Control arrangement
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 19, 2008
Grant Date -
May 6, 2004
app pub date -
Mar 22, 2002
filing date -
Mar 23, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A control arrangement is operable to control an electrical relay to supply current. The arrangement comprises current supply means and control means operable to provide a relay make signal and a relay break signal to control the state of the relay to respectively make and break a connection to the current supply means. Further control means are operable to enable or disable the current supply means. A first delay means operates to delay enabling the current supply means until after a relay make signal has been provided, to allow the relay to make the connection before current supply commences. Excess current is also sensed and controlled by a form of pulse-width modulation.
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