A split-slot field-modulated permanent magnet motor for hybrid electric vehicles

Abstract

The invention discloses a split-slot magnetic field modulation permanent magnet motor suitable for a hybrid electric vehicle. A plurality of permanent magnets having a rectangular radial section are embedded in the inner part of an intermediate rotor in the circumferential direction, every two permanent magnets form a permanent magnet module, two permanent magnets in one permanent magnet module are arranged in a V-shape and the two permanent magnets are not in contact, one V-shape opening direction of two permanent magnets in two adjacent permanent magnet modules is radially inward and the other V-shape opening direction is radially outward when the two permanent magnets are arranged in a V-shape; at the middle of each tooth end of an inner stator, an inner stator imaginary slot is arranged to form two inner stator core salient poles, and at the tooth end of the outer stator of each outer stator, an outer stator imaginary slot is arranged to form two outer stator core salient poles. Based on the principle of magnetic field modulation, the unnecessary harmonics in the air gap magnetic field are reduced and the torque output capability of the motor is enhanced by the cooperation of the split-slot structure of internal and external stators and the V-shaped permanent magnet topology structure of the intermediate rotor.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet motor manufacturing, in particular to a double-stator permanent magnet motor based on the magnetic field modulation principle. Background technique [0002] In order to alleviate the increasingly serious energy shortage and environmental pollution problems, it is urgent to develop new energy fields such as electric vehicles, wind power generation, and wave power generation. In these new energy fields, the motor is often used as the core component of energy conversion, and its performance is directly related to the system. Energy conversion efficiency and reliability. At present, many new energy occasions require motors to output high torque under low-speed operating conditions, such as hub motors used in electric vehicles, generators used in wind power generation, etc. In such traditional industrial occasions that require low speed and high torque, At present, most of the motors with ord...

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Problems solved by technology

However, this kind of magnetic gear composite motor has a three-layer air gap structure and two rotating parts, and the mechanical structure is relatively complicated, which increases the difficulty of motor processing and manufacturing.

In the literature with the Chinese patent application number 201210539414.2, a magnetism-concentrating stator permanent magnet vernier motor is proposed. In this vernier motor, by introducing modulation teeth into the stator structure, the number of poles and slots in the stator armature is small. Under the current situation, various harmonic components of the magnetic field generated by the magnetic field modulation effect are used to significantly increase the torque density of the motor. lower factor

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