High-efficiency motor with full-circumference magnetic flux polarized circumferential winding and new-energy electric vehicle

Abstract

A motor with a full-circumference magnetic flux polarized three phase circumferential windings comprises three phase circumferential windings and six U-shaped stator magnetic poles which perform full-circumference magnetic flux polarization on the circumferential winding and have different orientations. A rotor shaft (200) is connected with rotor magnetic poles (202,203), (206,207), (212,213), (216,217), (222,223), (226,227) with a first orientation to a sixth orientation through rotor discs (201,211,221,231). The number of stator magnetic poles in a random orientation is same with that of the rotor magnetic poles in the orientation. Each phase circumferential winding controls two stator magnetic fields which performs polarization on the full circumference and in two orientations. The three phase circumferential windings (204,214,224) respectively control three phase stator and rotor magnetic fields which are at 120 DEG electric angle to one another. An electronic control system controls current of the three phase circumferential windings through testing the position of a rotor and is used as a motor or a power generator. The motor has advantages of small amount of magnetic flux leakage and high efficiency.

Description

technical field [0001] The invention belongs to the technical field of motors, and in particular relates to a high-efficiency motor and a new energy electric vehicle with full-circumference magnetic flux pole-splitting circumferential windings. Background technique [0002] The motor is a very important electromechanical conversion device, and its energy conversion efficiency is a particularly important technical indicator. The essence of improving efficiency is to reduce the loss of the motor as much as possible. [0003] The motors of traditional technology mostly use chain winding or concentric winding, and the flux leakage and heat generated by the end of the winding are more, resulting in more eddy current loss and resistive copper loss. How to effectively reduce the loss caused by the end of the motor , has become an important technical issue restricting the efficiency of the motor. [0004] On the other hand, when the circumferential winding is used, for the stator ...

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Problems solved by technology

[0003] The motors of traditional technology mostly use chain winding or concentric winding, and the flux leakage and heat generated by the end of the winding are more, resulting in more eddy current loss and resistive copper loss. How to effectively reduce the loss caused by the end of the motor , has become an important technical issue restricting the efficiency of the motor

[0004] On the other hand, when the circumferential winding is used, for the stator core with single-direction single-circumference distributed magnetic poles, there are vacant positions between adjacent magnetic poles on the circumference, that is, the spacing between adjacent magnetic poles, The magnetic pole pitch is referred to as the magnetic pole pitch. Part of the magnetic field of the stator winding at the magnetic pole pitch is transmitted to the stator poles on both sides of the magnetic pole pitch in the form of a bending of the magnetic force line. Part of the magnetic field at the magnetic pole pitch leaks and diverges to the space around the magnetic pole pitch, which makes the magnetic field generated by the stator winding The utilization rate is reduced, and a large electromagnetic interference will be formed

[0005] Another important aspect is that at present, the motors used in new energy electric vehicles include: AC motors, permanent magnet motors, switched reluctance motors, etc. Generally, these motors still use the traditional motor structure with end windings. The above-mentioned shortcomings make the development of electric vehicles subject to the constraints of motor technology to a large extent; under the technical conditions of the existing vehicle-mounted power batteries, how to improve the efficiency and The power problem has become a key technical bottleneck restricting the development of electric vehicles. Therefore, it is urgent to develop new motors with high efficiency, energy saving and high reliability.

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