Overload protection method

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 7688560
APP PUB NO 20080019066A1
SERIAL NO

11689691

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

This invention relates to overload protection for a circuit driving a direct current (DC) load. The invention provides a method of generating an overload condition for an output module driving a load having a load current and a load voltage comprising the steps of: monitoring the load current at sample intervals; comparing the monitored load current to a predetermined load current threshold; starting an overload timer in the event that the timer is not running and the monitored load current is greater than said load current threshold; monitoring the load voltage at said sample intervals; generating a ramped load voltage waveform for reference purposes in dependence upon an initial load voltage and a predetermined step size load voltage in the event that the overload timer is running; generating an overload condition in the event that the monitored load voltage is less than said ramped load voltage reference waveform, the ramped load voltage is less than a predetermined positive ramp limit and the overload timer is running.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddress
ROCKWELL AUTOMATION LIMITEDPITFIELD KILN FARM MILTON KEYNES BUCKINGHAMSHIRE MK11 3DR

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Meagher, Thomas Bruce Houston, US 14 49
Murphy, Kenneth John Henderson, US 4 16

Cited Art Landscape

Load Citation

Patent Citation Ranking

Forward Cite Landscape

Load Citation