Motor energizing circuit
US4868478A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 1988 |
| Grant date | Sep 19, 1989 |
| Priority date | — |
| Expiry date | Jun 8, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P25/089
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Energizing system for a reluctance motor having at least two phases. A sensing and control circuit (1-5) which is constructed to indicate the inductance, or a clearly related magnitude, in the winding in the phase which is next to be energized or activated. The circuit is also constructed to detect the current in the winding in the energized phase and to correct the indicated value of the inductance, or related magnitude, with an operating parameter which has a dependency on the current value in the winding of the energized phase, and to compare this corrected value with a reference value and to utilize the rotational position of the motor rotor, when the corrected value coincides with the reference value, as a starting point for determining a rotational position for changing the energizing state of the phase winding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.