BM2253 - Basics of Electrical Engineering |
UNIT I MAGNETIC CIRCUIT |
Magnetic effects of electric current, Magnetic circuits, Magnetic materials and B-H
relationship, Electromagnetic induction and force, Hysteresis and eddy current losses. |
UNIT II DC MOTORS |
Parts of DC motors, types of motors, principle of operation of DC motors, Back EMF,
circuit model, power balance, calculation of torque and speed, armature and field
control, DC motor starting, calculation of efficiency. |
UNIT IIITRANSFORMERS |
Methods of generation of AC voltages, role of transformers in the distribution of
electricity, Construction and principle of operation of single phase transformers, Ideal
transformer, voltage and current relationships, impedance transformation, definition of
voltage regulation, Losses in the transformer, calculation of efficiency of transformer,
construction and voltage ratio aspects of single phase autotransformer, construction and
voltage ratio aspects three phase transformer. |
UNIT IVAC MACHINES |
Synchronous machines, construction, principle of operation, phasor diagram , voltage
equation, Open circuit and short circuit characteristics, voltage regulation, induction
motor, construction, circuit model, torque slip characteristics, starting , speed control-slip
control , frequency control |
UNIT VFRACTIONAL -KW MOTORS |
Single phase induction motor, principle of operation, torque-speed characteristics, twophase
motors, split phase motor, universal motor, two value capacitance motor, stepper
motors - variable reluctance stepper motor-single stack and multistack-permanent
magnet stepper motor- drive concepts-unipolar drive circuit, bipolar drive circuitcalculation |
Text Book |
1. D P Kothari and I J Nagrath, “Basic Electrical Engineering”, TMH, 2ed, 2007.
2. P. C Sen, “Principles of Electric machines and power electronics”, John-Wiley &
Sons, 2ed, 2007. |
References |
1. Muhammad Rashid, “Power electronics circuit, devices and applications”,
Prentice–Hall of India, 3rd ed, 2004. |
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