A variable frequency drive is a device that is used to manage the AC induction motor’s speed. VFDs are typically utilized when motors are not required to run at full speeds. They can help improve the efficiency of motors and also save energy.
VFDs use frequency as well as voltage to effectively manage a motor’s RPMs. A capacitor alongside a converter is used to manage and also convert AC & DC power. There are numerous benefits of VFDs in multiple industries which makes them worth the investment. In many cases, a single phase VFD can be enough. However, it is best to consider the following things before selecting a specific option.
- Compatibility With Motor
When choosing a VFD, the first yet one of the most important things to do is ensure compatibility with the motor. Start by identifying the type of motor you are using. It can be a synchronous motor, an induction motor, or some other one.
The next step is to ensure that the VFD can easily handle the operating current and voltage of the motor. After that check and match the power output of VFD with the requirements of the motor.
- Installation Location
It is important to consider the location where you would like to install the VFD. This is because selecting an unsuitable drive for the environment will mean that you won’t be able to reap all the benefits.
Start by considering whether you want to use VFD indoors or outdoors. In case the answer is indoors, you would want to check the humidity levels, air quality, and temperature. If the air quality is not so great, the temperature and you work with toxic chemicals, it might be better to choose a drive that is suitable for that kind of environment.
As for the outdoors, it is important to consider the type of elements VFD will be exposed to and whether or not it will be under direct sunlight. Even if you just want a single phase VFD, it is important to consider the installation location.
- Type of Motor
Keep in mind that not all types of motors work well with all types of VFD. In fact, there are some motors that might not even need a drive. The majority of induction motors are known to work well with the VFD.
VFDs are almost necessary to use with permanent magnet synchronous motors (PMSMs) because these types of motors cannot start on their own. There are a few particular VFDs that are designed specifically keeping PMSMs in mind and contain some additional features that help enhance their operation.
To ensure the best operation, particularly in an industrial setting, it is recommended to invest in a 3 phase VFD.
- Examine Power Supply
Thoroughly inspect the characteristics of your specific power supply. It will play a major role in when choosing a VFD. Firstly, check if you have three-phase input power or just single-phase. In case it’s just single, you would be better off investing in a single phase VFD. After phase type, ensure your preferred VFD matches with the supply voltage.
- Energy Efficiency
Using VFDs has many pros but one of the primary benefits is the energy savings. However, you should still make an effort for a drive with energy optimization features such as automatic energy optimization. Choose the one with higher efficiency to minimize energy waste and decrease operational costs.
Conclusion
Picking a suitable variable frequency drive is a very crucial decision especially for guaranteeing reliability, confirming optimal performance and energy savings. Considering the things mentioned in this article is recommended to ensure you choose the right VFD.