Detection of the zero crossing of an A.C. voltage

Details Detection of the zero crossing of an A.C. voltage Detection of the zero crossing of an A.C. voltage

2007-06-26

2007-06-26

Berhane, Adolf (Department: 2838)

Electric power conversion systems

Current conversion

Using semiconductor-type converter

Reexamination Certificate

active

11254020

ABSTRACT:
A circuit for detecting the zero crossing of a variable voltage across at least one switching element, including circuitry for measuring the slope of the voltage when it varies in a given direction, and for indicating a zero crossing if this slope is comprised within a range of values.

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patent: 6756711 (2004-06-01), Ball et al.
French Search Report from corresponding French Application No. 0452372, filed Oct. 19, 2004.

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