Electrical driving device with asynchronous motor

The invention relates to an electrical driving device with asynchronous motor. The driving device comprises in series a pre-setting sensor 1 for pre-setting an active stator current in an asynchronous motor with cage rotor, a coordinate converter 2, a phase-sensitive rectifier unit 3 and an adjustable electrical power source 4 connected to the stator coils of the asynchronous motor 5. The output from the pre-setting sensor 1 for the active stator current is connected to a control input 7 of a rotor current frequency shaper 8, the output of which is connected to an input 9 of a reference signal shaper 10, the other input 11 of which is connected to the output of a reference frequency pre-setting sensor 12. The driving device according to the invention is characterised in that the driving device is provided with a multiplier 18 for multiplying the angular frequency of the rotor, the inputs 19, 20 of which are connected to a rotational angle sensor 6 for the rotor and reference frequency pre-setting sensor 12 respectively and the output of which is connected to the input 21 of the reference signal shaper 10. The outputs of the shaper 10 are connected to the inputs 22 and 23 respectively of the coordinate converter 2.