Control method for switched reluctance motor
US6788021B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2002 |
| Grant date | Sep 7, 2004 |
| Priority date | — |
| Expiry date | Mar 29, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A control algorithm provides automatic control of the turn-on angle used to excite the switched-reluctance motor (SRM). The control algorithm determines the turn-on angle that supports the most efficient operation of the motor drive system, and consists of two pieces. The first piece of the control technique monitors the position of the first peak of the phase current (&thgr;p) and seeks to align this position with the angle where the inductance begins to increase (&thgr;m). The second piece of the controller monitors the peak phase current and advances the turn-on angle if the commanded reference current cannot be produced by the controller. The first piece of the controller tends to be active below base speed of the SRM, where phase currents can be built easily by the inverter and &thgr;p is relatively independent of &thgr;m. The second piece of the controller tends to be active above base speed, where the peak of the phase currents tends to naturally occur at &thgr;m, regardless of the current amplitude. The two pieces of the controller naturally exchange responsibility as a result of a change in command or operating point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.