High-voltage system and failure diagnosis method for high-voltage system

A high-voltage system, comprising:

• a first circuit that includes a power source and a ground;
• a second circuit that is magnetically coupled to the first circuit via a transformer and includes a load connected to the ground;
• a controller that is connected to the ground;
• a third circuit that is connected to the second circuit and the ground;
• a first resistor that is provided between a connection point at a high potential end of the second circuit and the ground;
• and
• a second resistor that is provided between a connection point at a low potential end of the second circuit and the ground, and has a resistance value different from a resistance value of the first resistor;
• wherein, when a voltage across the second resistor is equal to or higher than a predetermined threshold voltage, an operation of the first circuit is stopped or an alarm is output.

A failure diagnosis method for a high-voltage system which includes:

• a first circuit that includes a power source and a ground;
• a second circuit that is magnetically coupled to the first circuit via a transformer and includes a load connected to the ground;
• a controller that is connected to the ground;
• a third circuit that is connected to the second circuit and the ground;
• a first resistor that is provided between a connection point at a high potential end of the second circuit and the ground;
• and
• a second resistor that is provided between a connection point at a low potential end of the second circuit and the ground, and has a resistance value different from a resistance value of the first resistor,
• wherein, when a voltage across the second resistor is equal to or higher than a predetermined threshold voltage, it is determined that the high-voltage system has failed.