AC induction motor and method of starting same
US6787960B2 · kind B2 · utility
1Cited by
8References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 5, 2002 |
| Grant date | Sep 7, 2004 |
| Priority date | — |
| Expiry date | Jul 10, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K17/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An AC induction motor has separate start and run windings radially separated in slots in the stator laminations. The start windings are arranged in the radially outer portions of the slots to aid heat dissipation and to increase the flux linkage so as to reduce inrush current during starting. The motor is started by switching on the start windings initially, and switching on the run windings in phase with the start windings when the motor reaches its running speed, but before switching off the start windings. In this way, the surge current during switching between the start and run windings is reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.