The figure of merit of magnetic amplifiers

REGULATING systems are a combination of devices whereby a large amount of energy is controlled by a small amount of energy. Large amounts of heat can be controlled by a small amount of thermal energy in a thermocouple. A feeble voltage can regulate the speed of a tandem mill; a tiny magnet governs the voltage of a large alternator; and a microwatt radar signal can guide a missile at supersonic speeds. It follows that power amplifiers play a major role in regulating systems; therefore, some of the principle characteristics of proportional power amplifiers will be examined.