Engineered for hazardous locations, high-load configurations, and precise frequency control applications.
Shaanxi Nanfang Motor Technology Co., Ltd. is the official authorized distributor of Wolong Electric Drive Group Co., Ltd. Founded in 1984 and listed on the Shanghai Stock Exchange in 2002 (SH600580), Wolong has advanced the boundaries of electric machine design for over three decades. Operating through a robust global network comprising 3 manufacturing bases, 39 state-of-the-art factories, and 3 specialized R&D centers, Wolong remains at the forefront of the industry.
By executing an aggressive global brand integration strategy, Wolong has acquired several of the world’s most prestigious legacy motor manufacturers. This elite portfolio includes ATB Motor Group (Austrian drive specialists), Morley (underground mining drive solutions with a 130-year heritage), Laurence Scott (renowned low starting-current systems and marine generators), Schorch (German high-power, high-voltage equipment established in 1882), Brook Crompton (venerable UK energy-efficient motor pioneer), OLI (the world's market leader in electric vibration motors), CNE (Nanyang Explosion-proof Group, China's largest specialized Ex research and production base), and General Electric's (GE) industrial motor division. This fusion of technical expertise ensures our motors satisfy the most demanding industrial drive and control requirements globally.
Decarbonization, digitization, and ultra-high efficiency driving next-generation motor systems.
The global transition to intelligent industrial environments requires drive systems that offer precise frequency control, lower thermal losses, and integrated condition monitoring. Wolong’s technical roadmap centers on the integration of Permanent Magnet Synchronous Motors (PMSMs) and Variable Frequency Drives (VFDs) to bypass traditional efficiency limits.
We are transitioning our product lines from IE3/IE4 standard asynchronous configurations to IE5 permanent magnet synchronous architectures, yielding up to 50% lower energy losses during partial load operations under VFD control.
Modern drives feature embedded vibration and temperature sensors. By collecting operational harmonics, our software algorithms detect stator insulation breakdown or bearing wear before critical failure occurs.
IGBT/SiC switching inverters subject motor windings to steep dV/dt voltage rises. Our proprietary Class H insulation system resists corona discharge and prevents premature winding failure.
Engineered to deliver high torque, spark-free execution, and operational reliability in harsh environments.
Fully compliant Flameproof (Ex d) and Positive Pressure (Ex p) motors for platforms, chemical refineries, and transmission pipelines. Fully certified to handle Zone 1 and Zone 2 hazardous gas groups.
Heavy-duty Morley conveyor motors and high-voltage asynchronous cutter drives designed for heavy dust loads, shock impacts, and underground coal mine operations.
Laurence Scott low starting-current systems and large-capacity synchronous condensers designed to support utility-scale grid operations and marine auxiliary power distribution.
Inside the structural and material design that delivers reliable industrial performance.
The rotor features a squirrel cage configuration, utilizing centrifugal or high-pressure die-cast aluminum to integrate the bars and end rings into a solid unit. This structural approach ensures mechanical durability and stable torque characteristics under dynamic loads. For larger-capacity drives, copper bar rotors with TIG-welded end rings are utilized. A high-strength retaining ring prevents radial bar expansion at elevated rotational speeds.
Winding coils are wrapped in high-mica content tape, layered with polyester film, and reinforced with glass cloth. Following winding insertion, the stator assembly undergoes the Vacuum Pressure Impregnation (VPI) process with solventless epoxy resin. This process eliminates internal voids, providing protection against moisture ingress, chemical contaminants, and thermal stresses.
Our motor frames are optimized using finite-element multi-physics simulations to manage heat dissipation and structural vibration. Cast in high-tensile gray iron or fabricated steel, the frames feature integrated cooling fins that maintain low winding temperatures and prevent resonant vibrations during inverter-fed operations.
The low-noise ventilation system consists of an aerodynamic fan cover, air guide cylinders, protective mesh, and sound-absorbing lining plates. The side-inlet design maintains optimal airflow even when installed near structural bulkheads, reducing windage losses and acoustic emission levels to meet OSHA standards.
Meeting stringent global regulatory safety, environmental, and performance standards.
To support global projects, Wolong maintains a comprehensive certification matrix. Our engineering and manufacturing processes are validated to ensure compliance with localized requirements, facilitating installation across regional jurisdictions.
Nemko / ATEX
CSA Standard
CE Certification
CCC Standard
SABS Standard
TESTSAFE Standard
Our global market access is built on systematic adherence to regional and international specifications:
Deploying digital twin architectures and automated stator winding lines, Wolong's production facilities integrate modern manufacturing technology with lean production methodologies. By centralizing raw material sourcing (including electrical steel laminations and high-purity copper) and utilizing automated CNC machining centers, we minimize structural dimensional variances and control overall production costs.
Our supply chain model helps mitigate external disruptions. Key benefits of our production infrastructure include:
Key selection parameters for procurement managers and design engineers.
Industrial electric motor procurement requires careful alignment between electrical design parameters and environmental conditions. Over-specifying drives increases capital expenditure, while under-specifying leads to operational downtime. The engineering team at Shaanxi Nanfang Motor recommends evaluating three primary design criteria:
Inverter-fed motors are subjected to high voltage harmonics. It is critical to verify that the motor's winding insulation matches the dV/dt output profile of the selected drive. For frame sizes 280 and larger, insulated bearings or grounding brushes are recommended on the non-drive end to prevent shaft currents from damaging the bearing raceways.
When operating at low speeds under constant torque loads, self-ventilated (IC411) motors experience reduced airflow. For these applications, forced ventilation (IC416) should be specified to maintain motor temperature within the insulation class limits. Water-cooled designs (such as the YBBP water-cooled series) provide quiet operation and efficient heat dissipation in confined spaces.
Motors installed in potentially explosive atmospheres must match the local hazardous zone classification. Specify Ex d (flameproof) containment for Zone 1 environments, while Ex ec (increased safety) or Ex p (positive pressure purge) configurations are suitable options for Zone 2 installations, depending on the explosive gas group present.
Answers to common engineering queries regarding inverter-duty motors and hazardous area deployments.
Providing precise control and heavy-duty reliability for hazardous and harsh industrial operations.
A look inside our motor production lines and QA facilities.
Where our heavy-duty drive systems are deployed around the globe.
Wolong's motor portfolio operates in key industries, providing mechanical drive capacity for fans, water pumps, compressors, and heavy industrial machinery. Our systems support operations across the following sectors:
For forced-draft fans, HVAC systems, and mine ventilation shafts, offering variable speed air flow control to optimize power consumption.
Supporting municipal water supply, chemical processing pumps, and mine dewatering installations that require reliable torque output.
Providing drive systems for high-pressure air and natural gas compressors in refineries, chemical processing plants, and distribution pipelines.
NANFANG
