Direct-drive electric motor modulated basing on space magnetic field

Abstract

The invention relates to a direct-drive motor modulated basing on a space magnetic field, which can output larger and stable torque at lower speed and solve the problem that a traditional direct-drive motor has big volume. An outer rotor (1) of the motor is used as a casing of the motor and is rotationally connected with a motor shaft (7) through a bearing (8), and a permanent magnet (3) is uniformly embedded on a rotor yoke (2) in the circumference direction; an inner stator (5) adopts a traditional outer rotor permanent magnetic brushless DC motor stator structure, a static adjustable magnetic ring (4) is directly sleeved on the surface of the inner stator (5) by adopting a cup-shaped structure, leaving out a gap between the static adjustable magnetic ring (4) and the inner stator (5), and then the motor is changed into a single void institution; the static adjustable magnetic ring (4) is composed of adjustable magnetic magnets (9) and non-adjustable magnetic magnets (10) distributed at intervals in the circumference direction; the motor shaft (7) is used for fixing the inner stator (5) of the motor and the static adjustable magnetic ring (4) and is simultaneously connected withthe outer rotor (1) through the bearing (8).

Description

technical field [0001] The invention relates to a direct drive motor based on spatial magnetic field modulation, which belongs to the technical field of special motor manufacturing. Background technique [0002] In order to avoid problems such as high noise, low efficiency, low transmission accuracy, slow response, and mechanical wear of mechanical gear transmission systems in industrial production, direct drive motors are often required. However, the traditional direct drive motor has low speed, bulky size and high cost. Magnetic gear is a new type of gear structure. It has the advantages of low noise, maintenance-free, high reliability, large torque transmission capacity, and automatic overload protection. It is integrated with an ordinary permanent magnet brushless outer rotor motor to form a composite motor. , the compact structure of this motor can simultaneously realize the control of high-speed motor and the output of high-torque direct drive at low speed. Therefore,...

AI Technical Summary

Problems solved by technology

[0003] Technical problem: By proposing a direct-drive motor based on spatial magnetic field modulation, the present invention solves the problems of low power density, mechanical wear and noise of the mechanical speed-increasing gearbox in the existing transmission device and the volume of the traditional direct-drive motor. At the same time, the inner rotor of a magnetic gear and the two-layer air gap are omitted on the basis of the traditional magnetic gear structure, which simplifies the manufacturing process, reduces the volume, weight and manufacturing cost of the motor, improves the efficiency, and at the same time Eliminates the large vibration and noise caused by the inner rotor of the magnetic gear

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