Sub-harmonic detection and control system

Details Sub-harmonic detection and control system Sub-harmonic detection and control system

1999-12-20

2000-12-05

Riley, Shawn

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

323248, 307105, 361 85, H02J 102, G05F 113, H02M 112

Patent

active

061575526

ABSTRACT:
A distribution series capacitor control system is provided with a sub-harmonic detection module connected to an input signal and operable to detect the presence of at least two distinct types of sub-harmonic content in the input signal. A logical signal processor is electrically connected to the sub-harmonic detection module, and operates to independently determine the existence of self-excitation during induction motor starting and ferroresonant phenomena based upon the at least two distinct types of sub-harmonic content, respectively. A system controller is electrically connected to the logical signal processor and operates to eliminate effects of self-excitation during induction motor starting and ferroresonant phenomena on the system.

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patent: 4851782 (1989-07-01), Jeerings et al.
patent: 5487016 (1996-01-01), Elms
patent: 6031749 (2000-03-01), Covington et al.

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