Explore our high-performance electric drive solutions. Retaining full functional URLs and technical specifications.
Shaanxi Nanfang Motor Technology Co., Ltd. serves as the premier channel partner for Wolong Electric Drive Group.
Founded in 1984 and listed on the Shanghai Stock Exchange in 2002 (SH600580), Wolong Electric Drive Group Co., Ltd. has established itself as an undisputed titan of global electric motor manufacturing. Driven by a global brand strategy, Wolong operates 3 specialized manufacturing bases, 39 individual production factories, and 3 global research and development centers across key strategic continents.
By coordinating R&D efforts across China, Europe, and Japan, Wolong successfully serves demanding international clients in hazardous, maritime, mining, and industrial process industries. In close alignment with Shaanxi Nanfang Motor Technology, our partnership provides highly specialized engineering consultancy, customized motor design, and rapid delivery compliance matching global regulatory expectations.
Wolong's systematic integration of international century-old brands offers unmatched technical stability and application-specific expertise.
Acquired in 2011. One of the top three European motor brands, representing superior design precision and featuring Morley (Mining) and Laurence Scott (Low Starting Current).
Integrated in 2018. Over a century of heavy-industry engineering capability powering key mining, metals, and oil & gas infrastructure across North America.
Acquired in 2011. Since 1882, the standard for ultra-heavy duty drives in petrochemical, shipbuilding, steel mills, and tunnel ventilation.
Renowned for highly efficient premium "W" and "10" series low/medium voltage AC motors, designing energy-saving systems for harsh industrial operations.
Additionally, the joint venture with OLI Vibration Motors (established 1999) secures our position as a leader in bulk material handling, while the integration of Nanyang Explosion-Proof Group (CNE) in 2015 establishes a highly secure technological foundation for explosion protection worldwide.
Under the hood of a Wolong motor: advanced materials and strict manufacturing techniques that ensure long service lives in high-stress industrial applications.
Our rotors employ high-purity cast aluminum produced using advanced centrifugal casting or precision die-casting techniques. Molten pure aluminum is injected into the high-grade lamination slots of the rotor core, forming a seamless, single-piece structure comprising the rotor bars, end rings, and integrated cooling blades. This eliminates structural voids, resulting in higher mechanical integrity and outstanding starting torque curves.
For high-capacity low-voltage and high-voltage applications, copper bar rotors are utilized. Copper bars are securely locked into the rotor slots and welded to the end rings using computer-controlled brazing processes. High-speed motors are further equipped with high-tensile retaining rings to prevent radial displacement under severe centripetal force.
The stator winding is designed to withstand extreme thermal, electrical, and environmental stresses. Coils are wound using high-grade, double-insulated copper wire wrapped with multiple layers of polyester film and glass cloth reinforced mica tape. The system utilizes low-powder or medium-powder mica tape containing rich mica content to provide maximum dielectric strength.
To eliminate air pockets and guarantee moisture-proof operations, the fully wound stator core is subjected to Vacuum Pressure Impregnation (VPI). This involves vacuuming out all air and moisture from the slots, injecting high-solid epoxy solventless resin, and curing it under high pressure and temperature. The resulting monolithic insulation system offers superior heat dissipation, high mechanical rigidity against electromagnetic forces, and excellent resistance to chemical vapors.
Engineered using advanced finite element analysis (FEA) and fluid dynamics simulation platforms, our motor frames are cast from premium grey iron or fabricated from heavy-plate structural steel. This dual design approach provides excellent structural rigidity, dampening mechanical vibrations (complying easily with ISO 10816 standards) and isolating structural resonant frequencies from the electrical supply frequency.
The cooling fins are strategically spaced and oriented to optimize laminar airflow across the motor surface, accelerating heat dissipation. This layout prevents localized hot spots, leading to lower internal temperature rise, longer winding life, and reliable operation in heavy industrial zones.
The low-noise ventilation system incorporates an aerodynamic fan cover body, an air guide cylinder, a protective window, and structural silencer plates. The entire assembly is designed using computational fluid dynamics (CFD) to reduce vortex noise and windage losses.
