Motor manufacturing method and motor manufacturing system

Patent metadata

Field	Value
Publication number	US-12451773-B2
Application number	US-202017626813-A
Country	US
Kind code	B2
Filing date	Jun 23, 2020
Priority date	Jul 19, 2019
Publication date	Oct 21, 2025
Grant date	Oct 21, 2025

Abstract

The present disclosure relates to a method and system for manufacturing a motor in which noise and current ripple caused by mechanical friction between a brush and a commutator have been reduced. In detail, a motor manufacturing method of the present disclosure comprises the steps of: assembling a shaft, an armature fixed on the shaft to be rotatably arranged, a commutator fixed on the shaft to rotate together with the armature, and a brush contacting a portion of the surface of the commutator; applying a voltage to the brush and rotating the armature and the commutator together through the rotation of the shaft to age the surface of the commutator; and, in a magnetizing device, connecting a case including a magnetized magnet to the assembled shaft, armature, commutator, and brush.

First claim

The invention claimed is:

1. A motor manufacturing method comprising:
assembling a shaft, an armature fixed to the shaft and rotatably disposed, a commutator fixed to the shaft and rotating together with the armature, and a brush in contact with a portion of a surface of the commutator;
in a state that a magnetized magnet is not connected, aging a contact surface of the brush and the commutator by applying a voltage to the brush and rotating the armature and the commutator together through rotation of the shaft; and
connecting a case including the magnetized magnet magnetized in a magnetizing device to the assembled shaft, armature, commutator and brush,
wherein rotating the armature and the commutator together through rotation of the shaft comprises rotating the shaft in a first direction during a first time period and rotating in a second direction opposite to the first direction during a second time period, and
wherein the first time period and the second time period are set to different time ranges.

2. The motor manufacturing method of claim 1 , wherein aging a contact surface of the brush and the commutator by applying a voltage to the brush and rotating the armature and the commutator together through rotation of the shaft comprises forming a carbon layer on the surface of the commutator by applying a current to the commutator by the voltage applied to the brush.

3. The motor manufacturing method of claim 2 , wherein the voltage applied to the brush is set to a voltage equal to or higher than a voltage at which exothermic dissolution starts by applying the current to the commutator by the voltage applied to the brush.

4. A motor manufacturing method comprising:
assembling a shaft, a commutator fixed to the shaft and rotatably disposed, and a brush in contact with a portion of a surface of the commutator;
in a state that a magnetized magnet is not connected, aging a contact surface of the brush and the commutator by applying a voltage to the brush and rotating the commutator together through rotation of the shaft; and
connecting a case, which includes an armature and the magnetized magnet magnetized in a magnetizing device, to the assembled shaft, the commutator and the brush,
wherein rotating the commutator together through rotation of the shaft comprises rotating the shaft in a first direction during a first time period and rotating in a second direction opposite to the first direction during a second time period, and
wherein the first time period and the second time period are set to different time ranges.

5. The motor manufacturing method of claim 4 , wherein aging a contact surface of the brush and the commutator by applying a voltage to the brush and rotating the commutator together through rotation of the shaft comprises forming a carbon layer on the surface of the commutator by applying a current to the commutator by the voltage applied to the brush.

Assignees

• Hl Mando Corp

Inventors

• An young kyu

Classifications

• H02K15/00 Primary

  Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines · CPC title

• H02K13/10

  Arrangements of brushes or commutators specially adapted for improving commutation · CPC title

• H01R39/04

  Commutators (wherein the segments are formed by extensions of dynamo-electric machine winding H02K) · CPC title

• H01R39/045

  the commutators being made of carbon · CPC title

• H02K13/006 Primary

  Structural associations of commutators · CPC title