Examination 

Practical report (2000 words)

Introduction to single phase power generation, deriving single phase ac voltage equation from Faraday’s law, three phase power generation, three phase systems – star &amp; delta and three phase power 
 Induction Machines. Operating principle- Production of a rotating field. Induced EMF in the rotor, the concept of slip. Equivalent circuit. Power flow diagram. Performance calculations. Loss mechanisms. Efficiency. Torque/speed characteristics. Load curves and speed of operation. Speed control by classical means. The need for variable frequency. 
 Synchronous Machines- Motors and generators. Machine topologies and construction. Equivalent circuit. Performance. Phasor diagrams. Simple operating charts. Stability. 
 Working principle, performance, torque curve and theory of servo motor, stepper motor and DC motor. 
 Motor controlling unit – Motor drives for speed, torque control in motors: VFD, VSD 
 Single-Phase Transformers, principles of operation, equivalent circuit, load calculations, open- and short-circuit tests, regulation, loss mechanisms, uses of transformers, Construction, basic design principles and three phase transformers 
 DC-DC Converters. Principle of switched-mode power conversion. Power MOSFET and IGBT devices. Step-up and step-down chopper circuits. Operation of buck, boost converters, Inductive switching waveforms and switching losses. 
 AC-DC Converters. Single-phase, half and full-wave rectifier circuits with inductive DC filter. Thyristor characteristics. Single-phase and three phase - phase-controlled operation - rectification and inversion modes - applications. 
 Power transfer to non-linear loads, harmonics, power factor, input displacement factor and distortion factor

Electrical Machines and Drives for Biomedical Engineers - 5604ICBTBE

Electrical Machines and Drives for Biomedical Engineers

Apply the principles of power generation, three phase system and three phase power

Design and analyze the operation of power electronic devices and converters

Explain the operation of power electronic devices and its applications. Describe operation of DC-DC converters and phase-controlled AC-DC converters, switching losses and harmonic distortion due to power electronic devices

Identify operation and construction of the induction and synchronous machine, servo, stepper and DC motors, equivalent circuit analysis, performance analysis and introduction to transformer theory