Transformers Flashcards
1
Q
Left Hand Motor Rule?
A
Thumb = Motion
First Finger = Field
Second Finger = Current
2
Q
Right Hand Generator Rule?
A
Thumb = Motion
First Finger = Field
Second Finger = EMF
3
Q
Faraday’s Law?
A
e = N*Dphi/Dt
Measured in Volts
4
Q
Lenz’s Law?
A
e = Blv
Measured in Volts
5
Q
Relationship between two emfs for ideal transformer?
A
E1/N1 = E2/N2
N1I1 = N2I2
6
Q
Non-ideal transformer, what is the power loss formula?
A
Iron losses (eddy and hysteresis losses) - The windings of the transformer have some resistance, known as copper losses.
Ploss = I^2*R
7
Q
What is the efficiency formula?
A
n = Pout/ Pout+Ploss
n = Pout/ Pin
