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In recent years, with the environmental consciousness enhanced, the development of electric vehicles is gradually taken seriously. However, the traveling range of the electric vehicles can not compete with the ability of the existing internal combustion engine vehicles, which is one of the most important factors of hindering the development of electric vehicle. Therefore, the regenerative braking...
We have proposed a current observer-based speed sensorless vector control system taking into account both iron loss and stator resistance identification. The method is constructed in a synchronously rotating reference frame. The effectiveness of the proposed system has been investigated by digital simulation and experimentation. Furthermore important control parameters such as stator resistance, observer...
This paper presents a novel V/f controlled induction motor for improvement of speed characteristics. The proposed method is an auto-boost voltage method to compensate the voltage drop of stator impedance and a slip frequency compensation method to decrease the speed error caused by the change of load. The operating region of proposed method is discussed by using vector locus. The stability of the...
The V/f control method is one of speed control methods for induction motors. We have proposed an auto-boost voltage method to compensate the voltage drop of stator impedance and a slip frequency compensation method to decrease the speed error caused by the change of load. Stability of the proposed V/f control system is analyzed by root locus. Steady-state torque-speed characteristics and transient...
This paper presents a new sensorless vector control system for general-purpose induction motors by taking into account iron loss, in which a current-observer-based method and the model reference adaptive system (MRAS) theory are applied. Since the current observer is constructed in a synchronously rotating reference frame with respect to the current model and the parallel exiting circuit of iron loss...
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