Patent · US Active

Brush arrangement for electrical machine

US8686612B2 · kind B2 · utility

21Cited by

2References

17Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Gerald Roos · Achern, DE
Pierre Bernard · Henry County 150, CA

Key dates

Filing date	Mar 19, 2010
Grant date	Apr 1, 2014
Priority date	—
Expiry date	May 24, 2030

Classification

Technology area (CPC H)Electricity
CPC primaryH02K23/32
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An electrical machine, in particular an electric motor, has a first number (k) of commutator laminates (10, 12, 14) and brushes (16, 18), wherein the commutator laminates (10, 12, 14) are arranged distributed uniformly in the circumferential direction of a circumference of a laminate support (24). The brushes (16, 18) are arranged such that commutation times are distributed as uniformly as possible in order to reduce current ripple when using a wave winding and a number of brushes (16, 18) which is less than a number of poles (2p) in the electrical machine.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.