Electrode and slot number matching of wheel motor and rule structure therefor

Abstract

The invention is a kind of polar slot quantity mating and the line inserting structure for a kind of carriage wheel engine. The proportion of each phase and each slot is <= 1 / 2-1 / 3, and sets the slot interval of the coil is 1, two coil sides are embedded in the same slot, one is used as the stop edge of the coil, another is the starting edge of another coil. The engine with low speed and large angular force, low torque pulse and high power density can be designed with the invention, in order to be used as the direct-driving engine for the electric automobile. The invention is convenient to be carried on with coil inserting and end arrangement; it can save the copper material and can reduce the length, volume and weight of the engine.

Description

technical field [0001] The invention belongs to motors, and relates to a pole slot number matching and an embedded wire structure of a wheel motor. Background technique [0002] In the prior art, the multi-phase stator winding of the motor usually has fewer poles of the rotor, more slots of the stator, and a larger pitch of the slots of the coil. Low torque machinery. Currently, the technology of electric vehicles using electric motors as the driving mechanism is developing rapidly, wherein the electric motors are used to directly drive the wheels of the vehicle. Because the running speed of the car changes greatly and the force of several wheels varies greatly, it is necessary for the motor to not only have high torque, flat appearance, light weight and high efficiency, but also require low speed, high torque and low torque ripple. This shows that the existing high-speed low-torque motor is not suitable for electric vehicles. In order to achieve the low speed and high to...

AI Technical Summary

Problems solved by technology

In order to achieve the low speed and high torque required by the direct drive of the motor, it is necessary to increase the number of poles of the rotor, but when the number of poles of the rotor increases, the number of slots of the stator will also increase proportionally, which will cause manufacturing difficulties such as processing and assembly

If you want to relatively reduce the number of slots under the requirement of increasing the number of poles, you need to increase the slot area to make up for it, but in this case, the cross-sectional area of ​​the coil side of the winding will also increase, causing difficulties in embedding wires and end finishing

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