Featured post

What Is Fluid and Its Properties?

Science helps to understand things in a better way. We know about fluid but science helps to understand different aspects of it in a better ...


Variable Frequency Drive

The frequency converter is also called as variable speed drive or variable frequency drive. 

This drive basically consists of two parts

( 1 ) First part which converter AC to DC and

( 2 ) converts DC into AC.


  • The second part provides variable voltage, variable frequency AC output voltage. 
  • The frequency converter provides variable frequency to the motor to control the speed. 
  • The variable frequency drive only used for starting and stopping the motor if there is no need for speed regulation. 
  • The filter is installed with drive in order to reduce harmonic generation.


  • The rated torque is available at low speed. 
  • The starting current is reduced which is 0.5 to 1.0 times normal current. It is usually 1.5 times normal current. 
  • Soft stop - When water pump stop , there is water hammering in the pipe systems during direct stop. 
  • The variable frequency drive provides soft stop.  The soft stop function also provides long life to belt.

You may also like :

Hydrogen cooling of alternators

Permanent Magnet & Electromagnet

Power & Energy

Potential & Potential Difference



No comments:

Post a Comment