## 5.2.3. Slip
Rotor speed n lags behind the synchronous speed n slip speed n The quotient resulting from the slip speed and the rotating field speed has been defined as the slip s slip
An asynchronous motor has been connected to a mains voltage of f Solution: The rotor rated speed of n = 960 rpm at f Thus, the slip can be calculated
The slip accepts at rated load of motors values ranging between one and eight per cent. Greater slip values usually arise in less powerful motors. If we incorporate the speed limit values of the asynchronous machine in motor operation into the equation, we derive the following values for the slip s:
A solution according to the rotor speed yields the following: sn n = n n = n
Value and frequency of rotor voltage in idling rotors. The voltage generated by idling rotors is characterized as rotor idling voltage U U f The values of the voltage U induced in the rotor and its frequency f Value and frequency of the rotor voltage given any slip speed n U t If one establishes the quotient U
and thus U
resp. with ω = 2 • π • f ω The voltage (U |

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