Engineered for extreme performance in hazardous zones, heavy mining, and harsh marine environments.
As the authoritative distributor of Wolong Electric Drive Group Co., Ltd, Shaanxi Nanfang Motor Technology Co., Ltd acts as a critical technological link bridging industry-leading, explosion-proof, and high-efficiency motor manufacturing prowess with global engineering demand. Wolong, founded in 1984 and listed publicly in 2002 (Stock Code: SH600580), has cultivated a global reputation for driving system excellence over its 30+ year trajectory.
The enterprise operates a vast, highly resilient production and engineering ecosystem comprised of 3 main manufacturing bases, 39 localized factories, and 3 world-class R&D centers located strategically across major global markets. Committed to a steadfast global brand strategy, Wolong leverages advanced manufacturing capabilities to lead the international electric motor segment across technology integration, digital design pipelines, and global distribution.
Discover Partner OptionsExplore the inner mechanics and advanced componentry that guarantee structural reliability and explosion-proof integrity under catastrophic pressure.
The rotor assembly incorporates a highly optimized squirrel cage design. Cast aluminum rotors are fabricated via advanced centrifugal aluminum casting or precision high-pressure die-casting. Molten pure aluminum is injected seamlessly into the rotor core laminations, producing a unified structure containing both rotor bars and end rings. This minimizes electrical resistance variations and balances dynamic stress under load. For large-frame, high-torque configurations, copper bar rotors are utilized, featuring reinforced bar locking and premium induction-welded end rings, alongside custom rotor protective rings for high-speed stability.
The stator windings are structured using premium polyester-film insulated wires reinforced with dense glass-cloth backing. They incorporate high-mica tape profiles (low-powder or medium-powder variants) to maximize dielectric strength. The winding assembly undergoes a rigorous Vacuum Pressure Impregnation (VPI) process to yield a void-free, monolithic structure. This VPI processing ensures optimal mechanical hold, excellent moisture barrier properties, high thermal dissipation capability, and superior resilience against transient electrical surges.
Constructed utilizing mature, high-tensile cast iron or heavy fabricated steel, the motor enclosure is refined via modern multi-physics finite element analysis (FEA) platforms. The frame structure provides excellent structural redundancy, isolated natural-frequency margins, and rapid heat dissipation paths. This mechanical resilience ensures that the frame can withstand severe mechanical shocks, isolate internal explosive ignition pressures, and maintain exceptionally low vibration levels.
The low-noise ventilation system consists of an engineered fan cover body, internal air guide cylinders, protective mesh, and sound-absorbing acoustic plates. By situating the air inlet on the side, the system minimizes rear airflow obstructions and reduces turbulence-generated sound energy. The integration of high-density acoustic material decreases noise emission levels, while the IP22-rated outer shroud prevents human contact with the rotating fan element.
How targeted global acquisitions merged European innovation with Asian manufacturing scale.
Wolong’s ascension to the pinnacle of the industrial drive segment was accelerated by a series of high-profile acquisitions of historic Western motor brands. By integrating centuries of European engineering intellectual property with advanced domestic automation, Wolong offers a robust, high-performance portfolio tailored to global requirements.
Wolong successfully acquired 97.94% of ATB Group, one of Europe's top three motor manufacturers. This integrated the 130-year legacy of Morley in underground coal mining drives and Laurence Scott, renowned for low-starting-current nuclear and naval power drives.
Established in 1882, Schorch remains a major brand in heavy industrial drive systems, serving oil & gas, chemical processing, maritime test stations, and complex tunneling projects worldwide.
China's largest explosion-proof motor R&D and production base joined Wolong, establishing a national center of excellence for high-voltage, low-voltage, and custom flameproof synchronous/asynchronous motors.
The acquisition of GE's commercial and industrial motor division brought extensive heavy-duty field experience in American petrochemical, mining, pulp & paper, and materials processing industries.
Brook Crompton Motors: A pioneer in energy-efficient motor designs, bringing over a century of expertise in low, medium, and high-voltage AC motors. Brook Crompton leads the development of highly efficient drive packages for harsh and hazardous industrial environments.
OLI Vibrators: Established as a joint venture with Wolong in China in 1999, OLI is a global brand in vibration motor and Ex vibration sensor technologies, supplying reliable components for material handling and process separation.
Tailored mechanical designs configured to meet the specific environmental stresses of major global industries.
In oil refining, natural gas extraction, and petrochemical transport, motors must reliably operate in Zone 1, Zone 2, Zone 21, and Zone 22 hazardous zones. Our flameproof motors feature corrosion-resistant offshore epoxy paint systems, carbon-sleeve bearings, and dual-chamber flameproof terminal boxes to isolate gas ignition hazards.
Underground coal mines present extreme mechanical loads and explosive coal dust atmospheres. We supply heavy-duty traction and conveyor motors featuring water-jacket cooling shells, specialized copper-bar rotors, and high mechanical-shock resistance ratings to keep coal transport operations running reliably.
Operating with complete DNV type-approval certificates, our low-voltage and high-voltage marine electric motors are designed to withstand aggressive salt spray, high ambient humidity, and continuous vessel pitch-and-roll cycles. Perfect for deck machinery, thrusters, and safety pumps.
Unlocking international trade barriers with certified compliance across key regional jurisdictions.
Nemko / ATEX
CSA Group
CE Mark
CC China
SABS South Africa
TESTSAFE
Shaanxi Nanfang Motor and Wolong ensure that every supplied flameproof motor aligns with local and international regulatory requirements:
Wolong's production infrastructure integrates advanced manufacturing technology to achieve high throughput, strict quality consistency, and short delivery lead times. By utilizing digitized production lines, robotic winding operations, and automated test bays, we mitigate manual assembly variation.
Our raw materials are sourced through audited partners, securing high-permeability electrical steel sheets, pure electrolytic copper, and robust cast iron frames. This vertically integrated supply chain enables Shaanxi Nanfang Motor to maintain price competitiveness and reliable delivery schedules, even during complex project executions.
Whether coordinating custom frame sizes, variable frequency speed ranges, or specific marine certifications, our streamlined engineering pipeline shortens lead times from draft to delivery.
Advancing hazardous area motor technology through digitalization, efficiency, and material science.
Future flameproof motors will integrate Ex-certified vibration sensors, bearing thermal detectors, and magnetic flux monitors directly into the terminal housing. Using wireless edge computing protocols, these smart drives will output predictive diagnostics, helping operators avoid unexpected downtime.
By combining permanent magnet synchronous motor (PMSM) designs with variable frequency drives, our latest Ex motors achieve IE5 ultra-premium efficiency. This technology yields high energy savings under partial load conditions, reducing carbon footprints in heavy continuous operations.
Partnering with material research laboratories, Wolong is developing corona-resistant nanocomposite mica insulation tapes and low-viscosity resin formulas. These materials increase winding life under severe high-voltage VSD carrier frequencies and elevated operating temperatures.
Large industrial operators evaluate their electrical machinery using a strict Total Cost of Ownership (TCO) model. Purchase price, operational efficiency, maintenance cycles, and failure-risk mitigation all impact the final cost.
Get answers to critical technical questions regarding the selection, application, and compliance of flameproof motor systems.
High-voltage, brushless, variable-frequency, and positive-pressure drive units optimized for severe operating conditions.
NANFANG
