Exhaustive array of CE certified, explosion-proof, and high-efficiency induction motors customized for hazardous environments and heavy machinery operations.
Founded in 1984 and listed on the Shanghai Stock Exchange in 2002, Wolong Electric Drive Group Co., Ltd. (SH600580) has transformed into a dominant global force in industrial electrification. Over the last four decades, Wolong has systematically structured a manufacturing and engineering matrix consisting of 3 major global R&D bases, 39 advanced manufacturing plants, and 3 global technology research centers. Shaanxi Nanfang Motor Technology Co., Ltd is proud to operate as the authorized distributor of Wolong, providing clients across all continents with seamless access to high-spec electric drives and control systems.
By executing a focused global brand integration strategy, Wolong has brought together several of the world's most prestigious, century-old industrial motor manufacturers under one umbrella, including ATB, Brook Crompton, Morley, Laurence Scott, Schorch, OLI, and General Electric's industrial motor business.
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Acquired in 2011. One of Europe's top three motor groups, incorporating Laurence Scott's low starting current capabilities and Morley's heavy mining expertise.
Venerable British leader with over a century of motor development. Renowned for energy-efficient 'W' series and hazardous area drive packages.
Founded in 1882. The absolute benchmark for high-voltage and customized heavy industrial drives in German oil & gas and petrochemical sectors.
Integrated into the Wolong network in 2018. Adds decades of heavy-duty American industrial design and application experience to the portfolio.
How Wolong leverages cross-border technology, precision simulations, and premium materials to solve critical industrial drivetrain challenges.
We provide multiple explosive-proof variants engineered to meet stringent global standards, providing robust protection in hazardous environments like offshore petrochemical rigs and deep coal mines.
Certified IE3, IE4, and IE5 energy-saving solutions. Advanced Permanent Magnet Synchronous Motors (PMSM) are available to significantly reduce operational costs and carbon emissions.
Our expansive inventory spans low voltage variable frequency AC motors, high voltage synchronous induction engines, water-cooled asynchronous units, and custom vibrators.
In 2011, Wolong acquired 97.94% of the Austrian ATB Group. This acquisition integrated the engineering records of Morley, which possesses a 130-year lineage dedicated to underground coal mining. Morley is highly esteemed globally for its heavy-duty flameproof conveyors and shearer motors. Concurrently, Laurence Scott, a pioneer in low-starting-current generator engineering that supplied systems for British nuclear facilities and navy warships, joined the team.
By 2015, the integration of CNE (Nanyang Explosion-proof Group) was completed. CNE, China's premier explosion-proof motor research and manufacturing base, expanded the group's capacity to serve chemical processing, metallurgy, nuclear power, and military infrastructure projects globally. This cross-brand technological convergence makes Wolong an ideal partner for complex three-phase industrial drive projects.
Deep dive into the structural components and metallurgical technologies that ensure continuous operation under extreme mechanical stresses.
The rotor features a classic squirrel cage configuration. Depending on application size, it utilizes cast aluminum or copper bar assemblies. Aluminum rotors are produced using centrifugal casting or advanced die-casting, melting pure aluminum directly into the rotor core slots. This yields a single-piece construction combining rotor bars and end rings, ensuring stable torque profiles.
For larger capacity and high-torque motors, copper bar rotors are used. These feature welded copper bars and end rings with structural protective rings on high-speed configurations to prevent centripetal deformation during high-speed rotation.
The stator coil is built using high-grade copper wire wrapped with polyester film and reinforced with glass cloth. We utilize premium mica tapes (both low-powder and medium-powder with high mica content) to deliver exceptional thermal and electrical isolation.
The entire stator package undergoes a Vacuum Pressure Impregnation (VPI) cycle. This process extracts trapped air and moisture before curing the insulation resin. The result is a robust, moisture-resistant stator winding with high mechanical strength, improved heat dissipation, and class-leading thermal stability (Class F/H).
