Explore our leading selection of high-efficiency, explosion-proof, and custom-designed low & high voltage electric motors built for global heavy industries.
The global industrial landscape is undergoing a massive transformation powered by two key forces: energy transition and strict environmental regulations. Industrial electric motor systems account for approximately 53% of global electricity consumption. Consequently, upgrading to high-efficiency 3-phase induction motors is no longer just a method to reduce operating expenses; it has become a central component of corporate ESG mandates and national decarbonization strategies.
Modern industrial plants require powertrain systems that deliver not only mechanical reliability but also advanced integration with variable frequency drives (VFDs) and digital monitoring systems. In response, Chinese manufacturers, led by industry leaders like Wolong and its technical partner Shaanxi Nanfang Motor Technology Co., Ltd., are pioneering the integration of permanent magnet technologies and high-voltage insulation systems to meet the strict efficiency standards of IE4 and IE5 classes. By optimizing electromagnetic design, reducing rotor winding losses, and adopting advanced materials, today's three-phase asynchronous motors provide unmatched stability across wide speed and load ranges, making them ideal for heavy-duty applications in petrochemicals, power generation, and mining operations.
Shaanxi Nanfang Motor Technology Co., Ltd serves as the premier authorized distributor of Wolong Electric Drive Group Co., Ltd. Founded in 1984 and listed on the Shanghai Stock Exchange in 2002 (Ticker: SH600580), Wolong has grown to become a global leader in electric motor manufacturing and drive controls.
Wolong operates a global network consisting of 3 key manufacturing bases, 39 advanced factories, and 3 world-class R&D centers. By integrating century-old global motor brands and technical expertise, Wolong provides customized industrial solutions that meet the highest standards of safety, quality, and durability.
We combine China's high-capacity manufacturing efficiency with advanced European design standards. As the core channel for Wolong's international portfolio, we offer engineering support for hazardous area installations, custom mounting modifications, and direct factory-level testing protocols.
Our solutions are designed to address the challenges faced by international engineering firms (EPCs): minimizing downtime, standardizing documentation, ensuring global certification compliance, and providing reliable local service support.
Through strategic acquisitions of leading international motor manufacturers, Wolong has combined global technical expertise with high-capacity manufacturing to establish a comprehensive industrial supply chain.
Engineered to deliver continuous, reliable power in hazardous areas and harsh environments worldwide.
Our flameproof (Ex d), positive pressure (Ex p), and increased safety (Ex e) low and high-voltage motors are designed to operate safely in volatile chemical environments. Certified to ATEX, IECEx, and EAC standards, they provide continuous, reliable power for critical compressors, pipelines, and extraction pumps.
Featuring the heavy-duty design of the Morley brand, our coal mine motors are engineered to withstand abrasive dust, moisture, and mechanical shocks. We provide high-specification copper-bar rotors and reinforced frames that deliver high starting torque for heavy conveyor drives, grinders, and underground ventilation systems.
Designed for water supply networks, desalination facilities, and wastewater treatment, our high-voltage motors, including the YKK series, provide long service life under continuous duty. Optimized cooling systems and dynamic balancing help minimize noise and vibration while maximizing mechanical efficiency.
A detailed look at the advanced materials and manufacturing processes that define our 3-phase induction motors.
Our rotors feature a robust squirrel-cage design. For standard and high-efficiency models, cast aluminum rotors are manufactured using centrifugal casting or advanced die-casting techniques. This process integrates the rotor bars and end rings into a single-piece component, improving mechanical strength and torque characteristics.
For high-capacity and heavy-duty industrial motors, we use copper-bar rotors. The copper bars are secured using specialized end-ring welding processes, and high-speed applications are fitted with carbon-fiber or alloy retaining rings to maintain structural integrity under extreme centrifugal forces.
The stator windings are insulated using low-powder mica tape with a high mica content, reinforced with polyester film and glass cloth. The completely wound stator core undergoes a computerized Vacuum Pressure Impregnation (VPI) cycle. This process removes air and moisture from the stator slots, replacing them with a solventless polymerizing resin.
The resulting VPI system provides high dielectric strength, excellent moisture resistance, thermal stability up to Class H, and strong protection against mechanical stress and chemical contamination.
Developed using structural and fluid multi-physics simulations (FEA & CFD), our motor frames are manufactured from high-strength cast iron or fabricated steel. The design features optimal cooling fin layouts and mechanical reinforcement to handle high starting torque and vibration levels.
By optimizing the frame design, we achieve efficient heat dissipation and clear natural frequency isolation margins. This minimizes vibration transmission and extends bearing life.
Our low-noise cooling system includes an aerodynamically optimized fan cover, an air guide cylinder, a protective screen, and integrated acoustic silencer plates. The side-inlet air design avoids obstacles behind the motor, reducing turbulence and air resistance.
Constructed with noise-absorbing materials, the system reduces high-frequency fan noise while maintaining an IP22 safety rating to prevent accidental contact with the rotating fan blades.
Take a look inside our manufacturing processes, including CNC machining, winding lines, and load testing stations.
Operating in international markets requires compliance with safety, efficiency, and environmental regulations. Wolong motors hold a wide range of global industrial certifications, enabling direct integration into projects in Europe, the Americas, Australia, and Asia.
Nemko / ATEX
CSA
CE
CCC
SABS
TESTSAFE
Our manufacturing processes are certified to the ISO 9001 quality management standard. This system monitors every phase of production, from raw material inspection and winding testing to final load tests. Our adherence to international quality protocols helps simplify compliance procedures for engineering procurement teams.
To meet the requirements of the North American market, our NEMA-compliant motors undergo testing for key mechanical and electrical parameters. This testing includes efficiency verification, insulation resistance, starting current, locked-rotor torque, vibration spectrum analysis, and sound pressure level verification. For low-voltage lines, our motors carry UL and CSA certifications.
Our explosion-proof motors are certified to IECEx and ATEX standards, allowing them to be installed in Zone 1, Zone 2, Zone 21, and Zone 22 hazardous environments. Designed to prevent internal ignition from escaping to the surrounding atmosphere, these motors are widely used in chemical plants, oil refineries, and gas handling terminals throughout the European Union and global markets.
With TESTSAFE certification, Wolong motors comply with the requirements of the Australian coal mining industry. This standard helps facilitate the entry of our mining motors into the Australian market and other major mining regions globally.
As industrial automation advances, motor development is moving beyond isolated components toward integrated, intelligent drive systems. The Wolong R&D roadmap focuses on three main technological pathways:
We are expanding the development of Permanent Magnet Synchronous Motors (PMSM), such as the WEPM and TBVF series. By utilizing high-coercivity rare earth magnets and optimized stator geometry, these motors reduce rotor losses and can achieve efficiency ratings that exceed the requirements of IE5, even under partial load conditions.
Modern applications require motor designs that are optimized for high-carrier-frequency VFD operations. We incorporate insulated bearings, such as hybrid ceramic ball bearings, and grounding brushes to prevent electrical discharge damage (shaft currents). Our winding systems also use high-voltage surge-resistant magnet wire to withstand the voltage stress caused by fast-switching VFDs.
By integrating OLI vibration sensors and temperature probes directly into the motor winding and bearing structures, we enable real-time health monitoring. These smart sensor systems track vibration frequencies, temperature anomalies, and insulation deterioration. By feeding this data back to centralized DCS systems, they support predictive maintenance planning and help prevent unplanned operational downtime.
Answers to technical and commercial questions commonly asked by procurement managers and engineers.
High-voltage asynchronous designs, explosion-proof units, and permanent magnet solutions engineered to international standards.
NANFANG
