Title page for ETD etd-05072010-112351

Type of Document Master's Thesis
Author Merrifield, David Bruce
URN etd-05072010-112351
Degree Master of Science
Department Electrical and Computer Engineering
Advisory Committee
Advisor Name Title
Ramu, Krishnan Committee Chair
Baumann, William T. Committee Member
Lindner, Douglas K. Committee Member
  • SRM
  • Average Torque Control
  • Speed Control
  • Current Control
  • Permanent Magnet Switched Reluctance Motor
  • Firing Angle Selection Efficiency Based Control
Date of Defense 2010-05-04
Availability unrestricted
The permanent magnet switched reluctance motor (PMSRM) is hybrid dc motor which has the potential to be more effect than the switched reluctance (SRM) and permanent magnet (PM) motors. The PMSRM has a both a salient rotor and stator with permanent magnets placed directly onto the face of common pole stators. The PMSRM is wound like the SRM and can be controlled by the same family of converters. The addition of permanent magnets creates nonlinearities in both the governing electrical and mechanical equations which differentiate the PMSRM from all other classes of electric motors.

The primary goal of this thesis is to develop a cohesive and comprehensive control strategy for the PMSRM so as to demonstrate its operation and highlight its efficiency. The control of the PMSRM starts with understanding its region of operation and the underlying torque production of the motor. The selection of operating region is followed by a both linear and nonlinear electrical modeling of the motor and the design of current controllers for the PMSRM. The electromechanical model of the motor is dynamically simulated with the addition of a closed loop speed controller. The speed controller is extended to add an efficiency searching algorithm which finds the operating condition with the highest efficiency online.

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