High-performance variable frequency drives (VFD) enable speed control for three-phase AC motors such as those in conveyors, fans, pumps, HVAC and material handling. Available in sizes up to 300hp offer advanced features such as STO, closed-loop vector control and a built-in logic controller.
High-performance AC drives are top-of-the-line drives that are usually specified when a high degree of precision in speed control is required, when full torque is needed through the speed range of the motor (full torque available at very low or zero speeds), or if a torque control mode is required (controlling and maintaining torque as opposed to speed). These drives carry a higher price tag but provide these added benefits:
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WEG CFW500 series drives are high-performance AC variable frequency drives that support closed-loop flux vector speed control as well as torque control modes and can operate both AC Induction motors and permanent magnet AC motors. These models are offered in an IP66/NEMA 4X enclosure up to 20hp and up to 150hp in an IP20 enclosure.
The DURApulse GS4 series of AC drives includes many of the same standard features as our other GS drives including dynamic braking, PID, removable keypad, and much more: