Abstract: A three phase compact high short circuit current reactor also commonly known as an inductor is disclosed which can be easily be modified during initial construction to provide predefined gaps between the internal core sections for enhancing performance for each individual customized application. Inductor core sections are commonly oriented horizontally. The present design provides a core construction which includes multiple vertically stacked coils with yokes positioned between adjacent coils for facilitating flux cancellation to enhance performance. The coils can be round or square in cross-section and normally are made of either wire or foil usually of copper or aluminum. The material of the core is preferably of a silicon steel material which can be grain-oriented or non-grain-oriented.

Abstract: An electrically variable current limiting reactor which is usable in association with a power supply for an electrostatic precipitator is disclosed herein. The current limiting reactor is capable of having the inductance value thereof varied responsive to system operation conditions. Most particularly the inductance of the current limiting reactor can be modified responsive to the form factor of the sinusoidal AC input current to the power supply transformer. Additionally the inductance of the current limiting reactor can be controlled responsive to the fractional conduction of the full wave rectified current waveform at the output of the full wave rectifier of the power supply. Other conditions can be monitored to control the inductance value of the current limiting reactor such as physical system parameters. An automatic operating control may modify the inductance of the current limiting reactor responsive to the current entering the primary of the transformer of the power supply.