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Unformatted text preview: a) Given that only one winding is used at a time, what sequence of currents (polarity and phase) should be imposed for counterclockwise rotation? b) If the currents are switched sequentially each 1 ms, how fast will the motor rotate, assuming the inductance is small (i.e. the time constant is small and the machine response is instantaneous)? c) It is proposed instead that two windings be used at a time. What sequence should be used for counterclockwise rotation in this case? 3. Bonus: Textbook problem 3.22. The air gap lengths are not equal as stated in the textbook. Assume they are g o and g 1 (+2 points)....
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This note was uploaded on 08/25/2011 for the course ECE 431 taught by Professor Bazzi during the Spring '11 term at University of Illinois at Urbana–Champaign.
 Spring '11
 Bazzi

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