This paper deals with the full-order flux observers for speed-sensorless induction motor drives. An unstable region encountered in the regenerating mode at low speeds is well known. To remedy the problem, a modified speed-adaptation law is proposed. Instead of using only the current estimation error perpendicular to the estimated flux, the parallel component is also exploited in the regenerating mode. Using steady-state analysis, a linearized model, simulations, and experiments, it is shown that the proposed adaptation law removes the unstable region.
|Title of host publication||IEEE International Electric Machines and Drives Conference (IEMDC'03)|
|Place of Publication||Madison, WI, USA|
|Publication status||Published - 1 Jun 2003|
|MoE publication type||A4 Article in a conference publication|
- induction motors, full-order flux observer,
- sensorless, generating mode