Permanent-magnet variable-speed hub motor with complementing excitation rotor

Abstract

The invention relates to a permanent-magnet variable-speed hub motor with a complementing excitation rotor. Two groups of excitation magnetic sources of which the polarities complement are arranged at the inner rotor surface of a hub, a main magnetic flux source excitation body and an auxiliary magnetic flux source excitation body are respectively configured with alternate polarities by a plurality of permanent magnets in a rotor yoke to form an annular shape which takes a stator shaft as the center, a polar distance is staggered between the peripheral polarity distributions of the auxiliary magnetic flux source excitation body and the main magnetic flux source excitation body, a stator and the stator shaft are matched via a spline to form a stator which can move axially, and a plurality of rollers which push the stator shaft to move axially through an eccentric exercise are arranged between a track plate arranged in a left end cover of the hub and a push disc arranged on the stator, so that the magnetic flux is reduced due to the axial motion of the stator to change the torque-rotating speed properties of the motor and realize speed changing. According to the invention, Not only can the mechanical properties of the permanent-magnet variable-speed hub motor per se be improved, but also the full power speed regulating ranges of the permanent-magnet variable-speed hub motor can be increased, meanwhile, the motor size is not increased, and the production cost is saved.

Description

technical field [0001] The invention relates to a permanent magnet brushless motor, in particular to a permanent magnet variable speed wheel hub motor designed for driving an electric vehicle with a complementary excitation rotor. Background technique [0002] The permanent magnet brushless motor used for the power unit of the electric two-wheel vehicle in the prior art usually adopts a low-speed hub motor, which saves the mechanical transmission, does not need lubrication, has low noise, and is maintenance-free. It has been widely used in the field of electric two-wheel vehicles. widely used. However, due to its own mechanical characteristics, this low-speed in-wheel motor can only be adjusted by reducing the speed, but not by increasing the speed with constant power. In practical applications, the climbing ability is poor and the speed cannot be increased. The mechanical characteristics of the motor refer to the functional relationship between the torque output by the mot...

AI Technical Summary

Problems solved by technology

Due to the complex structure of the motor using this method, the cost is increased and other factors, and the technical effect is also unsatisfactory.

Images