#EMF EQUATION OF DC GENERATOR #EMF EQUATION OF DC MOTOR #TORQUE EQUATION OF DC MOTOR # EMF EQUATION OF DC MOTOR IN HINDI #DERIVATION OF DC MOTOR EMF EQUATION #FARADAY LAW OF ELECTROMAGNETIC INDUCTION #back emf in dc motor #back emf in dc motor in hindi In this video you will learn about,derivation of dc machine emf equation,back emf,torque equation of dc motor,dc generated,dc motor.To understand electrical machine with trick watch all videos, MUST UPGRADE YOUR KNOWLEDGE BY FLIPPED LEARNING #Topic - ELECTRICAL TRANSFORMER ~ Link of all sessions are. DAY 1 (Need/Definition) https://youtu.be/BvaykFJ_NoE DAY 2 (Working principle and Construction) https://youtu.be/06rgxocihaM DAY 3 (EMF equation and Turns Ratio) https://youtu.be/g7e5xBPmv3Y DAY 4 (Classification of Transformer) https://youtu.be/6NP5L4MlvY4 DAY 5 ( Ideal and practical transformer on no load) (Equivalent Transformer) https://youtu.be/6LCLQC1p3lg DAY 6 ( Losses in Transformer) https://youtu.be/ObYNiGgd3hA DAY 7 (O.C. and S.C. test) https://youtu.be/8WiJRawHiTce/6LCLQC1p3lg DAY 8 (Voltage Regulation & Efficiency) https://youtu.be/6LCLQC1p3lg DAY 9 (Zero Lecture) https://youtu.be/N4xWOwgi8I4 DAY 10 (Classification of machine) https://youtu.be/bmxnU5rC5m4 Construction of Machine https://youtu.be/34mpphDk3gg Working Principle of Synchronous Generator & Synchronous Motor https://youtu.be/bkgf72M8BCY Working Principle of Induction Motor https://youtu.be/Lj_iQBoRiK0

1. EMF EQUATION DERIVATION
ELECTRICAL MACHINE
EMF
EQUATION
OF DC
MACHINE
DAY 15

2. ELECTRICAL MACHINE
Syllabus
 Introduction of Machine
 Classification of Machine
 Construction of DC, Induction
& Synchronous machine
 Working Principle of
 DC Machine
 Synchronous machine
 Induction machine
 EMF Equation of
 DC MACHINE
 SYNCHRONOUS MACHINE
DAY 9
DAY 10
DAY 11
DAY 12
DAY 13
DAY 14

3. EMF EQUATION OF DC MACHINE
 A DC generator produces direct power based on fundamental principle of
Faraday's laws of electromagnetic induction.
 As the armature rotates, a voltage is generated in its coils.
 In the case of a generator, the emf of rotation is called the Generated
emf or Armature emf and is denoted as Eg.
 In the case of a motor, the emf of rotation is known as Back emf or Counter
emf and represented as Eb.
 The expression for emf is same for both the operations. I.e., for Generator as
well as for Motor.

4. EMF EQUATION OF DC MACHINE
P – Number of poles of the machine
ϕ – Flux per pole in Weber.
Z – Total number of armature conductors.
N – Speed of armature in revolution per minute (r.p.m).
A – Number of parallel paths in the armature winding.
In one revolution of the armature:-
Flux cut by one conductor= ϕ.P weber
Time taken to complete one revolution,
because

5. EMF EQUATION OF DC MACHINE

6.  If the machine DC Machine is working as a Generator,
the induced emf is given by the equation shown below.
Where Eg is the Generated Emf
If the machine DC Machine is working as a Motor, the
induced emf is given by the equation shown below.
Where Eb is the Back Emf
EMF EQUATION OF DC MACHINE

7. EMF EQUATION OF DC MACHINE
 For a given machine, the number of poles and the number of conductors
per parallel path (Z/A) are constant. Hence, the equation can be written as

8.  When the current carrying current is placed in the magnetic field, a force is
exerted or it which exerts turning moment or torque (F x r)
 This torque is produced due to the electromagnetic effect, hence is
called Electromagnetic torque.
 The torque which is used for doing useful work in known as the shaft torque.
 It is clear that the torque produced in
the armature is directly proportional
to the flux per pole and the armature
current.
TORQUE EQUATION OF DC MOTOR

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