Exponential Stabilization of Switched-Reluctance Motors Via Speed-Sensorless Feedback

We solve the control problem of switched-reluctance motors without velocity measurements. Our controller is composed of a loop in the mechanical dynamics which consists of a PI²D controller and a tracking controller closing an inner loop with the stator currents dynamics. The PI²D controller consists of a linear proportional derivative controller in which the measurement of velocities is replaced by approximate derivatives of angular position. Then a double integrator is added, composed of an integral of the angular position errors and a second integral correction term in function of the approximate derivative. We show global exponential stability and illustrate the performance of our controller in numerical simulations.