Give two basic sprrd control scheme of DC shunt motor.
Answer Posted / sindhu
1. by using flux control method:in this method a rheostat is connected across the field wdg to control the field current.so by changing the current the flux produced by the field wdg can be changed, and since speed is inversely proportional to flux speed can be controlled
2.armature control method:
in this method a rheostat is connected across armature wdg.by varying the resistance the value of resistive drop(IaRa)can be varied,and since speed is directly propotional to Eb-IaRa the speed can be controlled
Is This Answer Correct ? | 8 Yes | 0 No |
Post New Answer View All Answers
What should be setting for alarm,tripping and cooling fan on for power transformer's oil temp. and winding temp. indicator?
how calculate the electrical load for industry and office
What is lifting power for 1 wb/m2 and 1 A magnet?
Why is a plain induction motor unsuitable for wide speed control?
what is the formula to calculate voltage drop/loss on 66KV Transmission Line?
If I have 3 essential main switch board and 3 incoming electricity ,but only 1 genset running is that possible.
How to calculate the phase to phase clearness of HT /// LT bus bar?????
Graphs of measuring power and speed on dc motor
What is the pro & con of having 11kv & 33kv incoming, and what is the adv & disadv. of converting from 11kv to 33kv.
checking procedure of capacitor based motors.used in fans etc?
Define average demand?
How many types of colling system it trformers?
use of choke in APFC panels
how many single tension hardware are required on a double circuit transmission tower?
what is dc mator?types of dc motor?losses in dc motor?what is the mechanical,electrical and commercial efficiency of a dc motor?