When you are in the process of selecting an AC drive for your application, then you come to the right place. Here we are going to identify the steps involved to help you select the right one you need.
Identify the motor voltage, horsepower, and full-load amperage
You can find these specifications in the motor’s nameplate. Just keep in mind that most motors can be corrected for various voltages and usually have different amperages listed on their nameplate. Ask the manufacturer if you are confused.
Pick your control mode
The next step is to pick the control mode that suits your application. You may also find this in the motor specification. For instance, if your application has something to do with pumps or fans, a volts/hertz control mode might be a good option. For applications that need about a hundred percent torque, sensor less vector or FOC control mode may be the most suitable option.
Know the I/O requirements of your AC drive
In order for the AC drive to interface with other devices like selector switches or pushbuttons, digital inputs can be used. They are often used to serve several functions like forward/release, preset speed selection, fault reset and more. Conversely, digital outputs are also used to connect the drive to other devices like alarms and auxiliary relays. Whatever it is your application requires, just be sure to determine it beforehand.
Know the location of keypad and communications requirements
In case your AC drive will be installed in a place that is not easily accessible for the operator, then remote mounting is needed that may call for more cabling and other accessories. You have to determine where the keypad must be located.
More importantly, you also have to know the communications requirements for your drive application. If it requires a communication interface to connect with other devices in your facility, then this device will most likely replace the need for digital or analog I/O. It can also help monitor the status of your drive’s parameters such as the speed and fault.
Decide on the enclosure
Finally, the enclosure is also very important to provide complete protection to your drive. Some are open while others can be mounted in an enclosure or drive room. You need to think about the space you have for the drive to decide on the right enclosure.
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