Patent ID: 11936370
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. The protection method according to claim 8, further comprising:
connecting a non-inverting input terminal of a first operational amplifier of a current generation circuit to a voltage generation circuit that generates a voltage of which a value is changed according to the temperature of the power semiconductor;
connecting an inverting input terminal of the first operational amplifier to an output terminal of the first operational amplifier and a first terminal of a first resistor;
connecting a non-inverting input terminal of a second operational amplifier to a first terminal of a third resistor and a first terminal of a fourth resistor;
connecting an inverting input terminal of the second operational amplifier to a second terminal of the first resistor and a first terminal of a second resistor;
connecting an output terminal of the second operational amplifier to a second terminal of the second resistor and a first terminal of a fifth resistor;
connecting a second terminal of the fourth resistor to a second terminal of the fifth resistor and a capacitor; and
connecting a second terminal of the third resistor to a ground terminal.