Patent ID: 11936285
Assignee: VALEO EQUIPEMENTS ELECTRIQUES MOTEUR
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 2:
3. The switch system as claimed in claim 1, wherein the current-limiting device comprises:
a control line comprising a control output connected to the control terminal of the main switch, a control input and a control resistor electrically connected between the control input and the control output, the control resistor being arranged to be passed through by a setpoint current;
a first and a second matched transistor each having a current input terminal, a current output terminal and a control terminal:
the control terminals of said first and second transistors and the current input terminal of the second transistor being directly connected together;
the output terminal of the first transistor being directly connected to the second terminal of the current-limiting device, and the output terminal of the second transistor being directly connected to the first terminal of the current-limiting device, so that the voltage between the control terminal of the first transistor and the second terminal of the current-limiting device is equal to the sum of the voltage at the terminals of the measurement resistor of the power line and of the voltage between the control terminal of the second transistor and the first terminal of the current-limiting device; and
the input terminal of the first transistor is connected to the control output to shunt a shunt current from the setpoint current passing through the control resistor, in order to decrease the control current entering the control terminal;
the input terminal of the second transistor is connected by means of a first bias resistor to the input of the control line.