Explore our elite portfolio of high-efficiency, flameproof, and marine-certified three-phase asynchronous motors designed for global compliance.
Shaanxi Nanfang Motor Technology Co., Ltd is the authorized distributor of Wolong. Wolong Electric Drive Group Co., Ltd was founded in 1984 and successfully listed on the Shanghai Stock Exchange in 2002 (code SH600580).
With over three decades of dynamic industrial evolution, Wolong now commands 3 major manufacturing bases, 39 advanced factories, and 3 global R&D centers. Focused on the manufacture of electric motors and complex control systems, Wolong executes a global brand strategy, maintaining its position as a world leader in R&D, process technologies, advanced manufacturing, and strategic market sales.
LEARN MORE"Our global operational network guarantees that massive infrastructure projects across Europe, the Americas, Asia, and Australia are backed by continuous supply and expert engineering support."
Unrivaled manufacturing scale, technological maturity, and integrated supply chains deliver unmatched technical and financial advantages.
Chinese casting foundries process top-grade grey cast iron (GG25 and GG30/EN-GJL-250). These materials deliver superior tensile strength, thermal conductivity, and structural dampening, ensuring high protection against mechanical deformations and load imbalances in heavy-duty setups.
The concentration of component suppliers, testing facilities, and specialized logistics in industrial clusters enables Chinese manufacturers to compress lead times. Customized shaft designs, multi-voltage windings, and custom mounting flanges are developed, tested, and shipped much faster than Western competitors.
Advanced robotic assembly lines, computerized stator winding centers, and automated VPI facilities reduce unit production costs. These savings are passed down to global buyers, securing maximum performance per dollar spent on industrial drive infrastructure.
The integration of legendary European and North American motor brands under Wolong's technological umbrella.
In 2011, Wolong expanded its technical base by acquiring 97.94% of the Austrian ATB Group, one of Europe's top three motor manufacturers. This acquisition integrated the famous Morley and Laurence Scott brands.
Integrating iconic motor brands into Wolong's unified R&D ecosystem has boosted technical standards across all manufacturing facilities.
In 2015, China's largest explosion-proof motor research and production base, Nanyang Explosion-Proof Group (CNE), joined Wolong. CNE's robust motors are the preferred choice for petrochemicals, hazardous coal mines, and nuclear installations. In 2018, the commercial and industrial division of General Electric (GE) partner-joined, bringing massive technical expertise in heavy-duty industrial electric motor manufacturing.
An in-depth look at the internal components and advanced engineering behind our cast iron motors.
Our rotors feature a robust squirrel-cage design. For standard and medium-sized industrial motors, cast aluminum rotors are manufactured using centrifugal casting or advanced die-casting techniques. This melts pure aluminum directly into the slots of the laminated rotor core, creating a single-piece component that integrates the rotor bars and end rings.
This integrated construction prevents bar breakage during high-torque starting cycles. For larger, high-voltage motors, copper-bar rotors are utilized. By employing state-of-the-art induction welding for end rings and secure bar anchoring, these copper rotors deliver outstanding electrical conductivity and withstand severe thermal shocks.
Stator windings are crafted using double-polyester film combined with reinforced glass cloth wraps and high-grade mica tapes. Our automated processing lines wind and shape the coils before they undergo the crucial Vacuum Pressure Impregnation (VPI) cycle.
The VPI process extracts air and moisture from the stator slot, replacing it with a specialized thermosetting resin. This creates a solid, void-free insulation structure that provides exceptional dielectric strength, resistance to chemical solvents, moisture ingress, and thermal degradation. The system is designed to meet Class F thermal limits while operating within Class B rise margins.
The motor frames are engineered using multi-physics structural and fluid simulation programs. The casting profile provides generous thermal dissipation surfaces, thick structural ribs, and excellent mechanical damping properties.
