CONTACTLESS CAPACITIVE SENSOR OF THE SYSTEM FOR MONITORING THE PARAMETERS OF THE BEATING OF THE POWERFUL ELECTRICAL MACHINES SHAFTS
Viktoriia Bereznychenko, Євген Олександрович ЗАЙЦЕВ · Praci Institutu elektrodinamiki Nacionalanoi akademii nauk Ukraini · 2020
In this paper presents the results of the definition the need to use a Kelvin guard ring to reduce the impact of external fields and non-uniformity of equipotential lines to change response characteristic of the capacitive sensor with a central high-potential electrode and a Kelvin guard ring. Measuring transducer placing in the immediate vicinity of the electrodes of the sensor, which eliminates the need to use a triaxial cable, was proposed. The sensor is designed to measure powerful generators shafts cylindrical surfaces parameters run-out. Capacitive sensor response characteristic function which depending on distance between the general plane of electrodes of the sensor and the grounded surface of a shaft is determined analytically and by computer simulation methods. The expediency of using computer modeling tools by finite element analysis methods for studying the metrological characteristics of sensors was shown. References 21, figures 4, table 1.