need better explanation in detail please and third opinion on this because I am
ID: 1402395 • Letter: N
Question
need better explanation in detail please and third opinion on this because I am still confused!
We did our lab on AC fields. We put two different coils of wires where one coil was connected as primary coil and one was connected as secondary coil with N turns and two coils with N turns were put in diffierent setups and the primary current Ip and secondary currents going through the coils with N turns were recorded through voltmeters. The setups for both coils in primary and secondary positions are shown in figure below: and coil with N = 800turns, 200 and400 turns were used in the lab.
Figure 2: here is how the setup was
1. Referencing the data collected in Section 3.4,
(a) determine which core configuration transfers the maximum electromagnetic effect to the secondary coil. Develop a theory to explain the differences between the core configurations, what about the U configuration, box, air and the iron core configurations? what are the differences? how do I know which one transfers maximum electromagnetic effect?
(b) determine the coil configurations that are “Step-Up Transformers” (i.e. output voltage is greater than input voltage), “Step-Down Transformers” (output voltage is less than input voltage) and “Isolation Transformers” (output voltage is the same as input voltage),
(c) What additional changes might be made to increase the transfer of electromagnetic effect from one coil to another?
Figure 3: data for this section
Explanation / Answer
a.
Box is the best way to transfer maximum electromagnetic effect.
Here if ratio of secondary to primary number of turns increases then the effect is also more.
reason:
As the core conductivity increases it allows more flux to pass through it and hence loss of energy is less.
b.
step up: 400, 800 ; 200,400 and 200, 800
step down: 800,400 ; 400,200 and 800, 200
Isolation: 400,400
c.
Decrease the effect of eddy currentsin core material and cool the core and coils.
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