Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / sbb
VFD is defined as "Variable Frequency Drive". The main
purpose of VFD is to control the speed of the drive for
different applications.
The principle behind that VFD as we know that N=(120F)/P:
Where N=Speed
F=Frequency (Indian Freq. 50 Hz.)
P=Poles of motor.(Constant)
So speed is controlled by varying the poles of frequency,but
poles is constant and it will be designed when motor is
manufactured.but we can change the frequency though
PWM,Cyloconverters and by thyristor controlled circuits.
So for AC, speed control through VFD is by V/F controll.By
controlling Voltage or by Frequency or by both we can
control the speed.
| Is This Answer Correct ? | 4 Yes | 0 No |
Post New Answer View All Answers
What is the operating principle of turbo-generator.
What is the problem of internal failure in ship engine telegraph system norcontrol?
What is the application of Dyn1 and Dyn11 vector group of transformer?
what is the function of impulse relay
what questions are asked in the interview for the post of an electrical maintenance engineer in FMCG companies?
there are cam operated switches - why we call cam operated , What is cam ?
What are the advantages and disadvantages of closed-loop control system?
What is the difference between PLC and Embeded system
what is a types of short circuit and what is a types of distance protection tests
Define gain margin?
how r charge carriers produced
What is DTR erection?
What does the kvar means?
what is R Core Transformer. how it differs from normal transformers. dont search in net and post the answer.
what is the responsibility of C license holder in industry?
