Hadla, HazemCruz, SérgioOliveira, ÁlvaroCavaleiro, DiogoBranco, Ricardo2020-01-282020-01-282015-03-153978-1-4799-7800-7http://hdl.handle.net/10400.19/6154This paper presents an encoderless high-performance synchronous reluctance motor drive for traction applications. The control system is based on the active flux concept and a hybrid rotor position estimation algorithm is used, being this algorithm based on the injection of high-frequency signals at low speeds and on the position of the active flux vector for medium and high-speeds. A smooth transition algorithm between the two rotor position estimation methods is provided. Moreover, in order to improve the efficiency of the overall drive system, a loss minimization algorithm is proposed in order to reduce the motor copper losses when operating in steady-state. Experimental results obtained in the laboratory confirm the validity and adequacy of the proposed algorithms for the developed drive system.engHigh frequency signal injectionHybrid sensorless controlSynchronous reluctance motorLoss minimizationActive fluxCross-magnetic saturationjournal article10.1109/ICIT.2015.7125398