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Unformatted text preview: Starting with the motor and flywheel at 0 speed, how long will it take to bring the flywheel up to rated speed assuming negligible friction? Ans. 307.6 sec 3. A certain system has a controller: 8 1 ) ( + = s s D c a) Assume the sampling rate T is 10% of the controller time constant. Find approximate expressions for D c [z] for a digital realization of the controller using: Tustin’s method Ans. 152 168 1-+ z z Euler’s method Ans. 72 80 1-z b) Find a difference equation relating controller output to controller input for the D c [z] you found using Tustin’s method. Ans. ] 1 [ ] [ 168 1 ] 1 [ 168 152 ] [-+ +-= k e k e k u k u...
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- Spring '10
- Moment Of Inertia, Electric motor, Uninterruptible power supply, Brushless DC electric motor