Basic Electrical Engineering - Department of Applied Sciences and Engineering

1
Basic Electrical Engg.UNIT-IVAC Fundamental

• Prof. A. B. Kasar
• Assistant Professor
• Department of Applied Sciences Engineering
• HOPE FOUNDATIONS
• INTERNATIONAL INSTITUTE OF INFORMATION
  TECHNOLOGY,
• I²IT, PUNE

2
Overview of Presentation

• Definition of Alternating Quantity
• RMS or Effective Value
• Average Value
• Phasor Representation
• AC circuit with a pure resistance
• AC circuit with a pure Inductance
• AC circuit with a pure Capacitance

3
Definition of Alternating Quantity

• An alternating quantity changes continuously in
  magnitude and alternates in direction at regular
  intervals of time. Important terms associated
  with an alternating quantity are defined below.

4
Important Definations

• 1. Amplitude
• It is the maximum(ve or -ve) value attained by
  an alternating quantity. Also called as maximum
  or peak value
• 2. Time Period (T)
• It is the Time Taken in seconds required to
  complete one cycle of an alternating quantity.
  Denoted by T
• 3. Instantaneous Value
• It is the value of an alternating quantity at
  any instant. Instatenios values denoted by small
  letters
• 4. Frequency (f)
• It is the number of cycles that occur in one
  second. The unit for requency is Hz or
  cycles/sec.
• The relationship between frequency and time
  period can be derived as follows.
• Time taken to complete f cycles 1 second
• Time taken to complete 1 cycle 1/f second
• T 1/f

5
Important Definations

• 5. Angular Frequency (?)
• Angular frequency is defined as the number of
  radians covered in one second(ie the angle
  covered by the rotating coil). The unit of
  angular frequency is rad/sec. ?2pf

6
AVARAGE VALUE
7
AVARAGE VALUE NUMERICAL
8
AVARAGE VALUE NUMERICAL
9
RMS/EFFECTIVE VALUE
10
RMS/EFFECTIVE VALUE NUMERICAL
11
RMS/EFFECTIVE VALUE NUMERICAL
12
FORM PEAK(CREST) FACTOR
13
Phasor Representation
14
Continue.
15
Continue.
16
Continue.
17
AC circuit with Pure Resistance
18
AC circuit with Pure Resistance
19
AC circuit with Pure Inductance
20
AC circuit with Pure Inductance
21
AC circuit with Pure Inductance
22
AC circuit with Pure Capacitance
23
AC circuit with Pure Capacitance
24
References
Sr. No. Book Name Authors Vol. No. Publisher
1 Electrical Technology H Cotton CBS Publicati
2 A textbook of Electrical Technology B.L.Theraja Volume I S Chand
3 Basic Electrical Electonics Engineering S.K. Bhattacharya Pearson
4 Basic Electrical Engineering D.C Kulsshrestha Tata McGraw Hill
5 Electrical Technology Edward Hughes Pearson

25
THANK YOU
For further details, please conctact Amit B
Kasar amitk_at_isquareit.edu.in Department of
Applied Sciences Engineering Hope
Foundations International Institute of
Information Technology, I²IT P-14,Rajiv Gandhi
Infotech Park MIDC Phase 1, Hinjawadi, Pune
411057 Tel - 91 20 22933441/2/3 www.isquareit.edu
.in info_at_isquareit.edu.in