Mangoldt PolyGap cores are constructed using many tiny air gaps as opposed to cores with a single or only a few air gaps. The use of many tiny air gaps (PolyGap) virtually eliminates stray magnetic fields emanating from the air gaps that cause circulating currents in the coil windings. PolyGap reduces heat losses and audible noise associated with harmonics. Mangoldt line/load reactors are constructed using PolyGap core technology except where small reactor size is a limiting factor.
Reactors with PolyGap construction offer Inductance that is balanced in all three phases. With a tolerance of -/+ 3% of the reactor rated inductance in all three phases. Consistent filtering is achieved in all three phases and equivalent voltage drops in all three phases helps to keep motor voltages balanced for best performance.
Additionally, it tends to make our reactors lower in power losses and audible noise than traditional reactors produced by others in the marketplace. The PolyGap core also allows Mangoldt reactors to be line and load using the same part number. Competitors usually have two different part numbers to accommodate line and load reactors. The PolyGap design provides higher inductance at high current levels.