Electrical Machines Course: DC, Synchronous and Induction Machines and Transformers

• Importance and construction of DC machines
• Armature winding and emf equation
• Separately excited DC machine
• Shunt and series DC machines
• Types and applications of compound DC motors
• Torque-speed characteristics and speed control of separately excited DC motor
• Torque-speed characteristics of series DC motor
• Starting of DC machine
• Armature reaction in DC machines
• Losses in DC machines
• Dozens of solved examples on all types of DC machines
• Importance of the magnetic circuit and its application like transformer
• Difference between linear and non linear materials
• Important definitions of magnetic circuits, flux linkage and reluctance
• Analogy between the magnetic and electric circuits (resistance, reluctance, conductivity, permeability, emf, mmf, current, flux, etc.)
• Induced emf, fringing effect and ampere right hand rule or screw rule
• Importance of transformers and why it is considered as the backbone of the power system
• Construction of the transformer and its main components
• Iron core which is responsible for the magnetic flux action
• Magnetic circuit which is represented by the iron core
• Windings of transformer, types, categories and construction
• Insulating material between the windings and iron core + transformer oil and its great importance
• Conservator of transformer which contains oil and its function
• Breather which is used as filter in transformer
• Bushings which is important for human safety and protection from instant death
• Tap changer which is used to control the voltage according to the load variations
• Cooling tubes for transformer oil cooling and heat dissipation

• Buchholz relay in transformer for gas detection
• Explosion vents for protection of transformer in case of internal faults
• Different methods of cooling of transformer and their corresponding power rating
• Different types of transformers as power and distribution transformers
• Difference between single phase core and shell type transformers
• Difference between three phase core and shell type transformers
• Comparison between the shell type and core type transformers
• Theory of operation of transformer
• Effect of loading on transformer
• Transformer rating, regulation and efficiency
• Different losses occurring in transformer
• Approximate and exact equivalent circuits of the transformer
• Voltage relation in the transformer
• Ideal and non-ideal transformers and understand which one of them represents an actual real-life transformer
• Concept of referring in transformer
• Principle of operation of synchronous motor
• Construction and principle of operation of synchronous generator
• Equivalent circuit and phasor diagram of salient synchronous machine
• Equivalent circuit and phasor diagram of non-salient synchronous machine
• Parallel operation of two generators
• Synchronization of the machine with the grid
• Dozens of solved examples on synchronous machines salient and non-salient
• Construction and theory of operation of induction machines
• Equivalent circuit and power flow in the induction motor
• Torque-speed characteristics of induction motor
• Methods of speed control of induction motor
• Methods of starting induction motor
• Principle of operation of doubly fed induction generator
• Self-excited induction generator
• Dozens of solved examples on induction machines

Course Summary

1. DC Machines
2. Construction of Transformer
3. Fundamentals of Magnetic Circuits
4. The theoretical part on Transformers
5. Synchronous Machines
6. Induction Machines

Who Is This Course For

• Electrical Engineers,
• Technologists,
• Industrial Technicians,
• Electricians,
• Students.

Requirements

Must have knowledge about Fundamentals of Electric Circuits