Fault-tolerant double-rotor bipolar permanent magnet synchronous motor and method

Abstract

The present invention discloses a fault-tolerant birotor bipolar permanent magnet synchronous motor and an application method thereof. The problem is solved that the output torque of a motor is limited in the prior art, an air gap superficial area is increased, and the torque density of the motor is further improved. The fault-tolerant birotor bipolar permanent magnet synchronous motor comprises astator and a rotor, stator slots configured to set a stator winding are uniformly distributed at the inner side and the outer side of the stator in a peripheral direction, conductors of an outer circumferential groove and an inner circumferential groove of the stator in a radial direction belong to the same phase coil, the rotor comprises an inner rotor arranged at the inner side of the stator and an outer rotor arranged at the outer side of the stator, the number of permanent magnet poles of the inner rotor is three times the number of permanent magnet poles of the outer rotor, and the permanent magnets of the inner and outer rotors are subjected to magnetizing in a radial direction to form a bipolar permanent magnet synchronous motor.

Description

technical field [0001] The invention relates to the field of motors, in particular to a fault-tolerant double-rotor bipolar permanent-magnet synchronous motor and a method thereof. Background technique [0002] Multi-phase motors and their systems have become research hotspots in recent years due to their unique advantages. Compared with traditional three-phase motor systems, multi-phase motors and their speed control systems have the following outstanding advantages: First, they can be realized with low-voltage power devices. High-power drive, thereby reducing the cost of the inverter and improving system reliability; secondly, as the number of phases increases, the torque ripple frequency increases and the amplitude decreases, thereby reducing the vibration and noise of the motor; the phase redundancy feature ensures that the multi-phase motor has High fault tolerance, improve the safety and reliability of motor operation; finally, under the same current effective value, t...

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Problems solved by technology

[0003] In recent years, permanent magnet motors and their systems have been widely used in many industries due to their high efficiency, high power density and high torque density. However, due to structural limitations, the final speed output of existing multi-phase motors is limited.

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