Inductive Transients. Introduction. Inductor Voltage. Immediately after the switch is closed, the current is still zero, (since it cannot change instantaneously). Example. E=20 V, Determine i , and V L at the instant switch is closed. Current Buildup Transients. Applying KVL:. - PowerPoint PPT Presentation
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INDUCTIVE TRANSIENTS
Introduction
Inductor Voltage
Immediately after the switch is closed, the current is still zero, (since it cannot change instantaneously).
Example
E=20 V, Determine i, and VL at the instant switch is closed.
Current Buildup Transients
Applying KVL:
Circuit Voltages
Example
E=50 V, R= 10 ohm, L= 2H
Example
VL for above example:
Time Constant
Interrupting current in an inductive circuit
Interrupting via Resistor
Inductor Equivalent at Switching
De-energizing Transients
KVL:
VL+ VR1+VR2=0
Example
Assume steady state for circuit. E=120 V, R1=30 ohm, R2=600 ohm, L=126 m H