Novel inner rotor permanent magnet motor

Abstract

The invention belongs to the technical field of motors, and in particular relates to a novel inner rotor permanent magnet motor with permanent magnet. The inner rotor permanent magnet motor comprises a stator assembly and a shaft type inner rotor inside the inner rotor, wherein the rotor assembly comprises a stator iron core and a stator coil which is wound on the stator iron core; the stator iron core is of a big and small slot structure which comprises big slots and small slots; the number of the small slots is equal to the number of the big slots; the small slots are correspondingly distributed on the top of the each tooth of the stator iron core; the ratio of the number of the big slots to the number of poles of the rotor is in a fractional slot design; the ratio of the number of the big slots to the number of poles of the rotor meets the following formula: the ratio is equal to (2p+/-1)/3: 2p, wherein p represents pole pairs of the motor; and the total number of the stator iron core is (2p+/-1)/3*2. On the basis of keeping higher processing property, slot insulation materials of the inner rotor permanent magnet motor are reduced, the winding coefficients are high, the harmonic content is small and the efficient running of the motor can be ensured. The inner rotor permanent magnet motor can be widely applied to an axial flow fan and other electrical equipment, thus ensuring preferable usability of the axial flow fan and the other electrical equipment.

Description

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AI Technical Summary

Benefits of technology

This new technology improves upon previous designs by reducing the impacts from inverse-sequence magnetism during power supply systems for electric motors. It achieves this through making certain specific parts of the machine smaller or eliminating those requiring extra materials like copper wire. Additionally, it allows for better control over how much space they occupy when compared to traditional methods. Overall, these improvements improve the overall function and effectiveness of electrical machines used at different levels within an industrial setting such as automobiles, manufacturing equipment, etc..

Problems solved by technology

This patented technical solution described by the inventers relates to improving performance at high speeds (up to 2000rpm) with conventional designs used for permanent magnetic inner rotating machines. However, these solutions have limitations due to their limited use within specific ranges or applications.

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