Method for independently controlling all phases of transverse magnetic flux motor

Abstract

The invention relates to a method for independently controlling all phases of a transverse magnetic flux motor, wherein the transverse magnetic flux motor which is driven by an H-bridge driving system is completely decoupled, all the phases are controlled independently within a full speed range of the transverse magnetic flux motor, and the balance of torque and currents among all the phases is realized. The method for independently controlling all the phases of the transverse magnetic flux motor has the advantages that the method is a high-performance speed control method for the transverse magnetic flux motor, all the phases of the transverse magnetic flux motor are controlled independently and completely decoupled so that the currents of all the phases of the motor are the same and the electromagnetic torque of all the phases of the motor is balanced, and torque pulsation and vibration of the motor are reduced. The method for independently controlling all the phases of the transverse magnetic flux motor solves the problem that the torque and currents among all the phases in the full speed range are not balanced, and remarkably reduces the torque pulsation and vibration noise caused by the unbalance.

Description

technical field [0001] The invention relates to an independent control method for each phase of a transverse flux motor. Background technique [0002] Usually, the transverse flux motor is driven by a general-purpose frequency converter, and the control method adopted is: three-phase sine wave control, or three-phase square wave control. [0003] The existing three-phase sine wave control method adopts a three-phase transverse flux permanent magnet motor with an electrical angle difference of 120°. This kind of motor can make good use of the existing general-purpose inverter device, and can effectively improve the power factor. [0004] In the existing three-phase square wave control method, the stators or rotors of each phase of the motor should be different from each other by a phase angle in terms of spatial structure. In order to reduce the cost of the drive system, a three-phase square-wave inverter (120° working mode) with mature technology and low cost is used for p...

AI Technical Summary

Problems solved by technology

[0005] However, due to the complete electromagnetic isolation between the phases of the transverse flux motor, that is, there is no electromagnetic coupling between the phases, there are inherent characteristics of unequal back electromotive force between phases and unbalanced phase difference after the motor is manufactured.

The above two control methods are based on the assumption that the three-phase windings of the stator and rotor of the three-phase motor are symmetrical, and the electrical angle is 120° in space. Controlling the motor will inevitably lead to unbalanced current and electromagnetic torque between phases. , and produce large torque ripple and vibration

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