Method for reducing current and torque ripple in a brushed electric motor and motor employing the same
US8247944B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 2009 |
| Grant date | Aug 21, 2012 |
| Priority date | — |
| Expiry date | Nov 20, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01R39/40
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for reducing current and torque ripple in a brushed electric motor is disclosed. The motor includes a stator and a rotor. The stator includes a brush housing having a plurality of circumferentially spaced brushes disposed about a commutator, each brush having a contact face that is in electrical contact with the commutator, an opposed bias face and a peripheral wall, each brush disposed in a brush pocket having a pocket wall, a base and a bias spring that is configured to apply a contact force to the bias face, thereby urging the contact face into electrical contact with the commutator. The method includes inserting a damper between each pocket wall or respective base and the respective brush.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.