A stator permanent magnet type dual rotor motor structure for hybrid electric vehicles

Abstract

The invention discloses a stator permanent magnet type dual-rotor motor structure for a hybrid electric vehicle. An outer stator core unit is composed of six groove iron core units which are evenly distributed in the circumferential direction and of the same structure, and six isosceles triangle iron core units of the same structure. An outer stator groove with an opening facing towards the axis is formed in the middle of each groove iron core unit. A V-shaped gap with the bottom face facing towards the axis is formed between every two adjacent groove iron core units. A V-shaped outer stator permanent magnet is fixedly embedded in each V-shaped gap. A V-shaped groove with an opening facing towards the axis is formed right in the middle of each V-shaped outer stator permanent magnet. The isosceles triangle iron core units are fixedly and fully embedded in the V-shaped grooves. The six V-shaped outer stator permanent magnets are composed of twelve single permanent magnet bodies which alternately conduct magnetizing in the tangent direction. No permanent magnets exist on an inner rotor and an outer rotor. Work reliability is improved, the requirements of the hybrid electric vehicle for different working conditions are met through control conducted by an inner motor and an outer motor, and efficiency and power density are high.

Description

technical field [0001] The invention relates to a stator permanent magnet double-rotor motor applied to a hybrid electric vehicle, belonging to the field of motor design. Background technique [0002] The driving part of a hybrid electric vehicle is a motor, and the performance of the motor plays a vital role in the performance of a hybrid electric vehicle. The motors used in hybrid electric vehicles include: switched reluctance dual rotor motors, stator permanent magnet dual rotor motors, and permanent magnet flux switching motors. The switched reluctance dual rotor motor has windings on the outer stator and the inner rotor, and the outer rotor has a double salient pole structure and has no windings and no permanent magnets. It has a simple structure and has the characteristics of a wide constant power range, but its efficiency is lower than that of permanent magnet motors. However, hybrid electric vehicle applications require high power density and small size and light we...

AI Technical Summary

Problems solved by technology

The switched reluctance dual rotor motor has windings on the outer stator and the inner rotor, and the outer rotor has a double salient pole structure and has no windings and no permanent magnets. It has a simple structure and has the characteristics of a wide constant power range, but its efficiency is lower than that of permanent magnet motors. However, the application of hybrid electric vehicles requires high power density and small and lightweight

Stator permanent magnet double-rotor motor can refer to the stator permanent magnet double-rotor motor proposed by the patent document CN101106308. The permanent magnets and windings are located on the outer stator and inner rotor. There are no permanent magnets and no windings on the double salient pole outer rotor. The structure is simple, which avoids the heat dissipation caused by the permanent magnet on the outer rotor and the problem of fixing the permanent magnet. The magnetic field coupling of the inner and outer motors is much smaller than that of the dual-rotor motor with permanent magnets on the outer rotor. The efficiency and power density are higher than that of the switched reluctance dual-rotor Motor, but because there are permanent magnets on the inner rotor, the heat dissipation and fixation of the inner rotor are still a problem, and the reliability of its work cannot be guaranteed when it is applied to a hybrid vehicle system

The permanent magnet flux switching motor adopts tangentially alternately magnetized permanent magnets on the stator to make it have a magnetic concentration effect, and the air gap magnetic field can be designed to be large (up to 2.5T), with high torque density and high power density On the other hand, because the permanent magnet flux linkage and the winding flux linkage on the permanent magnet flux switching motor are in parallel in space, they have certain resistance to demagnetization and good temperature resistance, so they are suitable for hybrid electric motors. Large output, small size, light weight and good reliability are required in automobiles, but permanent magnets in permanent magnet flux switching motors use a large amount and the utilization rate is not high

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