Hysteresis control in switched reluctance motors
US6198239A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 15, 1998 |
| Grant date | Mar 6, 2001 |
| Priority date | — |
| Expiry date | Jun 15, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P25/089
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit and method for controlling a current level in a switched reluctance motor phase coil are provided. The circuit includes a current sensor for generating a current indicative signal indicative of a level of current in the phase coil and first and second comparators for comparing the current indicative signal to upper and lower hysteresis band limit signals. The circuit further includes a drive circuit, such as a flip-flop, for generating a drive signal responsive to the first and second comparators and first and second switches disposed on either side of the phase coil for providing current to the phase coil. The first switch is responsive to the drive signal and a phase control signal to maintain the current in the coil within the hysteresis band defined by the upper and lower hysteresis band limit signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.