What is an AC Motor Drive? How Does It Work?

What is an AC Motor Drive? How Does It Work?

AC motor drives, which are electronic drive circuits that provide speed control, are frequently used in industrial areas. AC motor drives, which are known by many different names such as speed control drive, frequency drive, AC drive and AC inverter in the sector, have become indispensable for automation panels, especially with the developing technology. As ILX Engineering, we will discuss AC motor speed control drives in the blog post we prepared this week. Throughout the article, we will give answers to questions such as "What is an AC motor drive?", "How do AC motor drives work?" And "What is an AC motor drive for?". We hope it will be a useful blog post for those who want to get information about AC drive inverter types, we wish good readings. What is AC Motor Drive? It can be defined as electrical equipment that changes and balances the speed and frequency of asynchronous motors. Asynchronously operating motors are electronic drive circuits that enable speed control by changing the frequency and voltage of the supply source.How to Connect AC Motor Driver AC motor driver connection diagram is one of the most curious details about these electrical equipment. The connection of these drivers can be explained with an example. A device whose input voltage is one phase 220V 50 Hz, output voltage becomes three phase 220V 50 Hz. Motors with 220V / Y 380V 50 Hz on the label of the device are operated in a triangle. The star bridge is dismantled and triangle bridges are made. You can examine the AC motor drive connection on the image below.

How Does Frequency Drive Work?

The frequency drivers, which enable the motors to operate at different speeds, have a screen on them so that the necessary speed commands can be given and parameter settings can be made. The speed of AC motors is inversely proportional to the number of stator poles and directly proportional to the frequency of the supply voltage. Therefore, in order to change the speed of AC motors, it is necessary to change the frequency or the number of stator poles. However, since the number of stator poles is fixed, there is no such thing as changing during operation. In this case, the frequency of the supply voltage is changed to change the speed of the motor. When it is desired to reduce the motor speed, the frequency is decreased; If it is desired to increase the frequency, the frequency is increased. AC motor drive working principle can be summarized in this way.

What Does an AC Motor Drive Do?

AC motor drives have many benefits in the areas where they are used. We can list the main benefits of AC drives as follows:

Speed ​​adjustment

System stress and energy saving

Process control

Reduced noise level in low load situations

Possibility to use high speed compressor

Protection of motors against excessive currents and voltages

Providing different speed selection for each study

Minimizing the mechanical and electrical stresses that may arise during stops and take-offs

AC Inverter Usage Areas

The main usage areas of AC motor drives can be listed as follows:

Water and wastewater treatment

Paper mills



Drilling platforms

AC Motor Inverter Prices

AC motor drives have many types among themselves. Depending on the types of AC inverters with different features, AC motor drive prices also vary. As ILX Engineering, we have come to the end of the blog post we prepared for AC motor drives. Throughout the article, we have answered questions such as "What are AC motor drives?" And "How does an AC motor drive work?" As ILX Engineering, you can access the AC inverter types we offer for you via the relevant link. You can consult us for the price information of the products you think are suitable for you.


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