What is a variable frequency drive?

 

Variable Frequency Drive Market
Variable Frequency Drive Market

A variable frequency drive (VFD) is a type of motor controller that controls the frequency and voltage of an electric motor's power supply. The VFD can also control the motor's ramp-up and ramp-down during start and stop, respectively.

Despite the fact that the drive regulates the frequency and voltage of the power supplied to the motor, we commonly refer to it as speed control because the outcome is a change in motor speed.

The global variable frequency drive (VFD) market is estimated to be valued at US$ 18,878.1 million in 2021 and is expected to exhibit a CAGR of 8.4% over the forecast period (2021-2028).

There are many reasons why we may want to adjust this motor speed.

For example, to

Conserve energy and boost system performance.

In hybridization applications, convert power.

Match the drive's speed to the process's requirements.

Match a drive's torque or power to the process needs.

Enhance your working atmosphere.

Reduced noise levels, such as from fans and pumps

Machines' lifetimes can be extended by reducing mechanical stress.

Reduce peak usage to avoid peak-demand pricing and the size of the required motor.

Furthermore, today's drives include networking and diagnostic features, allowing for higher performance and productivity. So, in every motor-driven system, energy savings, intelligent motor control, and a reduction in peak-current drawn are three excellent reasons to use a VFD as the controller.

VFDs are most commonly used to control fans, pumps, and compressors, with these applications accounting for 75% of all drives in use worldwide. Other, less sophisticated types of motor controllers include soft starters and across-the-line contactors. A soft starter is a solid-state device that allows an electric motor to ramp up to full speed gradually during startup. An across-the-line contactor is a form of motor controller that supplies an electric motor with the entire line voltage.

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