Engineered for hazardous and demanding heavy-duty operations globally.
In today's highly dynamic heavy industrial landscape, electric motors act as the primary muscle driving infrastructure worldwide. The demand for OEM induction motor engineering is shifting from off-the-shelf purchases to custom-engineered drivetrain architectures. Multi-national corporations, EPC contractors, and system integrators face escalating pressure to balance carbon reduction goals with severe cost pressures. This environment is characterized by strict global energy guidelines and specialized safety standards for operations in hazardous locations.
Current industrial stats highlight that electric motor systems consume more than 45% of global electrical energy. In environments like petrochemical refineries, offshore gas platforms, and deep-shaft mining, motor failure can trigger production halts costing hundreds of thousands of dollars per hour. Sourcing teams prioritize motor designs that provide high structural integrity, optimized power density, variable frequency drive (VFD) compatibility, and compliance with local safety standards (ATEX, IECEx, UL, NEMA).
As standard efficiency motors phase out under regulatory shifts like the European Union's Ecodesign Directive, global manufacturers are stepping up R&D in super-premium efficiency (IE4) and ultra-premium efficiency (IE5) induction and permanent magnet synchronous motors. By choosing high-quality OEM partners, enterprise buyers can integrate customized structural configurations directly into their heavy equipment, securing long-term reliability and lower energy costs.
Shaanxi Nanfang Motor Technology Co., Ltd. is the authorized distributor of Wolong. Wolong Electric Drive Group Co., Ltd. was founded in 1984 and successfully listed on the Shanghai Stock Exchange in 2002 (code SH600580). Over more than 30 years of strategic growth, Wolong has scaled its operations to include 3 global manufacturing bases, 39 manufacturing factories, and 3 R&D centers worldwide. With this footprint, Wolong has established itself as a leading authority in the design, engineering, and distribution of industrial electric motors and control systems.
Combining European engineering heritage with precision manufacturing capabilities.
Wolong's global reach is built on targeted acquisitions of highly respected names in industrial motor design. In 2011, the group acquired a 97.94% controlling stake in the Austrian ATB Group (ATB Motor), one of Europe’s leading motor manufacturers. This acquisition integrated ATB's specialized brands, including Morley and Laurence Scott, directly into Wolong's technological portfolio.
European technical pioneer in premium industrial motor systems.
Founded in 1882. Heavy-duty drives for complex oil and gas projects.
Century-old British brand specializing in high-efficiency industrial motors.
Acquired commercial/industrial division (2018), boosting heavy industry tech.
Morley Motors: With a 130-year operational history, Morley is closely tied to underground coal mining. Known for safety and reliability, Morley is a preferred name for high-specification electric mining machinery worldwide.
Laurence Scott: Known for pioneering low starting-current motors, Laurence Scott has supplied equipment to British nuclear facilities and naval vessels. Following its integration into the Wolong portfolio, the company received the Queen's Award for three consecutive years.
Schorch Electric: Since 1882, Schorch has designed heavy-duty motor systems for demanding applications in petrochemicals, water treatment, shipbuilding, and steel processing.
OLI & Nanyang Explosion-proof (CNE): In 1999, Wolong partnered with OLI, a global leader in vibration motor (MVE) systems. In 2015, China's largest explosion-proof research and manufacturing base, Nanyang Explosion-Proof Group (CNE), officially joined Wolong, strengthening the group's range of explosion-proof asynchronous and synchronous motor products.
Addressing operational challenges in high-demand environments.
Certified to ATEX, IECEx, and EAC standards. Our explosion-proof and flameproof motor designs are engineered to prevent flame transmission, ensuring safe operation in Zone 1, Zone 2, Zone 21, and Zone 22 environments.
Available in IE3, IE4, and IE5 efficiency ratings. We offer permanent magnet configurations designed to lower operational costs, reduce carbon footprint, and comply with international energy regulations.
Covering low, medium, and high-voltage configurations (up to 13.8kV). Built to integrate with variable frequency speed regulation systems, our motors offer stable speed control and reliable torque across variable load profiles.
A technical breakdown of component design and material selection.
Our rotors are built using a rugged squirrel-cage design, utilizing high-grade cast aluminum or dynamic copper-bar construction based on duty cycle demands. Centrifugal aluminum casting and high-pressure die-casting ensure void-free slot filling, integrating the rotor bars and end-rings into a single component. This structural integrity minimizes slip losses, balances internal thermal distribution, and improves start-up torque capability.
For larger high-voltage applications, copper-bar rotors are utilized. We apply advanced mid-frequency induction welding to secure the copper bars to the end-rings, preventing structural fatigue from cyclic thermal expansion. High-speed models are equipped with carbon-fiber or alloy retention rings, ensuring mechanical integrity under high centrifugal forces.
The stator core is built using high-permeability, low-loss silicon steel laminations, insulated on both sides to minimize eddy current losses. The coils are wound with high-grade copper wire insulated with polyester film and reinforced with glass cloth. We utilize low-powder or medium-powder mica tapes with high mica content to ensure insulation integrity in high-voltage configurations.
