Prediction of rotor position in switched reluctance motor drives at standstill and unexcited rotating shaft conditions

Author

Umamaheshwar Krishnamurthy

Abstract

"Over the years, Switched Reluctance Machine (SRM) drives have proven themselves to be a solution for extreme working environments. These include applications in the automotive, military, aerospace and domestic sector. The robustness of this machine can be attributed to its simple geometry and absence of any magnetic source on the rotor. For the proper start-up and precise control of the SRM drive, an accurate detection of rotor position is necessary. Conventional approach using an external position sensor mounted on the shaft has numerous drawbacks. This provides the necessary incentive to develop a sensorless technique that is accurate, cost-effective, reliable, and does not unnecessarily increase the size to the existing system.

The SRM has an inductance profile symmetric about each phase which is a function of position and current. This profile can be divided into regions having a unique order such that one of the phases in each region varies linearly as the position for a fixed value of current. An accurate knowledge of the value of inductance for this phase would allow us to precisely calculate the rotor position. Based on this fact, a method has been presented which conforms to all requirements and is effective at standstill as well as flying shaft conditions"--Abstract, page iii.

Advisor(s)

Fahimi, Babak

Committee Member(s)

Pekarek, Steven
Crow, Mariesa

Department(s)

Electrical and Computer Engineering

Degree Name

M.S. in Electrical Engineering

Publisher

University of Missouri--Rolla

Publication Date

Spring 2004

Pagination

x, 58 pages

Note about bibliography

Includes bibliographical references (pages 55-57).

Rights

© 2004 Umamaheshwar Krishnamurthy, All rights reserved.

Document Type

Thesis - Restricted Access

File Type

text

Language

English

Subject Headings

Reluctance motors

Thesis Number

T 8480

Print OCLC #

56473519

Recommended Citation

Krishnamurthy, Umamaheshwar, "Prediction of rotor position in switched reluctance motor drives at standstill and unexcited rotating shaft conditions" (2004). Masters Theses. 2493.
https://scholarsmine.mst.edu/masters_theses/2493