lecture 34

# lecture 34 - Class as usual 11/15 11/17 and 11/19(M W and F...

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1 1 Class as usual, 11/15, 11/17 and 11/19, (M, W and F) No class on 11/22 (Monday before Thanksgiving) HW #11 is due 11/15/2010 (Monday) Test #3 Nov. 18, 2010, Thursday, 6:30 - 7:30 PM, PHYS 112 No calculator, no electronic device and no formula sheet Tables 12.1 and 12.2 will be handed out with the test. Material covered: Up to and include Lecture 36 (Wednesday’s lecture) Ch. 16, 17 and 19, HW # 8, 9, 10 and 11 A seating chart will be posted in 202 Help Room (MSEE 180) and on my office door (MSEE 262) by 11/18/2010 noon. You have to sit in the assigned seat. Pictures will be taken during the test. Bring PU ID or Photo ID 8 to 12 MC questions and 1 to 2 WO questions. Turn in the scantron sheet and the test packet. Summary of Lecture #34 11/12/2010 VI characteristic of coupled coils More examples M 12 = M 21 = M from energy consideration M 2 L 1 L 2 from energy consideration Coupljng coefficient k Equivalent T and Π circuits 2 VI chara. of an isolated inductor with i(0 - ) = 0 VI characteristic of coupled coils in time domain, with i 1 (t) and i 2 (t) going into dotted terminals VI characteristic of coupled coils in s domain, assuming i 1 (0 - ) = i 2 (0 - ) = 0 dt di L dt di M ) t ( v dt di M dt di L ) t ( v 2 2 1 21 2 2 12 1 1 1 + = + = ) s ( I s L ) s ( I s M ) s ( V ) s ( I s M ) s ( I s L ) s ( V 2 2 1 21 2 2 12 1 1 1 + = + = di(t) v(t) L , V(s) LsI(s) dt = = + _ v(t) i(t) L L 1 , L 2 : Self inductance M 12 = M 21 = M Mutual inductance If one of currents goes into a dotted terminal and the other current goes into the undotted terminal, then In time domain

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lecture 34 - Class as usual 11/15 11/17 and 11/19(M W and F...

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