Engineered to optimize thermal efficiency and system integrity in heavy-duty oil, gas, chemical, and mining applications.
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 in 2002 (code SH600580). After more than 30 years of development, Wolong has 3 manufacturing bases, 39 factories, and 3 R&D centers worldwide now.
Wolong has always focused on the manufacture of motors and control systems, committed to a global brand strategy, making Wolong a leader in R&D, technology, process, manufacturing, and sales in the global market.
Through strategic global integration, Shaanxi Nanfang Motor Tech and Wolong bring together historical leadership and robust engineering capabilities.
Accumulated with abundant assets and brilliant experiences in manufacturing, WOLONG started to reach for higher attempts. To be the leading manufacturer of AC motors & drives worldwide, WOLONG strove to acquire overseas groups. In 2011, WOLONG successfully acquired 97.94% of the Austrian ATB Group (ATB motor), one of the three major European motor manufacturers, becoming the actual controller of the ATB Group. The ATB Motor Group included key brands such as Morley in the mining industry and Laurence Scott, reinforcing Wolong's technical leadership globally.
Morley motor, with its nearly 130-year history, has been closely linked to underground coal mining, and has become synonymous with quality, power, and reliability. Laurence Scott, the pioneering company that supplied motors for British nuclear power plants, is renowned for manufacturing equipment with low starting currents, also equipping British naval vessels with generators. Following its acquisition by WOLONG, Laurence Scott has been honored with the Queen's Award for three consecutive years.
Brook Crompton Motors stands as a venerable and profoundly skilled participant within the electric motor sector, boasting over a century of mastery. As a pioneer in the creation of energy-efficient motors, Brook Crompton has developed a complete range of low, medium, and high voltage AC motors, including the premium "W" and "10" series, and adjustable speed drive packages designed for harsh industrial sites.
Joining WOLONG in 2011, Schorch has set the standard for high-quality motors. The company offers a diverse range of drive systems to customers globally, catering to large-scale infrastructure projects including oil and gas, chemicals, power generation, water supply, wastewater management, shipbuilding, and tunnel ventilation.
Dating back to 1999, WOLONG started a joint venture with OLI vibration motors, acquiring the largest global market share in vibration technologies. In 2015, CNE (China's largest explosion-proof motor scientific research and production base) joined WOLONG. This strategic cooperation allows Nanyang Explosion Group to supply specialized, low-voltage asynchronous, and high-voltage ex-proof motors to oil, coal, chemical, military, and nuclear fields.
In 2018, General Electric's commercial and industrial motor division joined the ranks of WOLONG. As a historic manufacturer of commercial and heavy industrial electrical equipment, GE's deep engineering footprint in oil, gas, chemical, power generation, and steel processing industries provides Wolong with robust technical backing, establishing its global dominance.
Addressing macro-industry challenges with optimized AC motor cooling solutions designed for continuous, high-load industrial processes.
We provide a comprehensive range of explosive gas and dust certifications (Zone 1, Zone 2, Zone 21, and Zone 22) tailored to survive aggressive oil and gas refineries and hazardous chemical factories.
Available in IE3, IE4, and Ultra-Premium IE5 energy classifications. Our Permanent Magnet Synchronous Motors (PMSM) guarantee significant reduction in carbon emissions and electricity overheads.
Covering low, medium, and high voltage drive configurations integrated with custom air-to-air (IC611), air-to-water (IC81W), or force-cooled (IC416) AC motor coolers to suit custom process needs.
In modern heavy industry, continuous uptime is direct linked to profitability. Unplanned shutdowns in petrochemical operations, mine ventilations, or gas transport pipelines are extremely expensive. As motors scale in power to deliver megawatts of torque, thermal management becomes critical. Motor AC Coolers act as the dynamic heat extraction mechanism that maintains winding temperatures below insulation class ratings, eliminating thermal runaways.
Procurement teams globally face the challenge of sourcing reliable drive solutions that comply with multiple regulatory frameworks. Shaanxi Nanfang Motor and Wolong resolve this conflict by offering factory-fitted, simulated thermal exchangers that are standardized to fit NEMA and IEC frames. Our global supply chain ensures that whether your project is located in the North Sea, Middle Eastern deserts, or Australian coal basins, we deliver localized engineering support and localized documentation.
Inside the high-strength materials and advanced fluid dynamics designed by Wolong’s global R&D institutes.
The rotor features a modern squirrel cage design, with cast aluminum rotors being widely utilized. Produced using either centrifugal aluminum casting or die-casting techniques, molten pure aluminum is poured into the slots of the rotor core, resulting in a single-piece construction that integrates the rotor bars and end rings.
This structural integrity guarantees high reliability and outstanding torque properties. For larger capacity motors, copper bar rotors are employed, benefiting from dependable bar securing and advanced end-ring welding procedures. Additionally, the protective ring design of high-speed motors further ensures the reliable operation of the copper bar rotor under heavy dynamic loads.
The winding coil is crafted from premium polyester film and reinforced with high-density glass cloth. It utilizes low-powder mica tape with a high mica content or medium-powdered mica tape with an abundance of mica to ensure optimal dielectric strength.
Following the VPI (Vacuum Pressure Impregnation) process, a pristine white coil emerges from the production line. Once the billet is extracted, the entire stator core undergoes the VPI cycle to become a solid, moisture-impervious unit. This insulation structure is meticulously engineered to provide exceptional electrical performance, high mechanical strength, resistance to chemical moisture, and long-term thermal stability.
