this about single phase transformers and I hope to enjoy with it.

1. SinglePhaseTransformers
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2. Question1
a low voltage winding connected in delta or in
star connection?
Star
Question2
A Magnetic field can Produce by what?
Coil
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3. Introduction
A transformer is a device for increasing or
decreasing an AC voltage.
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4. ConstructionalFeaturesofSingle-Phase
Transformers
A transformer consists of two coils of wires known as primary
and secondary windings.
Where:
• VP - is the Primary Voltage
• VS - is the Secondary Voltage
• NP - is the Number of Primary Windings
• NS - is the Number of Secondary Windings
• Φ (phi) - is the Flux Linkag
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5. ConstructionalFeaturesofSingle-Phase
Transformers
A single-phase transformer
can operate to either
increase or decrease the
voltage applied to the
primary winding.
1) When a transformer is
used to “increase” the
voltage on its secondary
winding with respect to
the primary, it is called
a Step-up transformer.
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6. ConstructionalFeaturesofSingle-Phase
Transformers
2) When it is used to
“decrease” the voltage
on the secondary
winding with respect to
the primary it is called
a Step-down
transformer.
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7. ConstructionalFeaturesofSingle-Phase
Transformers
3) a third condition exists
in which a transformer
produces the same
voltage on its
secondary as is applied
to its primary winding.
This type of transformer
is called an “Impedance
Transformer”
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9. According to the design, transformers can be classified
into two:
1. Core- Type Transformer. 2. Shell-Type Transformer.
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10. Oil Filled Self-
Cooled Type.
Oil Filled Water
Cooled Type.
Air Blast Type.
According to the type of cooling employed
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12. Question
On the outside of the transformer there are
components what are the function of them?
1. Some help it to remain at a good working
temperature.
2. Some help make it safer in the event of
accident.
3. Some are used for monitoring.
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video

13. TheoryofOperation
The operation of a transformer is based on two
principles:
1. A voltage is induced in a conductor when the
conductor passes through a magnetic field.
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14. 2. A current passing through a conductor will
develop a magnetic field around the conductor.
TheoryofOperation
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17. Question
True Or False
The winding which is connected to the supply mains is known as
Secondary winding ( × )
The winding which is connected to the load is known as Primary
winding ( × )
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18. IdealofTransformers
• Two magnetically coupled coils
• Primary: N1 turns
• Secondary: N2 turns
• Primary and secondary can be arbitrarily
assigned
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19. IdealofTransformers
Ideal assumptions
• No flux leakage.
• No eddy currents. Recall from magnetic circuits lecture
• No winding resistance.
• Near infinite core permeability.
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21. EMFequationandtransformationratio.
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22. VoltageTransformationRatio(K)
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23. 1. A 50Hz transformer primary voltage of the screw 300 and 5000,
determining the tax
a. Mutual flux Φm.
b. If the 230 V secondary voltage of the secondary screw.
Are,
ƒ = 50Hz has been invoked
Np = 5000 Qm =?
Ep = 2300 Volt Ns =?
Es = 230 Volt
A. Ep = 4.44 ƒNpΦ
Φ = Ep / 4.44ƒNp
= 2300/4.44 × 50 × 5000
= 2.09 mweb. Ans.
B. Es = 4.44 ƒNsΦ
Ns = Es / 4.44ƒΦ
= 230 / 4.44 × 50 × 2.09mweb
= 500 Ans
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