Double-switch magnetoresistive motor system based on synchronous drive

Abstract

The invention discloses a double-switch magnetoresistive motor system based on synchronous drive. The system comprises a power convertor, a direct-current power supply, a position detector, a controller, a main switch magnetoresistive motor and a sub switch magnetoresistive motor, wherein the position detector is used for detecting and acquiring position state information of a rotor of the main switch magnetoresistive motor; the controller is used for constructing and generating a group of driving signals according to the position state information so as to control the power convertor; and the power convertor is used for controlling the connection and the disconnection of each stator winding of the two switch magnetoresistive motors according to the driving signals. The synchronous drive of the two motors can be realized through only one set of power convertor, the main and sub motors synchronously run naturally, and net balance is not caused between the two motors. The power convertor is of the simplest structure, and only one switch tube and only one freewheel diode are required for each phase. When the main motor is in a power generation state and the sub motor is in an electric state, the sub motor can be directly driven without additional intermediate energy decoupling device and power convertor.

Description

technical field [0001] The invention belongs to the technical field of motors, and in particular relates to a synchronously driven double-switch reluctance motor system. Background technique [0002] The motor is a device that converts electrical energy into mechanical energy. According to the different power sources of the motor, it can be divided into DC motors and AC motors. The switched reluctance motor (SRM) is a new type of motor that uses DC power supply. The switched reluctance motor is a double-salient variable reluctance motor. The salient poles of the stator and rotor are laminated by ordinary silicon steel sheets. There is neither winding nor permanent magnet on the rotor, and windings are wound on the salient poles of the stator. SRM can be designed into a variety of structures with different phase numbers, and the number of poles of the stator and rotor has many different combinations. figure 1 A schematic diagram of the four-phase 8 / 6 structure SRM and its po...

AI Technical Summary

Problems solved by technology

This system structure cannot achieve zero-error synchronization, because the speed detected by the master motor has a delay in the control time of the slave motor controller, so the traditional two-machine parallel system has a natural synchronization error

At the same time, the traditional two-machine parallel system requires its own power supply and power converter, which greatly increases the cost and failure points of the system

[0006] In the context of wind power or other systems with power generation and motoring, it is necessary to image 3 As shown in the structure, the traditional motor power generation needs to be rectified and then powered to the motor through the power converter. In this application background, more power electronic devices and energy storage devices such as bus capacitors are required, and the system is complicated due to the large number of switching devices. , the existence of the bus capacitor not only increases the cost and volume of the system, but also affects the life of the entire system

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