Knowledgebase
Drive Efficiency
Posted by Mark Alspaugh on 11 October 2010 06:59 PM
All drives include components between the motor and drive pulley. These might include "V" belts, chains and/or gear reducers to decrease the output speed and increase torque. These might also include fluld couplings or other torque limiting devices. Most of these components have mechnaical inefficencies which must be accounted for in the power requirements calculations. For instance, if you have a 3 stage gear reducer and a fluid couplings in the drive train, the mechanical efficiency of that arrangement will be about 92%. That means you will have mechanical losses of about 8%. Make sure the number in the Efficiency line of the drives tab reflects the actual components you are using. If not sure, refer to a drive handbook or industry standard such as CEMA, DIN or ISO.

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