Three Phase Induction Motor
Subject and UNIT: Electrical Machines II: UNIT IV: Starting and Speed Control of Three Phase Induction Motor Engineering Electrical Machines - II
The method is not efficient from speed control point of view hence used as a starter rather than as a speed control method.
Three Phase Induction Motor
Subject and UNIT: Electrical Machines II: UNIT IV: Starting and Speed Control of Three Phase Induction Motor Engineering Electrical Machines - II
In this method, it is possible to have one, two or four speeds in steps, by changing the number of stator poles.
Three Phase Induction Motor
Subject and UNIT: Electrical Machines II: UNIT IV: Starting and Speed Control of Three Phase Induction Motor Engineering Electrical Machines - II
Now if supply voltage is reduced below rated value, as per above equation torque produced also decreases.
Three Phase Induction Motor
Subject and UNIT: Electrical Machines II: UNIT IV: Starting and Speed Control of Three Phase Induction Motor Engineering Electrical Machines - II
Thus by controlling the supply frequency smoothly, the synchronous speed can be controlled over a wide range.
Subject and UNIT: Electrical Machines II: UNIT IV: Starting and Speed Control of Three Phase Induction Motor Engineering Electrical Machines - II
A three phase induction motor is practically a constant speed motor like a d.c. shunt motor. But the speed of d.c. shunt motor can be varied smoothly just by using simple rheostats.
Subject and UNIT: Electrical Machines II: UNIT IV: Starting and Speed Control of Three Phase Induction Motor Engineering Electrical Machines - II
The various types of starters based on the above two methods of reducing the starting current are, 1. Stator resistance starter 2. Autotransformer starter 3. Star-delta starter 4. Rotor resistance starter 5. Direct on line starter
Three Phase Induction Motor
Subject and UNIT: Electrical Machines II: UNIT IV: Starting and Speed Control of Three Phase Induction Motor Engineering Electrical Machines - II
In a three phase induction motor, the magnitude of an induced e.m.f. in the rotor circuit depends on the slip of the induction motor.
Starting and Speed Control of Three Phase Induction Motor
Subject and UNIT: Electrical Machines II: UNIT IV: Starting and Speed Control of Three Phase Induction Motor Engineering Electrical Machines - II
Let us study in detail why starter is required for an induction motor.
Electrical Machines
Subject and UNIT: Electrical Machines II: UNIT IV: Starting and Speed Control of Three Phase Induction Motor Engineering Electrical Machines - II
Engineering Electrical Machines - II : UNIT IV : Starting, Speed Control and Braking of Induction Motors : Syllabus, Contents.
Circle Diagram - Three Phase Induction Motor | Electrical Machines
Subject and UNIT: Electrical Machines II: UNIT III: b. Circle Diagram Engineering Electrical Machines - II
Engineering Electrical Machines - II : UNIT III : Circle Diagram : Anna University Questions with Answers (Long Answered Questions)
Circle Diagram - Three Phase Induction Motor | Electrical Machines
Subject and UNIT: Electrical Machines II: UNIT III: b. Circle Diagram Engineering Electrical Machines - II
Engineering Electrical Machines - II : UNIT III : Circle Diagram : Anna University Two Marks Questions & Answers
Subject and UNIT: Electrical Machines II: UNIT III: b. Circle Diagram Engineering Electrical Machines - II
The induction motor is loaded by any of the following methods : 1. Brake test 2. By connecting a d.c. generator