Wolong Highlights Advanced Medium Voltage VFD for Demanding Industrial Applications

Built on a proven cascaded H-Bridge topology utilizing an IGBT-based multi-level voltage source inverter, these drives produce low-distortion output that eliminates the need for filters and can control both legacy and modern motors. The topology has been engineered to exceed the capabilities of traditional two or three-level inverters and is significantly superior to current source inverter designs. In addition to delivering exceptional control, the Medium Voltage Variable Frequency Drives provide high system reliability through power cell redundancy and neutral rebalancing, allowing continued operation even if a power module fails. The modular design enables the rapid swap-out of power modules, further minimizing downtime.

At the foundation of these drives is a best-in-class, all-copper pulse phase shift transformer, offered as standard starting with models at 1000 horsepower. This transformer reduces harmonics to the local grid well beyond the requirements of IEEE 519 and most utility codes, ensuring low distortion and improved system compatibility. With industry-leading power density, Wolong Electric America has optimized system footprint while employing a modular drawer-style structure for easier maintenance and service access.

The drives are engineered to handle a broad range of industrial applications, with a 4160V capacity spanning from 1000 to 5500 horsepower and 130 to 635 amps. Input voltage tolerance is designed at 4160V ±10%, with optional configurations from 3.3kV to 13.8kV, and input frequency at 50 or 60Hz ±5%. This versatility makes them suitable for critical equipment such as fans, pumps, compressors, blowers, and conveyors. A modular design cell architecture ensures fast maintenance, while an innovative ventilation system and redundant fans keep power elements cool, enhancing longevity and maintaining high system reliability.

User interaction is streamlined through the Wolong drive interface, which allows intuitive monitoring of operational status and fault alarms. Operators can conveniently access all drive parameters, view fault records, and integrate the system into existing site control platforms using the most common communication interfaces.

The Medium Voltage Variable Frequency Drives are UL-certified, meeting all U.S. market requirements both for the complete VFD unit and Wolong Electric America’s proprietary power cells. The drives' development and performance are backed by more than 25 years of experience in designing, manufacturing, and servicing a global installed base of medium voltage power electronics, including VFDs, soft-starters, SVGs, and other advanced MV equipment. Wolong Electric America’s Medium Voltage Variable Frequency Drives are in stock and ready to ship, ensuring customers can achieve rapid deployment for critical projects without long lead times.

With its combination of cutting-edge engineering, extensive application range, and proven reliability, and with units in stock ready for immediate shipment, Wolong Electric America’s Medium Voltage Variable Frequency Drives set a new benchmark for performance in the world’s most demanding industrial environments.