# Lecture3 - 1 Acknowledgement – These handouts and lecture...

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Unformatted text preview: 1/29/2011 1 Acknowledgement – These handouts and lecture notes given in class are based on material from Prof. Philip Krein’s ECE 431 lecture notes. Disclaimer – These handouts only provide highlights and should not replace the class notes or course textbook. ECE 431 Electric Machinery Lecture 3 Review of Three-Phase Systems (2) 1 Copyright ©2011 Ali M. Bazzi. All rights reserved 1/29/2011 Recap • Two main configurations: Wye and Delta. • Single phase: • Three phase: • Three-phase complex power: • For a given load Z , 2 Copyright ©2011 Ali M. Bazzi. All rights reserved 1/29/2011 * 1 S V I ϕ = * 3 3 S V I ϕ = 3 | | 3 | || | 3| || | ll l S V I V I ϕ ϕ ϕ = = 3 . S Z ϕ ∠ = ∠ 1/29/2011 2 Recap • Y-Connection: • Δ-Connection: 3 Copyright ©2011 Ali M. Bazzi. All rights reserved 1/29/2011 | | 3 | | ll l V V I I ϕ ϕ = = 30 o ab an V V ∠ = ∠ + | | 3 | | ll l V V I I ϕ ϕ = = , , 30 o a l a I I ϕ ∠ = ∠ − Recap...
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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.

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Lecture3 - 1 Acknowledgement – These handouts and lecture...

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