Variable Frequency drive,Working Principle,Why we used VFD,types of VFD,Components of VFD System,VFD as a Soft Start,VFD MotorCommutation,Design of VFD for Motor
Introduction Variable frequency drive (VFD) or adjustable frequency drive(AFD),Variable -voltage/Variable frequency(VVF) drive,Variable speed drive(VSD),AC drive,Micro drive or inverter derive is a type of adjustable speed drive used in electro-mechanical drive system to control AC motor speed and torque by varying motor input frequency and voltage. Working Of VFD The first stage of a variable frequency AC drive or VFD is the converter.The converter is comprised of six diodes used in plumbing system.They allow current to flow in only one direction the direction shown by the arrow in the diode symbol..For example whenever A Phase voltage (voltage is similar to pressure in plumbing system) is more positive than B or C phase voltages, then the B-phase diode will open and allow current to flow .When B -phase become more positive than A -phase then the B-...