ПОЗИЦІЙНИЙ АСИНХРОННИЙ ЕЛЕКТРОПРИВОД ІЗ РЕЛЕЙНИМ КЕРУВАННЯМ І ЗВОРОТНИМ ЗВ'ЯЗКОМ ЗА НЕПОВНИМ ВЕКТОРОМ СТАНУ

Optimization in speed is one of the main tasks of the synthesis of position control systems caused by a relatively high duration of transients. The relevance of the work is determined by the need to adapt progressive structural solutions to modern technical requirements and the possibilities of practical implementation of asynchronous electric drives. The purpose of the study is the structural optimization of the relay-vector position control system aimed at compensating for the incompleteness of the information-sensor system of the electric drive in the part of measuring mechanical coordinates. In addition to the characteristics of the sensors as such, the quality of the feedback signals and ultimately the properties of the system are decisively affected by the accuracy of the devices for differentiating the measured coordinates. Since state filters are implemented as closed trace systems, relay controllers in their composition are a guarantee of differentiation efficiency. The combination of the principles of vector control of the induction machine, sliding modes, speed optimization and the use of a two-level observer scheme for calculating canonical coordinates provide the control system of the positional asynchronous electric drive with exceptional functionality. The results of the study of typical dynamic modes of a positional electric drive designed on the basis of an asynchronous motor confirm the high efficiency of the proposed structural solution of the optimal control relay system. Due to the circuit based on the signals of the first and second derivatives of the position, the electric drive, which functions without a separate speed sensor, shows insensitivity to the action of the load moment. The proposed control algorithms are promising for implementation as part of digital controller software.