Rotor position sensing in a dynamoelectric machine using coupling between machine coils
US5701064A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1995 |
| Grant date | Dec 23, 1997 |
| Priority date | — |
| Expiry date | Oct 27, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P25/089
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A polyphase dynamoelectric machine (10) such as a switched reluctance motor has a stator assembly (12) and a rotor assembly (14). The rotor assembly is movable with respect to the stator assembly. The stator assembly includes a stator (16) having a plurality of stator poles (18). The rotor assembly includes a rotor (20) having a plurality of rotor poles (22). The stator assembly further includes a plurality of separately energizable stator windings (24) associated with the respective machine phases. These stator windings are energized and de-energized in a predetermined sequential manner to sequentially activate and deactivate the machine phases. Energization and de-energization of the respective stator windings is at least partially determined as a function of the machine's instantaneous rotor position. The machine includes a processor (26) for determining the rotor position. The processor monitors the waveform of a circulating current coupled from an energized stator winding for an active machine phase into a de-energized stator winding for an inactive machine phase. Respective energized and de-energized stator windings are interconnected to form a closed circuit path by which th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.