Patent ID: 11955791
Assignee: FUJI ELECTRIC CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 8:
9. A power converter supplying power to a load through a plurality of arms, each including a semiconductor switch, the power converter comprising:
a first Rogowski coil configured to generate a first detection signal in accordance with a load short-circuit current, the load short-circuit current being a current that flows through a first arm from among a plurality of arms due to a short circuit in the load;
a second Rogowski coil configured to generate a second detection signal in accordance with an arm short-circuit current, the arm short-circuit current being a current that flows through the first arm due to:
a short circuit in the first arm; or
a short circuit in a second arm from among the plurality of arms;

a load short-circuit detection circuit configured to detect the short circuit in the load, based on the first detection signal;
an arm short-circuit detection circuit configured to detect the short circuit in the first arm or the short circuit in the second arm, based on the second detection signal;
a short-circuit detection circuit configured to detect a short-circuit, based on:
an output signal output from the load short-circuit detection circuit; and
an output signal output from the arm short-circuit detection circuit; and

a gate drive circuit configured to stop driving a semiconductor switch included in the first arm, based on a short-circuit detection signal output from the short-circuit detection circuit.