Abstract
The possibility of carrying out monitoring of parameters and variables of the induction electric motor (IM) working as a part of the electric mining machinery drive is considered. Monitoring is carried out on the working inventory in real time by means of the computer system on the basis of the IM mathematical model, mathematical estimation methods and also information which is contained in easily measured phase tension and IM stator currents. As a result IM indicators are defined difficult or cannot be measured in the mining machinery operation course. These are the active and induced windings resistances of a stator and a rotor, a magnetic linkage, an angular frequency of a rotor rotation and the electromagnetic moment. Algorithms of dynamic IM identification and the software are developed for carrying out monitoring. Theoretical provisions and conclusions are confirmed with results of the pilot studies. Information received during monitoring can be used for perfecting of the electric drive.
Highlights
Monitoring of induction motors condition in the course of their work on the basis of dynamic identification can be used for further perfecting of asynchronous electric drives of mining machinery
The induction electric motor (IM) condition is understood some set of its parameters, output and intermediate variables and their derivatives which change in time in function for entrance influences
It is apparent that control system overall performance of the adjustable electric drive depends on knowledge of the current values of rotor rotation angular frequency, the electromagnetic moment and electromagnetic parameters of the motor – the active and induced resistance of IM windings
Summary
Monitoring of induction motors condition in the course of their work on the basis of dynamic identification can be used for further perfecting of asynchronous electric drives of mining machinery. It is apparent that control system overall performance of the adjustable electric drive depends on knowledge of the current values of rotor rotation angular frequency, the electromagnetic moment and electromagnetic parameters of the motor – the active and induced resistance of IM windings. The rotor rotation frequency can be measured at motor run, during the operation at the mining enterprises it is accompanied by the considerable technical difficulties All this means the need of indirect methods use of a IM condition monitoring, for example, the dynamic identification aims in obtaining necessary information by means of the computer information processing which is contained in the measured tension and stator currents on the basis of the IM mathematical model and mathematical estimation methods
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