Design of Rotating Electrical Machines, 2nd Edition

Abbreviations and Symbols

A	linear current density, [A/m]
A	magnetic vector potential, [Vs/m]
A	magnetic vector potential scalar value, [Vs/m]
A	temperature class 105 °C
AC	alternating current
AM	asynchronous machine
A1-A2	armature winding of a DC machine
A1n, A2n, A3n	factors for defining permanent magnet flux density
a	number of parallel paths in windings without commutator: per phase, in windings with a commutator: per half armature, diffusivity
B	magnetic flux density, vector [Vs/m2], [T]
B	magnetic flux density scalar value, [Vs/m2]
Br	remanent flux density, [T]
Bsat	saturation flux density, [T]
B	temperature class 130 °C
B1-B2	commutating pole winding of a DC machine
b	width, [m]
b0c	conductor width [m]
bc	conductor width [m]
bd	tooth width, [m]
bdr	rotor tooth width, [m]
bds	stator tooth width, [m]
br	rotor slot width, [m]
bs	stator slot width, [m]
b0	slot opening, [m]
bv	width of ventilation duct, [m]
C	capacitance, [F], machine constant, integration constant, fabrication cost, [€]
C	temperature class >180 °C
C1-C2	compensating winding of a DC machine
Cf	friction coefficient
CM	torque coefficient
Cs	saving cost per year, [€/a]
c	specific heat capacity, [J/kgK], capacitance per unit of length, factor, divider, constant
Cdiff	increase of the purchase cost, [€]
ce	energy cost, [€/kWh]
cp	specific heat capacity of air in constant pressure
Cpw	cost per one kilowatt of loss over the life of motor, [€/kW] ...