Brushless DC motor having multiple parallel windings
US8283831B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 2, 2011 |
| Grant date | Oct 9, 2012 |
| Priority date | — |
| Expiry date | Sep 2, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K37/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A brushless DC motor has at least three stator sections and a single rotor rotating with the three stator sections. Each stator section is wound with three parallel windings having respective three nodes. Each stator section has nine terminals providing independent access to each node so that separate voltages and currents are applied to each parallel winding in the stator section. Thus, the current applied to each stator section is divided substantially equally among the three parallel windings, thereby reducing the current in each winding for the same power requirement for the motor, which reduces the I2R losses in the windings and the supply wiring and reduces the power handling requirements in the electronic switches providing the supply voltages. The three parallel windings are connected to external terminals of the motor to form either a delta winding configuration or a wye (star) winding configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.