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Unformatted text preview: Assuming that the current into the machine varies linearly, what is the true input power into the machine. What is the input power if we approximate it by a a v i . Problem 3 Current Ripple Consider problem 1. Suppose it is desired that the peak-to-peak torque ripple is 10% of the average torque. Assuming that 2 . = aa L mH, what should the switching frequency be? Problem 4 Combined Performance Consider the example on page 66-68 of the lecture notes. Consider the case of a duty cycle of 0.5. Plot the torque-speed curve on one figure. Superimpose plots of the average power into the converter, the average power into the motor, and the average mechanical power in another figure. Consider speeds from 0-150 rad/s....
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This note was uploaded on 04/08/2012 for the course ECE 321 taught by Professor Staff during the Spring '08 term at Purdue University-West Lafayette.
- Spring '08