Ampere-turn gain of ordinary saturable reactors

THE ampere-turn gain is a fundamental quantity of ordinary saturable reactors. In the case of an ideal core material with a step-shape B-H characteristic (rectangular B-H line), the relation between load-winding ampere-turns I L N L and control-winding ampere-turns I C N C becomes a straight line, which for identical scales of ampere-turns subtends an angle of 45 degrees with the axes. Thus, in the idealized case, the ampere-turn gain represented by the slope of the control characteristic, I L N L = f(I C M C ), is K AT = (I L N L )/(I C N C ) = 1.