SYMBOLS USED IN ALTERNATOR DESIGN. 
In this Book on The Design of Alternating Generators and 
Synchronous Motors, the symbols here given are used in 
the following significations. It must be remembered, that 
the symbols and their respective significations are not 
standard, but have met with general approval and ac- 
ceptance. 
A, = Field ampere turns. 
Bas = Field ampere turns corresponding to the normal arma- 
ture back ampere turns on short circuit. 
A, Normal armature back ampere turns. 
a Pole are. 
Ba Magnetic density in armature core. 
B, - Magnetic density in pole core. 
B 
\“agnetie density in teeth. 
..rmature phase current. 
J ine current. 
Cc Current in the field winding. 
Cp Phase current. 
= Pole shoe height. | 
= Jnaternal diameter of the armature. 
= External diameter of the magnet wheel. 
= External diameter of the armature. 
= Pole core height. 
= Value of air gap. 
x = Magnetie density in wheel rim. 
o 
Line voltage. 
E. M. F. on the armature phase winding. 
Phase voltage. . 
2 Nel I ee 
PROPERTY OF ELECTRICAL LABORATORY, 
} 
FACULTY OF APPLIEO SCIENCE. 
