Overload protection for d.c. circuits

Details Overload protection for d.c. circuits Overload protection for d.c. circuits

B - Operations, Transporting

60

Q

342/29, 348/39,

B60Q 1/44 (2006.01)

Patent

CA 1300710

OVERLOAD PROTECTION FOR D.C. CIRCUITS ABSTRACT OF THE DISCLOSURE Protection for D.C. electrical circuit branches against incipient overloads comprises the use of semiconductor devices known as intelligent switches. An intelligent switch comprises a main controlled conduction path whose conductivity is controlled by an external control input. The semiconductor architecture is configured to possess internal self-protection for the main controlled conduction path against incipient current and/or temperature rises exceeding the device's rating by rendering the main controlled conduction path non-conductive when such incipient conditions are sensed. The invention, recognizing that this internal self-protection attribute can be used also to provide protection for external circuit components connected to the switch in the branch, further comprises the elimination of external protective devices from the branch such that the intelligent switch itself provides the entire overload protection within the branch. The invention is especially beneficial in automotive electrical application, imparting improvements to particular specific circuits of automotive electrical systems.

573916

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