Electrical Energy Conservation in Steel Industry through Energy Efficient Motors

摘要

Electric motors are used in a variety of applications in steel industries. These motors are classified as Alternating Current (AC) and Direct Current (DC) motors, depending on the type of input supplied to the motor. AC motors are further classified as Synchronous motors and Asynchronous motors. In industries such as Steel, the synchronous motors are generally High Tension (HT) motors used as pumps & exhauster and has the advantage of providing power factor correction. Asynchronous motors are widely used in steel industries. The slip ring induction motors are generally used where high starting torque is required, such as in crane application, wagon Tripler etc. The squirrel cage induction motors are the workhorse of the industry. It is used in applications such as pumps, conveyors, ventilation fans, etc. Moreover, with the advent AC drives, these motors have replaced the slip ring induction motors and DC motors. DC motors have a few applications in the industries and because of the high cost of maintenance involved, the trend is to phase out the DC by AC inverter drive system.