Engineered to operate reliably under extreme humidity, dust, and hazardous gas conditions. Explore our high-performance low/high voltage electric motors.
Founded in 1984 and listed on the Shanghai Stock Exchange in 2002 (code: SH600580), Wolong Electric Drive Group Co., Ltd. is a leading global developer and manufacturer of motor and control drive systems. With more than three decades of specialized experience, Wolong operates 3 major manufacturing hubs, 39 state-of-the-art factories, and 3 global R&D centers.
As the authorized global partner, Shaanxi Nanfang Motor Technology Co., Ltd. supplies industrial enterprises with reliable high/low voltage asynchronous motors, permanent magnet synchronous motors (PMSM), and robust explosion-proof drives designed to safely operate in highly corrosive, explosive, and heavy-particulate environments.
Learn More About Shaanxi NanfangHow Shaanxi Nanfang Motor Tech and the Wolong Group deliver technological superiority, compliance, and custom design adaptation to complex heavy industries.
Unmatched safety profile. Our motors feature heavy-duty casting designs with flameproof (Ex d), increased safety (Ex e), and positive pressure (Ex p) configurations. Authenticated by international bodies including ATEX, IECEx, and CU-TR (EAC).
Designed to save operating expenditure (OPEX). We offer IE3, IE4, and the latest IE5 super-premium efficiency systems, including high-power PM synchronous motors (WEPM Series) that optimize grid utilization and minimize thermal dissipation.
A synergistic network of R&D centers located in China, Europe, and Japan, complemented by the Central Research Institute in Shanghai. This unified setup accelerates technology transfer and enables rapid prototype development.
The Wolong Group has consolidated some of the most famous motor manufacturers globally. This collective engineering expertise is directly integrated into our current IP55 electric motors.
In 2011, Wolong acquired 97.94% of Austria's ATB Group, one of Europe's top three motor manufacturers. This acquisition integrated Morley (UK), which has a 130-year legacy of manufacturing flameproof motors for underground coal mining, ensuring safety under extreme conditions.
Laurence Scott is renowned for low-starting-current designs utilized by British nuclear facilities and navy vessels. Schorch (Germany, Est. 1882) brought deep engineering expertise in high-power, medium-voltage driving systems for the petrochemical, pipeline, and tunnel ventilation sectors.
Brook Crompton's integration brought a century of design expertise in low/medium voltage AC motors (the 'W' Series). The acquisition of General Electric's (GE) commercial and industrial motor division in 2018 added key technology for heavy processing industries, steel mills, and oil refineries.
The corporate footprint extends to vibration technologies. Since 1999, Wolong has partnered with Italy's OLI Vibration Motor, a leading supplier of rotary electric vibrators. In 2015, China’s largest explosion-proof research and production entity, Nanyang Explosion-proof Group (CNE), formally merged into Wolong.
By integrating these heritage brands, Wolong has established a unified technical platform. When procurement teams specify a Shaanxi Nanfang IP55 motor, they benefit from Austrian structural engineering, German electrical tolerances, British thermal management systems, and high-efficiency manufacturing bases in China.
Designed using multi-physics digital simulation platforms, our motors feature robust structural components optimized for reliability and long operating lives.
Our rotors feature a robust squirrel-cage configuration, manufactured utilizing centrifugal aluminum casting or high-pressure die-casting processes. This process integrates the rotor bars and end-rings into a single unit, eliminating air gaps and increasing mechanical integrity.
For large-capacity high-voltage drives, we utilize copper bar rotors with induction-welded end rings. Dynamic balancing to G1.0/G2.5 limits ensures low vibration levels and reduced bearing wear under continuous load.
Stator winding insulation is the core of motor reliability. We utilize Class H and Class F insulation systems featuring high-purity mica tape combined with high-grade polyester films. After winding, the stator core undergoes a computerized Vacuum Pressure Impregnation (VPI) process.
The VPI system ensures the insulation varnish fills all microscopic voids, protecting the windings against humidity, oil, coal dust, and corrosive petrochemical fumes.
The structural casing is designed using 3D finite element analysis (FEA) to verify mechanical resonance margins. Constructed from high-tensile cast iron, the casing features deep, continuous cooling fins designed to optimize heat dissipation.
The rigid design isolates internal magnetic vibration frequencies from external mountings, ensuring low noise levels, structural integrity, and durability in tough operating environments.
Comprising an aerodynamic fan cover body, an integrated air-guide cylinder, protection grilles, and silencer plates. The design features a side-oriented air inlet pathway that minimizes flow restriction and reduces fan-blade noise.
Equipped with an IP22 rating at the air inlet, it prevents foreign objects from contacting the internal cooling fan. It also incorporates sound-attenuating materials to keep noise emissions within international workplace safety limits.
How our IP55 and explosion-proof motors meet the specific operational challenges of critical global sectors.
Operating in environments with volatile gases requires reliable flameproof (Ex d) and increased safety (Ex e) designs. Our IP55-certified enclosures protect internal components from moisture, airborne particulates, and corrosive vapors, preventing internal ignition paths and ensuring stable operation.
Heavy particulate coal dust, constant shock loads, and deep shaft installations demand rugged equipment. Wolong's flameproof tunnel boring and conveyor motors (YBSD/YBU series) feature heavy-duty iron frames, protected shafts, and high overload capacities to prevent dust ingress and withstand mechanical stress.
