Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / debashisdb
Most Industrial drives have variable speed application
(fans, pumps) where the initial speed of the load is
normally very low and increases gradually.
The induction motor used for the purpose will have
specified starting torque & speed as per the torque-speed
curve of the motor. The speed is normally very high
compared to the load requirements at start. So by vfd it is
possible to control the speed of the motor according to the
loading requirements.
Since Power is proportional to cube of speed, control of
speed saves a lot of power requirement.
| Is This Answer Correct ? | 13 Yes | 2 No |
Post New Answer View All Answers
What is the difference between hot and cold loop testing?
1. A bomber drops a bomb from an aircraft flying at 2000 km/hr. at an altitude of 7km. The speed at which the bomb will strike the earth would be
Zone of protection and tripping scheme of arc protection relay.
How can we measure earthing resistance test (Earth meggar) of Transformer neutral pit while in live condition?.
how i can calculate the size for fire cable
Why increase in current leads to increase in conductor temperature?
Work done in a free expansion process is
explain all the classes with example
How do we calculate the resistance per metre of single core aluminium stranded cable 19*3.25mm sheathed in pvc,at 15 deg C temperature?
to vary valtage from 0 - max a variac is necessary . so how to design for high power applications nearly about 200KW power
what are your career plans upon completion of the programme and the relevance of recity generation to your professional development?
75 kw motor take 45 amp in no load delta in star 10 amp but in load it will take 160 amp but IR velue of winding above 500 at 1kw ph to earth and ph to ph. what problem it should be?
From reading, Under voltage relay used also as phase sequence relay now, Why I use under voltage and phase sequence relay in the same circuit (ATS)?
Why 30kw 40 hp 4 pole 3ph induction motor over heated?any steps on reduction in heat?
what is the working principle of energy saver control panel. please give the complete calculation & theory.
