In figure the SCR has a trigger voltage of 0.75 V and a trigger current of 7mA. What input voltage that turns the SCR on? If the holding current is 6 mA, what is the supply voltage that turns if off? To what value must the variable resistor be adjusted in Figure = 0.7 V Vin JUH 1 ΚΩ +15 V 100 2 +30 VO VGT = 0.75 V IGT = 7 MA IH = 6 mA in order to turn the SCR off? Assume IH = 10mA and VAK 1 • Vout 10 ΚΩ 47 ΚΩ R -1.

In figure the SCR has a trigger voltage of 0.75 V and a trigger current of 7mA. What input voltage that turns the SCR on? If the holding current is 6 mA, what is the supply voltage that turns if off? To what value must the variable resistor be adjusted in Figure = 0.7 V Vin JUH 1 ΚΩ +15 V 100 2 +30 VO VGT = 0.75 V IGT = 7 MA IH = 6 mA in order to turn the SCR off? Assume IH = 10mA and VAK 1 • Vout 10 ΚΩ 47 ΚΩ R -1.

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter32: Two-speed, One-winding (consequent Pole) Motor Controllers

Section: Chapter Questions

Problem 6SQ: Describe the operation of Figure 325 (B) by adding jumper wire A to the original circuit.

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Concept explainers

Single Phase AC Circuit

Alternating Current (AC) is a type of electric power in which the electric current changes, both in magnitude and direction, at regular intervals. This AC Circuits can deliver power in either a Single Phase system or a Three Phase system.

Question

In figure
the SCR has a
trigger voltage of 0.75 V and a
trigger current of 7mA. What
input voltage that turns the
SCR on? If the holding current
is 6 mA, what is the supply
voltage that turns if off?
To what value must the
variable resistor be adjusted in Figure
= 0.7 V
Vin
JUH
1 KS2
+15 V
100 2
+30 VO
VGT = 0.75 V
IGT = 7 MA
IH= 6 mA
in order to turn the SCR off? Assume /H= 10mA and VAK
www
I
10 ΚΩ
ww
O V₂ out
4.7 ΚΩ
R

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