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This paper will introduce an inset-type axial-gap self-bearing motor (AGBM), which is an electrical combination of an axial thrust-bearing and an axial flux motor. A method for controlling the axial position and the rotating speed of the AGBM without the influence of reluctance torque is also discussed. First, the axial force and the motoring torque are analyzed theoretically, and then, the control...
This paper presents system analysis, modeling and simulation of an electric vehicle with different sensorless control techniques. Indeed, sensorless control is considered to be a lower cost alternative than the position or speed encoder-based control of induction motors for an electric vehicle. Two popular sensorless control methods, namely, the Luenberger observer and the Kalman filter methods are...
Switched reluctance motors (SRM) have an intrinsic simplicity and low cost that make it well suited to many applications. SRM as a power drive device, however, is designed mainly to realize speed control and high efficiency; the big step angle and the torque ripple have influenced its position precision and have limited its applications in position control system, which demands low speed and low torque...
This paper describes various methods aimed at tracking the flux and rotor position for cage induction machines without a shaft sensor using specially designed saliencies or natural saliencies. The estimation methods employ a high frequency (HF) signal or test vectors to detect the machine saliency. As is common knowledge, multiple saliencies can cause problems to track only one particular saliency...
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