A permanent magnet motor with double-layer permanent magnet excitation

Abstract

The present invention discloses a permanent magnet motor with double-layer permanent magnet excitation. The motor comprises a first stator, a second stator and a rotor which is at the inner side of the first stator. The second stator is at the inner side of the rotor. The rotor is fixed to a rotation shaft. The inner side of the first stator is provided with evenly distributed slots which are provided with first permanent magnets and armature windings. Second permanent magnets are evenly embedded in the rotor. The outer side of the second stator is provided with evenly distributed slots which are provided with third permanent magnets. The invention provides the double-stator permanent magnet motor with double-layer permanent magnet excitation, a second stator yoke region is used for generating an upward additional magnetoresistive change along a gap circumferential direction, compared with a traditional permanent magnet motor, the rotor yoke region is fully utilized, and an enough yoke region is left to avoid the saturation of a rotor iron core. The double-stator permanent magnet motor with double-layer permanent magnet excitation provided by the invention has a large output torque.

Description

Technical field [0001] The invention relates to the technical field of motors and transmissions, in particular to a double-stator permanent magnet motor with double-layer permanent magnet excitation. Background technique [0002] Compared with traditional electric excitation motors, permanent magnet motors have a simple structure, reliable operation; small size, light weight; less loss, high efficiency; the shape and size of the motor can be flexible and diverse and other significant advantages, so it has received extensive attention from the electric vehicle industry . [0003] In recent years, a stator permanent magnet type motor, that is, a flux switching type permanent magnet motor has received widespread attention. Compared with traditional permanent magnet motors, the motor has permanent magnets and armature windings on the stator, and there are no permanent magnets and windings on the rotor, and only consists of a conductive core. The torque density of this motor is much l...

AI Technical Summary

Problems solved by technology

However, this motor omits the rotor magnetic yoke. Although the volume, weight and moment of inertia of the rotor are reduced, and the rotor iron loss is reduced, the electromagnetic load of the inner and outer stator cores of the motor is limited, and the motor torque density is relatively low. Low

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