Switched Reluctance Motor Control

Background :

The Switched Reluctance (SR) motors are basically AC machines with an iron core rotor. They offer several advantages such as: reduced maintenance, low cost, high reliability through simple design and construction, increased capability to withstand high temperature environments and their ability to increase torque production through electromagnetic gearing. While the SR motor complicates the control problem by coupling multi-input nonlinear dynamics into the overall electromechanical system dynamics, it is possible to develop an accurate dynamic model. However, the SR motors demand a sophisticated commutation strategy. Since the SR motors are often utilized in applications requiring high torques, the motor is operated "high" on the saturation curve. Therefore the saturation effects must be included in the SR motor model,

Video (.mov) of the SRM in operation (500KB)

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The Switched Reluctance Motor

The SRM with the Load

Research Work :

The following controllers were implemented using the mechatronic workstation.

  • Exact Model Knowledge Position Tracking Control
    • Feedforward, full-state feedback with novel commutation strategy.
    • Feedforward, partial-state feedback control.
  • Adaptive Control for a general class of SR Motors
    • Full-state feedback control with online parameter estimation.
    • Partial-state feedback control with online parameter estimation.
    • Full-state feedback control which compensates for parametric uncertainty as well as saturation in the flux linkage.
  • Robust Position Tracking Control
    • Feedforward control with high-gain feedback to compensate for parameter uncertainty.

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