How to Choose the Best Variable Frequency Drive
At a time when energy costs have been extremely high, people are looking for more energy efficient solutions. If you consult a technician or an engineer, most of them are going to advise you to use a variable frequency drive. While a variable frequency drive is a relatively simple device, finding the right one is not as easy. Variable frequency drives are available in many different sizes and designs all with different purposes.
Horsepower does one of the most common factors that most people use to make a decision when selecting a variable frequency drive. However, there are many other factors you need to consider since not all variable frequency drives are equal. This way, you can be sure that the variable frequency drive you choose is suitable for your intended purpose. In this guide, you will find all the key factors you should consider when buying a variable frequency drive to avoid making any mistakes.
You should only start looking for a suitable variable frequency drive once you know the horsepower of the load. This, however, does not change the fact that it is essential to size a variable frequency drive with the full load amps of the motors upon which you intend to use the variable frequency drive. Without proper knowledge of your load, it is going to be difficult for you to find a variable frequency drive that can deliver to your needs.
You also need to look at the voltage before you make any decision when choosing a variable frequency drive. It is important that you match the voltage of the variable frequency drive and moto to the voltage you currently have on site for a three-phase input which makes it relatively easy. You should note that the classifications for low-voltage application vary from one place to another. A medium voltage that other applications may require the input of application specialists or engineers to determine the requirements. If you are dealing with a single phase input, you may need to consider several things.
The speed range of the motor you are working with should also play a part in your decision when choosing a variable frequency drive. Any motor should run at least twenty percent of the maximum allowed speed specified by the manufacturer. Running a motor at a lower speed may cause overheating especially if you do not use any auxiliary motor cooling. It is also important that you remain careful when over speeding a motor. Before you over speed a motor, you should check with the manufacturer to determine the speed range that is covered within the warranty.