Power supply device, control method, and storage medium

A control method for a power supply device, the power supply device including

• a main power supply configured to supply electric power to electrical equipment,
• an auxiliary power supply different from the main power supply, the auxiliary power supply being configured to supply electric power to the electrical equipment,
• a first main power supply line configured to connect the main power supply to the electrical equipment,
• a second main power supply line different from the first main power supply line, the second main power supply line being configured to connect the main power supply to the electrical equipment,
• a first auxiliary power supply line configured to connect the auxiliary power supply to the first main power supply line,
• a second auxiliary power supply line configured to connect the auxiliary power supply to the second main power supply line,
• a first switching element provided on the first main power supply line, the first switching element being configured to switch a state of power supply from the main power supply to the electrical equipment,
• a second switching element provided on the second main power supply line, the second switching element being configured to switch the state of power supply from the main power supply to the electrical equipment,
• a third switching element provided on the first auxiliary power supply line, the third switching element being configured to switch a state of power supply from the auxiliary power supply to the electrical equipment, and
• a fourth switching element provided on the second auxiliary power supply line, the fourth switching element being configured to switch the state of power supply from the auxiliary power supply to the electrical equipment,
• the control method comprising:
• causing a processor of the power supply device to detect a failure of the first switching element by comparing an output value on an upstream side with an output value on a downstream side of the first switching element in a state in which the first switching element and the third switching element are opened whereas the second switching element and the fourth switching element are closed.

A non-transitory computer readable storage medium storing a control program for a power supply device, the power supply device including

• a main power supply configured to supply electric power to electrical equipment,
• an auxiliary power supply different from the main power supply, the auxiliary power supply being configured to supply electric power to the electrical equipment,
• a first main power supply line configured to connect the main power supply to the electrical equipment,
• a second main power supply line different from the first main power supply line, the second main power supply line being configured to connect the main power supply to the electrical equipment,
• a first auxiliary power supply line configured to connect the auxiliary power supply to the first main power supply line,
• a second auxiliary power supply line configured to connect the auxiliary power supply to the second main power supply line,
• a first switching element provided on the first main power supply line, the first switching element being configured to switch a state of power supply from the main power supply to the electrical equipment,
• a second switching element provided on the second main power supply line, the second switching element being configured to switch the state of power supply from the main power supply to the electrical equipment,
• a third switching element provided on the first auxiliary power supply line, the third switching element being configured to switch a state of power supply from the auxiliary power supply to the electrical equipment, and
• a fourth switching element provided on the second auxiliary power supply line, the fourth switching element being configured to switch the state of power supply from the auxiliary power supply to the electrical equipment,
• the control program causing a processor of the power supply device to execute processing, the processing comprising:
• detecting a failure of the first switching element by comparing an output value on an upstream side with an output value on a downstream side of the first switching element in a state in which the first switching element and the third switching element are opened whereas the second switching element and the fourth switching element are closed.