Patent · US Expired

Low harmonic rectifier circuit

US6774758B2 · kind B2 · utility

25Cited by

1References

4Claims

0Family size

Inventors

Kalyan P. Gokhale · New Berlin, US
Alpo Vallinmaki · Mukwonago, US
Nicklas Södö · Vaasa, FI

Key dates

Filing date	Sep 11, 2002
Grant date	Aug 10, 2004
Priority date	—
Expiry date	Sep 11, 2022

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49078
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.