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Unformatted text preview: 2 . The torque constant K T =1 N•m/A. (a) If a constant torque is required up to 1,000 rpm, determine the rotor voltage increase needed to increase the speed from 0 to 1,000 rpm. (b) If the speed needs to be further increased from 1,000 rpm to 1,500 rpm using the field control, how much should the stator field flux (or current) be reduced in percentile compared with the flux at 1,000 rpm while maintaining the rotor voltage and current at maximum. (c) If the machining process generates and applies a constant torque of 5 N-m to the table, what is the maximum acceleration attainable from this motor-table when the effect of damping is neglected? 3. A three phase induction motor has one pole pair per phase. The equivalent resistance and leakage inductance in the rotor winding are 10 Ω and 0.06 H, respectively. The motor is supplied with 220 V in each phase at 60Hz. Compute the torque-speed relationship and generate a plot....
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This document was uploaded on 12/28/2011.
- Fall '09
- Moment Of Inertia