Explore our core selection of globally certified NEMA & IEC three-phase AC electric motors designed for heavy industrial use.
Shaanxi Nanfang Motor Technology Co., Ltd stands as the premier authorized global distributor of Wolong Electric Drive Group Co., Ltd. Established in 1984 and listed on the Shanghai Stock Exchange in 2002 (code SH600580), Wolong has set standard after standard in the global electric machinery landscape.
With over three decades of systematic expansion and technical evolution, Wolong operates a complex network containing 3 major manufacturing hubs, 39 advanced manufacturing factories, and 4 state-of-the-art Research & Development centers globally. We are dedicated to providing advanced 3-phase industrial motor systems designed for heavy-duty process control, high-efficiency energy conservation, and certified hazardous-environment applications.
Production Lines Globally
Exporting Countries & Regions
Active Patents & Tech Roadmaps
Large-Scale Macro Projects Completed
How Wolong integrated premier global industrial brands to deliver unmatched technical synergy in 3-phase motor engineering.
In 2011, Wolong group acquired 97.94% of the Austrian ATB Group, positioning itself as a primary player in the European drive landscape. Under ATB, brand names like Morley and Laurence Scott merged to reinforce heavy industrial capacity.
Morley Motors: Holding close to 130 years of history in underground coal mining equipment engineering, Morley represents high-specification reliability for environments prone to combustible atmospheres.
Laurence Scott: Known for pioneering low starting-current motor technology for power plants and naval support vessels, this brand has received the Queen's Award for three consecutive years.
Brook Crompton: With over a century of motor development, Brook Crompton has driven energy-efficient designs. Their range features the "W" and "10" series, providing custom speed drive packages for hazardous chemical environments.
Schorch: Integrated into Wolong in 2011, Schorch (established 1882) specializes in high-power drive systems for water treatment, pipelines, tunnel ventilation, steel mills, and marine systems.
OLI Vibration Motors: Since joint business began in 1999, OLI has remained a major player in industrial vibration technology.
Nanyang Explosion-Proof Group (CNE): Acquired in 2015, CNE is China's largest explosion-proof motor R&D base, supplying systems for defense, petrochemicals, and nuclear power generation.
General Electric (GE) Industrial Motors: Acquired in 2018, GE's industrial division provides valuable operational history and technical support for heavy processes like cement, paper, water treatment, and materials processing.
Understanding the transition in global procurement requirements toward carbon-neutral, intelligent, and resilient drive systems.
Decarbonization policies require the adoption of higher efficiency standards. Our development of Permanent Magnet Synchronous Motors (PMSM) and ultra-high-efficiency induction motors reduces carbon output and lowers operational overhead.
Smart factories rely on real-time diagnostic systems. Modern 3-phase systems feature integrated thermal sensors, bearing vibration sensors, and smart interfaces that track operation data to identify fault risks before they cause downtime.
Procurement teams need motors with dual or triple certifications (ATEX/IECEx/CSA/UL/DNV) to standardize equipment designs across multiple international facilities.
A detailed view of the structural design and advanced materials that maximize the lifecycle of our 3-phase motors.
Our squirrel-cage rotors are built using centrifugal aluminum casting or precision die-casting techniques. This merges the rotor bars and end rings into a single piece for reliability and strong starting torque. For heavy-duty high-voltage applications, we use copper bar configurations with welded end rings, complete with protective retaining rings for high-speed operation.
Stator coils are wrapped with high-mica content tapes and reinforced with specialized glass cloth. The completed winding undergoes a strict Vacuum Pressure Impregnation (VPI) process. This eliminates internal voids, providing protection against humidity, chemicals, thermal stresses, and mechanical vibrations.
Engineered using multi-physics structural and fluid finite element analysis (FEA), our frames are cast from high-tensile gray iron or fabricated steel. They provide structural redundancy, heat dissipation, and isolation margins to withstand impact and maintain low vibration levels under full loads.
Featuring a design that integrates the air guide cylinder, protective window, and silencer plates, our low-noise fan systems improve air circulation while dampening noise. With side air inlets, these systems minimize ventilation blockages and carry an IP22/IP23 finger-safe rating.
Our motors are designed, tested, and certified to meet the regulatory requirements of different regions and industries.
Nemko / ATEX
CSA
CE
CCC
SABS
TESTSAFE
Our facilities utilize strict ISO 9001 quality management systems designed for explosion-proof design. Every stage, from sourcing raw materials to final test-bay execution, is tracked and audited.
Designed for North American environments, our NEMA-compliant motors undergo efficiency verification, insulation testing, starting current tests, and torque assessments to meet NEMA MG1 standards.
For applications in hazardous oil, gas, chemical, or dust processing locations, our motors are built to Ex d, Ex de, Ex e, Ex nA, and Ex tb safety standards, meeting ATEX and IECEx directives.
Our drive systems are engineered to power critical processes across demanding global industries.
Providing explosion-proof high-voltage and low-voltage motors for pumps, compressors, and fans operating in Zone 1, Zone 2, Class I Div 1, and Class I Div 2 environments.
Building high-torque, double-shaft, and water-cooled conveyor motors to withstand dust and moisture in underground coal mines and sorting plants.
Supplying low-voltage marine motors with DNV Type Approval, featuring anti-corrosive paint systems, condensation heaters, and specialized insulation to handle salty environments.
Our developmental goals focus on raising energy efficiency, structural density, and control intelligence.
By using rare-earth permanent magnet materials and optimized rotor layouts, our WEPM and associated PMSM series achieve ultra-high efficiency standards, reducing energy losses by 20% to 30% compared to standard induction motors.
Developing drive systems that match motors with custom Variable Frequency Drives (VFDs) ensures optimized harmonics, reduced winding voltage stress, and reliable torque control across wide speed ranges.
By integrating OLI vibration technology and smart diagnostic units directly into the motor housing, we support predictive maintenance schedules connected to cloud-based monitoring networks.
Answering common engineering questions on the configuration, selection, and deployment of 3-phase industrial motors.
VPI completely fills the voids in stator winding slot structures with resin under vacuum conditions, preventing moisture ingress and corona damage. This improves heat dissipation from the slot, increases thermal lifecycle, and enhances structural resistance to mechanical vibration and switching shocks.
ATEX is a mandatory European directive based on safety regulations, while IECEx is an international certification scheme designed to facilitate trade in explosion-proof equipment. Both use similar zone classifications (Zone 1 / Zone 2 for gas, Zone 21 / Zone 22 for dust) and explosion-proof categories (such as Ex d for flameproof, Ex e for increased safety, and Ex nA for non-sparking).
Copper has a higher electrical conductivity than aluminum, which reduces rotor I2R losses, increases motor efficiency, and allows for cooler running temperatures under high-load conditions. Copper-bar rotors are suited for large high-voltage motors, high-speed drives, and applications requiring frequent, heavy-duty starts.
DNV Type Approval indicates that the motor has been tested and approved for installation on ships and offshore units. This ensures the frame design, shaft materials, insulation, terminal boxes, and surface protection can handle high ambient temperatures, vibration, humidity, and salty marine atmospheres.
Browse our advanced selection of permanent magnet synchronous motors, explosion-proof variable frequency drives, and heavy-duty water pump systems.
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