Standardized three-phase electric motors for general purposes, manufactured under European IEC standard in aluminum with removable foot. Three-phase electric motor 7.5 kW (10 hp) 230/400V 1500 rpm Flange B5. Made of cast aluminum. Nowadays, with the development of power semiconductors, induction motors may be considered as serious rivals to dc motors in many speed control systems. 3-phase induction motors are simple, rugged, low-priced, easy to maintain and can be manufactured with characteristics to suit most industrial requirements. When fed from constant voltage constant frequency they run at nearly constant speed from no-load to full-load. Three-phase induction motors are the most widely used electric motors in industry. Its theory of operation is based on the mutual electromagnetic induction between the primary circuit and secondary circuit. The conversion process takes place through the rotating magnetic field. It converts the ac electrical power input into a mechanical power output. Three phase induction motor is one of ac machines family.
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