Electrical Machines
FREQUENCY RESPONSE ANALYSIS
TIME RESPONSE ANALYSIS AND STABILITY
MODELLING OF MECHANICAL SYSTEM AND CONTROL SYSTEM
INDUCTION MOTOR ANS SYNCHRONOUS MOTOR
TRANSFORMER AND D.C. MOTOR
- Introduction to Root-locus method
- Root-locus plots
- General rules for constructing roots loci
- Comments on the root-locus plots
- Introduction to Frequency-Response Analysis
- Bode diagrams or logarithmic plots
- The Gain in Bode diagrams
- Integral and derivative factors in Bode diagrams
- First-order factors in Bode diagrams
- Error in the First-order factors in Bode diagrams
- Transfer function of a first order factor in Bode diagram
- Quadratic factors in Bode diagram
- Phase angle of quadratic factor
- The resonant frequency & the resonant peak value
- General procedure for plotting Bode diagrams
- Minimum-phase systems and nonminimum-phase systems
- Transport lag in Bode Diagrams
- Determination of static position error constants
- Determination of static velocity error constants
- Determination of static acceleration error constants
- Polar Plot
- First-order factors of polar plots
- First-order factors of polar plots
- Quadratic factors of polar plots
- Transport lag of polar plot
- General shapes of polar plots
- Polar Plots of Simple Transfer Functions
- Log-magnitude versus phase plots
- Phase and gain margins
- Closed-loop frequency response for nonunity-feedback systems
- Introduction to Time domain analysis
- Unit-step response of first-order systems.
- Unit-ramp response of first-order systems
- Unit-impulse response of first-order systems.
- DC servomotors
- A servo system
- Effect of load on servomotor dynamics
- Step response of second-order systems
- Underdamped systems
- Critically damped system
- Overdamped system
- Definitions of transient-response specifications
- Second-order systems Rise Time
- Second-order systems Peak Time
- Second-order systems Maximum overshoot
- Second-order systems settling Time
- Servo system with velocity feedback.
- Impulse response of second-order systems.
- Steady-state errors
- Static position error constant
- Static acceleration error constant
- Comparison of steady-state errors in open-loop control system and closed loop control system
- Concept of stability
- Transient response of higher-order systems
- Stability analysis in the complex plane
- Dominant closed-loop poles
- Rouths stability criterion
- The relative stability of feedback control systems
- Axis shift
- The stability of state variable systems
- Stability of a second-order system
- Application of Rouths stability criterion to control system analysis
- Comparison between pneumatic systems and hydraulic systems
- Introduction to control system
- Examples of control systems
- Open loop systems
- Closed loop systems
- Closed-loop control versus open-loop control
- Complex variable & Complex function
- State-space model of Electrical systems
- State-space model of mechanical systems
- Transfer function of an armature-controlled motor
- Transfer function of a multiple-loop system
- Differential equations of physical systems
- Mathematical Modeling of Dynamic Systems
- Nonlinear systems
- The transfer function of linear systems
- Concept of Transfer function
- Impulse response function
- Block diagrams
- Block diagram of a closed-loop system
- Open-loop, feedforward and closed loop transfer function
- Closed-loop system subjected to a disturbance
- Theory of induction machines
- Three phase induction motors
- Construction of Induction motors
- Principle of operation of induction motor
- 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
- Rotor Current
- Condition for Maximum Starting Torque
- 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
- No-load Test
- Introduction to Synchronous Motor
- Principle of Operation of synchronous motor
- Method of Starting of synchronous motor
- Construction of synchronous motor
- Synchronous-motor power equation
- Synchronous Motor with Different Excitations
- Constant-power Lines
- Construction of V-curves
- V curves
- O-Curves and V -Curves
- Synchronous Motor Applications
- Synchronous Condenser
- Synchronous-motor losses and efficiency
- Transformer
- Theory of an Ideal Transformer
- Theory of transformer on no-load
- EMF Equation of transformer
- Voltage Transformation Ratio (K)
- Ideal Transformer on Load
- Resistance and Leakage Reactance of Transformer or Impedance of Transformer
- Equivalent Circuit of Transformer
- Voltage Regulation of Transformer
- Losses in Transformer
- Mathematical explanation of Hysteresis loss in transformer
- Shifting Impedances in A Transformer
- Simplified Equivalent Circuit of a Loaded Transformer
- Open Circuit Test on Transformer
- Transformer Cooling System
- Core of Transformer
- Three Phase Transformer
- Current Transformer
- Voltage Transformer or Potential Transformer
- Earthing Transformer or Grounding Transformer
- Transformer Ratio Test
- Winding temperature rise test on transformer
- Parallel Operation of Single-Phase Transformers
- Working of D.C. Motor
- D.C. Motor Principle
- Back or Counter E.M.F.
- Significance of Back E.M.F.
- Votage and power Equation
- Condition For Maximum Power
- Types of D.C. Motors
- Armature Torque of D.C. Motor
- Brake Horse Power (B.H.P.)
- Speed of a D.C. Motor
- Speed Relations & Speed Regulation
- Torque and Speed of a D.C. Motor
- Losses in a D.C. Motor
- Efficiency of a D.C. Motor & Power Stages
- D.C. Motor Characteristics
- Applications of D.C. Motors