Sensorless switched reluctance motor
US5589751A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 16, 1993 |
| Grant date | Dec 31, 1996 |
| Priority date | — |
| Expiry date | Dec 16, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P25/089
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A sensorless SRM suitable to drive the SRM based on the position of a rotor detected through the detection of the variation of the current of each phase without providing separate sensors for identifying the position of the rotor includes a motor driving part for driving the motor by exciting phases of the motor in a predetermined sequence, a differentiating part for differentiating the currents exciting the phases of the motor respectively, an amplifying part for amplifying output voltages from the differentiating part to proper levels, and a comparing part for comparing output voltages of the amplifying part with reference voltages respectively to generate a high level signal when the output voltage of the amplifying part is higher than the reference voltage and a low level signal when the output voltage of the amplifying part is lower than the reference voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.