By positioning the air inlets on the sides, the design minimizes obstacles behind the motor, reducing airflow restriction. Built-in acoustic damping materials absorb high-frequency fan noise, while the entire assembly maintains an ingress protection rating of IP22 (or higher upon request) to prevent accidental contact with the rotating fan blades.
Wolong motors comply with leading international quality and safety directives to ensure smooth market entry and high reliability.
Nemko / ATEX
CSA Standard
CE Certification
CCC Mark
SABS Approved
To support global supply chains, Wolong maintains a broad range of product certifications for standard and hazardous environments:
We keep records of all test certificates, winding temperature rise curves, dynamic balance records, and flameproof path parameters.
Our engineering services address the operating requirements of key industrial and maritime sectors.
Explosion-proof motors like the YBBPX and YBXKK series provide high safety in gas group IIB/IIC and dust atmospheres. These motors drive high-pressure pumps, compressors, and pipeline transport installations.
Our Morley-engineered explosion-proof motors (such as the YBS and YBK3 series) operate in methane-rich coal dust environments, driving shearers, scraper conveyors, and main ventilating shafts under tough mechanical loads.
The YQ series marine three-phase asynchronous motors carry DNV Type Approval, offering protection against salt spray corrosion and high humidity, and accommodating deck tilt on ocean-going vessels.
Our distributed synchronous condenser system solutions provide reactive power compensation and transient voltage support to stabilize regional electrical grids with high renewable energy penetration.
By pairing permanent magnet synchronous motors (PMSM WEPM series) with advanced variable frequency drives (VFD), we deliver high efficiency across the entire speed range for fans, pumps, and factory automation.
Large-scale municipal drainage and industrial water pumps rely on our WE3 and Brook Crompton WE series high-efficiency induction motors to achieve continuous, year-round operation with minimal downtime.
Insights from our engineering department regarding installation, standards compliance, and motor performance.
ATEX is a mandatory European directive (Directive 2014/34/EU) required for placing explosion-proof equipment on the EU market, and it includes both technical and quality assurance audits. IECEx is a voluntary, international certification scheme focused on compliance with IEC standards. While their technical testing requirements are closely aligned, ATEX requires CE marking and compliance with EU directives, whereas IECEx is widely accepted outside of Europe without regional packaging changes.
VFDs generate high-frequency common-mode voltages that can induce current flow through the motor shaft and bearings to the frame, leading to electrical discharge machining (EDM). This causes pitting and fluting in the bearing raceways, resulting in premature bearing failure. To prevent this, our high-voltage variable frequency motors (like the YBBPX series) use insulated non-drive end bearings or hybrid ceramic bearings to interrupt the current path.
Unlike standard induction motors, where the rotor magnetic field is created by induction and generates rotor copper losses, a PMSM (such as the WEPM series) utilizes high-energy permanent magnets on the rotor to establish a constant magnetic field. This design eliminates rotor current losses, resulting in high efficiency—often exceeding IE5 standards—even under partial load and variable speed operations.
Offshore marine motors operate in environments with high humidity, salt spray, and chemical exposure. The VPI process replaces air pockets within the stator slots with solid, cured resin, creating a moisture-proof seal. This enhances dielectric strength, prevents moisture ingress, and improves thermal conductivity, allowing the motor to run cooler in harsh maritime applications.
Flameproof (Ex d) enclosures are designed to contain an internal explosion and prevent the propagation of flames or hot gases to the surrounding explosive atmosphere. In contrast, increased safety (Ex e) designs focus on preventing arcs, sparks, or hot surfaces from occurring during normal operation, using high-quality components and strict temperature control without requiring a heavy, explosion-containment enclosure.
IEC standards (IEC 60034) specify metric dimensions (e.g., frame height in millimeters), whereas NEMA standards (NEMA MG1) use fractional inch dimensions. Additionally, NEMA motors typically feature different shaft diameters, keyway dimensions, and mounting bolt patterns compared to their IEC counterparts. We offer both IEC metric frames (WE3, Y3 series) and NEMA standard motors (NSHE series) to simplify physical integration for global OEM customers.
Explore the remainder of our specialized explosion-proof and high-voltage product line.
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