My friend has
faced this
question! I
don't know
clearly. So
please anyone
give me the
correct and
short answer to
this question?
What is variable
frequency drive?
Types, what is
star to delta?
Why this
arrangement
necessary?
Answer Posted / vasu
VFD are used to make the motor to run in desired speed. By
variying the input supply frequency we can vary the speed of
the motor. some other types are VVFD - Variable voltage and
frequency drive, Vector drive.
| Is This Answer Correct ? | 4 Yes | 0 No |
Post New Answer View All Answers
Why upper weighing limit of electronics balance is 90% of the total weighing capacity?
what is dc moter.
What is defferent betwen ESP &PCP PUMP .HOW IT IS WORK?
in sulfur process what is material of impulse line we use to connect with transmitter ? and does teflon affected by sulfur?
Please any one can provide latest aptitude test,technical test and interview questions for tata consulting engineering (TCE) i need it asap thanks in advance
what is the reason while warning lamp is on while the engine is cranking?
for oil & gas industries which zone is normally preferred? why? give its example?
plz you help about Que paper of mahagenco previous your,any model paper relad to it{maharastra power genration}
when the instrument tapping on pipe line is located below and transmitter is located above the tapping point for liquid service transmitter, what should we do, is there any additional drain valve is required??
please tell no. & add. of consultancy who recruit me in power plant as instrumen engg. present i m working in power plant as ass.t instrument engg. thanku mahesh 09226562826
What are the uses of orifice plates?
How to do gas analysers calibration in AUTO and Manually by using zero and span gas?
what is performance test.need defination
WHAT IS MEANT BY PROJECT MANAGEMENT STRATEGIES IN INSTRUMENTATION?
model question paper of instrumentation for Jindal GET 2010.plz reply sudhanshukumar08@yahoo.com