Engineering technicians have many nightmare stories when it comes to on-site troubleshooting. In this instance, I was called to help troubleshoot a Closed Loop (Sensorless Vector) Variable Frequency Drive (VFD) on a production line that was so large, it seemed to go so far down the plant, it never ended. After overcoming the intimidation associated with the sheer size of the line, it became a question of focusing […]
Often times those using a Variable Frequency Drive (VFD) may find themselves needing to connect a higher horsepower VFD to a single phase input power source. Since most higher horsepower VFDs only accept three phase input as a power source, they are left with little options or alternatives. Don’t fret, there is a solution. If you are using a Variable Frequency Drive (VFD) rated for three phase […]
An AC Variable Frequency Drive (VFD) is commonly referred to as an “Inverter”. This is because of the way a VFD works. The following details the inner workings of a VFD: Alternating Current (AC) power is applied to the input of the VFD and feeds a bridge rectifier. The rectifier converts the Alternating Current (AC) voltage into Direct Current (DC) voltage. The Direct […]
When applying a Variable Frequency Drive (VFD) to a new or existing application there are many factors to consider prior to making a firm decision on what type of Variable Frequency Drive (VFD) should be used. If one already has an existing application where VFDs seem to consistently fail, they should look to using a different VFD type for potential success. For a new VFD application one […]
Variable Frequency Drives (VFDs) are electronic devices used to control the speed of an Alternating Current Motor (AC Motor). Variable Frequency Drives (VFDs) are also commonly known as adjustable frequency drives, adjustable speed drives, AC drives and inverters. Variable Frequency Drives (VFDs) have a wide range of application use that include, but are not limited […]
