Before the Declaration of Independence. Even after the initial battles in the Revolutionary War broke out, few colonists desired complete independence from Great Britain, and those who didâlike John Adamsâ were considered radical.
A variable-frequency drive is a device used in a drive system consisting of the following three main sub-systems: AC motor, main drive controller assembly, and drive/operator interface.ariable-frequency drives are also categorized by the following load torque and power characteristics: 1  Variable torque, such as in centrifugal fan, pump, and blower applications. 2  Constant torque, such as in conveyor and positive-displacement pump applications.
When looking for a variable frequency drive for your pumping application; Think Quality, Think Delivery, Think Price! PriceÂ® Pump is now offering two new variable frequency drives (VFD) that offer precision control and fast response that exceeds the performance of conventional 'general-purpose' AC inverters. These drives meet the requirements of OEMs, end users, installation companies and panel builders.