Fuse continuity detection

摘要

Systems, methods, and circuits are disclosed for detecting continuity of a fuse or other current protection device in a circuit. For example, a signal is generated and coupled onto a closed circuit in which the continuity of the fuse closes the circuit. The signal is then coupled from the closed circuit to a signal detector, which detects the presence of the signal and provides an output indicative of the presence of the signal. If the fuse blows, the circuit is opened, prohibiting the signal from being coupled to the signal detector, in which case the signal detector provides an output indicative of the absence of the signal. This example, however, are not exhaustive.

主权项

1. A system for determining the continuity of a fuse, the system comprising:
a fuse; a first galvanic isolator; a second galvanic isolator communicatively coupled in series with the first galvanic isolator and the fuse as part of a circuit; a signal-generation unit, communicatively coupled to the first galvanic isolator, configured to generate an electrical signal and to provide the electrical signal to the circuit by generating a current in the circuit via the first galvanic isolator only when the fuse is continuous; and a signal-detection unit, communicatively coupled to the second galvanic isolator, configured to determine whether the electrical signal is present in the circuit, wherein the signal-detection unit is configured to provide an output signal based, at least in part, on whether the electrical signal is present in the circuit.