A multi-excitation unipolar vernier permanent magnet motor

Abstract

The invention discloses a multi-excitation monopole vernier permanent magnet motor, which belongs to the field of permanent magnet motors. The motor comprises a stator and a rotor which are arranged in a nested manner. The rotor comprises two sections of iron cores which are distributed at intervals along the same axis. Each section of iron core is of a hollow cylindrical structure, each hollow cylindrical structure is composed of a plurality of iron core units provided with through holes and protruding teeth, a Halbach magnetic steel array is distributed between the protruding teeth of each iron core unit, and the adjacent iron core units are separated by magnetic barriers. Multiple connecting magnetic conductive blocks are inserted between the through holes of the two sections of iron core units, and axially magnetized magnetic steel or windings into which a circumferential current is introduced are distributed on the outer sides of the magnetic conductive blocks between the two sections of iron cores. An axial upward excitation magnetic circuit is guaranteed through a monopole structure, an armature magnetic field is blocked by the magnetic barriers in a radial plane, the powerfactor of the motor is improved, the capacity of a driver is reduced, and the application cost is reduced. Meanwhile, because the Halbach magnetic steel arrays are added, the excitation magnetic fieldis improved, the torque density of the motor is increased, and the performance of the motor is improved.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet motors, and more specifically relates to a multi-excitation unipolar vernier permanent magnet motor. Background technique [0002] The control system and automation products of industrial robots mainly involve servo motors, reducers, controllers and sensors. The servo motor is the power system of the industrial robot. It is generally installed at the "joint" of the robot and is the "heart" of the robot's movement. At present, the joint drive of the robot is inseparable from the servo system. The more joints, the higher the flexibility and precision of the robot, and the more servo motors to use. The robot has high requirements for the servo system, which must meet the requirements of fast response, high starting torque, large dynamic moment of inertia ratio, and wide speed range. It must adapt to the shape of the robot to achieve small size, light weight, and acceleration and deceleratio...

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Problems solved by technology

[0005] Aiming at the defects of the prior art, the object of the present invention is to provide a multi-excitation unipolar vernier permanent magnet motor, which aims to solve the problem of low system operation reliability caused by the low power factor of the existing vernier permanent magnet motor

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