Alternator size v.s. rpm rule of thumb
Alternator size v.s. rpm rule of thumb
(OP)
I've heard but lost track of a rule of thumb relating the ratio of stator size (?mass?) of an AC generator to the rpm of the rotor. Has anyone else come across this? If so, do you know if the rule relates only to iron or to windings etc total?






RE: Alternator size v.s. rpm rule of thumb
RE: Alternator size v.s. rpm rule of thumb
Of=(kva*10^50)/(RPM*D*l^2)
D=stator inside diameter (if I remember correctly in inches)
l=gross core length (if I remember correctly in inches)
Handbook of Electrical Engineers 10th edition
RE: Alternator size v.s. rpm rule of thumb
RE: Alternator size v.s. rpm rule of thumb
http://www.energy.qld.gov.au/electricity/infosite/glossary/glossaryofterms.htm
for more info
RE: Alternator size v.s. rpm rule of thumb
RE: Alternator size v.s. rpm rule of thumb
Donal G. Fink, John M. Carroll "Standard Handbook for Electrical Engineers, 10th Edition, McGraw-Hill Book Company, 1968,
page 6-5
equation 6-2
Output Factor = (kVA x 10**5)/(RPM x D**2 x L)
where
D is armature inside diameter
L is gross core length
RE: Alternator size v.s. rpm rule of thumb
Donal should read Donald
Additionally, Equation 6-2 can be elaborated to Equation 6-3 as:
Output Factor= (Bgf x kac/in)/8600
where:
Bgf is peak of fundamental component of air-gap flux density in lines per square inch
kac/in is rms effective armature kiloampere conductors per inch of armature periphery at inside diameter D.