Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / sandeep vazhoor
VVVF drive(also called VVVF Inverter) is a power electronic
controller used to control the speed of 3 phase AC Motors
(synchronous or induction) by varying the frequency and
voltage applied to the motor terminals. Voltage and
frequency relationship is decided based on the motor name
plate data and the load characteristics.
Advantages of VVVF Drives are –
a) Stepless speed can be achieved which is required in
process control.
b) Energy Saving.
c) Improvement in productivity.
d) Process improvement and better quality of the product.
| Is This Answer Correct ? | 29 Yes | 4 No |
Post New Answer View All Answers
Where is servomechanism used?
what is the maximum permissible limit value of leakage current and leakage counter reading to replace lightining arrester?
what is the formula for hv test for cable and circuit breaker..????
The windings of a transformer are divided into several coils, because?
work of choke in florocent tube circuit ?
Explain cos(theta) and Sin(theta)
what are the stresses in circuit breakers ?
defination of lines
plz send me the syllabus or any sample paper for engineer trainee recruitment if any,on ravinder911@yahoo.com
along with technical test papers
How to know the following data of synchronous generator 1. D-Axis Unsaturated Reactance 2. D-Axis Unsaturated Transient Reactance 3. D-Axis Unsaturated Sub - Transient Reactance
Dear Respected sir how to test ABB REX521 protection relay by relay tester.
Either the Armoured Earthing strip of HT 3 core cable have to pass through CB CT or not , why ???
What are the protection required for Transformer, motor, Line, Generator, capacitor, that all i have to refer which standard?(Like Transformer detail IS 2026)
What is q factor?
