Motor with irregular tooth crests for reducing radial electromagnetic exciting force

Abstract

The invention relates to a motor with irregular tooth crests for reducing radial electromagnetic exciting force. The structure of the motor is the same as that of the motor in the prior art. The motor is characterized in that a plurality of teeth with irregular tooth crests are arranged on a stator core or a rotor core, or are simultaneously arranged on the stator core and the rotor core, the tooth crests of the teeth consist of a plurality of small teeth, each small tooth adopts a zigzag-shaped, ladder-shaped, semicircle-shaped, semi-elliptic-shaped, or wave-shaped structure. As long as the perimeters of the tooth crests are increased, the radial force is changed into the component force of the normal force, and the action for reducing the radial electromagnetic exciting force can be exerted. When the tooth crests of the teeth adopt the zigzag-shaped structures, the structures with one-way zigzags can be adopted, the structures with two-way zigzags can also be adopted, and included angles between the bevel edges and the radial edges of the zigzag-shaped structures can be selected according to requirements. The motor disclosed by the invention can be widely applied to various motors, such as permanent magnet motors, asynchronous motors, electro-magnetic synchronous motors, switch reluctance motors and the like.

Description

technical field [0001] The invention relates to a motor, in particular to a motor with irregular tooth tops capable of reducing 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 types of motors generate vibration and noise during rotation. Noise is a kind of environmental pollution. If people work in a noisy environment for a long time, it will have adverse effects on health; vibration and noise in the military field will also cause harm; in daily life, excessive motor noise will also cause There must be a problem. The noise of household appliances should be as small as possible, so as not to affect the normal life of people in th...

AI Technical Summary

Problems solved by technology

[0007] It can be seen from the above formula that by reducing the radial magnetic flux density B r The radial electromagnetic force per unit area can be reduced, but the radial magnetic flux density B can be directly reduced r It will lead to the reduction of the average magnetic flux density of the air gap of the motor, which will reduce the torque and power density of the motor

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