A Simple Effective Current Regulator for Airport Lighting

Feedback regulators are well known for maintaining given parameters such as current, voltage, speed, torque, etc. Frequently the controlled variable is converted by a transducer to a direct voltage which is compared to a reference potential. This simple technique becomes difficult and/ or expensive in designing an alternating current regulator. The use of a magnetic amplifier to control the output results in a waveform of varying form factor. Thus, maintaining its average value does not result in a constant effective value.