PHYS208 5/13 Class

Transformers and Power Distribution

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Transformers are essential for the economical distribution of ac electrical power. The ready transformation of ac from low voltage to high and back led to the wide acceptance of ac over dc for power distribution near the turn of the century. These pages from another course tell most of the story...

From SCEN103 pages:

Electrical Power Consumption Introduction to Transformers Electrical Power Distribution Slideshow of Circuit Overloading Review of Electrical Safety Electric Power Companies

A transformer is a device having a pair of windings, the primary side and the secondary side, which are flux-linked by a common core.

Transformation of Voltage:

Transformers may also be used to transform impedances; e.g. coupling the output of a stereo amplifier (R_out ~ 1 kohm) to a speaker of 4 or 8 ohm impedance for maximum power transfer. Refer to pg. 831 of HRW and 33-90P for impedance matching applications.

Transformation of Resistance:

Note: My comments about Edison vs. Tesla/Westinghouse regarding the "Battle of the Currents" were drawn primarily from the book "Edison, The Man Who Made The Future" by Ronald W. Clark (Putnam, 1977).

"http://www.physics.udel.edu/~watson/phys208/clas0513.html"
Last updated May 9, 1998.
Copyright George Watson, Univ. of Delaware, 1997.