Answer / iamdon

TWO REACTION THEORY is employed for the analysis of salient
pole rotor synchronous machines.

Blondel is credited for the theory.

Yes,Same theory can be used for the analysis for
cylindrical rotor synchronous machines also.Actually
salient pole rotor is a general case where as cylindrical pole
rotor is special case.

In case of salient pole, the air gap is not same with respect
of time.So rotating field faces different reluctances.The gap
is minimum in polar region and is maximum in interpolar region.
By Two reaction theory we break the rotating field along two
axes namely
1)Direct axis and
2)Quadrature axis.
The advantage of the breaking is that the air gap became fixed
(so the reluctance) along both axis seperately with respect of
time.So analysis become quite simpler.

Author:arbelectbit@yahoo.com

bit confused - am i correct in thinking that to determine line to line voltage in a star config 110v 3 phase 4 wire distribution system i would use a voltmeter? I have a circuit configured as an unbalanced load, consisting of three incandescent lamps (1x40w, 1x60w, 1x100w - all 110v rated)connected in a star configuration to a 110v 3 phase 4 wire distribution system. I want to find out what types of meters i would use to obtain: a) each line to line voltage b) the line to neutral voltage across each load c) current flowing in each line and load d) current flowing in the neutral conductor e) power supplied to the loads im assuming i would be using ammeters in series along each line and voltmeters in parallel across each line to neutral? Also how could i predict these meter readings before taking them and with which formulae? Any help would be greatly appreciated A.

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