Motor for reducing polar-frequency radial electromagnetic exciting force and slot-frequency radial electromagnetic exciting force

Abstract

The invention relates to a motor for reducing a polar-frequency radial electromagnetic exciting force and a slot-frequency radial electromagnetic exciting force. The motor comprises a stator base in which a stator core is fixedly arranged. A rotor shaft is fixedly arranged in the stator base through bearings. A rotor core is fixed on a rotor shaft. The motor is characterized in that the motor further comprises a stator permanent magnetic pole, a rotor armature winding and a collector ring; the stator permanent magnetic pole is fixed in the stator core; the stator core is arranged between the N pole and the S pole of the stator permanent magnetic pole; the outer circumference of the rotor core is provided with a plurality of troughs uniformly; the rotor armature winding is arranged in the troughs; at one side or two sides of the rotor core, a collector ring is arranged on the rotor shaft; and after each winding in the rotor armature winding is connected with the collector ring, the winding is connected with an external stationary power supply circuit through an electric brush. The motor of the invention can effectively reduce vibration between the stator core and the stator base, thereby performing a function of reducing vibration and noise.

Description

technical field [0001] The invention relates to a motor, in particular to a motor whose excitation source is located in the stator for reducing the radial electromagnetic excitation force of pole frequency and slot frequency. 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...

AI Technical Summary

Problems solved by technology

These two types of electromagnetic exciting forces are caused by the nature of the motor, and it is extremely difficult to reduce and weaken these electromagnetic exciting forces

At present, methods such as reducing magnetic density, chute or closed slot are often used, but the result is either that the volume, weight and cost of the motor increase, or the effect is not obvious

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

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