NEMA 4X rated variable frequency drives (VFD) enable speed control for 3-phase AC motors such as those in conveyors and pumps, and are suitable for washdown-duty applications. They offer V/Hz, sensorless vector or field oriented vector control up to 30hp.
The NEMA 4X environmental rating is given to drive enclosures that are washdown duty-rated and built to withstand a harsh environment. Food and beverage processing and water treatment facilities (both indoors and outdoors) are examples of harsh environments where the equipment will be subject to repeated high-pressure washdowns.
The NEMA 4X enclosure also allows you to mount the VFD directly to a machine, outside of an electrical panel. This can eliminate long runs of expensive VFD cable for motor wiring, reduce the need for external VFD output filters and in some cases simply provide a convenient, self-contained motor control at the machine or conveyor with an optional OSHA certified lock-out/tag-out disconnect.
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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.
Rated for washdown applications and suitable for use in direct sunlight
The ACN series of NEMA 4X sensorless vector AC drives have features normally only found on more expensive drives, in a NEMA 4X enclosure and at a great price. These drives offer an advanced remote keypad, Ethernet option cards so the drive can communicate over Modbus TCP and EtherNet/IP, and the option to configure and program using the free, user-friendly VFD Suite software. ACNxx series drives support 4 control modes which include V/Hz, slip compensation, sensorless vector and torque control.
The DURApulse GS20X new generation high performance vector control drives provide many standard and advanced functions - all in a compact unit that has been reduced 40% in size. The NEMA 4X version provides service in the harshest of environments and offers many great features including dynamic braking, single-phase input capability (ALL 230VAC drives can be supplied single-phase), a built-in PLC, and optional EtherNet/IP and ModbusTCP communication. The drive supports up to four (4) independent IM motor parameter sets or supports control of a single AC PM motor. DURApulse GS20X AC drives offer several different speed control modes: standard V/Hz with pulse input feedback, sensorless vector (SVC) for Induction Motors (IM) and Permanent Motors (PM), and ultra-precise Field Oriented Vector control (FOC) for maximum open loop speed regulation control.