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How to select a drive between motor and machine?

We should select a drive (direct/flexible, chain, flat/vee/ribbed belt, gearbox, vfd, rope, close couples etc) depending on the characteristics of load(speed, torque, power, fluctuating, periodical, constant, fan, pump, hoist, crane, reversing, braking, plugging, regenerating etc) and motor selection(squirrel cage or slip ring or design A,B,C,D etc and NEMA motor code letter A to V) as well as method of starting, DOL, star-delta, AT, primary R/X, shunt capacitor, soft start). The motor/starter/drive characteristics should match that of the load. Design and factors to be considered in selection.

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