Simple starting sequence for variable reluctance motors without rotor position sensor
US5051680A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 8, 1989 |
| Grant date | Sep 24, 1991 |
| Priority date | — |
| Expiry date | Dec 8, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/185
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rotor position sensing system (10) for a variable reluctance motor having a plurality of phases .PHI..sub.1 -.PHI..sub.3 with each phase having a phase winding wound on stator poles (18, 20 and 22) and first and second switches (Q.sub.1 and Q.sub.2, Q.sub.3 and Q.sub.4, and Q.sub.5 and Q.sub.6) each having a first terminal, a control terminal and a second terminal, the control terminal of each switch having a control signal applied thereto to switch the switch between on and off states, the first terminal of the switch being coupled to a first power supply potential (30), the second terminal of the first switch being coupled to the phase winding, the first terminal of the second switch being coupled to a second power supply potential (32) and the second terminal being coupled to the phase winding which senses rotor position prior to activation of the phase windings to starting rotation of the rotor in accordance with the invention that includes a current sensor (34), coupled to each phase winding, for producing an output signal of a magnitude of current flowing in the windings; and a controller (26), coupled to each current sensor and to each control terminal of the switches, for…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.