ee341_h04_wi2012_Solution

ee341_h04_wi2012_Solution - ECE 341 Homework #4 Due: Fri....

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ECE 341 Homework #4 Due: Fri. 24 Feb. ‘12 Problem 1 : A three-phase eight-pole has a 24-slot stator. There are 30 turns of wire in each pair of slots. And all the 30 turns are connected in series. All coils in each phase are connected in series, and the three phases are connected in wye connection. The flux per pole in the machine is 0.060 Wb, and the speed of rotation of the magnetic field is 3600 r/min. (a) What is the frequency of the voltage produced in this winding? (2 pts.) Solution: The frequency of the voltage produced in this winding is 240 120 / 8 3600 120 P n f m e Hz (b) What are the resulting phase and terminal voltages of this stator? (2 pts.) Solution: There are 24 slots on this stator, with 30 turns of wire per slot. Since this is a eight-pole machine, there are four sets of coils associated with each phase. The voltage in the coils in one pair of slots is 1920 240 06 . 0 30 2 2 f N E C a V There are four sets of coils per phase, and they are connected in series, so the total phase
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ee341_h04_wi2012_Solution - ECE 341 Homework #4 Due: Fri....

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