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Application of varistor in winding motor
Dec 13, 2017

Application of varistor in winding motor


Coal mill, evaporation machine, coal blower and other supporting high and low voltage winding motor original series frequency varistor and oil varistor to start. Since the complete secondary loop system consisting of slip ring, carbon brush, short-circuit link and other components and relays, AC contactor, frequency-sensitive rheostat (or oil-immersed rheostat) and other electrical components are basically installed on the production site, due to poor environment, There are the following weaknesses: carbon brush easy to wear; slip ring easy to produce sparks; poor contact caused by dust easily affect the normal opening and closing equipment and accelerated contact aging; time relay out of control and other intermittent burnout contactor and rheostat, resulting in the shutdown and Motor damage.

Brushless loop-free rheostat instead of the original series frequency varistor and oil varistor starter winding motor. Brushless loop varistor is the best magnetic principle and the best magnetic material, the original secondary circuit system composed of multi-contact components of the electromagnetic loop, through the process of change made of a non-contact electromagnetic components as a starting point Variable resistance of the new starter equipment, the principle and the rotor circuit in the same series frequency varistor. After using the brushless loop-less rheostat, when the constant torque load is dragged, the speed slightly decreases, but the requirements for starting and normal operation can be fully met. After use, the electrical operation has been very stable, electrical failures have dropped significantly, spare parts consumption decreased significantly, smooth start-up, simple structure, low maintenance costs, less maintenance work.