Engineered to meet stringent European safety, low-voltage, and energy efficiency parameters.
Shaanxi Nanfang Motor Technology Co., Ltd. is the primary authorized distributor of Wolong Electric Drive Group Co., Ltd. Established in 1984 and listed on the Shanghai Stock Exchange in 2002 (code SH600580), Wolong has advanced to become a global giant in modern motor manufacturing and motion control solutions.
By integrating world-class engineering teams across China, Europe, and Japan, Wolong drives structural innovation, ensuring that high-voltage and low-voltage induction motors reach premium efficiency profiles (IE3, IE4, IE5) and secure essential international safety certifications.
How Wolong brought together the world’s most trusted motor brands to build an unparalleled technology powerhouse.
In 2011, WOLONG acquired 97.94% of the Austrian ATB Group, a leading European motor manufacturer. This integration absorbed Morley (boasting a 130-year legacy in heavy underground coal mining equipment) and Laurence Scott, renowned for low-starting-current reactors and generators serving British nuclear facilities and naval vessels.
Under the WOLONG umbrella, Brook Crompton continues its century-long trajectory in high-efficiency design. Its premium "W" and "10" series low, medium, and high-voltage AC motors deliver reliable, energy-saving adjustable-speed drives tailored for hazardous and severe environmental deployments.
Established in Germany in 1882 and joining Wolong in 2011, Schorch sets the standard for heavy-duty industrial powertrain designs. These drive systems operate globally in infrastructure-heavy sectors: major oil & gas projects, municipal water treatment systems, marine ship propulsions, and structural tunneling.
In 2015, China’s largest scientific explosion-proof motor base (Nanyang Explosion-Proof Group) joined Wolong. This integration combined the most advanced explosion-proof technologies (Ex d, Ex e, Ex nA, Ex td) with modern production lines to supply safe machinery for petrochemical, coal-mining, and nuclear power environments.
Acquired by Wolong in 2018, GE's commercial and industrial motor division brought a wealth of heavy-duty engineering files. Serving oil extraction, cement processing, mining, and metal refining, this brand synergy strengthens Wolong's reach in the North American NEMA-standard market.
Wolong joined forces with OLI in China in 1999. OLI holds the largest market share globally for industrial vibrators (MVE series) and explosion-proof vibration sensors, vital for bulk material handling, agricultural silos, feed systems, and pharmaceutical shaker tables.
A deep dive into the metallurgy, mechanical structural design, and insulation chemistry that define our induction motors.
Our squirrel-cage rotors are engineered using state-of-the-art centrifugal aluminum casting and high-pressure die-casting processes. Molten high-purity aluminum is injected into the precision-slotted rotor lamination stacks, producing a unified structure of rotor bars and integrated cooling end rings. This minimizes electrical resistance and optimizes torque-to-inertia ratios.
For high-capacity or variable-frequency drive (VFD) applications, we incorporate copper-bar rotors. The copper bars are securely fitted into the rotor slots and joined to the end rings using automated, high-strength welding methods. Carbon fiber or alloy containment rings are used in high-speed applications to prevent rotor deformation from centrifugal forces.
The stator core winding features high-grade, double-insulated copper wire wrapped with polyester film and reinforced with structural glass cloth. We use low-powder and medium-powder mica tapes with high mica content to ensure high dielectric strength.
The completed stator undergoes a computer-controlled Vacuum Pressure Impregnation (VPI) cycle. This process removes all moisture and air voids, replacing them with a high-temperature solventless resin. The result is a robust, moisture-resistant, and thermally stable winding system that complies with Class F and Class H insulation requirements, ensuring stable operation in humid and chemically corrosive environments.
The structural integrity of our motor frames is designed using a digital multi-physics simulation platform. Finite Element Analysis (FEA) helps optimize cooling rib geometry and structural rigidity, maximizing surface-area-to-mass ratios for heat dissipation.
Manufactured from high-tensile cast iron or fabricated structural steel, these frames provide high torsional stiffness. This design absorbs mechanical impacts, minimizes vibration transmission, and prevents resonance issues when paired with variable speed drives.
Our low-noise fan cover system includes an integrated air guide cylinder, protective mesh windows, and sound-absorbing baffle plates. The side-entry air intake design prevents blockage and minimizes turbulence at the rear intake.
Internally lined with sound-dampening composites, the assembly reduces high-frequency fan noise. It meets IP22 finger-safe standards while maintaining optimal cooling airflow to keep internal temperatures well below critical winding limits.
WOLONG's industrial induction motors meet global regulatory requirements for entry into markets worldwide.
