Method for manufacturing a brush-commutated direct-current motor

Patent metadata

Field	Value
Publication number	US-10320273-B2
Application number	US-201515501323-A
Country	US
Kind code	B2
Filing date	Aug 12, 2015
Priority date	Aug 12, 2014
Publication date	Jun 11, 2019
Grant date	Jun 11, 2019

Abstract

A brush-commutated direct-current motor comprises a stator with a plurality of exciter poles, a rotor with a plurality of pole teeth, which is rotatable relative to the stator about an axis of rotation, grooves arranged between the pole teeth, and coil windings arranged on the pole teeth and a commutator which is arranged on the rotor and a plurality of lamellae to which the coil windings are connected. For manufacturing such direct-current motor the coil windings are arranged on the pole teeth in winding cycles, in each of which a coil winding is wound onto each pole tooth. It is provided that on each pole tooth a first coil winding wound around the pole tooth in a first winding direction and a second coil winding wound around the pole tooth in a second winding direction opposite to the first winding direction are arranged.

First claim

The invention claimed is:

1. A method for manufacturing a brush-commutated direct-current motor which includes
a stator with a plurality of exciter poles,
a rotor rotatable relative to the stator about an axis of rotation, comprising a plurality of pole teeth, grooves arranged between the pole teeth, and coil windings arranged on the pole teeth, and
a commutator which is arranged on the rotor and includes a plurality of lamellae to which the coil windings are connected, the method comprising:
wherein the coil windings are arranged on the pole teeth in winding cycles in which one coil winding each is wound onto each pole tooth,
wherein on each pole tooth a first coil winding wound around the pole tooth in a first winding direction and a second coil winding wound around the pole tooth in a second winding direction opposite to the first winding direction are arranged, wherein
in a first winding cycle the first coil windings are wound on a first group of the pole teeth and the second coil windings are wound on a second group of the pole teeth, and
in a second winding cycle the second coil windings are wound on the first group of the pole teeth and the first coil windings are wound on the second group of the pole teeth.

2. The method according to claim 1 , wherein the second group of the pole teeth comprises the pole teeth not contained in the first group of the pole teeth.

3. The method according to claim 1 , wherein
for the first group of the pole teeth the first coil winding is wound onto the respectively associated pole tooth and the second coil winding circumferentially is wound onto the first coil winding, and
for the second group of the pole teeth the second coil winding is wound onto the respectively associated pole tooth and the first coil winding circumferentially is wound onto the second coil winding.

4. The method according to claim 1 , wherein the first group comprises N/2+1 of the pole teeth and the second group comprises N/2−1 of the pole teeth, wherein N corresponds to the number of pole teeth of the rotor and is an odd integral number.

5. The method according to claim 1 , wherein the first coil winding is connected with a first lamella via a first connecting arm and with a second lamella via a second connecting arm, wherein the first connecting arm and/or the second connecting arm of the first coil winding are laid around at least one other pole tooth towards the respectively associated lamella.

6. The method according to claim 5 , wherein the first winding arm of the first coil winding is laid around exactly one pole tooth adjacent to the associated pole tooth in circumferential direction and the second winding arm of the first coil winding is laid around exactly one pole tooth adjacent to the associated pole tooth against the circumferential direction.

7. The method according to claim 5 , wherein the first connecting arm of the first coil winding extends through a first groove adjacent to the associated pole tooth in the circumferential direction, around a pole tooth adjacent to the associated pole tooth in the circumferential direction, and through a second groove different from the first groove towards the associated first lamella.

8. The method according to claim 5 , wherein the second connecting arm of the first coil winding extends through a third groove adjacent to the associated pole tooth against the circumferential direction, around a pole tooth adjacent to the associated pole tooth against the circumferential direction, and through a fourth groove different from the third groove towards an associated second lamella.

9. The method according to claim 5 , wherein the second coil winding is connected to adjacent lamellae via a first connecting arm and via a second connecting arm.

10. The method according to claim 9 , wherein the first connecting arm of the first coil winding is connected to a first lamella which in circumferential direction is offset to the adjacent lamellae to which the connecting arms of the second coil winding are connected.

11. The method according to claim 9 , wherein the second connecting arm of the first coil winding is connected to a second lamella which against the circumferential direction is offset to the adjacent lamellae to which the connecting arms of the second coil winding are connected.

12. The method according to claim 9 , wherein the first connecting arm and the second connecting arm of the second coil winding intersect.

13. The method according to claim 1 , wherein the number of pole teeth corresponds to an odd, integral number and the number of lamellae corresponds to twice the number of pole teeth.

14. The method according to claim 1 , wherein the number of exciter poles is six and
the number of pole teeth is nine and the number of lamellae is 18, or
the number of pole teeth is seven and the number of lamellae is 14, or
the number of pole teeth is eleven and the number of lamellae is 22.

15. The method according to claim 1 , wherein the coil windings are manufactured as concentrated windings.

16. The method according to claim 1 , wherein jumpers for shorting two or more lamellae are manufactured in the first and/or the second winding cycle.

17. The method according to claim 16 , wherein the jumpers for shorting two lamellae with at least one portion each are laid around at least one pole tooth by each extending from a lamella through a groove between two pole teeth, around at least one pole tooth and through another groove to another lamella.

18. The method according to claim 16 , wherein the jumpers each short exactly three lamellae.

19. The method according to claim 16 , wherein the coil windings and the jumpers are formed of a continuous wire.

Assignees

• Brose Fahrzeugteile

Inventors

• Ben Helal Akram
• Roeder Walter
• Heim Norbert
• Bartoschek Johannes

Classifications

• H02K13/006

  Structural associations of commutators · CPC title

• H02K23/28 Primary

  having open windings, i.e. not closed within the armatures · CPC title

• H02K15/0056

  Electricity · mapped topic

• H01R39/32

  Connections of conductor to commutator segment · CPC title

• H02K13/04

  Connections between commutator segments and windings · CPC title