BM2253 BASICS OF ELECTRICAL ENGINEERING L T P C
3 0 0 3
AIM
To make the students understand the basics of electricity generation and utilization.
OBJECTIVES
• To study the magnetic circuits
• To study the principle and application of transformers
• To study the principle of operation of DC motors
• To study the principle and operation of AC machines
• To study the principle of fractional-kW motors and their applications.
UNIT I MAGNETIC CIRCUIT 9
Magnetic effects of electric current, Magnetic circuits, Magnetic materials and B-H relationship, Electromagnetic induction and force, Hysteresis and eddy current losses.
UNIT II DCMOTORS 9
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 III TRANSFORMERS 9
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 IV AC MACHINES 9
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 V FRACTIONAL -KW MOTORS 9
Single phase induction motor, principle of operation, torque-speed characteristics, two- phase 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 circuit-calculation
TOTAL : 45 PERIODS
TEXT BOOKS:
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.
REFERENCE:
1. Muhammad Rashid, “Power electronics circuit, devices and applications”, Prentice–Hall of India, 3rd ed, 2004
3 0 0 3
AIM
To make the students understand the basics of electricity generation and utilization.
OBJECTIVES
• To study the magnetic circuits
• To study the principle and application of transformers
• To study the principle of operation of DC motors
• To study the principle and operation of AC machines
• To study the principle of fractional-kW motors and their applications.
UNIT I MAGNETIC CIRCUIT 9
Magnetic effects of electric current, Magnetic circuits, Magnetic materials and B-H relationship, Electromagnetic induction and force, Hysteresis and eddy current losses.
UNIT II DCMOTORS 9
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 III TRANSFORMERS 9
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 IV AC MACHINES 9
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 V FRACTIONAL -KW MOTORS 9
Single phase induction motor, principle of operation, torque-speed characteristics, two- phase 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 circuit-calculation
TOTAL : 45 PERIODS
TEXT BOOKS:
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.
REFERENCE:
1. Muhammad Rashid, “Power electronics circuit, devices and applications”, Prentice–Hall of India, 3rd ed, 2004
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