DC motor capable of reducing groove frequency radial electromagnetic excitation force

Abstract

The invention relates to a DC motor capable of reducing groove frequency radial electromagnetic excitation force. The DC motor comprises a stator base. The stator base is internally and fixedly provided with a stator core. A stator permanent magnet pole is fixedly arranged in the stator core. A rotor core is fixedly arranged on a rotor shaft. The rotor shaft is fixedly arranged in the stator base through a bearing. The rotor core is circumferentially and uniformly provided with a plurality of grooves. The grooves are provided with rotor armature windings respectively. A commutator is arranged on the rotor shaft and arranged at one side or two sides of the rotor core. Each coil in the rotor armature windings is connected with the commutator, and is connected with an external static power supply circuit through an electric brush. The stator core is provided with a pole core area. The pole core area is of a magnet yoke structure formed by convex portions and concave portions and having uniform magnetic field changing, wherein the convex portions and the concave portions are in alternative arrangement in the axial direction and along the peripheral direction. The method can effectively reduce vibration of the stator core and the stator base, and thus the purpose of reducing vibration and noise is achieved.

Description

technical field [0001] The invention relates to a DC motor, in particular to a DC motor capable of reducing the groove frequency radial electromagnetic excitation force. Background technique [0002] Modern society cannot do without motors, and motors are used in transportation, industrial and agricultural production, information processing, and various fields of daily life. There are many types of motors with different structures, such as asynchronous motors, permanent magnet motors, electric excitation motors, etc. All kinds of motors will generate vibration and noise during the rotation process. Vibration noise is a kind of environmental pollution, which will have adverse effects on people's health and daily life; vibration and noise are more important in the military field. Therefore, it is of great significance to reduce the vibration and noise of the motor. [0003] The fundamental magnetic field and a series of harmonic magnetic fields exist in the air gap of the mo...

AI Technical Summary

Problems solved by technology

This type of electromagnetic exciting force is caused by the nature of the motor, and it is extremely difficult to reduce and weaken this electromagnetic exciting force

At present, inclined grooves or closed grooves are often used, but the effect of inclined grooves is not obvious, and the process is complicated; closed grooves will also increase the difficulty of the process

So far, there is no better solution to motor vibration and noise

Images