MODERN PROBLEMS OF MODERNIZATION OF AUTOMATIC CONTROL SYSTEM FOR CONTACTLESS ELECTROMAGNETIC BEARINGS
Currently, many compressor stations use asynchronous motors as part of the gas-pumping unit. But often, when creating new samples and models of technological devices, the question of stable operation of the automatic control system (ACS) of contactless electromagnetic bearings of an asynchronous motor remains without attention, which creates certain problems in the process of operation. In this article the device of electromagnetic bearings (EMF) is considered, the reasons of occurrence of static errors and instability in work of system of automatic regulation of EMF are analyzed. The study of technological failures in the control system, the dependence of changes in the vibration displacement of the rotor EMF on the quality of process control using different types of regulators. The EMF rotor has ferromagnetic plates receiving the effect of a magnetic field from the coils of the fixed part. The rotor is in a suspended position relative to the center of the stator axis, not in contact with it. Static errors and incorrect operation occur due to the eccentricity of the rotor from the nominal position. The Problem of rotor deflection due to vibration displacement of electromagnetic bearings has become a prerequisite for the development of fault-tolerant automatic EMF control system based on the latest software and hardware. The paper describes the principles of electromagnetic suspension systems, methods of non-contact suspension, describes the causes of vibration displacement of electromagnetic bearings in asynchronous motors, and analyzes the causes of misalignment and unstable operation in the automatic control system of bearings. The possibility of introducing potentially promising solutions to eliminate incorrect operation of the EMF control system, as well as ensuring the required quality indicators of the devices during the technological process at gas transport and gas-operating enterprises is considered.