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A motor with irregular tooth tip capable of reducing radial electromagnetic excitation force

An electromagnetic exciting force, irregular technology, applied in the direction of magnetic circuit static parts, magnetic circuit rotating parts, magnetic circuit shape/style/structure, etc., can solve the problem of air gap average magnetic flux density reduction, motor torque and power density reduction, to achieve the effect of reducing the radial electromagnetic excitation force and increasing the circumference of the tooth tip

Active Publication Date: 2017-01-04
TSINGHUA UNIV
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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

Method used

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  • A motor with irregular tooth tip capable of reducing radial electromagnetic excitation force
  • A motor with irregular tooth tip capable of reducing radial electromagnetic excitation force
  • A motor with irregular tooth tip capable of reducing radial electromagnetic excitation force

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Embodiment Construction

[0024] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0025] For general motors, due to the limitation of the saturation flux density of the iron core material, the average flux density of the air gap will basically remain at a fixed and reasonable value. If the average flux density of the air gap is too high, the flux density of the core material will be saturated, and the required exciting current or permanent magnet material will increase; if the average flux density of the air gap is too low, the utilization rate of the core material will decrease. like figure 1 and figure 2 As shown, the teeth 2 of the stator core 1 in an ordinary permanent magnet motor are flat-topped teeth, and the air gaps corresponding to the teeth 2 of each stator core 1 are the same. At the junction of the teeth 2 of the stator core 1 and the air gap, due to the high magnetic permeability of the core material, the magnetic ...

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Abstract

The invention relates to a motor with irregular tooth tops capable of reducing the radial electromagnetic excitation force. The structure of the motor is the same as that of the prior art, and it is characterized by: A number of teeth with irregular tooth tops are set on the stator core and the rotor core at the same time. The tooth tops of the teeth are composed of several small teeth. The structure, as long as the perimeter of the addendum can be increased so that the radial force is a component of the normal force, it will all play a role in reducing the radial electromagnetic excitation force. When the tooth tip of the tooth adopts a sawtooth structure, it can adopt a one-way sawtooth structure or a two-way sawtooth structure, and the included angle between the hypotenuse and radial sides of the sawtooth structure can be selected according to requirements. The invention can be widely used in various motors such as permanent magnet motors, asynchronous motors, electric excitation synchronous motors and switched reluctance motors.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/12H02K1/22
Inventor 王善铭沈靖文曹海翔王祥珩苏鹏声
Owner TSINGHUA UNIV
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