Electronically commutated DC motor comprising a bridge circuit
US6903526B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 2003 |
| Grant date | Jun 7, 2005 |
| Priority date | — |
| Expiry date | Mar 25, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/34
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electronically commutated DC motor comprises a stator comprising at least one stator winding (22, 24, 26), a rotor (28) electromagnetically interacting with the stator, a positive and a negative DC voltage line (76, 78) for supplying power to the motor (20), in particular from a battery (77), a full bridge circuit (74) for controlling the current in the at least one stator winding (22, 24, 26), which full bridge circuit (74) comprises a plurality of bridge arms that each comprise an upper bridge transistor (66, 80, 86) for controlling the current from the positive DC voltage line (76) to an associated terminal (68; 82; 88) of that stator winding (22, 24, 26) as well as a lower bridge transistor (70, 84, 90) for controlling the current from the relevant terminal of the stator winding to the negative DC voltage line (78). The motor further comprises an arrangement for generating a plurality of rotor position signals, and an arrangement for controlling a predetermined bridge transistor by logical combination of rotor position signals associated therewith, there being provided, for logical combination of those rotor position signals, a control transistor (60) to whose base a first r…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.