Method for improving motor torque density and radial and axial magnetic flux parallel-connected permanent magnet motor

Abstract

The invention provides a method for improving motor torque density. According to the method for improving the motor torque density based on a radial and axial magnetic flux parallel-connected permanent magnet motor, radial magnetic flux and axial magnetic flux are combined. In a motor rotor, the radial magnetic flux and the axial magnetic flux are provided with independent magnetic flux paths respectively, the space utilization rate of the rotor and the utilization rate of an iron core are effectively improved, and the limitation of iron core saturation to the motor torque density and the power density is reduced. The axial magnetic flux forms a closed loop through a rotor front portion, a rotor end face permanent magnet set, a rotor end face air gap and a stator. The radial magnetic flux forms a closed loop through a rotor, a rotor circumference face permanent magnet set, a rotor circumference face air gap and the stator. The invention further provides the radial and axial magnetic flux parallel-connected permanent magnet motor.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a method for increasing the torque density of a motor and a radial and axial flux parallel permanent magnet motor. Background technique [0002] Improving the torque density and power density of the motor and reducing the volume and weight of the motor are the eternal direction of motor development. For traditional radial motors, when the frame size of the motor is large, the space of the rotor is not fully utilized, especially at the forehead of the rotor, the magnetic density is almost zero, so the utilization rate of the rotor core is low and easy to saturate. It is difficult to increase the torque density of the motor. The traditional radial motor solution is to open holes in the forehead of the rotor, but in order to ensure the mechanical strength, the size and shape of the openings are limited, and it is difficult to achieve the effect. Contents of the invention [0003]...

AI Technical Summary

Problems solved by technology

For traditional radial motors, when the frame size of the motor is large, the space of the rotor is not fully utilized, especially at the forehead of the rotor, the magnetic density is almost zero, so the utilization rate of the rotor core is low and easy to saturate. Difficulty increasing motor torque density

The traditional radial motor solution is to open holes in the forehead of the rotor, but in order to ensure the mechanical strength, the size and shape of the holes are limited, and it is difficult to achieve the effect

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