Drives

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The Right Variable Frequency Drive for Your Application A variable frequency drive controls motor speed and torque by adjusting the frequency and voltage supplied to an AC motor — cutting energy costs on fans and pumps, protecting driveline components from start-up shock, and holding process speed steady under changing load. Choosing the right one comes down to a handful of specifications: motor horsepower and full load amps, input voltage and phase, whether the load is variable or constant torque, enclosure rating for the environment, and the communication protocol your PLC expects. Industrial Automation Co. stocks replacement VFDs across every major control method, from economical V/Hz drives for variable-torque loads to closed-loop flux vector and Direct Torque Control drives for applications that need full torque at zero speed. We carry current production models alongside obsolete and legacy units, so a discontinued drive doesn't have to mean a panel redesign. Search by brand or part number to find your exact drive, or contact our team for help cross-referencing a failed unit to a suitable equivalent.