Question 91-1 - What characterizes an ideal transformer?
Question 91-2 -
What are the main losses that
Question 91-3 - Why is the coupling coefficient in an ideal transformer considered to be unity?
Question 91-4 - How is the transformation ratio of a transformer defined?
Question 91-5 -
If a transformer has
Question 91-6 - What is the equation that expresses the relationship between primary and secondary voltages?
Question 91-7 - In an ideal transformer, what is the relationship between input power and output power?
Question 91-8 - What does it mean to reflect an impedance back and forth across a transformer?
Question 91-9 - How do you calculate the reflected impedance from the secondary to the primary?
Question 91-10 - How do you calculate the reflected impedance from the primary to the secondary?
Question 91-11 - What type of electrical current must be applied to the transformer primary for it to function properly?
Question 91-12 - What would happen if we applied direct current (DC) to a transformer?
Solution of the Questionnaire
Response 91-1
An ideal transformer has no energy losses, that is, there are no losses in iron or copper, there is no self-inductance, and the coupling coefficient between the coils is unity.Response 91-2
Losses in iron (hysteresis and eddy currents) and losses in copper (wire resistance).Response 91-3
Because in an ideal transformer, all the magnetic flux generated in the primary is completely transferred to the secondary.Response 91-4
The transformation ratio (Response 91-5
IfResponse 91-6
The equation that relates the voltages is:Response 91-7
In an ideal transformer, the input power is equal to the output power:Response 91-8
It means calculating the impedance that a circuit presents when observed from the other side of the transformer, facilitating the analysis of the system.Response 91-9
The reflected impedance from the secondary to the primary is given byResponse 91-10
The reflected impedance from the primary to the secondary is given byResponse 91-11
Alternating current (Response 91-12
If we apply direct current (