The document discusses the properties of an ideal transformer. It states that an ideal transformer is a lossless device with an input and output winding. It has infinite magnetic permeability and electrical resistivity, with flux confined to the core and negligible winding resistances. The relationships between the voltages and currents in the input and output windings are given by equations relating the turns ratio. An ideal transformer is used to couple a load to a power source by "reflecting" the load impedance to the primary winding.

1. Ideal Transformers

2. Presentation
on
Ideal Transformer
Green University of Bangladesh

3. Introduce
…………..
Advisor
Dept. of EEE
Name:……
ID:…………
Dept. of EEE

4. Ideal Transformers
• An ideal transformer is a lossless device with an input winding and an
output winding. It has the following properties:
• No iron and copper losses
• No leakage fluxes
• A core of infinite magnetic permeability and of infinite electrical resistivity
• Flux is confined to the core and winding resistances are negligible

5. Ideal Transformers
• An ideal transformer is a lossless device with an input winding and an
output winding.
The relationships between the input voltage and the output voltage, and between the
input current and the output current, are given by the following equations.
 
 
 
 
a
ti
ti
tv
tv
p
s
s
p
In instantaneous quantities
fM

6. Ideal Transformer

7. Transformer Polarities

8. Turns Ratio
1
2
N
N
a 

9. Transformers

10. Coupling a Load to a Source
LIN Z
aI
V
aaI
a
V
I
V
Z
aII
a
V
V
2
2
2
2
2
2
1
1
21
2
1
11




11. “Reflecting” the Load Impedance to the Primary
LIN Z
a
Z 2
1


12. Thank you all