High-efficiency, custom-engineered high-voltage and flameproof electric motors compliant with global safety standards.
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 (stock code: SH600580). Over more than 30 years of sustainable growth and technological leadership, Wolong has expanded its footprint globally, operating 3 manufacturing bases, 39 factories, and 3 state-of-the-art R&D centers worldwide.
Our commitment is centered on the production of top-tier electric motors and control systems. Driven by a global brand strategy, Wolong holds a dominant position in R&D, process manufacturing, and worldwide sales, helping clean and efficient energy systems run flawlessly across diverse industrial contexts.
Empowering global infrastructure through massive capacity, innovative technologies, and certified electric machinery.
The industrial landscape is undergoing a massive shift towards zero-emission and highly efficient power transmission systems. High Voltage (HV) and Medium Voltage (MV) electric motors are the backbones of this transition. Modern heavy industries, including oil and gas refining, chemical processing, maritime operations, and massive municipal water systems, demand driving equipment that delivers high efficiency, reliability under mechanical stresses, and compliance with the strictest safety standards.
Key global trends pushing the boundaries of HV motor technologies include:
Deploying certified, ultra-efficient power conversion designs custom-tailored for dangerous environment execution.
Different kinds of Ex certificates are available for your local industry and regulatory market. Fully certified explosion-proof parameters guarantee risk mitigation in Class I/II Div 1 and Zone 1/2 operations.
IE5, IE4, and IE3 efficiency classes are readily available. We specialize in providing highly responsive Permanent Magnet Synchronous Motors (PMSM) that optimize speed curves under varying dynamic industrial loads.
A rich, integrated product line covers low, medium, and high voltage needs. Our catalog spans custom slip-ring designs, squirrel cage induction structures, and customized marine/explosion-proof propulsion packages.
Our modern manufacturing facilities utilize Factory 4.0 smart automation. By implementing digital twin engineering, fully automated robotic winding, automated VPI (Vacuum Pressure Impregnation) units, and real-time cloud production tracking, our factories achieve incredible manufacturing consistency.
Why procurement professionals trust our supply chain resilience:
Wolong's relentless strategy of global brand acquisition has integrated centuries of industrial design craftsmanship, electrical engineering patents, and specialized application expertise into a single powerful network.
WOLONG acquired 97.94% of the Austrian ATB Group, one of the three major European motor manufacturers, becoming the actual controller of ATB. ATB motor group included renowned brands such as Morley in the mining sector and Laurence Scott in heavy duty power generation systems.
Morley Motors holds nearly 130 years of history in underground coal mining drives, serving as a global benchmark for safety and high-load torque. Laurence Scott, the pioneer supplying nuclear power plant motors in the UK, manufactures custom drives with remarkably low starting currents and provides specialized generators for naval vessels.
Established in 1882 in Germany, Schorch has defined quality in premium drive systems. Serving global projects across oil, petrochemicals, power generation, wastewater, shipbuilding, and metallurgical test stations, Schorch enhances Wolong's German engineering precision.
Brook Crompton has over a century of mastery in designing energy-efficient motors. By joining Wolong, they integrated their complete line of low, medium, and high voltage AC motors (including the premium Brook Crompton 'W' and '10' series) for hazardous industrial locations.
China's largest explosion-proof research and manufacturing base joined the Wolong Group, securing the leading position in Ex-proof heavy machinery for domestic and export sectors in petroleum, chemistry, coal mining, metallurgy, and nuclear power plants.
GE's commercial and industrial motor division partnered with Wolong. As a historical pillar of electric power systems in the United States, GE's design resources and engineering technology elevate Wolong's capability in heavy materials processing, metallurgy, and water treatment systems.
A structural deep-dive into the critical components that define the durability and thermal resistance of our HV machinery.
Our motor rotors feature the industry-standard squirrel cage design. Heavy-duty cast aluminum rotors are manufactured using centrifugal aluminum casting or die-casting techniques, locking molten pure aluminum into the slots of the rotor core to form a single, robust piece that integrates the rotor bars and end rings.
For larger capacity high-voltage motors, copper bar rotors are employed, featuring advanced bar securing and precision end-ring welding procedures. The protective ring design of high-speed motors ensures the reliable operation of the copper bar rotor under heavy centripetal stresses.
Stator coils are crafted using premium polyester film reinforced with glass cloth, integrating low-powder mica tape with high mica content or medium-powdered mica tape. After wrapping the coils onto the stator core slots, the stator assembly undergoes the VPI (Vacuum Pressure Impregnation) process.
This process extracts air and moisture from the slots, injecting high-grade resin under pressure, which cures into a rock-solid, moisture-proof winding system. This ensures exceptional electrical performance, mechanical strength, moisture resistance, and thermal stability in demanding utility operations.
Our motor frames are engineered using a digital platform for structural and fluid multi-physics field simulations. This allows design engineers to optimize the heat-dissipating rib layouts and structural configurations of high-strength cast iron (or alternative fabricated structural steel).
The frame boasts exceptional structural redundancy, heat dissipation properties, and inherent frequency isolation margins, minimizing the risk of resonance during operation. This structural design enables the motor to endure significant mechanical shocks and maintain low vibration levels.
The low-noise fan cover system consists of a fan cover body, an air guide cylinder, a protective window, and a silencer plate. Its compact structure and lightweight design reduce vibration. The side air inlet avoids obstacles behind the motor, minimizing adverse effects on ventilation and reducing noise caused by energy loss during propagation path changes.
The system also incorporates sound-absorbing materials that absorb noise, lowering the overall motor noise. Additionally, the fan cover is rated IP22, ensuring that hands cannot come into contact with the fan.
Wolong electric motors and drive systems are tested and certified by recognized testing laboratories to facilitate seamless entry into your local market.
By adhering to a comprehensive manufacturing strategy across the electric motor supply chain, Wolong has secured the product certifications required to enter international markets:
Wolong's motors are built to deliver performance across diverse industrial applications globally.
Explosion-proof motors drive large compressors, pumps, and fans safely in environments with volatile gases and ambient temperatures, minimizing the risk of ignition.
Our heavy-duty conveyor motors are built to withstand high levels of dust, moisture, and extreme vibration, providing high torque to move material continuously.
High-voltage asynchronous induction motors drive large water supply pumps, cooling tower fans, and municipal sewage installations with optimized energy efficiency.
Common technical questions and answers for engineers, plant operators, and industrial procurement managers.
Discover our high-voltage AC motors, explosion-proof units, and specialized drive configurations.
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