Basic Electronics and Electrical Engineering: Chapter 3: Transformer
Emf Equation of a Transformer
Transformer: Emf Equation of a Transformer
EMF
EQUATION OF A TRANSFORMER
Consider that an
alternating voltage V1 of frequency f is applied to the primary shown in Fig. 3.7 (a).
Let
N1 = No. of
turns in primary winding.
N2 = No. of
turns in secondary winding.
ϕm = maximum
flux in the core in Webers.
= Bm×A [where Bm is the
maximum flux density in the core and A is the core area].
f
=frequency of AC input in Hz.
Refer Fig. 3.7 (b)
Since flux increases from its zero value to maximum value ϕm in
quarter of the cycle. i.e, in 1/4 f
second.
Average rate of change
of flux = ϕm / (1/4 f).
= 4f ϕm Wb/sec (or) V
Now, rate of change of
flux per turn means induced emf in volts.
∴
Average emf/turn = 4 fϕm V
For sinusoidal wave
form
Form factor = r.m.s value
/ Average value = 1.11
r.m.s value of emf/turn
= 1.11×4 fϕm V
= 4.44 fϕm V
Now r.m.s value of emf
induced in primary winding
E1 = 4.44 fmϕmN1
V
E1 = 4.44 f BmAN1 V
Similarly, r.m.s value
of emf induced in secondary winding,
E2 = 4.44 fmϕmN2
V
E2 = 4.44 f BmAN2 V
Basic Electronics and Electrical Engineering: Chapter 3: Transformer : Tag: Basic Engineering : - Emf Equation of a Transformer
Basic Electronics and Electrical Engineering: Chapter 3: Transformer
Under Subject
Basic Electronics and Electrical Engineering
EE25C04 1st Semester ECE Dept | 2025 Regulation | 2nd Semester 2025 Regulation
Related Subjects
English Essentials I
EN25C01 1st Semester | 2025 Regulation | 1st Semester 2025 Regulation
தமிழர் மரபு - Heritage of Tamils
UC25H01 1st Semester | 2025 Regulation | 1st Semester 2025 Regulation
Applied Calculus
MA25C01 Maths 1 M1 - 1st Semester | 2025 Regulation | 1st Semester 2025 Regulation
Applied Physics I
PH25C01 1st Semester | 2025 Regulation | 1st Semester 2025 Regulation
Applied Chemistry I
CY25C01 1st Semester | 2025 Regulation | 1st Semester 2025 Regulation
Makerspace
ME25C04 1st Semester | 2025 Regulation | 1st Semester 2025 Regulation
Computer Programming C
CS25C01 1st Semester | 2025 Regulation | 1st Semester 2025 Regulation
Computer Programming Python
CS25C02 1st Semester | 2025 Regulation | 1st Semester 2025 Regulation
Fundamentals of Electrical and Electronics Engineering
EE25C03 1st Semester | 2025 Regulation | 1st Semester 2025 Regulation
Introduction to Mechanical Engineering
ME25C03 1st Semester | 2025 Regulation | 1st Semester 2025 Regulation
Introduction to Civil Engineering
CE25C01 1st Semester Civil Department | 2025 Regulation | 1st Semester 2025 Regulation
Essentials of Computing
CS25C03 1st Semester - AID CSE IT Department | 2025 Regulation | 1st Semester 2025 Regulation
Applied Physics I Laboratory
PH25C01 1st Semester practical Laboratory Manual | 2025 Regulation | 1st Semester Laboratory 2025 Regulation
Applied Chemistry I Laboratory
CY25C01 1st Semester practical Laboratory Manual | 2025 Regulation | 1st Semester Laboratory 2025 Regulation
Computer Programming C Laboratory
CS25C01 1st Semester practical Laboratory Manual | 2025 Regulation | 1st Semester Laboratory 2025 Regulation
Computer Programming Python Laboratory
CS25C02 1st Semester practical Laboratory Manual | 2025 Regulation | 1st Semester Laboratory 2025 Regulation
Engineering Drawing
ME25C01 EEE Mech Dept | 2025 Regulation | 2nd Semester 2025 Regulation
Basic Electronics and Electrical Engineering
EE25C04 1st Semester ECE Dept | 2025 Regulation | 2nd Semester 2025 Regulation