SHORT REPORT-Experiment-1
FAKULTI KEJURUTERAAN MEKANIKAL
UNIVERSITI TEKNOLOGI MALAYSIA
KAMPUS SKUDAI
JOHOR
SKMM 2921
ELECTRIC LABORATORY
LABORATORY SHORT REPORT
(EXPERIMENT-1)
VOLTAGE AND CURRENT TRANSFORMATION
NAME
:
GROUP / SECTION
:
EXPERIMENT DATE :
1
Electric Lab (SKMM2921), FKM UTM Skudai
SHORT REPORT-Experiment-1
1. RESULTS
a. Calculate the turn ratio, voltage ratio and current ratio of the ideal transformer used for stepup and step-down transformers.
b. Calculate the voltage ratios of step-up transformer with no load in Table 1.
c. Calculate the voltage ratio, current ratio and power ratio of step-up transformer with load in
Table 2.
d. Calculate the voltage ratios of step-down transformer with no load in Table 3.
e. Calculate the voltage ratio, current ratio and power ratio of step-up transformer with load in
Table 4.
Ideal Step-Up Transformer
n1 : 500 turns; n2 : 1000 turns
From theoretical calculations:
= n2 / n 1
= ……….
Voltage Ratio = V2 / V1
= ….……
Current Ratio = I2 / I1
=………..
Turn Ratio
Power Ratio
= (V2 / V1 ).( I2 / I1 ) =………..
Ideal Step-Up Transformer
n1 : 1000 turns; n2 : 500 turns
From theoretical calculations:
= n2 / n 1
= ……….
Voltage Ratio = V2 / V1
= ….……
Current Ratio = I2 / I1
=………..
Turn Ratio
Power Ratio
= (V2 / V1 ).( I2 / I1 ) =………..
Table 1. Step-Up Transformer with no load
Voltage Level
V1 [Vac]
V2 [Vac]
Voltage Ratio
(V1/V2)
3Vac
6Vac
9Vac
12Vac
2
Electric Lab (SKMM2921), FKM UTM Skudai
SHORT REPORT-Experiment-1
Table 2. Step-Up Transformer with load
a. Resistor Load = 10 k Ohm
Voltage
V1
I1
V2
I2
Level [Vac] [Aac] [Vac] [Aac]
Voltage
Ratio
(V2 / V1)
Current
Ratio
(I2 / I1)
Power Efficiency
(V2 I2 / V1 I1)
Voltage
Ratio
(V2 / V1)
Current
Ratio
(I2 / I1)
Power Efficiency
(V2 I2 / V1 I1)
Voltage
Ratio
(V2 / V1)
Current
Ratio
(I2 / I1)
Power Efficiency
(V2 I2 / V1 I1)
3Vac
6Vac
9Vac
12Vac
b. Resistor Load = 1 k Ohm
Voltage
V1
I1
V2
I2
Level [Vac] [Aac] [Vac] [Aac]
3Vac
6Vac
9Vac
12Vac
c. Resistor Load = 100 Ohm
Voltage
V1
I1
V2
I2
Level [Vac] [Aac] [Vac] [Aac]
3Vac
6Vac
9Vac
12Vac
Table 3. Step-Down Transformer with no load
Voltage Level
V1 [Vac]
V2 [Vac]
Voltage Ratio
(V1/V2)
3Vac
6Vac
9Vac
12Vac
3
Electric Lab (SKMM2921), FKM UTM Skudai
SHORT REPORT-Experiment-1
Table 4. Step-Down Transformer with load
a. Resistor Load = 10 k Ohm
Voltage
V1
I1
V2
I2
Level [Vac] [Aac] [Vac] [Aac]
Voltage
Ratio
(V2 / V1)
Current
Ratio
(I2 / I1)
Power Efficiency
(V2 I2 / V1 I1)
Voltage
Ratio
(V2 / V1)
Current
Ratio
(I2 / I1)
Power Efficiency
(V2 I2 / V1 I1)
Voltage
Ratio
(V2 / V1)
Current
Ratio
(I2 / I1)
Power Efficiency
(V2 I2 / V1 I1)
3Vac
6Vac
9Vac
12Vac
b. Resistor Load = 1 k Ohm
Voltage
V1
I1
V2
I2
Level [Vac] [Aac] [Vac] [Aac]
3Vac
6Vac
9Vac
12Vac
c. Resistor Load = 100 Ohm
Voltage
V1
I1
V2
I2
Level [Vac] [Aac] [Vac] [Aac]
3Vac
6Vac
9Vac
12Vac
4
Electric Lab (SKMM2921), FKM UTM Skudai
SHORT REPORT-Experiment-1
2. ANALYSIS AND DISCUSSION
(Please use separate sheet of papers)
(Please plot graph using Excel)
a. Plot Graph voltage ratio of step-up transformer with no load and load as a function of voltage
input for both ideal and experimental transformer. Label as Figure 1.
b. Plot Graph Current ratio of step-up transformer with load as a function of voltage input for
both ideal and experimental transformer. Label as Figure 2.
c. Plot Graph power ratio of step-up transformer with load as a function of voltage input for
both ideal and experimental transformer. Label as Figure 3.
d. Plot Graph voltage ratio of step-up transformer with no load and load as a function of voltage
input for both ideal and experimental transformer. Label as Figure 4.
e. Plot Graph Current ratio of step-up transformer with load as a function of voltage input for
both ideal and experimental transformer. Label as Figure 5.
f. Plot Graph power ratio of step-up transformer with load as a function of voltage input for
both ideal and experimental transformer. Label as Figure 6.
g. From each plotted graph, state your observations and discuss.
h. Why the results are different with the ideal transformer?
3. CONCLUSION
(Please use separate sheet of paper/s)
4. REFERENCE
(Please use separate sheet of paper)
5
Electric Lab (SKMM2921), FKM UTM Skudai