Electrically Excited Double Salient Pole Motor Using Dynamic Switching to Realize Fault-Tolerant Control of Excitation Converter

Abstract

The invention discloses an electrically-excited double-salient pole motor capable of dynamically switching to realize fault-tolerant control of an excitation converter, and relates to the field of an electrically-excited double-salient pole motor. The two switching tubes that are turned on at one time are switched to the other two switching tubes for fault-tolerant power generation operation, and in the process that the excitation current decreases from the absolute value of the target current in the current direction to 0 and increases to the absolute value of the target current in the opposite direction In, control the on-off of the IGBT switch in the main power drive circuit to adjust the working state of each phase in the three-phase armature winding to control the output voltage to be stable at the target voltage value, so as to ensure that the output power is basically unchanged during the excitation current switching process , which improves the reliability of electric excitation double salient pole motors in important occasions such as aerospace and automobile, and is suitable for electric excitation double salient pole motors with multi-quadrant operation.

Description

technical field [0001] The invention relates to the field of electric excitation doubly salient motors, in particular to an electric excitation doubly salient motor capable of 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 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 cycle of the corresponding power tube and adjusts the excitation current to achieve output to the motor. voltage control. [0003] The open-circuit fault of the excitation power circuit is a key factor restricting the stabl...

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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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