NOVELTY - A drive control unit (11) controls an electric drive (4), and a battery control unit (13) controls a high-voltage battery (6) of a high-voltage network (1). The drive control unit detects the failure of communication between battery and drive control unit. In case of failure, the drive output voltage of electric drive is set to lower voltage threshold value, according to the state of charge discharged from battery, while limiting the drive output current for charging the battery depending on maximum power consumption at the power output ports (3,5).    USE - Electric control unit (ECU) network device for driving an electric drive of electric drive system (claimed) in high-voltage network of electric vehicles such as electric cars, and hybrid vehicles. Can also be used in stationary applications such as wind turbines or solar panels.    ADVANTAGE - Alternative options for safe operation of electric drive system are provided, without need for switching-off the battery for their own protection against overload. The electric machine can be adjusted to ensure the safety of battery against overcharging. The danger to battery can be avoided by the critical or unacceptable operating conditions of battery. The back-up mode can be maintained temporarily until it is possible to seek a workshop with the vehicle. The charging current of high-voltage battery can be maintained in the safe range.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) an electric drive system; and    (2) a method for controlling electric drive in high-voltage network.    DESCRIPTION OF DRAWING(S) - The drawings show a schematic view of an electrical drive system of hybrid vehicle, a schematic representation of a signal diagram for drive signal waveforms with electric drive system, a schematic illustration of a method for controlling electric actuator, and a schematic representation of another method for controlling electric actuator.    High-voltage network (1)    Power output ports (3,5)    Electric drive (4)    High-voltage battery (6)    Drive control unit (11)    Battery control unit (13)