Title:
【発明の名称】3相電源電圧の変換
Document Type and Number:
Japanese Patent JPH07502160
Kind Code:
A
Abstract:
A circuit is provided for generating a current that is a harmonic of the frequency of the utility system and which is of a selected amplitude and phase to reduce the total harmonic distortion of a system that converts alternating current to direct current, or vice versa. The DC signal is sampled and by controlling switches, a sinusoidal current at the desired harmonic is generated, and is provided to impedance network that injects this current into the multiphase AC system used by the utility in a very low cost, easily controlled, and highly effective manner. The impedance network comprises a single inductor and capacitance connected in series through each of the phases of the utility, with the current signal having an amplitude that is selected to substantially eliminate harmonics which cause high distortion of the utility signal.
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Inventors:
Mohan, Ned
Application Number:
JP51111792A
Publication Date:
March 02, 1995
Filing Date:
December 14, 1992
Export Citation:
Assignee:
Regents of the University of Minnesota
International Classes:
H02J3/01; H02M1/12; (IPC1-7): H02M1/12
Attorney, Agent or Firm:
Michito Hiraki (1 person outside)