Calculate the synchronous speed of a 10-pole three-phase machine connected to a 50 Hz supply.
1. The generator characteristic shown in Figure 9.28 is for a (a) shunt machine (b) series machine (c) differentially compounded machine (d) cumulatively compounded machine 2.The speed of a DC motor can be increased by (a) reducing the brush pressure (b) weakening the field strength (c) strengthening the field (d) reducing the armature voltage […]
What is meant by the slip of an induction motor
1.(a) What is meant by the slip of an induction motor (b) The rotor of a four-pole three-phase induction motor revolves at 1380 r/min. The slip is 8%. Find the supply frequency. 2.Calculate the frequency of the rotor EMF for each of the machines of Exercises 7, 8 and 9. 3. (a) Why can’t […]