Electrical Engineering ⇒ Topic : Starting of Squirrel Cage Motors
Squirrel-Cage Motors :
Slip Ring Motors :
(1) Rotor rheostat
(1) stator rheostate Starter. The connection diagram is shown in Fig.(a)
Fig. (a) Stator rheostat starter.
Reduced voltage is impressed on each stator phase due to the resistance R of the rheostat.Hence the initial current drawn from the supply mains will be less than if the machine were to be switched directly on to the supply mains.
If x = fraction of -voltage (V) reduced by the stator resistors
This method is suitable for starting of small machines only.
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