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 peaktopeak 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 6668 of the lecture notes. Consider the case of a duty cycle of 0.5. Plot the torquespeed 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 0150 rad/s....
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 Spring '08
 Staff
 Transistor, Volt, Average Power, Electric motor, Switchedmode power supply, Buck converter

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