can be carried out when the power converter of the switched reluctance motor has a short-circuit fault, and it is guaranteed that the system performance of the switched reluctance motor is basically unchanged compared with normal operation.

Description

technical field [0001] The invention relates to the technical field of motor drive and control, in particular to a fault-tolerant control method for a short-circuit fault of a switched reluctance motor. Background technique [0002] The switched reluctance motor has a solid and simple structure and low cost. The three-phase switched reluctance motor system with bipolar control has simple wiring, wide speed range, and small torque ripple. It is suitable for high-speed and harsh environments. However, due to the aging of components, overcurrent and overvoltage, etc., failures may occur during the operation of the motor. The power converter of the switched reluctance motor and its drive circuit, as the central actuator of the system control, are the links most prone to failure in the switched reluctance motor system. The failure of the power converter will destroy the balance state of the drive system, resulting in an irrepressible torque gap or even braking torque. Long-term ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P25/092H02P29/028H02M1/32
CPCH02P25/092H02P29/028H02M1/32
Inventor 丁石川罗金马楷杰杭俊黄友锐李伟张鹏
Owner ANHUI UNIVERSITY
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