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公开(公告)号：US20170187319A1
公开(公告)日：2017-06-29
申请号：US15382768
申请日：2016-12-19
CPC分类号： H02H3/066 , H02H3/087 , H02H3/093 , H02H3/0935 , H02H3/16 , H02H3/202 , H02H3/207 , H02H3/243 , H02H3/247 , H02H5/041 , H02H7/1213
摘要： An overcurrent protection circuit includes a load drive portion that drives a load based on a power supply voltage; a wire that connects the load and the load drive portion; a current detection portion that detects a load current showing a value of a current flowing through the load; a voltage detection portion; and a controller that controls the load drive portion to control a drive of the load, the controller determining an addition-and-subtraction value, controlling the load drive portion to cut off the load current, and stopping driving the load to protect a protection target from an overcurrent. The controller subtracts the integration value based on an elapsed time after cutoff of the load current. The controller controls the load drive portion to again start to drive the load, and also calculates a post-correction integration value lower than a pre-correction integration value by correcting the pre-correction integration value.
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公开(公告)号：US20180145501A1
公开(公告)日：2018-05-24
申请号：US15807804
申请日：2017-11-09
CPC分类号： H02H5/041 , H02H3/05 , H02H3/06 , H02H3/08 , H02H3/085 , H02H7/005 , H02H7/222 , H02M1/08 , H02M3/155
摘要： An overcurrent protection apparatus that protects, from overcurrent, a load circuit including an electric load and wiring electrically connected with each other is provided. The overcurrent protection apparatus includes: a semiconductor switching element that is configured to control energization to the load circuit; and a breaker that stops the semiconductor switching element upon detection of abnormality of overheat or overcurrent at the semiconductor switching element, the breaker having a latch operation mode of continuously stopping the semiconductor switching element even upon cancellation of abnormality detection, and a retry operation mode of canceling stoppage of the semiconductor switching element upon the cancellation of the abnormality detection. The breaker is configured to initially operate in the latch operation mode upon the abnormality detection, and then be switched to the retry operation mode after satisfaction of a predetermined condition.
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公开(公告)号：US20170207050A1
公开(公告)日：2017-07-20
申请号：US15399786
申请日：2017-01-06
IPC分类号： H01H47/00 , B60R16/03 , B60Q1/00 , H03K17/687
CPC分类号： H01H47/002 , B60Q1/0094 , B60Q11/00 , B60R16/03 , H03K17/0822 , H03K17/6871 , H03K2017/0806
摘要： A load drive apparatus includes: a first drive element that drives a first load; a second drive element that drives a second load; a control circuit that controls the first drive element and the second drive element; a power supply circuit that supplies electric power; and a failsafe circuit that includes an abnormality detection portion detecting whether an abnormality occurs in at least one of the control circuit and the power supply circuit, the failsafe circuit controlling the first drive element and the second drive element to drive the first load and the second load when the abnormality detection portion has detected that an abnormality occurs in at least one of the control circuit and the power supply circuit and also when the load drive apparatus receives at least one of a command directing a drive of the first load and a command directing a drive of the second load.
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