The motor frame design employs a fully digital platform for structural and fluid multi-physics field simulations. This simulation platform retains the original patents of legacy brands, utilizing mature, high-strength cast iron or structural steel as an alternative.
The frame boasts exceptional structural redundancy, outstanding heat dissipation properties, and ample inherent frequency isolation margins to prevent resonant vibration. It is engineered to endure significant mechanical shocks, maintain a low vibration level, and ensure lower temperature increases throughout continuous load cycles.
The low-noise fan cover system comprises a fan cover body, an air guide cylinder, a protective window, and a silencer plate. Its compact structure and lightweight design facilitate vibration reduction. The air inlet is situated on the side, optimizing flow path and preventing blockage.
This layout minimizes adverse effects on ventilation and reduces noise caused by energy loss during air propagation. The system also incorporates advanced sound-absorbing materials that lower the overall motor noise signature. Additionally, the fan cover is rated IP22, preventing accidental contact with the rotating fan blades.
Leveraging localized expertise across global industrial hubs to provide robust engineering solutions.
Wolong has established state-of-the-art motor and drive control R&D centers in China, Europe, and Japan, complemented by a Central Research Institute in Shanghai. This unified network is committed to researching leading technologies in the field of high-voltage industrial drives, smart variable frequency systems, and advanced cooling technologies.
As a global leader, Wolong's explosion-proof products offer significant advantages in reliability, flame containment, and long lifespan. They are widely used in critical operations such as underground mining, petrochemical plants, and marine drillships.
Ensuring complete regulatory alignment across every global market, jurisdiction, and project environment.
Nemko / ATEX
CSA Standard
CE Conformity
CCC Mark
SABS South Africa
TESTSAFE Australia
WOLONG adheres to a comprehensive marketing and certification strategy covering the entire electric motor value chain. By securing certifications for international trade corridors, we facilitate swift customs clearance and local installation approvals.
ISO 9001 Quality Framework: Wolong’s production facilities operate under ISO 9001 certified quality control systems. This ensures every AC motor cooler, stator winding, and explosion-proof terminal box undergoes rigorous testing.
NEMA & CSA Standards: To verify compliance with North American standard specifications, we perform extensive mechanical performance, efficiency, insulation resistance, and starting current tests. Wolong's low-voltage and medium-voltage motors carry certified UL and CSA marks.
ATEX & IECEx Compliance: For gas and dust hazardous areas, Wolong provides dual-certified IECEx and ATEX motors, designed to safely operate in highly explosive environments across the EU and globally.
TESTSAFE Scheme: As one of the largest safety testing systems, securing TestSafe certification allows Wolong's coal mining motors to easily enter the Australian market, verifying our robust engineering on a global scale.
Next-generation thermal architectures and AI-driven status diagnostics for low and high voltage drive technologies.
The performance limit of electric drive units is restricted by heat. As current flows through stator windings, resistive losses generate thermal energy that must be dissipated to prevent insulation aging. Wolong is currently leading the transition from static cooling (IC411) to active smart cooling. By integrating thermal and vibration sensors directly into the cooling system, our smart coolers automatically adjust fan speeds based on real-time winding data. This closed-loop thermal control significantly improves energy efficiency during variable-frequency operation.
Furthermore, our development pathway includes low-noise flow dynamics designed using high-fidelity CFD (Computational Fluid Dynamics) simulations. These designs maximize heat dissipation while minimizing acoustic pressure. This helps operators meet strict environmental regulations and ensures safe noise thresholds in underground mines and offshore oil platforms.
WOLONG’s advanced drive systems support critical equipment globally. Key applications include centrifugal compressors, large-scale ventilation fans, heavy-duty slurry pumps, and high-torque conveyor drives. Our motors are integral to offshore platforms, onshore petrochemical processing, water management networks, marine propulsion systems, and automated steel processing lines.
Technical answers to help engineering and procurement teams make informed decisions.
The cooling configuration defines how hot air is extracted. In flameproof (Ex d) or increased safety (Ex e) motors, the thermal design ensures outer frame temperatures remain below the auto-ignition threshold of surrounding explosive gases or dusts. Utilizing certified IC411 (self-cooling) or IC416 (forced air cooling) systems ensures the motor operates within certified temperature limits.
For larger medium and high voltage motors, copper bar rotors offer higher electrical conductivity, resulting in lower rotor I²R losses and higher overall efficiency. When paired with high-quality welding processes, copper bar rotors can withstand higher thermal stresses during heavy start cycles, making them ideal for heavy conveyors and grinders.
Vacuum Pressure Impregnation (VPI) removes air pockets and moisture from the stator slot windings. The resin penetrates deep into the mica tapes, creating a solid, highly conductive path that prevents partial discharges and winding failures in humid or chemically aggressive environments.
PMSM motors are recommended for applications requiring premium efficiency (IE4/IE5) and variable speed control. By eliminating rotor copper losses, PMSMs run cooler and offer high torque density, lowering operating costs in high-duty operations.
Multi-physics simulations model both structural strength and air flow paths. This enables engineers to optimize cooling fin geometry and identify resonance frequencies, preventing structural failure and ensuring the frame can withstand high mechanical stress.
By securing regional certifications such as TestSafe for Australia, SABS for South Africa, and ATEX for Europe. Shaanxi Nanfang Motor and Wolong ensure our motors are designed and tested to meet local regulatory safety standards.
Heavy-duty drive components designed to perform in extreme environments.
NANFANG
