Methods of Measurement of Performance Characteristics of Electric Generators

Abstract

The article investigates the methods and means of measuring the operating characteristics of elec-tric generators, namely the output voltage, resistance, frequency, current and torque. The analysis of literature sources that characterize the structural elements and the principle of operation of synchro-nous generators is carried out. Methods of measuring the operating characteristics of electric genera-tors are studied. Mathematical models that describe the relationships between physical quantities that characterize the parameters of electric generators are considered. The estimation of modern direc-tions of development of means of measurement of torques of electric generators is carried out. Meth-ods of data processing and visualization obtained by primary devices are studied. The dependence of the torque of electric generators and their output parameters is studied. A block diagram of a digital measuring sensor is constructed, which shows the main components of a device for measuring torque using an inductive sensor. Based on research, a method for measuring torque using an inductive sensor has been proposed, which allows increasing the sensitivity of the measurement by improving the metrological characteris-tics of the measuring channel. This improvement is that the coils that change their inductance under the action of torsional load on the motor shaft are not affected by electromagnetic interference created by the generator during operation. Simulation of the electrical circuit using the proposed method al-lowed to obtain the attenuation coefficient of the in-phase signal 80 dB at an input signal frequency of 10 kHz, thus providing high sensitivity. This model was tested, which made it possible to obtain errors in the simulation in the operating mode. The standard deviation and the absolute measurement error are determined. The Matlab / Simulink modeling complex was used to process the measurement results and study the errors, which allowed visualizing the transient characteristics of the measuring signal and obtain a possible error.