Magnetic field speed reduction type low speed large torque moment permanent-magnet brushless DC motor

Abstract

The invention discloses a magnetic field speed reducing type low-speed high-torque permanent brushless DC Motor, which comprises an inner stator, an external stator and a rotator between the inner and the external stators. The inner stator is composed of an inner stator core grooved along the peripheral direction and an armature winding in the groove. The external stator is composed of an annular stator core and an N pole and an S pole permanent magnet fixed on the inner surface of the annular stator core and arranged alternately. The rotator is composed of a magnetizer and a non-magnetizer arranged at intervals. In virtue of the modulation function of the rotator, the armature field causes the rotary speed of the air gap field at the inner stator side and the air gap field at the permanent magnet side to form the rotation ratio, thus realizing the speed reduction of the magnetic field. Under the function of the magnetic field with different speed at the sides of the inner stator and the permanent magnet, the speed is reduced obviously and the aim of low speed and high torque is realized. The invention simplifies the structure of a power-driven system and the motor works reliably and responds rapidly.

Description

technical field [0001] The invention relates to a permanent magnet brushless DC motor, in particular to a magnetic field deceleration type low-speed and high-torque permanent magnet brushless DC motor, belonging to the technical field of motor manufacturing. Background technique [0002] The motor is an essential and important part of the transmission system, and the motor with superior performance can make the entire transmission system have a broader application prospect. Traditional motors rotate at a high speed, which is difficult to meet the needs of various industrial equipment. A large number of mechanical loads require low-speed and high-torque operation, so the motor must be used with a huge reduction mechanism. The electric drive system is generally driven by a motor to drive a mechanical transmission component, and a mechanical gearbox is a relatively common mechanical transmission component. When the motor is driven by gears, it not only increases the size and w...

AI Technical Summary

Problems solved by technology

When this kind of permanent magnet gear is driven jointly with a permanent magnet brushless DC motor, the torque and torque density of the entire system have been significantly improved, but it belongs to two-stage transmission, the system response is slow, and the structure is relatively complicated.

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