ee212_5a - Click to edit Master subtitle style 9/26/10...

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Unformatted text preview: Click to edit Master subtitle style 9/26/10 EE212 Passive AC Circuits Lecture Notes 5a Three Phase Systems 11 9/26/10 Three Phase Systems 22 9/26/10 Ge ne rat ion: st e ady pow e r ( 1 - pow e r is fluct uat ing) m ore e fficie nt conve rsion of m e chanical pow e r t o e le ct rical pow e r ( 3 t im e s pow e r w it h addit ional arm at ure w indings and slight ly m ore t orque ) Tra nsm ission: M ore e fficie nt t ra nsm ission of pow e r ( st e a dy pow e r) le ss conduct ing m at e rial re quire d t o t ransm it pow e r ( de lt a t ra nsm ission no re t urn conduct or) 3 - t ransform e rs are m ore e fficie nt Bulk pow e r ge ne ra t ion and t ransm ission syst e m s are t hre e - phase ( 3 - ) syst e m s. Ge ne rat ion and t ransm ission of e le ct rical pow e r are m ore e fficie nt in 3 - syst e m s t ha n in 1 - syst e m s. Three Phase Systems 33 9/26/10 Instantaneous Power, p(t) = v(t) x i(t) v(t) = Vm sin t volts i(t) = Im sin( t-) amperes...
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ee212_5a - Click to edit Master subtitle style 9/26/10...

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