Brushless motor
US7652402B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 2007 |
| Grant date | Jan 26, 2010 |
| Priority date | — |
| Expiry date | Jan 30, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K5/207
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A plurality of coils wound around a stator magnetic-pole core are connected together and connected to output wires by use of a bus bar. The bus bar having a generally cylindrical body portion is disposed at one axial end of the stator magnetic-pole core, around which the coils are wound such that clearances are formed within magnetic-pole core slots, with an axial clearance formed between the bus bar and the coils. The body portion has such a radial dimension that at least a portion of the clearances within the magnetic-pole core slots is left uncovered. Air holes are formed in the motor housing on opposite sides of the stator magnetic-pole core to thereby form cooling air passages extending through the magnetic-pole core slots.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.