Explore our core explosion-proof industrial AC motors engineered for conveyor operations, heavy cutting machinery, and dangerous gaseous environments.
Shaanxi Nanfang Motor Technology Co., Ltd is the premier authorized distributor of Wolong. Founded in 1984 and successfully listed on the Shanghai Stock Exchange in 2002 (code SH600580), Wolong Electric Drive Group Co., Ltd. has established itself as an absolute global titan in electrical machine engineering. Over more than three decades of hyper-growth, Wolong has constructed 3 major global manufacturing bases, operates 39 state-of-the-art factories, and leverages the intelligence of 3 worldwide R&D centers. Dedicated entirely to advanced motor design and motion control system integration, Wolong executes a premium global brand strategy that positions it at the absolute pinnacle of technology, research, manufacturing efficacy, and global distribution.
Harnessing over a century of premium European, American, and Asian engineering legacies integrated under Wolong.
Accumulated with abundant assets and brilliant experiences in heavy motor manufacturing, Wolong reached strategically to acquire industry leaders worldwide. In 2011, Wolong successfully acquired 97.94% of the Austrian ATB Group (ATB motor), which stands as one of the three major European motor manufacturers, instantly positioning Wolong as a premier controller of global explosion-proof electrical technologies. The ATB Group brought into the family world-famous brands like Morley in the mining sector and Laurence Scott in heavy duty operations.
With an illustrious history spanning nearly 130 years, Morley is intrinsically linked to underground coal mining. Today, Morley is a global benchmark for safety and high-torque reliability in coal shearers and heavy armored conveyors.
Famed for supplying engineered low starting current motors to British nuclear power generation sites and specialized generators to naval fleets, Laurence Scott has earned the prestigious Queen's Award for three consecutive years.
In addition, Brook Crompton Motors joined the Wolong Group, bringing over a century of unmatched mastery in low, medium, and high voltage AC motor design. Brook Crompton is a recognized pioneer in developing high-efficiency systems, including the famous Brook Crompton "W" and "10" series designed to withstand the harshest operations.
Our capabilities were further expanded with the addition of Schorch Electric Motor in 2011. Since its founding in 1882, Schorch has defined German manufacturing excellence, delivering rugged heavy drive solutions to global megaprojects across oil & gas, chemicals, marine, and high-risk extraction tunnels.
For vibration-sensitive systems, OLI Brand holds the largest market share globally for vibration motors (MVE) and Ex vibration sensors, establishing a joint venture with Wolong in China in 1999. In 2015, China's largest scientific research and manufacturing base for explosion-proof drives—the Nanyang Explosion-Proof Group (CNE)—merged with Wolong. And in 2018, the commercial and industrial division of General Electric (GE) joined the ranks, providing massive design databases and system support to Wolong's global base.
ATB Legacy
Morley Mine
Laurence Scott
Brook Crompton
Schorch Drive
OLI Brand
CNE Nanyang
GE Motors
Wolong Global
Engineered for structural absolute containment and high-torque output under the most volatile mining environments.
Features a heavy-duty squirrel-cage architecture. Cast aluminum rotors are produced via advanced centrifugal die-casting, melting pure grade aluminum directly into the slots for a robust, one-piece construction. For larger scale mining operations, we integrate copper bar rotors featuring specialized end ring welding and protection rings, guaranteeing dynamic stability at critical high-speed operation points.
The core coils utilize high-grade polyester film reinforced with glass cloth alongside medium or low-powder mica tape containing rich mica particles. Using our class-leading Vacuum Pressure Impregnation (VPI) cycle, the stator turns into a highly monolithic structure with outstanding dielectric strength, thermal dissipation properties, and total moisture resistance.
Engineered via fully digital, multi-physics structural and fluid simulation software. Built from high-tensile cast iron or precision fabricated structural steel. Features extra thick structural walls providing robust shock resistance, optimized air-flow channels for efficient cooling, and wide vibration isolation zones to reduce bearing wear.
Designed with an aerodynamic air guide cylinder, silencer plates, and premium noise-dampening acoustic foams. Rear obstacles are systematically avoided by lateral air intake ports, dropping sound levels drastically. Rated at minimum IP22 protection, the system prevents any physical finger contact with the rotating fan blades.
Custom-engineered electrical drive topologies addressing the distinct challenges of high-risk extraction and processing sites.
Underground and open-pit mining operations operate under extremely harsh conditions. Dust, humidity, corrosive gases, and explosive methane require robust safety measures. Shaanxi Nanfang Motor Technology provides holistic mechanical and electrical solutions that extend far beyond standalone motor supply.
Conveyor drives demand massive starting torque, frequent overload capacity, and synchronization across multiple drive units. Our ATB YBS and YBSD series are specifically designed with high breakdown torque and fluid coupling compatibility, ensuring smooth soft-starts and preventing mechanical chain snap accidents in longwall operations.
Continuous ventilation is critical for mine safety. Main mine exhaust fans must run 24/7/365. We deploy positive pressure type (YZYKK) and dust-proof high-voltage (YFBKK) motors that prevent volatile external dust/gases from penetrating the active electrical compartments, yielding uninterrupted performance.
