Permanent-magnet synchronous motor and vehicle

Abstract

The invention discloses a permanent-magnet synchronous motor, and the motor comprises a stator and a rotor. The stator comprises a support and an iron chip disposed on the support. The rotor is an external rotor, and comprises an outer ring, pole shoes, and permanent magnets. The motor is characterized in that the pole shoes are fixed on an internal surface of the outer ring in the peripheral direction; longitudinally-extending holes are disposed among the adjacent pole shoes; and the permanent magnets are fixed in the holes. The reasonable arrangement of the permanent magnets on the rotor improves the characteristics of the motor, reduces the cost of the motor, and reduces the size of the motor. The invention also discloses a vehicle comprising the above motor.

Description

technical field [0001] The invention relates to a permanent magnet synchronous motor. The invention also relates to a vehicle with such a permanent magnet synchronous machine. Background technique [0002] Electric vehicles are entering thousands of households in various forms. Electric vehicles as large as electric tricycles, electric motorcycles, electric bicycles, etc., have attracted more and more attention because of their zero-emission and pollution-free green travel using electric energy. In urban traffic, electric motorcycles and electric bicycles have gradually become the preferred means of transportation for medium and short-distance traffic because of their speed and convenience so that riders will not be troubled by traffic jams. [0003] Permanent magnet synchronous motors are widely used in more and more industries due to their high efficiency, high output torque, high power density and good dynamic performance. In the field of electric vehicles, the applica...

AI Technical Summary

Problems solved by technology

[0005] However, from the perspective of electric vehicles, users always hope to obtain further improved motor performance to meet their riding or passenger needs, and for the motor with the above structure, the improvement of its performance requires the use of more Permanent magnets, which add cost and volume

Also, as a surface type permanent magnet synchronous motor, the motor cannot apply additional reluctance torque that increases the output torque

In addition, since the permanent magnet needs to be fixed on the inner surface of the rotor with adhesives and other substances, this makes its mechanical strength weak, especially during high-speed operation, leaving certain potential safety hazards

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