Method for weakening induction pulsating voltage of brushless electro-magnetic field modulation motor

Abstract

The invention relates to the field of motor design, in particular to a method for weakening induction pulsating voltage of a brushless electro-magnetic field modulation motor, and discloses a method for weakening induction pulsating voltage of an excitation winding of the brushless electro-magnetic field modulation motor adopting double three-phase armature windings. The optimal weakening phase difference between the two sets of armature windings is analyzed and deduced based on the principle of excitation winding induction pulsating voltage weakening maximization, and the winding phase splitting principle of the double three-phase armature windings and the application conditions of the winding phase splitting principle are given through the phase relation between the armature coils. The excitation winding induction pulsating voltage weakening method is clear in thought and easy to operate, the brushless electro-magnetic field modulation motor adopting the double three-phase armature windings has the advantages of being low in excitation winding induction pulsating voltage amplitude, large in torque density and low in motor voltage grade and insulation grade requirements, and excellent motor performance is embodied.

Description

technical field [0001] The invention relates to the field of motor design, in particular to a method for weakening induced pulsating voltage of a brushless electric excitation magnetic field modulation motor. Background technique [0002] Over the past two decades, permanent magnet motors using rare earth permanent magnets have received extensive attention due to their advantages of high torque density and high efficiency. However, permanent magnet motors also have some disadvantages, such as limited operating temperature, relatively poor field weakening capability, high price and huge fluctuation of permanent magnets, etc. The electric excitation motor uses the field winding to generate the no-load air gap magnetic field, which replaces the permanent magnet inside the permanent magnet motor, thereby overcoming a series of inherent defects of the permanent magnet motor. [0003] Electric excitation motors can be divided into two types, one is the traditional rotor wound ele...

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Problems solved by technology

[0004] However, the brushless electric excitation field modulation motor also has the problem of field winding induced pulsating voltage, which will not only cause field current pulsation, reduce the control performance of the motor, and even endanger the stability of the field power supply

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