Commutation of SR motors

Author

Becerra, Roger C. ; Ehsani, Mehrdad ; Miller, Timothy J E

Author_Institution

General Electric Co., Fort Wayne, IN, USA

Volume

8

Issue

3

fYear

1993

fDate

7/1/1993 12:00:00 AM

Firstpage

257

Lastpage

263

Abstract

Commutation schemes for most common types of switched reluctance (SR) motors are presented. Commutation can be achieved using two- or three-positions sensors and a simple commutation logic in a similar fashion to brushless electronically commutated motors. The commutation logic can be easily housed on a programmable logic array (PLA) or similar device. Two-quadrant operation, usually with two position sensors with variable phase shift and dwell angles, can be tuned up to achieve optimum efficiency at low cost. Four-quadrant operation with multimode commutation schemes, such as normal, boost, longdwell, and brake, which cover most of the SR drive applications, can be easily implemented with simple logic control and feedback from low-resolution position sensors. The speed range can be increased beyond the limit reachable with pulse-width modulation (PWM). A 100% increase in the speed range can be easily obtained by switching modes

Keywords

commutation; electric sensing devices; feedback; logic arrays; position measurement; reluctance motors; brushless electronically commutated motors; commutation logic; dwell angles; feedback; low-resolution position sensors; multimode commutation; position sensors; programmable logic array; switched reluctance motors; variable phase shift; Brushless DC motors; Commutation; Cost function; Feedback; Logic devices; Programmable logic arrays; Pulse width modulation; Reluctance motors; Space vector pulse width modulation; Strontium;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/63.233281

Filename

233281