Blown fuse detection apparatus, blown fuse detection method, and computer program

A blown fuse detection method for detecting, by a computer, whether or not there is a blown fuse among a plurality of fuses respectively disposed on a plurality of current paths branched from one end of a DC power source, the method includes the steps of:

• providing a plurality of capacitors that are respectively connected to ends on a downstream side of a corresponding one of the plurality of fuses;
• providing a current path connected to a downstream side of each of the plurality of capacitors;
• providing a circuit switch disposed on the current path and configured to open and close the current path;
• providing a circuit resistor to which a plurality of currents that have flowed through the plurality of capacitors are input, the circuit switch interposed between the downstream side of each of the plurality of capacitors and the circuit resistor
• wherein the method includes
• a step of instructing, by the computer, that the circuit switch be switched on,
• a step of obtaining, by the computer, a detected value of a resistance voltage between two ends of the circuit resistor that decreases with a lapse of time in a state where the circuit switch is on, and
• a step of determining, by the computer, based on the obtained detected value, whether or not there is a blown fuse among the plurality of fuses.

A computer program product for detecting whether or not there is a blown fuse among a plurality of fuses respectively disposed on a plurality of current paths branched from one end of a DC power source, in a circuit that includes a plurality of capacitors that are respectively connected to ends on a downstream side of the plurality of fuses, and a circuit switch and a circuit resistor to which a plurality of currents that have flowed through the plurality of capacitors are input,

• wherein the computer program product comprises a non-transitory, machine-readable medium storing instructions which, when executed by at least one programmable processor, causes at least one programmable processor to perform operations comprising:
• a step of instructing that the circuit switch be switched on,
• a step of obtaining a detected value of a resistance voltage between two ends of the circuit resistor that decreases with a lapse of time in a state where the circuit switch is on, and
• a step of detecting, based on the obtained detected value, whether or not there is a blown fuse among the plurality of fuses.