This study presents an energy efficient and speed-sensorless control scheme for electric vehicle induction motors (IMs). The IM drive is designed to feature characteristics such as fast dynamic response, high efficiency and low cost. Hybrid field orientation control (FOC) and direct torque control (DTC) is employed as the main control method of IM drive. This method enjoys the advantages of both FOC and DTC and eliminates certain disadvantages. A field weakening algorithm is developed and utilised within the control strategy to ensure robust operation at high speeds. The cost is lowered by eliminating the speed encoder and estimating the speed using an extended Kalman filter observer. Furthermore, a loss minimisation algorithm is associated with the main control strategy to ensure high IM drive efficiency. The effectiveness of the proposed method is verified through simulation and experimental results.
Efficiency improved sensorless control scheme for electric vehicle induction motors
IET Electrical Systems in Transportation ; 4 , 4 ; 122-131
2014-12-01
10 pages
Article (Journal)
Electronic Resource
English
sensorless machine control , angular velocity control , IM drive , speed estimation , DTC , electric vehicle induction motor , hybrid field orientation control , loss minimisation algorithm , electric vehicles , Kalman filters , direct torque control , speed encoder elimination , FOC , induction motor drives , field weakening algorithm , extended Kalman filter observer , machine vector control , speed sensorless control scheme , torque control
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