Nemko / ATEX
CSA
CE
CCC
SABS
TESTSAFE
Our global supply chain operates within a comprehensive quality framework. This ensures that every manufactured motor satisfies the technical requirements of its destination country:
As industries move toward deep decarbonization, Wolong is expanding the boundaries of electrical powertrain design. Our technology roadmap focuses on achieving IE5 ultra-premium efficiency using Synchronous Reluctance (SynRM) and permanent magnet hybrid configurations.
By integrating variable speed drives (VSD) with advanced software algorithms, we reduce excitation losses and optimize motor performance across variable torque loads.
Our R&D is also focused on smart, connected motor technologies. Built-in temperature and vibration sensors transmit real-time telemetry to cloud-based diagnostic platforms, enabling predictive maintenance that prevents unplanned downtime in continuous process plants.
Developing next-generation line-start permanent magnet and SynRM designs that exceed IE4 efficiency standards, reducing energy losses by up to 20% compared to standard induction models.
Integrating vibration sensors and thermal couples directly into the stator winding end turns, enabling real-time condition monitoring via industrial Ethernet.
Engineered powertrain solutions built to handle harsh conditions across heavy industries.
Explosion-proof motors designed to operate safely in volatile atmospheres. Our flameproof (Ex d) enclosures contain internal explosions, preventing the ignition of surrounding gases in refineries, offshore platforms, and midstream pipeline pump stations.
Water-cooled and flameproof mining motors built to withstand heavy mechanical shocks. These systems power coal shearers, continuous miners, and high-capacity conveyor belts in damp, dusty underground mines.
High-voltage induction motors designed for water pumps, boiler feed pumps, and cooling towers. Engineered for continuous operation (S1 duty cycle) with high reliability and low maintenance requirements.
Our manufacturing facilities utilize automated winding systems, robotic handling, and digital quality monitoring to maintain precision across production batches.
By vertically integrating key manufacturing steps—such as laminating silicon steel, drawing copper wire, casting frames, and winding stators—we reduce dependency on external component suppliers.
This structure enables shorter lead times, stable pricing, and consistent build quality, even when global logistics chains face disruptions.
We offer localized engineering support, commissioning help, and post-sales service through Wolong's global network of 39 factories and regional service hubs.
Our service technicians help design custom mountings, configure VFD parameters, and conduct site vibration analyses. We ensure all equipment complies with local electric codes, mechanical safety standards, and environmental regulations.
Key considerations for procurement managers seeking high-efficiency electric motors.
Since energy consumption accounts for over 90% of an electric motor's lifetime costs, choosing high-efficiency models (IE3/IE4) significantly lowers total cost of ownership. Calculating energy savings and utility rebate eligibility helps shorten capital payback periods.
We coordinate international shipping, customs documentation, and regional compliance steps to ensure smooth deliveries. Our team manages tariff classifications and logistics pathways to prevent import delays.
We customize shaft extensions, flange dimensions, terminal box orientations, space heaters, and temperature detector (RTD) configurations to match retrofits or new system installations.
Answers to common technical questions about our CE-marked induction motors.
Our motors comply with the Low Voltage Directive (LVD) 2014/35/EU and the Electromagnetic Compatibility (EMC) Directive 2014/30/EU. In addition, motors intended for explosive atmospheres are certified under the ATEX Directive 2014/34/EU, and all models meet the Eco-design Regulation (EU) 2019/1781 efficiency guidelines.
Vacuum Pressure Impregnation (VPI) extracts air and moisture from the stator assembly, filling voids with a high-temperature solventless resin. This process increases dielectric strength, improves mechanical bond strength, and protects against moisture, salt spray, and chemical vapors.
Yes, our YVF and YBBP variable frequency series are engineered for variable speed drive (VSD) operation. They feature reinforced insulation (often Class H), insulated non-drive end bearings to prevent shaft currents, and separate cooling fans to ensure thermal stability at low operational speeds.
IEC frames use metric dimensions (millimeters) and are governed by IEC 60072 standards, whereas NEMA frames use imperial measurements (inches) under NEMA MG1 guidelines. We supply both designs (such as our NEXP NEMA series) to fit different system requirements.
All rotors undergo dynamic balancing to G2.5 or G1.0 quality grades on precision balancing machines. For heavy-duty operations, copper-bar rotors feature welded end rings and carbon fiber retaining bands to prevent mechanical deformation and vibration at high rotational speeds.
Explore our line of specialty, heavy-duty, and explosion-proof asynchronous AC motors.
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