发明名称 |
OVERLOAD PROTECTION METHOD |
摘要 |
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.
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申请公布号 |
US2008019066(A1) |
申请公布日期 |
2008.01.24 |
申请号 |
US20070689691 |
申请日期 |
2007.03.22 |
申请人 |
ICS TRIPLEX TECHNOLOGY LTD. |
发明人 |
MEAGHER THOMAS B.;MURPHY KENNETH J.;MURPHY LINDA M. |
分类号 |
H02H3/00 |
主分类号 |
H02H3/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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