The research of stator current oriented method of switched reluctance motor

Abstract

This paper presents a novel control method of switched reluctance motor (SRM) along with stator current oriented method. This method will minimize the torque ripple while reducing the step angle. By analyzing the current of SRM in terms of torque and rotor position, a current distribution function can be acquired. Then a nonlinear magnetizing model is used to detect rotor position. The current distribution function will decide the given current of corresponding stator winding with the current position information by the nonlinear magnetizing model and the expected position information. By this method, the SRM will be stabled at expected position with expected torque. It has been experimentally verified that this method can effectively reduce the torque ripple and improve the position precision of the servo control system.

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

“…Note that the torque sign is only determined by the variation of the inductance that is, T j > 0 if and only if K j > 0 and K j = 0 implies that no torque is produced 'through' the phase j -see Equation (5). Then, using ideas reported in [14] and [10] we introduce the following smooth current-switching policy.…”

“…There exist a large number of efficient heuristically-based and experimentally-validated control approaches to reduce the number of mechanical sensors in the loop -see e.g., [1], [2], [3], [4], [5], [6], [7], [8]. However, to the best of the authors knowledge, articles on control of switched-reluctance drives that include a rigorous stability analysis, especially in a sensorless context, are rare.…”

Robust adaptive control of switched-reluctance motors without velocity measurements

“…We consider a three-phase electric motor that is, m = 3. The control goal is to design a dynamic controller for (2) whose output u = [u 1 u 2 u 3 ] ⊤ depending on the stator currents and rotor angular positions, such that ω(t) tracks bounded smooth reference trajectories ω * . We make the standing assumption that τ L and J are both unknown and J ∈ [J m , J M ] with known limits J m and J M .…”

“…There exist a large number of efficient heuristically-based and experimentally-validated control approaches to reduce the number of mechanical sensors in the loop -see e.g., [1], [2], [3], [4], [5]. However, articles on control of switchedreluctance drives that include a rigorous stability analysis, especially in a sensorless context, are rare.…”

Speed-sensorless control of switched-reluctance motors with uncertain payload

“…On the other hand, a proportional-derivativebased controller is proposed in [1] but relying on the knowledge of the torque load. Relatively efficient but "solely" experimentally-validated approaches have been proposed in [6], [7], [8], [9], [10], to mention only a few. Indeed, these controllers constitute ad-hoc engineered solutions to the sensorless problem and none of these articles includes a study of stability.…”