exam2 - EE321 Exam 2 Spring 2009 Notes: Write your name and...

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EE321 Exam 2 Spring 2009 Notes : Write your name and ID on blue book. This part of exam will be recycled. You must show work for credit, except for problem 1. A score of 60% on this exam satisfies ABEST objectives 1,2,4, and 5. Good luck !
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The following questions should be answered true or false. They are worth 2 pts. each. You do not need to show work. 1a) 3 , cr N describes the number of turns around slot 3 of the c-phase of the rotor. 1b) The number of poles can be found from the winding function 1c) A pm dc machine cannot be connected directly to an ac source and expected to operate 1d) A series connected dc machine cannot be connected directly to an ac source and expected to operate 1e) DC machines would be a poor choice for use in a petroleum plant 1f) Conduction losses limit switching frequency 1g) A two-quadrant converter eliminates discontinuous mode 1h) A pm dc machine has a smaller operating range in terms of capability curve than a separately excited machine with the same maximum torque capability. 1i) Multistack variable reluctance stepper motors have significant mutual inductance
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This note was uploaded on 10/07/2010 for the course ECE 321 taught by Professor Staff during the Spring '08 term at Purdue University-West Lafayette.

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exam2 - EE321 Exam 2 Spring 2009 Notes: Write your name and...

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