Coded data generation or conversion – Phase or time of phase change – Synchro or resolver signal
Reexamination Certificate
2005-03-01
2005-03-01
Tokar, Michael (Department: 2819)
Coded data generation or conversion
Phase or time of phase change
Synchro or resolver signal
C341S112000, C341S155000
Reexamination Certificate
active
06861966
ABSTRACT:
A method for providing a digital current signal from an analog armature current signal of a motor. The method includes subjecting the analog current signal to an analog-to-digital conversion to produce a first digital current signal having current ripples for each current ripple of the analog current signal. During start-up and run-down motor operation phases, the analog current signal is sampled at a sampling rate which is greater than an expected rate of the current ripples of the analog current signal to produce a second digital current signal having current ripples for each current ripple of the analog current signal during the start-up and run-down motor operation phases. The current ripples of the first and second digital current signals are then compared. The current ripples of the second digital current signal which are in non-conformance with the current ripples of the first digital current signal are evaluated.
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Brooks & Kushman P.C.
Leopold Kostal GmbH & Co. KG
Nguyen Linh Van
Tokar Michael
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