Electrical Machines II: UNIT IV: Starting and Speed Control of Three Phase Induction Motor
Adding Rheostats in Stator Circuit
Three Phase Induction Motor
The method is not efficient from speed control point of view hence used as a starter rather than as a speed control method.
Adding Rheostats in Stator Circuit AU : May-16, Dec.-16
We
have seen that the reduced voltage can be applied to the stator by adding the
rheostats in the stator circuit. The arrangement is shown in the Fig. 7.8.1.
The part of the voltage gets dropped across the resistances and reduced voltage
gets applied across the stator.
The
reduction in stator voltage causes reduction in the speed. The rheostats can be
varied as per the required change in speed. But the entire line current flows
through the rheostats and hence there are large power losses. The method is not
efficient from speed control point of view hence used as a starter rather than
as a speed control method.
Review Questions
1. Explain the speed control of induction motor by adding
rheostat in stator circuit.
2. Explain in detail the speed control methods of induction
motor.
3. Explain the speed control methods cf a three phase induction
motor. AU ; Dec.-16, Marks 16
Electrical Machines II: UNIT IV: Starting and Speed Control of Three Phase Induction Motor : Tag: Engineering Electrical Machines - II : Three Phase Induction Motor - Adding Rheostats in Stator Circuit
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Electrical Machines II
EE3405 Machine 2 EM 2 4th Semester EEE Dept | 2021 Regulation | 4th Semester EEE Dept 2021 Regulation