What is VFD Made Of

A variable frequency drive (VFD) is an electronic device that controls the speed and torque of an electric motor by varying the frequency and voltage of the power supplied to it. VFDs, also known as AC drives or adjustable frequency drives, are used to optimize motor performance, save energy, and improve process control in various applications.

There are many reasons to adjust the speed of a motor.
For example:

Save energy and improve system efficiency
Convert energy in hybrid applications
Adapt drive speed to process requirements
Adapt drive torque or power to process requirements
Improve the working environment
Reduce noise levels, such as from fans and pumps
Reduce mechanical stress in machinery and extend service life
Reduce peak electricity usage, avoid peak electricity price increases, and reduce the size of the motor required

 

What are the main benefits of using a variable frequency drive?

A variable frequency drive adjusts the power supply to match the energy demand of the driven equipment, which is how energy conservation or optimized energy consumption is achieved.
In traditional direct-on-line (DOL) operation, where the motor always runs at full speed regardless of actual demand, a variable frequency drive can significantly reduce energy consumption. With a variable frequency drive, electricity or fuel savings of 40% are typical. The snowball effect means that using a variable frequency drive can also help the system reduce NOx and CO2 emissions.

Today’s VFDs integrate networking and diagnostics for better control and greater productivity. So energy savings, intelligent motor control, and reduced peak currents—these are the benefits of choosing a VFD as your motor drive system controller.

VFDs are most commonly used to control fans, pumps, and compressors, which account for 75% of VFD applications worldwide.

Soft starters and full-line contactors are two of the simpler motor controllers. A soft starter is a solid-state device that provides a gentle, controlled acceleration of a motor from start to full speed.