Innovative technology for dismantling the windings of electric motors using ultrasonic radiation

Abstract

The use of ultrasonic radiation showed an advantage over the existing methods of dismantling the windings of electric motors (EM). The method is based on the cavitation impact of ultrasonic vibrations and the capillary effect, which helps the caustic soda solution (NaOH) to quickly penetrate into the thickness of the lacquer impregnation and contribute to the destruction of the insulation from the inside. Analysis of dismantling of EM windings on the basis of ultrasound was carried out by the method of active experiment planning. As a result, a mathematical model of the process of removing the “burnt” EM winding was obtained, and the optimal parameters of power and duration of ultrasound, the temperature and the concentration of the NaOH solution were determined. Asynchronous electric motors (AEM) are the most widespread receivers of electrical energy. To ensure reliable and trouble-free operation of the AEM as a part of technological processes, it is necessary to implement completely new methods for their protection with the possibility of preventive action, carrying out continuous monitoring of motor parameters. In contrast to the systems of classical protection, which are triggered by faults, the system being developed makes it possible to avoid severe emergencies by predicting and detecting damages at an early stage.