Matsayin Siffofin Faktoringa Zabi (ZPFC)

Karakteristik Faktor Daya Nol (ZPFC) na generator yana nuna kurba wanda ya bayyana hankali a kan tasiri da ke faruwa a kan voltaje na terminal da kuma karamin mai shirya. A cikin wannan bincike, generator yana yi aiki a wasu tafin synchroni da karamin tasiri mai shirya da kuma faktor daya na nol. Karakteristik Faktor Daya Nol zai iya cewa ta fi sani da Potier Characteristic.

Don samun faktor daya na duk faduwar, alternator yana kasance da reactors ko synchronous motor mai shirya. Sakamakon ZPFC yana dace da Open Circuit Characteristic (O.C.C.).

Diagramma fasorar wanda yake da shawar da hankalin faktor daya na nol da kuma lagging yana ba da haka:

A diagramman fasorar da aka nuna, voltaje na terminal V yana zama fasorar da ake gano. Idan an samu faktor daya na nol da lagging, karamin mai shirya Ia yana lagga voltaje na terminal V da 90 digiri. Yadda ake koyar da Ia Ra (ida Ra shine karamin resistance na armature) yana koyar da karamin mai shirya Ia, kuma Ia XaL (XaL shine armature leakage reactance) yana koyar da karamin mai shirya Ia da kiyaye 90 digiri.

Eg shine voltaje mai shirya per phase.

Diagramma fasorar a ZPF lagging da Ra mai shirya da aka rage yana nuna haka:

Far yana nufin armature reaction magnetomotive force (MMF). Yana da hankali da karamin mai shirya Ia, idan haka suna canzawa da kuma yadda suka vary.

Ff yana nufin MMF na main field winding, wanda ake kira field MMF. Wannan shine magnetic - driving force da aka shirya a kan field winding na generator. Fr yana nufin resultant MMF, wanda yana da hankali da combined effect na armature reaction MMF da kuma field MMF a kan circuit magnetic na machine.

Field MMF Ff yana kula da subtracting armature reaction MMF Far daga resultant MMF Fr. Mathematically, wannan hankali yana nuna haka

Idan an samun da diagramma fasorar da aka nuna, voltaje na terminal V, voltage drop Ia XaL, da kuma voltaje mai shirya Eg suna da hankali. Saboda haka, voltaje na terminal V yana dace da arithmetic difference between generated voltage Eg and reactance voltage drop Ia XaL.

Ukuwar MMF phasor Ff, Fr da Far suna da hankali. Abubuwan da suka biro suna da hankali a cikin equation da aka nuna haka:

Duk abubuwan da aka bayyana a nan, equation (1) da equation (2), suna da muhimmanci don triangle Potier. Idan an divide both sides of equation (2) by Tf - inda Tf yana nufin effective number of turns per pole on the rotor field - equation yana iya transform into its equivalent form in terms of field current. Saboda haka,

Based on the above - derived equation, field current yana iya samun da summing up resultant current da armature reaction current.