Abb Oy

Abb Inc.

Alpo K Vallinmäki

Kalyan P Gokhale

Douglas W Karraker

Nicklas Jan Anders Sodo

Dennis Tyczkowski

Non-linear inductor(s) are used to reduce the percent total harmonic distortion of the harmonics in the line currents in the input side rectifier system of an ac drive system. Several constructions for the non-linear inductor(s) are described. The non-linear inductor(s) may be constructed from E and I laminations. The gap depends on the construction of the middle leg of the E laminations and may have a step with a constant spacing or a variable spacing which depends on the stacking of the laminations. Alternatively the non-linear inductor(s) may be constructed from a toriodal core that either has a step gap or a variable type gap.

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Mukwonago, WI, United States of America

Alpo K Vallinmäki