Sinusoidal signal decoder for 12-step motor commutation
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United States of America Patent
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Apr 30, 1991
Issued Date -
N/A
app pub date -
Mar 30, 1990
filing date -
Nov 3, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
12-step motor commutation is provided by a three-phase sinusoidal signal generator and related circuitry. Circuitry which compares the voltage outputs of two primary signals provides two additional switching points for every 360 electrical degrees. Three comparator circuits provide six additional switching points. Primary voltage outputs are weighted in the ratio of 2:1 prior to comparison.
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