Stator for DC motor

Abstract

A stator used for dc motors belongs to the producing technology field of motors, and mainly consists of a winding (8) and a stator core (7) with a permanent magnet (5), and the like, and the permanent magnetic field direction of a permanent magnet (15) is vertical to the excitation magnetic field direction of a stator core (17). Excitation and permanent magnetic composite stators then formed causes the structure design of the dc motor stator to be more reasonable and scientific, and after the dc motor is formed by the stator and a rotor, the changes of the lead-angle of current are caused to be matched with and adapted to the magnetic field of the excitation and permanent magnetic composite stator so as to effectively intensify and change the distribution of magnetic field and density, overcome a low torque area, change the output characteristics of motors, and effectively reduce additional resistance load. The power saving effect is obvious.

Description

technical field [0001] The invention relates to a stator for a DC motor, which belongs to the technical field of motor manufacturing. Background technique [0002] There are small and medium power DC motors widely used in electric vehicles, light industrial products, and household appliances, or carbon brush commutation motors with parallel excitation, series excitation or complex excitation. In this way, the torque generated by the rotor coil at different angular positions in the magnetic field is different and alternates. Taking a single-turn rectangular planar coil as an example, when the coil plane is perpendicular to the magnetic field, the coil will not generate a rotational moment, and the coil will rotate by inertia. The above situation will inevitably lead to unsmooth speed. When the load is applied, the running vibration of the motor will inevitably occur. This will increase the harmful additional dynamic load and do more useless work, thus resulting in a decrease...

AI Technical Summary

Problems solved by technology

The above situation will inevitably lead to unsmooth speed. When the load is applied, the running vibration of the motor will inevitably occur. This will increase the harmful additional dynamic load and do more useless work, thus leading to a decrease in the efficiency of the motor.

This is also the problem of low efficiency, high power consumption, and short range of electric vehicles currently using DC motors as power devices.

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