Commutator and motor

Abstract

The invention provides a commutator and a motor. The commutator comprises a commutator base body and a plurality of commutator segments, wherein the plurality of commutator segments are arranged around the commutator base body along the circumferential direction, and the adjacent commutator segments are provided with a first gap section and a second gap section therebetween which are adjacent to each other along the circumferential direction; each commutator segment is provided with a winding wiring portion at the second end along the axial direction, and the first end of the commutator segment along the axial direction is away from the winding wiring portion; the width L2 of the second gap section between the second ends of the adjacent commutator segments is greater than the width L1 ofthe first gap section between the first ends; and the width L2 of the second gap section is less than the width L3 of the spacing between the winding wiring portions of the adjacent commutator segments. According to the technical scheme of the invention, the setting of the width-varying gap between the adjacent commutator segments increases the spacing of burr-prone areas during the processing process so as to avoid the risk of short circuits one the one hand; and on the other hand, the working area of the commutator is kept to have a narrow spacing, thereby improving the EMC, reducing the airnoise and vibration, and enabling the motor performance to be more stable.

Description

Technical field [0001] This application relates to the field of motors, and in particular to a commutator. Background technique [0002] The commutator is an important part of the armature of the DC motor and the AC commutator motor. It plays a role of commutation when the motor is rotating, so that the motor can continue to rotate. As an important basic equipment indispensable in industry, transportation, national defense and daily life, the downstream industries of motors include almost all basic industries of the national economy. As one of the core components of the motor, the commutator is also growing with the development of the motor industry. [0003] At present, it has been confirmed that the noise, vibration and EMC of the motor are proportional to the width of the commutator gap, that is, the smaller the gap width, the better the EMC, and the smaller the noise and vibration. However, considering the process, the gap width cannot be reduced arbitrarily in the prior art...

AI Technical Summary

Problems solved by technology

Burrs are unavoidable in the commutator segment during the turning process, and burrs are prone to appear especially at the end of the cutting tool

At this time, if the gap width is set too narrow, it is easy to cause the burrs of two adjacent commutator segments to contact each other and cause a short circuit, or it is easy to cause the burr of one commutator segment to contact the adjacent commutator segment. The problem of short circuit caused by contact between chips

Therefore, to avoid short-circuit phenomena, the minimum value of the gap width is limited

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