A DC motor capable of reducing slot frequency radial electromagnetic excitation force

Abstract

The invention relates to a direct current motor capable of reducing slot frequency radial electromagnetic excitation force, which comprises a stator frame, a stator core is fixedly arranged in the stator frame, and stator permanent magnet poles are fixedly arranged in the stator core; The core is fixedly arranged on the rotor shaft, and the rotor shaft is fixedly arranged in the stator frame through bearings. Several slots are evenly opened on the outer circumference of the rotor iron core, and the rotor armature winding is arranged in the slots; it is located on one side or both sides of the rotor iron core. , a commutator is set on the rotor shaft; each coil in the rotor armature winding is connected to the commutator, and then connected to an external static power supply circuit through a brush; a magnetic pole core area is also set on the stator core, and the magnetic pole iron The core area is a yoke structure with a uniform magnetic field change composed of protrusions and depressions; the protrusions and depressions are alternately arranged along the circumferential direction and the axial direction. The invention can effectively reduce the vibration of the stator iron core and the stator frame, and achieve the purpose of reducing vibration and noise.

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

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