VFD is shorted for variable frequency drive, it's a electric device to control AC motor speed by adjusting the frequency, it's a kinds of energy saving device, like in pump motor, injection molding machines. There are many manfacturers producing VFD such as Delta, Veichi, Siemens, Hitachi and etc.
Yes because VFD means Volunteer Fire Department and there are many characters in it
You can either use the inbuild timer in VFD or go with secondary timer or a controller like PLC. You may use the below link to learn more on VFD www-dot-smeclabs-dot-com
To reduce the noise generated because of VFD harmonics, line filters have to be used on the line side and load side of the VFD. The specific filters suppress the harmonic frequencies that the VFD generates when the SCR's are rapidly turning off and on.
Vfd is used for maintaing the pressure of whole chiller line.
NO
Yes
Yes, he is.
vfd
vfd
The VFD is real and it stands for. Volunteer Fire Department. At least that is what it says on Wikipedia!
Traditionally dampers are used to control the quantity of air entering the boiler. If we use VFD for FD fan, we can control the quantity of air be changing speed of fan using VFD. This will save energy.
If the motor is connected to a VFD the conductors of the motor need not be changed. The phase reversal can be done with the VFD's internal circuitry.