Permanent magnet-magnetic resistance radial magnetic-flux compound double-rotor motor

Abstract

The invention discloses a permanent magnet-magnetic resistance radial magnetic-flux compound double-rotor motor. The motor comprises a stator (1), an external rotor (4) and an internal rotor (5) which are assembled from outside to inside. The internal rotor (5) possesses an internal-rotor salient pole (8). A three-phase centralized internal rotor winding (6) is embedded into an internal rotor groove. The external rotor (4) is provided with a permanent magnet (3). A radial internal surface of the external rotor (4) possesses an external-rotor salient pole (7). A radial external surface of the external rotor (4) is a cylindrical surface. An interior surface of the stator (1) is the cylindrical surface and a three-phase distributed stator winding (2) is embedded into a stator groove. In the invention, tooth space vibration and noises are effectively reduced, a power density and a power factor are improved and an output torque is increased.

Description

technical field [0001] The invention belongs to the field of hybrid electric vehicles, and in particular relates to a permanent magnet-reluctance radial flux composite double-rotor motor used for a hybrid electric vehicle. Background technique [0002] The motor used in hybrid electric vehicles is a doubly salient pole dual rotor motor, which includes two inner and outer rotors and a stator. Chinese patent document CN 103595159 A disclosed a double-salient-pole double-squirrel-cage outer rotor structure of a double-rotor motor on February 19, 2014. The feature of the outer rotor is that both the inner ring and the outer ring have salient poles, which is called a double-salient pole. Salient pole outer rotor, the outer rotor body is made of laminated silicon steel laminations, and two inner and outer squirrel cages are embedded on the outer rotor body, which can reduce rotor loss and enhance the rigidity of the cylindrical lamination outer rotor structure and strength. [0...

AI Technical Summary

Problems solved by technology

[0003] However, the outer rotor of the existing dual-rotor motor adopts a double salient pole structure, and the lengths of the inner and outer air gaps of the outer rotor are different. Since the air is a non-magnetic material, the reluctance is very large, so the inner and outer air gaps of the outer rotor are different. The air gap reluctance values ​​are not equal on the outside along the circumference

In the case of power on, if the magnetomotive force is the same, the magnetic flux generated along the circumferential direction is different, resulting in different forces on the inner rotor and stator slots, which are prone to vibration and noise

The dual-rotor motor with double salient poles of the outer rotor has the following disadvantages: the power density is small, the power factor is small; and there are large cogging torque ripples and large vibration noise

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