A new type of external rotor magnetic gear composite motor is proposed by combining the magnetic gear and the BLDCM. The external rotor composite motor is composed of the motor part and the magnetic gear part from the inside to the outside. The external rotor of the motor is combined with the internal rotor of the magnetic gear. When the electric machine is powered on, the external rotor of the motor is driven to rotate by the electromagnetic induction principle. At this time, the magnetic gear The inner rotor of the wheel rotates synchronously with the outer rotor of the motor. According to the magnetic field modulation principle of the magnetic pole piece, the outer rotor of the magnetic gear can rotate at a low speed as the output end. This not only realizes the direct drive mode of low speed and large torque, but also greatly reduces the size and volume of the whole device, which greatly improves the efficiency of the whole transmission device.
A new type of outer rotor composite motor composed of magnetic gears is proposed to be used in wind power generation. First of all, the low-speed outer rotor topology can be directly coupled with the fan blades, so that the reducer and generator in the whole engine room can be combined, which not only greatly reduces the volume of the whole host part, but also improves the utilization rate of wind energy. In addition, the magnetic gathering function of the concentric magnetic gear makes the BLDCM suitable for high-speed operation, so as to achieve high torque density transmission. The magnetic gear can only isolate the inner rotor and the outer rotor from the structure, so as to reduce the maintenance cost and noise. At the same time, compared with the traditional wind turbine, the hybrid wind turbine has the advantages of small size, low weight and cost saving, which make the magnetic gear have great application value in the practical application of wind turbine.
It has been proposed that an outer rotor composite motor composed of magnetic gears can be used in electric vehicles, which can realize direct drive at low speed and high-speed rotation of the motor. In this paper, finite element analysis in time domain and MATLAB / Simulink simulation are used to analyze the static and dynamic characteristics of the motor, and it is proved that the device can be used in electric vehicles to reduce the volume of the reduction mechanism and reduce the friction and wear.
A new type of external stator magnetic gear composite motor, called electromagnetic stepless transmission, is proposed. Its principle is the same as that of external rotor composite motor, but its structure is opposite. The internal rotor of the composite motor is integrated by the magnetic gear located inside the device and the external brushless DC motor. The device uses the pole piece as the output rotor and drives the inner rotor of the motor to rotate. When the motor is powered on, the outer rotor of the magnetic gear rotates synchronously with the inner rotor of the motor, while the inner rotor and the outer rotor of the magnetic gear output energy through the magnetic field modulation of the magnetic pole piece, so as to achieve the purpose of low-speed and high torque direct drive.