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Electric motor slip

The difference in the speed of the rotor (rotor) and stator (stator) or stator field is called slip. Slip is one of the most important parameters of asynchronous machines and is usually specified on the nameplate of every motor. In order to achieve a good level of efficiency, the slip should be as small as possible. When the load is high, however, the difference in speed between the three-phase motors increases. Because the greater the torque demanded by the rotor, the more the speed drops and the slip increases. For this reason, modern asynchronous motors are often equipped with a frequency converter that keeps the speed of the asynchronous machine constant in every load situation.