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Unformatted text preview: Dynamic simulation of an elevator driven by separately excited DC motor by means of a gear 1. Scheme of the elevator system (a) (b) Motor Load Gear R M. - M r r L M. T T F v L L L L M. M. 1 2 elevator pulley R M. M. 2 1 pulley elevator cabin M1 mass of the counterweight, M2- mass of the cabin, T M = T em electromagnetic torque developed by the motor, M = speed of the rotor, T L load torque on pulley side, L speed of the pulley, R pulley radius, v cabin speed, r L /r M gear ratio. Equations: 1. Motor equations:- Voltage equation of the motor armature circuit: a a a a a a di v e R i L dt = + + , where a M e K =- Electromagnetic torque equation: em a T K I =- Motion equation of mechanical system seen from the motor side ( ) M M em M M M L M d T T J B T dt = = + + , if B M = 0, ( ) M M M L M d T J T dt = + where T L(M) load seen from the motor side....
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- Fall '06