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By M. Ahmad

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Experimental result of AFS by reaction torque control based on idealized model with SBW. 24 Advances in Motor Torque Control The experimental results for this control are shown in Fig. 15. The graph of the angle shows that the front axle wheel angle returned to 30°, and the steering wheel angle was maintained constant angle at 90°. On the other hand, the steering torque shows that the driver constantly received a reaction torque. This control method did not cause any steering interference because no AFS-modified reaction torque was transmitted by the control from the road surface to the driver.

C. P. (1999). Accionamentos Electromecânicos de Velocidade Variável, Fundação Calouste Gulbenkian, ISBN 972-31-0839-9, Lisboa, Portugal. S. Energy Information Administration. 2010). html> World Energy Council. 2009). asp> Xu, X. & Novotny, D. W. (1991). Implementation of Direct Stator Flux Orientation Control on a Versatile DSP Based System. 694-700, ISSN 0093-9994. ; Ermis, M. & Barlak, C. (2001). Soft-Starting of Large Induction Motors at Constant Current with Minimized Starting Torque Pulsations.

Figure 4 illustrates the motor starting using the voltage-ramp technique with a load which has a quadratic torque curve (TC). As can be verified, for each interval of 10% of synchronous motor speed, 10% of rated motor voltage is added. Still, the variation of electromagnetic torque (Te) and motor current (I) due to the variation of stator voltage can be clearly seen. Using this type of ramp-voltage technique, the electromagnetic torque produced by the motor is always quadratic (Palma, 1999). On the other hand, the current control technique controls the current at a constant value and one that is appropriate for the requirements for starting, solving the problem of the high inrush current transient inherent in induction motors with direct starting.

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