The present invention discloses a consequent pole brushless permanent magnet motor used for an electronic power-assisted steering system. The motor comprises a stator iron core having a hollow cylinder shape, a rotor iron core having a hollow cylinder shape, and a plurality of magnetic steels, wherein the inner wall of the stator iron core is equipped with grooves, and the stator windings are placed in the corresponding stator grooves; the rotor iron core sleeves a central through hole of a stator cylinder coaxially, the outer surface of the rotor iron core is equipped with a plurality of grooves, and the number of the grooves is a half of the number of the motor operation magnetic field poles; the plurality of magnetic steels are placed in the grooves of the rotor iron core in a one-to-one correspondence manner, and the polarities of the magnetic steels in the adjacent grooves are same, so that the rotor magnetic steels only exist the single polarity and form the salient pole structures, and accordingly, the permanent magnet amount can be reduced, while an output torque of the motor can be kept. The present invention also discloses the corresponding electronic power-assisted steering system. According to the present invention, the rotor structure of the permanent magnet motor is optimized and improved, thereby reducing the permanent magnet amount of the motor rotor, and being able to save the position sensors of the power-assisted steering system.
Consequent pole brushless permanent magnet motor and electronic power-assisted steering system based on motor
2015-12-09
Patent
Elektronische Ressource
Englisch
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