Coal shearer cutting motors operate directly at the coal face, experiencing continuous shock loads, water ingress from dust-suppression sprays, and extremely limited installation space. Our Morley water-cooled motors and Wolong YBC series provide space-efficient designs that use the mine's cooling water circuit to maintain stable operating temperatures under heavy duty loads.
Driving the next generation of smart, energy-efficient, and predictive explosion-proof motor systems.
As global carbon regulations tighten, the mining sector is transitioning from traditional induction motors to Ultra-Premium Efficiency systems. Our technical roadmap focuses on the scaling of Permanent Magnet Synchronous Motors (PMSM) for hazardous locations. PMSMs provide high torque density, keeping motors compact while delivering IE5-class efficiency. This significantly lowers operating temperatures, further reducing thermal ignition risks in gassy mines.
The future of mining is digital. We are actively integrating explosion-proof wireless vibration sensors, bearing temperature detectors (RTDs), and stator winding monitoring systems directly into the motor housings. By leveraging edge AI diagnostics, these systems predict insulation breakdowns, bearing wear, and phase imbalances before they lead to unexpected downtime, dramatically reducing costs in deep-underground mining projects.
Securing cross-border project approvals with comprehensive international certification credentials.
Mining companies operate globally, requiring compliance with varying regional safety standards. A motor that is certified in Europe may not be legally used in Australia or South Africa without local approvals. Shaanxi Nanfang Motor Technology ensures global compliance by offering standard and regional certifications:
Nemko / ATEX
CSA Group
CE Mark
CC Quality
SABS South Africa
TestSafe Australia
For operations in European and international markets, Wolong explosion-proof low and high-voltage motors are fully certified to IECEx and ATEX standards. This makes exporting, commissioning, and running machinery in Zone 1, 2, 21, and 22 hazardous areas seamless.
To support projects in North America, we perform rigorous tests—including efficiency, starting current, insulation resistance, noise, and vibration testing—to meet NEMA performance specifications. Our low-voltage motors hold UL and CSA certifications.
TestSafe is the primary coal mining product certification body in the Southern Hemisphere. Acquiring TestSafe certification enables Chinese coal mining motors to enter the Australian market, laying a solid foundation for our equipment to be deployed in major Australian underground coal mining operations.
We provide localized engineering support, commissioning service teams, and localized spare part hubs in key mining regions worldwide. This ensures that field installation, troubleshooting, and scheduled maintenance are handled quickly, minimizing operational downtime.
Blending high-speed smart manufacturing lines with rigorous QA frameworks to deliver reliable, value-driven motors.
Wolong's production infrastructure relies heavily on automated smart manufacturing hubs. Our China-based Factory 4.0 centers utilize robotic winding cells, automatic stator insertion machines, and digital quality monitoring to maintain consistent quality across large-scale orders.
Vertical integration across raw silicon steel processing, copper wire drawing, cast iron foundry runs, and final motor testing enables us to maintain control over delivery times and costs. During global logistics bottlenecks, our raw material reserves and dual-sourcing strategy ensure continuous production, maintaining reliable lead times for international mine development projects.
Every motor undergoes load tests, insulation diagnostics, and flameproof joint measurement checks before dispatch, ensuring out-of-the-box reliability in harsh underground sites.
Helping procurement heads, EPC contractors, and maintenance engineers optimize risk, quality, and lifecycle costs.
Delayed motor deliveries can delay commissioning timelines, costing project owners millions. We support procurement teams with clear manufacturing milestones, factory acceptance testing (FAT) logs, and project coordination.
Purchase price is only one component of the total cost. Ongoing efficiency gains, repair intervals, and parts availability impact operations over time. Our high-efficiency motors reduce energy use, lowering overall lifecycle costs.
We provide dimensional drawings, dynamic models, and thermal maps to assist engineering teams during layout design, ensuring compatibility with existing systems.
Get answers to common design, application, and compliance questions from our engineering department.
Ex d (Flameproof): The housing is built to contain an internal explosion without letting the flame ignite volatile methane or coal dust in the surrounding area. It is typically used for Zone 1 underground mining equipment like coal shearers and conveyors.
Ex e (Increased Safety): Designed with structural safety measures to prevent high temperatures, sparks, or electrical arcs from occurring in normal or overload operation. It is common in Zone 2 locations and for non-sparking drive systems.
Our Vacuum Pressure Impregnation (VPI) process places the stator winding under a vacuum to extract air and moisture, then injects high-grade resin at high pressure. This results in a solid, void-free insulation structure that prevents moisture penetration, improves heat transfer, and protects the coils from thermal stress and mechanical vibration.
Yes. Motors intended for VFD use feature specialized insulated non-drive end bearings to block circulating shaft currents, alongside reinforced magnet wires and phase insulation designed to handle high dv/dt voltage spikes common in modern PWM frequency converters.
In South Africa, explosion-proof motors require SABS certification. In Australia, TestSafe is required for coal mine deployment. Shaanxi Nanfang Motor Technology offers both certified product ranges to meet regional safety and compliance standards.
Explore our high-efficiency, water-cooled, and brushless variable-frequency explosion-proof motors.
NANFANG