Constructed from high-tensile gray cast iron, our frames offer exceptional structural rigidity, protecting the stator core and bearings from external mechanical shocks. Dynamic balancing simulations guarantee that the frame eliminates natural resonant frequencies, resulting in low vibration levels, long bearing life, and low acoustic output.
Our cooling solution includes a modern fan cover, integrated air guides, a protective inlet window, and noise attenuating silencer plates. The air inlet is positioned on the side to prevent blockage, maintain ventilation, and reduce air turbulences.
By utilizing sound-dampening materials within the airflow path, overall motor noise is reduced by up to 5 dB(A). The fan system features an IP22/IP55 protective housing, preventing fingers or foreign objects from contacting the moving fan blade.
Our industrial motors are certified by leading global classification societies and standards authorities.
Wolong adheres to a comprehensive global marketing strategy. We have obtained all major product certifications required to enter international markets, ensuring compliance with local grid conditions, safety regulations, and environmental standards.
Nemko/Atex
CSA
CE
CCC
SABS
TESTSAFE
Providing customized drive technologies and motors for major projects around the world.
Explosion-proof motors drive heavy positive displacement pumps, gas compressors, and mixers in Zone 1 and Zone 2 hazardous areas, complying with IECEx, ATEX, and CU-TR safety standards.
Heavy-duty flameproof mine motors drive high-load arm conveyor systems, coal cutters, and ventilation fans, offering reliable protection against methane gas and abrasive coal dust.
DNV-certified marine motors feature specialized shaft seals, C5-M anti-corrosion coatings, and anti-condensation heaters, designed to withstand saltwater exposure and high humidity.
For international procurement managers, acquiring industrial cast iron motors is not just about the initial purchase price. Total Cost of Ownership (TCO) is a critical factor, accounting for energy efficiency, uptime reliability, and routine maintenance costs. Operating a low-efficiency motor can cost far more in electrical power over its lifespan than the initial purchase price.
By sourcing Wolong motors, global enterprises gain access to high-efficiency ratings (IE3, IE4, and IE5 permanent magnet technologies). These premium efficiency motors significantly reduce energy consumption and operational costs. The use of robust cast iron frames helps prevent rotor misalignment, reduces bearing wear, and minimizes planned maintenance downtime, lowering the total cost of ownership.
Technical explanations regarding cast iron motors, explosion-proof standards, and global logistics support.
Cast iron (GG25/GG30) offers significantly higher mechanical rigidity and vibrational damping than cast aluminum. In high-torque applications, cast iron frames effectively absorb vibrations, preventing bearing misalignment and structural fatigue. They also provide better resistance to corrosive chemical environments and high mechanical impacts.
Vacuum Pressure Impregnation (VPI) extracts all air and moisture from the stator slots, replacing them with a highly viscous, solvent-free protective resin. This eliminates air voids, increases dielectric strength, improves heat dissipation, and prevents moisture ingress, making the motor suitable for highly humid environments.
ATEX is a mandatory European Union directive for explosion safety. IECEx is an international conformity assessment system for equipment used in explosive atmospheres. TestSafe is Australia's certification body, specializing in coal mining safety. Our products hold all three certifications, allowing them to be imported and operated globally.
Yes, our WEBP3 and TBVF series are specifically designed for variable speed drive (VSD/VFD) operation. They feature reinforced insulation systems to withstand high voltage spikes, insulated bearings on the non-drive end to prevent circulating shaft currents, and separate cooling fans for continuous low-speed operations.
The fan hood utilizes a side-inlet design that prevents airflow obstructions. Integrated air guides and acoustic lining plates absorb high-frequency noise from air turbulences, reducing operational noise levels by up to 5 dB(A) compared to traditional designs.
As an authorized distributor of Wolong, we can provide custom shaft dimensions, specialized mounting arrangements, tropicalized insulation for high-temperature regions, specialized anti-corrosion paint classes (C5-I or C5-M), RTD sensor integrations, space heaters, and customized termination box configurations.
Permanent magnet synchronous, NEMA standard, and brushless excitation motors for heavy-duty industrial drives.
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