Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 29, Problem 4SQ
The closed transition contactor is energized only on transfer from star to delta. How is this accomplished?
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Post-lab Questions
If the diode D3 is damaged (as short) draw the output voltage waveform in
this case.
D1
D2
V1
F1
220Vrms
n 50HZ
T1
0°
220v:40v
D3
D4
transformer
Difine the diodd and explain it’s basing conditions
Determine the voltage across the resistor, the current in the resistor, and the output voltage in figure 1 and figure 2. Plot these waveforms with proper ac cycle phase alignment. 1SR154-400 is a silicon rectifier 1 ampere diode. Indicate the peak values as per calculation.
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