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Figure 2 Coil Circuit and Phasor Diagram | Up
Electrical Science Volume 3 of 4 | Next
CAPACITANCE |
INDUCTANCE
Basic AC Reactive Components
Solution:
1.
Inductive reactance of the coil
XL
2pfL
(2)(3.14)(60)(0.4)
XL
150.7W
2.
Current through the circuit
I
E
XL
115
150.7
I
0.76 amps
3.
Draw a phasor diagram showing the phase relationship between current and
applied voltage.
Phasor diagram showing the current lagging voltage by 90° is drawn in Figure 2b.
Summary
Inductive reactance is summarized below.
Inductive Reactance Summary
Opposition to the flow of alternating current caused by inductance is called
Inductive Reactance (XL).
The formula for calculating XL is:
XL = 2pfL
Current (I) lags applied voltage (E) in a purely inductive circuit by 90° phase
angle.
The phasor diagram shows the applied voltage (E) vector leading (above) the
current (I) vector by the amount of the phase angle differential due to the
relationship between voltage and current in an inductive circuit.
ES-08
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