Servo motor

The servomotor (1) regulation system comprises a high voltage supply (5), a control circuit (7) acting on the servomotor drive, and a braking circuit (9). An auxiliary voltage supply (13) is generated from the main high voltage supply through a DC intermediate circuit (11) and DC/DC converter (41), and includes a capacitor (15), a battery (17), and/or an accumulator (19). A voltage supervisory circuit (31) initiates emergency shutdown of the motor if the supply voltage is too low or the current too high, and can be connected to shut down a number of servomotors in succession. The auxiliary voltage supplies the motor control circuit at least during the initial stage of emergency braking.