N

Nyquist criterion The Nyquist criterion is a frequency domain tool which is used in the study of stability. … Read More

O

Open-Loop Control System An open loop system is characterized by the fact that the input signed is processed … Read More

P

Permeability Permeability is the measure of the ease, with which magnetic lines of force pass through a given … Read More

R

Reluctance  The opposition that a magnetic circuit presents to the passage of magnetic lines through it. Reactance The … Read More

S

SI unit SI units are most widely used units of measurement belong to an international system of units … Read More

T

Time Invariance  In time invariant system, there are no changes in system structure as a function of a … Read More

U

Under-excited The operating condition of a synchronous machine absorbing reactive power.      

V

VFD Variable Frequency Drive – a technology where the rotational speed of an electric motor is controlled or … Read More