Variable Frequency drive commonly known as VFD is widely used for speed control. VFDs have been an efficient method of controlling speed of electric motors and hence are also known as variable speed drives. These are required for carrying out VFD automation for various types of electric motors.
In order to understand a VFD, a general understanding of Electric motor is essential. An electric motor rotates its rotor as per the parameters achieved by the voltage and frequency of the electric power supplied to the motor. Internationally there are few different electric system voltage such as 400V (3 Phase), 380 V (3 phase) etc. and 50 or 60 Hertz frequency. By varying the voltage and/or frequency the performance of the motor including the speed varies. It is generally difficult to change the voltage or frequency without ancillary equipment. A variable frequency drive is used to achieve the voltage and frequency variations efficiently. Normal electric power supply is supplied to the VFD and the output of the VFD is fed to the electric motor. There are controls available in the VFD which can be adjusted to control the speed of the motor.
The major components for controlling an AC motor are as explained below:
We carry out supply and installation of Variable Frequency Drives of major manufacturers. VFD Automation consists of the correct VFD and its control systems. We need the details of your motor including, voltage, frequency, capacity (kW), application, etc. to decide the required VFD. Accordingly, the selected VFD will be installed by us including electrical cabling to the motor from the power supply through the VFD.
Even though there are numerous manufacturers and models of VFDs, the basic selection process is the same for all of them. In order to select the right VFD, you’ll need the following details
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