Continuous pumping systems depend on high reliability and efficiency. Our IE4/IE5 PM synchronous motors reduce energy consumption during partial-load conditions. The IP55 protection rating protects internal parts against water splashes and dust ingress, ensuring a long operating life.
Looking ahead. How Shaanxi Nanfang Motor and Wolong are integrating smart technologies and sustainable materials to prepare for next-generation industrial demands.
The future of industrial motors is connected. Wolong is integrating advanced vibration and temperature sensors directly into motor frames and bearing housings. These systems transmit real-time telemetry to cloud-based predictive maintenance systems.
By monitoring temperature rises, bearing wear, and phase imbalances, operators can schedule maintenance proactively, preventing unscheduled downtime in critical process pipelines.
As global regulations tighten around carbon emissions, our design focus is shifting to ultra-high efficiency topologies. Our WEPM series permanent magnet synchronous motors (PMSM) exceed standard IE4 limits, reducing carbon emissions and overall operating costs.
We are incorporating eco-friendly design elements into our supply chain, focusing on recyclable magnetic components, low-VOC insulation resins, and traceable, highly refined copper source lines.
Leveraging automated manufacturing processes to ensure quality, cost stability, and on-time global shipping.
Wolong's production facilities leverage automated component matching, laser welding, and robotic winding configurations to maintain precise tolerances across high-volume production batches.
Each motor undergoes automated end-of-line verification, testing dielectric insulation strength, starting current peaks, phase symmetry, and housing vibration levels. This computerized record ensures traceability and compliance with global engineering standards.
By sourcing raw electrical steel laminations, high-grade copper wire, and heavy-duty cast iron housings from local suppliers, we maintain stable production cycles free from global supply bottlenecks.
This integrated local supply network allows Shaanxi Nanfang Motor Tech to offer stable pricing and predictable lead times, helping global engineering and procurement departments plan with confidence.
Fully certified for seamless global imports. We maintain active compliance and safety certifications across major regulatory jurisdictions.
Nemko / ATEX
CSA
CE
CCC
SABS
TESTSAFE
To support smooth global operations, our products carry necessary international certifications. We perform testing to verify efficiency, insulation resistance, starting current, overload capacity, dynamic vibration margins, and acoustic signatures.
Our explosion-proof designs are certified to IECEx and ATEX standards, enabling installation in Zone 1, Zone 2, Zone 21, and Zone 22 hazardous areas across the EU and participating global markets.
By securing TESTSAFE certification (the largest coal mining product safety standard body in the Southern Hemisphere), Wolong provides fully compliant flameproof coal mining motors directly to Australia and surrounding regions.
For North American installations, our NEMA standard low-voltage motors are certified to UL & CSA standards, verifying compliance with regional line voltages, frame measurements, and connection configurations.
Ensuring system uptime through a responsive global servicing network and expert localization assistance.
We provide technical document translation, custom shaft dimensions, dynamic load matching, and terminal box configuration adjustments to align with local installation standards and wiring requirements.
Through Wolong's regional distribution hubs and local authorized partners, we maintain a stock of critical spare parts, including bearings, terminal insulation, cooling fans, and seal kits, reducing delivery times.
Our engineers offer remote and on-site support to verify alignment tolerances, soft-start configurations, thermal protection integration, and insulation resistance prior to initial start-up, helping ensure proper installation.
Key technical parameters global procurement teams should evaluate when selecting an IP55 or explosion-proof electric motor.
The first digit of the IP rating indicates protection against solid objects, while the second digit indicates protection against liquids. An IP55 rating indicates the enclosure is protected against dust ingress (harmful deposits) and low-pressure water jets from any direction.
For applications exposed to heavy seas or high-pressure washdowns, we offer custom IP56 and IP66 water-tight designs that feature reinforced shaft seals and liquid gaskets to prevent moisture ingress.
Operating motors on a VFD can introduce voltage spikes and harmonic currents, potentially leading to winding stress or bearing damage. Our VFD-rated motors feature high-grade insulation wire, corona-resistant enamel, and insulated non-drive end bearings to protect against circulating currents and extend bearing life.
Ensure these technical specifications are clearly defined when requesting a quotation:
Get answers to common technical, design, and procurement questions regarding our industrial electric motors.
An IP55 enclosure is designed to protect against dust ingress that could affect performance and resist water projected from a nozzle. An IP56 enclosure offers a higher level of protection against water, designed to resist high-pressure water jets and heavy seas, making it suitable for marine deck installations.
VPI utilizes vacuum and pressure cycles to draw insulating varnish deep into the stator winding coils, eliminating microscopic air pockets. This process creates a solid, moisture-resistant structure with improved thermal conductivity, protecting the windings against electrical tracking and physical damage.
Yes, our low voltage WE4 series, YE4 series, and high-voltage YBBPX/YVF series are designed for VFD operation. For high-power setups, we recommend using insulated bearings on the non-drive end and grounding brushes to prevent electrical bearing damage.
We offer a range of explosion-proof configurations certified by international bodies like ATEX, IECEx, CSA, and EAC. This includes flameproof enclosures (Ex d/Ex db), increased safety designs (Ex e/Ex eb), and positive pressure casings (Ex p/Ex pxb).
High-voltage, marine-grade, and mining-duty drive solutions engineered to meet demanding industrial requirements.
NANFANG
