Representation of nonlinear characteristics by linear elements

THE solution of the modern complicated electrical engineering problems needs simpler methods than dealing with a large number of equations in a large number of unknowns; simpler experimental solutions are introduced in the form of simple equivalent circuits or a collection of such circuits with variable constants (to represent more than one case) and measuring instruments in a suitably designed machine called analogue computer. Hence the importance of facilitating the solution of nonlinear characteristics of magnetic circuits, neglecting hysteresis, by the steady-state response of linear elements and using the ordinary measuring instruments (ammeter and voltmeter) is clear.