Robust low-cost implementation of vector control for reluctance synchronous machines

The paper presents an implementation of a low-cost robust digital-analogue (hybrid) speed (and position) vector controller for cageless-rotor reluctance synchronous motors. Separate control of i/sub d/ and i/sub s/ is performed with i/sub d/* (reference value) constant up to the base speed and reducing gradually above the base speed. On the other hand, i/sub q/* (reference value) is set by a sliding-mode analogue speed (and position) controller for which a simplified design methodology is presented. A 6-pole experimental reluctance synchronous motor with an axially laminated anisotropic cageless rotor is introduced with its inductances L/sub d/, L/sub q/ and torque measured through standstill tests. Digital simulation and test results for position and speed vector control are presented.<>