Electrical Machines II (AC Machines)
Alternators
Synchronous generator
Synchronous motor
Induction machines
Speed control of Induction Motors
- Armature Reaction in Alternator
- Summary of Armature reaction in alternator:
- Alternator on Load
- Synchronous Reactance
- Basic Principle of Alternators
- Advantages of stationary armature
- Basic Construction of Alternator
- Detailed Construction of Alternator
- Damper Windings & Speed and Frequency of Alternator
- Armature Windings
- Concentric or Chain Windings
- A.C. Armature Windings of Alternator
- Pitch factor of alternator
- Distribution Factor
- E.M.F. Equation of an Alternator
- Phasor Diagram of a Loaded Alternator
- Voltage Regulation of alternators
- Determination of Voltage Regulation
- EMF method
- MMF method for voltage regulation determination
- Procedure for mmf Method
- Potier method
- Procedure for potier method
- Two reaction theory
- Effect of Salient Poles
- Analysis by two reaction theory
- Modified phasor diagram by two reaction theory
- Reluctance Power
- Power angle characteristic of salient pole machines
- Losses and efficiency of an alternator
- Parallel Operation of synchronous generator
- Advantages and condition of Parallel Operation of synchronous generator
- Methods of Synchronization
- Synchronising Action
- Effects on synchronising action
- Synchronizing Current
- Synchronizing Power
- Synchronous generator Connected to Infinite Busbars
- Alternators Connected to Infinite Busbars
- Two identical synchronous generators in parallel
- Alternators on Infinite Busbars
- Load Sharing
- Effect of Change in Excitation on an alternator connected to an infinite busbars
- Effect of change of fuel supply to alternators connected to infinite busbar
- Governor characteristics
- Electrical load diagram
- Introduction to Synchronous Motor
- Principle of Operation of synchronous motor
- Method of Starting of synchronous motor
- Construction of synchronous motor
- Motor Starting by Reducing the supply Frequency
- Motor Starting with an External Motor
- Motor Starting by Using damper (Amortisseur) Winding
- Motor on Load with Constant Excitation
- Power Flow within a Synchronous Motor
- Equivalent circuit model and phasor diagram of a synchronous motor
- Synchronous-motor power equation
- Synchronous Motor with Different Excitations
- Effect of Increased Load with Constant Excitation
- Effect of Changing Excitation on Constant Load
- Different Torques of a Synchronous Motor
- Salient Pole Synchronous Motor
- Effect of changes in load on armature current, power angle, and power factor of synchronous motor
- Effect of changes in field excitation on synchronous motor performance
- Constant-power Lines
- Construction of V-curves
- V curves
- O-Curves and V -Curves
- Hunting
- Methods and procedure of Starting a Synchronous Motor
- Comparison Between Synchronous and Induction Motors
- Synchronous Motor Applications
- Synchronous Condenser
- Synchronous-motor losses and efficiency
- Theory of induction machines
- Three phase induction motors
- Construction of Induction motors
- Principle of operation of induction motor
- Rotating Magnetic Field Due to 3-Phase Currents
- Properties of rotating magnetic field
- Alternate Mathematical Analysis for Rotating Magnetic Field
- slip and rotor frequency of induction motor
- Effect of Slip on The Rotor Circuit
- Rotor Current
- Rotor torque and Starting Torque of induction machines
- Condition for Maximum Starting Torque
- Starting Torque of 3-Phase Induction Motors
- Behaviour of 3-phase induction motor on load
- Torque Under Running Conditions
- Maximum Torque under Running Conditions
- Torque-Slip Characteristics
- Full-Load, Starting and Maximum Torques
- comparison of induction motor and transformer
- Speed Regulation of Induction Motors
- Speed Control of 3-Phase Induction Motors
- Power Factor of Induction Motor
- Power Stages in an Induction Motor
- Induction Generator
- No-load Test
- Blocked Rotor Test
- Construction of the Circle Diagram
- Double Squirrel Cage Motor
- single phasing
- Time Harmonics of Induction motors
- Effects of air gap flux harmonics
- Construction & Working of Double Squirrel-Cage Motors
- Equivalent Circuit of Double Squirrel-Cage Motor
- cogging
- crawling
- Line excited and self excited induction generato
- principle of operation of induction generator
- Applications of Induction generator
- Induction generator controller technology
- Direct-switching or Line starting of Induction Motors
- Stator resistance starting of induction motors
- Primary resistors starting of Induction motor
- Autotransformer starting of Induction motor
- Star-delta Starter of induction motor
- Rotor resistance starting of induction motor
- Speed Control of Induction Motors
- Speed control by changing applied voltage
- Rotor resistance speed control of Induction motors
- Cascade speed control of induction motor
- Pole changing speed control scheme of induction motor
- Stator frequency control of induction motor