Frequency converters: advantages and disadvantages

By Jacob Andersen

Adm. Manager – proconsult.as

31 May 2024

frequency converter advantages and disadvantages

Frequency converters through time

Frequency converters enable the control of electric motors with variable speeds. These devices are used in a wide range of applications from industrial production to climate control systems. However, like any other technology, frequency converters have their advantages and disadvantages.

The first speed controls worked via regulation of DC motors. They had the advantage that the motor could be started up under load, which the first frequency converters could not do. However, with advanced control of the effect electronics, it has succeeded.

Frequency converters are used today in a wide variety of applications, from small converters of a few hundred watts to several hundred kW. Likewise, frequency converters have also become physically smaller in line with development.

Advantages of frequency converters

Frequency converters have a number of advantages that have made them indispensable in modern industry:

Energy savings

One of the most significant advantages of frequency converters is their ability to regulate the speed of motors as needed.

This significantly reduces energy consumption compared to traditional on/off control methods – especially when the load varies.

Increased control and precision

Frequency converters allow operators to adjust motor speeds precisely as needed. This results in more precise process control and improved product quality.

frequency converter advantages and disadvantages

Reduction of mechanical stress

By soft-starting motors and then gradually accelerating them to operating speed, variable frequency drives reduce mechanical stress and wear on the equipment, resulting in longer life and fewer breakdowns.

Disadvantages of frequency converters

Electrical noise

Despite their many advantages, there are also some disadvantages of frequency converters that companies should be aware of. In addition to the fact that it is of course an expensive link, you must be aware of electrical noise, which can disturb other electrical devices and lead to operational disturbances. This often requires additional shielding and filtering to resolve.

In our view, frequency converters do not have many disadvantages. Their advantages outweigh the disadvantages in many ways.

Frequency converters in industrial processes

All in all, frequency converters are essential in modern industrial processes and when it comes to energy efficiency. Their ability to regulate motor speeds and increase precision in processes has significant advantages. It can therefore be a great advantage for modern companies to include frequency converters in their production.

Are you interested in buying a frequency converter or hear more about the advantages and disadvantages, contact PRO-CONSULT.

PRO-CONSULT are specialists in repairing and selling industrial electronics. We have over 35 years of experience with electronics, and we can repair pretty much anything we get through the door. 

We are divided into three departments in each Viby Zealand, Vejle and Padborg.