All frames are engineered using a digital design platform that incorporates structural, thermal, and fluid multi-physics simulations. These simulations optimize the heat dissipation fins and structural rib placement.
Cast from high-strength gray iron (or fabricated steel for specialized applications), the frame features high mechanical redundancy and natural frequency isolation. This design dampens vibrational harmonics, protects bearings from premature wear, and ensures structural integrity under high structural impact loads.
Our low-noise fan ventilation system features a compact cover body, an integrated air guide cylinder, a protective window, and structural silencer plates. The air inlet is positioned laterally to prevent blockages from surrounding structures.
By lining the interior of the hood with advanced sound-absorbing materials, we reduce aerodynamic noise caused by turbulence. The fan hood carries an IP22 rating, preventing accidental contact with rotating blades while maintaining optimal cooling airflow.
Wolong three-phase motors meet the testing and safety standards of key international regulatory markets.
Nemko / ATEX
CSA (Canada)
CE (European Union)
CCC (China)
SABS (South Africa)
TESTSAFE (Australia)
To support global B2B procurement, Wolong maintains a comprehensive certification framework across its entire production chain, enabling direct deployment in regulated international markets:
A strategic whitepaper on efficiency regulations, smart grid integration, and global procurement trends.
In industrial systems, electric motors account for over 65% of total power consumption. Consequently, global regulatory frameworks—such as EU Ecodesign Directive 2019/1781—increasingly mandate the use of IE4 (Super-Premium) and IE5 (Ultra-Premium) efficiency classes. Moving from IE3 to IE4/IE5 reduces motor losses by roughly 20-30%, delivering significant operational savings over continuous running hours.
To meet these requirements, Wolong has expanded its WEPM and WE3 high-efficiency asynchronous and Permanent Magnet Synchronous Motor (PMSM) lines. Utilizing PMSM technology enables high torque densities at low operational speeds, often allowing for direct-drive setups that eliminate efficiency losses from gearboxes.
Specifying motors for hazardous areas (gaseous processing plants, chemical storage, flour mills, and coal mines) presents complex engineering and regulatory challenges. A key concern for procurement officers is ensuring alignment with local explosion-proof guidelines. Using mismatched components can lead to project delays or regulatory compliance issues.
Our technical team helps mitigate these risks by providing dual-certified (ATEX and IECEx) motors that meet regional sub-requirements. By integrating our century-old brands—such as ATB and Schorch—we deliver systems that satisfy regional requirements while simplifying compliance audits.
Industrial applications rarely allow for off-the-shelf motor installations. Marine environments require high resistance to salt spray; chemical industries demand acid-proof epoxy coatings; and mining operations need specialized frame dimensions to fit tight underground spaces.
Our manufacturing network utilizes multi-physics modeling to customize motor frames, shaft extensions, and terminal box orientations. Whether configuring water-cooled jackets for high-temperature chemical pumps or developing double-shaft extensions for conveyor drives, we tailor solutions to match your specific mechanical requirements.
Modern process automation relies heavily on Variable Frequency Drives (VFDs) to control motor speed and torque. However, running a standard induction motor on a VFD can cause high voltage spikes, leading to insulation breakdown and bearing erosion from circulating currents.
Wolong's variable frequency motors (such as the YBBP and YBBPX series) are specifically engineered for VFD operation. They feature reinforced VPI winding insulation to handle voltage spikes, insulated non-drive end bearings to eliminate shaft currents, and independent constant-velocity cooling fans to prevent overheating at low operational speeds.
Wolong three-phase drive solutions are utilized across a wide variety of global industries, providing reliable power in demanding environments.
Our three-phase electric motors are engineered to power heavy rotating machinery across diverse operating environments. Key applications include:
Direct engineering answers to common technical, regulatory, and procurement questions regarding 3-phase motors.
Explore our specialized catalog of high-efficiency three-phase motors engineered for deep-well pump drives, mining conveyors, and high-voltage industrial applications.
Our application engineers are available to assist with electrical design configuration, dimensional footprint mapping, and regulatory certification planning.
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