TECHICAL Series MATHEMATICS • INFORMATICS • PHYSICS Series PHILOLOGY Series ECONOMIC SCIENCES Sereies EDUCATIONAL SCIENCES Series LAW AND SOCIAL SCIENCES Series
Influence of Supply Voltage on the Internal Angle and Reactive Power at a Synchronous Motor from an Electric Drive
(Influenţa tensiunii de alimentare asupra unghiului intern şi a puterii reactive la un motor sincron dintr-o acţionare electrică)
Vol LXII • No. 4B/2010
Cornel Ianache*, Boris Siro*, Stefania Iordache**
*Universitatea Petrol - Gaze din Ploieşti, Bd. Bucureşti 39, Ploieşti
e-mail: cornelianache@yahoo.com , bsiro@upg-ploiesti.ro
**Universitatea Valahia din Târgovişte
e-mail: stefania.iordache@yahoo.com

 Keywords   voltage, synchronous motor, electric drives.

 Abstract
There are practical cases in which some synchronous motor drives are faced with situations in which the supply voltage can be higher / lower than the nominal supply voltage, but without pronounced fluctuations or relatively slow fluctuations in time. The paper examines the influence of this situation on the internal angle of the machine and on reactive power produced by it. Conclusions obtained are more important having in view that this kind of drives, regularly, have high power and sometimes very high power.

 Rezumat
Sunt cazuri practice în care unele acţionări cu motoare sincrone se confruntă cu situaţii în care tensiunea de alimentare poate fi mai mare/mai mică decât tensiunea de alimentare nominală, dar fără fluctuaţii pronunţate sau cu fluctuaţii relativ lente în timp. Lucrarea analizează influenţa acestei situaţii asupra unghiului intern al maşinii si puterii reactive debitate de aceasta. Concluziile obţinute sunt cu atât mai importante cu cât asemenea sisteme de acţionare electrică sunt, în general, de puteri mari, iar uneori chiar de puteri foarte mari.



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