Our insulation system relies on the Vacuum Pressure Impregnation (VPI) process. Coils undergo deep VPI cycles to eliminate air pockets, creating a moisture-resistant, mechanically stable structure with high thermal conductivity. This process protects the stator against corona discharge and tracking under VFD-induced transient voltages, meeting Class F (155°C) limits with Class H (180°C) thermal reserves.
The motor enclosure is designed using digital multi-physics simulation platforms to model structural stress and thermal fluid dynamics. Constructed from high-tensile cast iron or welded structural steel, the frame provides robust rigidity, high shock resistance, and low vibration profiles.
By optimizing the layout of the cooling fins, the frame improves convective heat dissipation, maintaining a uniform temperature profile. Frame foot dimensions and shaft extensions conform to IEC and NEMA standards, allowing for seamless drop-in installation on existing industrial bases.
Our low-noise cooling systems are engineered with a streamlined fan cowl, integrated air-guide cylinder, protective mesh window, and sound dampening plates. The side-inlet design optimizes air intake pathways, minimizing aerodynamic drag, energy losses, and wind noise.
The fan blades are dynamically balanced to limit mechanical vibration. The system includes integrated sound-absorbing materials to damp high-frequency operational noise, meeting strict workplace safety requirements. The fan cowl is IP22 rated to protect personnel while maintaining airflow.
Certifications that enable deployment in regulated markets worldwide.
To support global industrial supply chains, Wolong maintains a broad range of product certifications. Our motors comply with international trade codes and safety standards, simplifying local integration and regulatory approval.
ISO 9001 Ex Standard: Our manufacturing facilities utilize a rigorous quality management system certified to ISO 9001 Ex standards. From material sourcing to dynamic testing, every process is traceable, ensuring consistent quality across batches.
NEMA & IEC Standards: We engineer low-voltage and medium-voltage motors to meet NEMA and IEC standards. Testing protocols verify performance metrics like start-up current, torque curves, and efficiency. Certification through UL (Underwriters Laboratories) and CSA (Canadian Standards Association) provides compliance for North American installations.
IECEx & ATEX Standards: For hazardous locations, our motors are certified to IECEx and ATEX standards. This ensures safety for equipment operating in explosive atmospheres within European and global installations.
TESTSAFE Standard: Certified by Testsafe, the largest coal-mining equipment certification body in the Southern Hemisphere. This certification supports the deployment of Wolong coal-mining motor systems in Australia and other international mining markets.
Nemko / ATEX
CSA Group
CE Conformity
CCC / CC
SABS Approved
TESTSAFE
Providing high-efficiency torque for demanding operations.
Wolong motor systems operate across diverse industrial applications globally. Operating in environments from chemical plants to mining operations, our motors provide reliable power for pumps, fans, compressors, and conveyors.
In response to global decarbonization goals, Wolong's technology roadmap focuses on three main development areas:
1. Material Optimization for IE5 Ultra-Premium Efficiency: By using ultra-thin silicon steel laminations and optimized slot-filling techniques, we reduce stator and rotor losses. High-performance permanent magnet materials are integrated into hybrid designs to improve efficiency across variable load curves.
2. Smart Health Monitoring & Digital Twins: Working with our drive control centers in China, Europe, and Japan, we incorporate vibration, temperature, and current sensors directly into the motor. This data feeds into predictive maintenance systems, allowing operators to monitor winding insulation health and bearing life remotely, helping to prevent unscheduled shutdowns.
3. VFD and Smart System Integration: We optimize motor winding configurations to work with variable frequency drives, minimizing harmonic losses and voltage spikes. These integrated motor-drive packages offer improved efficiency, precise speed control, and soft-start capabilities that protect mechanical components.
Common questions regarding industrial induction motor specifications and applications.
The VPI process ensures the motor winding insulation is free of air pockets. This structural density improves heat dissipation, provides protection against moisture, acids, and alkalis, and helps prevent partial discharge, extending the motor's operational lifetime in demanding environments.
Copper-bar rotors are selected for high-power, high-voltage applications and systems subjected to heavy starting cycles. Copper offers lower electrical resistance, which improves efficiency and manages high starting currents and thermal expansion under heavy loads.
Wolong motors undergo safety testing certified by international bodies including Nemko for ATEX/IECEx, CSA, and CCC. This testing verifies that flameproof enclosures can contain internal explosions without igniting gases in the surrounding atmosphere.
Yes. Wolong designs OEM motors to match standard NEMA and IEC frame dimensions, shaft extensions, and electrical configurations, allowing for direct replacement of existing industrial motor installations.
Testsafe certification confirms that coal-mining motors comply with Australian safety regulations. This simplifies safety approval and installation for mining operations in Australia and related global jurisdictions.
Engineered for high power, speed control, and heavy industrial duty cycles.
NANFANG