Radial magnetic field axial parallel composite motor

Abstract

The invention relates to the field of motor design, and discloses a radial magnetic field axial parallel composite motor. The radial magnetic field axial parallel composite motor is characterized in that a radial magnetic field speed regulation motor and a radial magnetic field torque regulation motor which are coaxially arranged are arranged in a shell in parallel, and the radial magnetic field speed regulation motor comprises a rotating shaft, a first rotor surrounding the rotating shaft and a first stator surrounding the first rotor; the radial magnetic field speed regulation motor comprises a rotating shaft, a second rotor surrounding the rotating shaft and a second stator surrounding the second rotor; and air gaps are formed between the first stator and the first rotor and between thesecond stator and the second rotor; the first stator is fixed to the inner wall of the end face of the shell and rotationally connected with the rotating shaft, the second stator is axially and rotationally connected with the first stator, the first rotor and the second rotor are axially and fixedly connected through the magnetic isolation ring, and the radial inner edges of the two rotors are fixed to the rotating shaft. On the premise that the operation reliability of the permanent magnet is improved, the requirements for low-speed high-torque and wide-speed-regulation-range operation of the driving motor can be met.

Description

technical field [0001] The invention relates to the field of motor design, in particular to a compound motor with radial magnetic field and axial parallel. Background technique [0002] High torque density, high torque at low speed and wide speed range are the performance requirements of drive motors, especially direct drive motors. The widely used switched reluctance motor has a wide speed range and a simple structure. There are no permanent magnets on the stator and rotor, and the work reliability is high. However, its torque density is significantly lower than that of the permanent magnet motor. In recent years, the stator permanent magnet motor has been widely studied due to its high torque density and high efficiency. In this motor structure, the permanent magnets and windings are placed on the stator, and the rotor structure is simple, which improves the reliability and dynamics of the motor. run performance. However, due to the inherent characteristics of permanent ...

AI Technical Summary

Problems solved by technology

However, the high-speed field-weakening speed regulation in the speed regulation process of this kind of motor will reduce the performance of the permanent magnet, and in severe cases, it will cause irreversible demagnetization of the permanent magnet.

In addition, in the hybrid excitation stator permanent magnet motor structure, there are permanent magnets and two sets of windings (field winding and armature winding) in the stator at the same time. The torque output capacity is limited, and since the heat source is located in the stator, it is easy to cause the temperature of the stator winding and the permanent magnet to rise too high, resulting in damage to the winding insulation and irreversible demagnetization of the permanent magnet

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