Electro-magnetic doubly salient motor capable of realizing fault-tolerant control of excitation converter by dynamic switching

Abstract

The invention discloses an electro-magnetic doubly salient motor for realizing fault-tolerant control of an excitation converter through dynamic switching, and relates to the field of electro-magnetic doubly salient motors.When an open-circuit fault occurs in an excitation converter, the doubly salient electro-magnetic motor switches two switched-on switch tubes in normal power generation operation to the other two switched-on switch tubes for fault-tolerant power generation operation, and reduces the absolute value of the target current in the current direction of the excitation current to 0 and increases the absolute value of the target current in the opposite direction of the excitation current; on-off of an IGBT switch in the main power drive circuit is controlled to adjust the working state of each phase in the three-phase armature winding so as to control the output voltage to be stabilized at a target voltage value, it is guaranteed that the output power is basically unchanged in the excitation current switching process, and the power generation reliability of the electro-magnetic doubly salient motor in important occasions such as aerospace and automobiles is improved, and the motor is suitable for an electro-magnetic doubly salient motor in multi-quadrant operation.

Description

technical field [0001] The invention relates to the field of electric excitation double salient pole motors, in particular to an electric excitation double salient pole motor for dynamic switching to realize fault-tolerant control of an excitation converter. Background technique [0002] Electric excitation double salient pole motor is a new type of motor composed of position sensor, main power converter, excitation power circuit, controller and motor body with salient pole stator and rotor structure. The main function of the excitation power circuit of the electric excitation doubly salient pole motor is to convert the DC excitation power into the DC input current of the motor excitation winding through the excitation converter. The controller controls the duty ratio of the corresponding power tube and adjusts the excitation current to realize the output to the motor. voltage control. [0003] The open-circuit fault of the excitation power circuit is a key factor restricti...

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Problems solved by technology

[0004] As can be seen from the above list, the current fault-tolerant control of the excitation power circuit mainly focuses on the failure of the excitation winding. The main method is to cut off the DC excitation power supply for fault-tolerant control when the excitation winding is faulty. In the field power circuit of a salient pole motor, the field converter and the field winding are weak links, but there is currently no fault-tolerant power generation control for the failure of the field converter

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