Patent ID: 8860354

Claim:
A control circuit of an electric motor that has at least one phase, the control circuit adapted to generate, by a first digital-to-analog converter, a control signal for an electric high-voltage supply device of the phase, and to control a supply current of the phase based on a setpoint current, the electric supply device determining a high-voltage zone of the electric motor, comprising: a supply current measurement device adapted to provide a first analog signal having a value that corresponds with the setpoint current; an electronic control unit disposed in a low-voltage zone; an analog-to-digital converter, located in the high-voltage zone, adapted to convert the analog signal, or another analog signal that acts as the analog signal, into a corresponding digital signal that is made available to the electronic control unit; and a galvanic separation device arranged between the analog-to-digital converter and the electronic control unit; wherein the supply current measurement device includes a bleeder resistor arranged in series with the phase and a differential amplifier having inputs connected to contacts of the bleeder resistor; and wherein the control circuit includes a voltage converter adapted to provide, within the high-voltage zone, a floating low voltage to supply the analog-to-digital converter.