Information-Measuring System to Control the Electrical and Mechanical Motor Parameters

• Main Authors: K. S. Ermakov, E. V. Tumakova
• Format: Article
• Language: Russian
• Published: MGTU im. N.È. Baumana 2015-01-01
• Series: Nauka i Obrazovanie
• Subjects: electromechanical systems; induction motor; phasechronometric method; informationmeasuring system
• Online Access: http://technomag.edu.ru/jour/article/view/156

<p>The article considers the issue of creating an information-measuring system for an asynchronous motor. The presented system allows ensuring the failure-free protection of electromotor, considerably reducing costs of its unplanned repair, and reduced economical loss from idle time of the electric motor.</p><p>The developed system comprises a mathematical model and two subsystems to measure electrical and mechanical parameters of the asynchronous motor.</p><p>The electrical subsystem comprises a FLUKE company recording multi-meter a signal from which passes through the block of intervals and coding and comes to PC.</p><p>The mechanical subsystem uses technical tools of phase-chronometric method. This method developed at the department of Metrology and Interchangeability allows an increasing efficiency of developed informative-measuring system. Mathematical modeling is used to link information from subsystems (electrical and mechanical) to electromotor construction.</p><p>The work conducted mathematical modeling of some defects of electric motor, namely: rupture of rotor winding and line surge.</p><p>The mathematical model in Mathcad was based on a modified formula of Kloss. It allows us to tie the average current value of the torque of the induction motor with shaft speed and take into account the effect of the frequency and voltage.</p><p>The Matlab Simulink (the package for visual programming) environment was used to simulate a rupture of the rotor winding. Simulation results showed how the phase currents of the electric motor changed with the winding rupture.</p><p>The developed information-measuring system has a number of advantages over traditional systems used in this field (vibration-based diagnostics systems). It will allow an increasing efficiency of the system for diagnostics of electrical machines created on the basis of this information-measuring system.</p>