Select heavy-duty explosion-proof, marine, and high-efficiency synchronous motors from our core manufacturing portfolio.
Shaanxi Nanfang Motor Technology Co., Ltd. serves as the premier authorized distributor for Wolong Electric Drive Group Co., Ltd. Established in 1984 and listed on the Shanghai Stock Exchange in 2002 (code SH600580), Wolong has advanced the boundaries of motor design and electric drive technologies for over three decades.
Today, Wolong operates a massive industrial network comprising 3 major manufacturing bases, 39 state-of-the-art factories, and 3 global R&D centers. Strategically specializing in heavy industrial motors, control systems, and high-performance copper winding solutions, Wolong's global reach delivers engineering excellence to petrochemical plants, coal operations, maritime transportation, and major power utilities worldwide.
Navigating the technical requirements, economic constraints, and efficiency priorities of modern industrial electrification.
Industrial applications demand high-grade copper windings due to copper's superior electrical conductivity (101% IACS) compared to aluminum. This delivers smaller core sizing, lower operational temperatures, and extended winding service life, helping engineering teams reduce size constraints in confined spaces.
While copper windings involve higher initial capital expenditures, their lower energy dissipation profiles yield continuous cost reductions. Over a typical 15-to-20-year cycle, energy consumption accounts for over 95% of a motor's TCO. IE4 and IE5 copper motors systematically lower these utility expenses.
Shaanxi Nanfang Motor secures raw copper and raw materials through structured long-term supply agreements. This vertical supply integration shields global buyers from raw metal price volatility, guaranteeing predictable pricing, stable manufacturing runs, and consistent lead times.
Through strategic global acquisitions and alliances, Wolong has integrated centuries of high-end European and American engineering experience.
Acquired in 2011, Austria's ATB Group brought premium European engineering to the portfolio. This integration included Morley, a brand with a 130-year history in underground mining drives. Our heavy-duty mining machinery operates reliably in demanding sub-surface applications worldwide.
Brook Crompton's design legacy of energy-efficient low-voltage electric motors supports our green industrial solutions. This complements Schorch (acquired in 2011, active since 1882), which provides custom high-power drive packages for major pipelines and high-capacity water facilities.
Laurence Scott delivers low starting current designs for critical naval vessels and power facilities. OLI specializes in global vibration motors, and our joint manufacturing agreements with General Electric (GE) support demanding petrochemical applications across international markets.
A technical breakdown of the structural components that drive our high-performance industrial motors.
Our rotors employ a rugged squirrel cage design optimized for mechanical durability. Standard systems utilize cast aluminum rotors produced via die-casting or centrifugal casting to create integrated rotor bars and end rings. For high-capacity or high-speed operations, we integrate custom-welded copper bar rotors. These use advanced end-ring welding and protective retaining rings to withstand severe mechanical stresses and deliver high starting torque.
The stator coils are wound using high-purity copper wire insulated with polyester film and glass-reinforced, high-content mica tapes. The complete stator core undergoes a computerized Vacuum Pressure Impregnation (VPI) cycle with solventless resins. This process eliminates internal air gaps, reinforcing the assembly against moisture, mechanical vibration, and electrical breakdown while improving thermal conductivity to the motor frame.
The structural frame is engineered using multi-physics finite element analysis (FEA) to optimize thermal dissipation and structural integrity. Cast in high-tensile gray iron or welded structural steel, the frame absorbs external vibration and stands up to physical shock. Designed with balanced resonance margins, it isolates internal magnetic frequencies to ensure smooth operation across variable speed ranges.
The low-noise ventilation system integrates an aerodynamically optimized fan cover, protective screen, internal air guides, and acoustic baffles. Side-entry air intakes minimize noise from airflow transitions, while dampening materials suppress fan noise. The system is rated IP22, preventing accidental contact with rotating blades while maintaining consistent, high-volume cooling.
Our manufacturing and testing frameworks adhere to global standards to support project installations worldwide.
ATEX
CSA
CE
CCC
SABS
TESTSAFE
All manufacturing operations run under ISO 9001 audits. Our explosion-proof motor facilities maintain strict traceability and quality controls, ensuring each flameproof enclosure is certified for hazardous zone operation.
To support North American projects, we supply NEMA frame motors tested for starting torque, breakdown torque, efficiency, and temperature rise. Our process-industry lines are designed to meet IEEE 841 severe-duty standards.
For mining and hazardous plants in Europe and APAC, our products carry ATEX directives and IECEx certificates. Our TESTSAFE compliance supports mining equipment exports directly to Australian mining facilities.
How our R&D roadmap is addressing the requirements for energy efficiency, smart system integration, and reduced carbon footprints.
By optimizing slot fill factors, using electromagnetic grade steel laminations, and applying high-purity copper windings, we are expanding our IE5 portfolio to help plants meet demanding emission regulations and lower lifetime electricity costs.
For high-torque, variable-speed applications, we are combining high-conductivity copper cages with permanent magnet synchronous rotors (PMSM). This hybrid approach maintains peak efficiency even when operating at partial loads.
Our current motor designs can be equipped with integrated vibration sensors, stator winding RTDs, and bearing temperature detectors. Connecting these sensors to edge-computing diagnostics helps prevent unexpected failures in continuous process plants.
Providing reliable performance across critical processes and challenging environmental conditions.
Explosion-proof motors (such as the YBX3 and YBBPX series) power critical compressors, pumps, and fans in refinery zones. These motors feature robust flameproof clearances and chemical-resistant coatings to ensure safe, continuous operation.
Our specialized flameproof mining motors (such as the YBK3 and YBSS series) drive conveyor systems, shearers, and ventilation fans. These systems are designed to operate reliably in high-dust, high-moisture underground mining environments.
For offshore platforms and maritime vessels, we manufacture marine motors (such as the YQ series) certified by DNV. Protected by anti-corrosive marine paint and seawater-resistant seals, they operate reliably in harsh saline environments.
Wolong operates 39 production plants and 4 technical research centers across China, Vietnam, the UK, Germany, Austria, Italy, Serbia, Mexico, and India. This global footprint ensures reliable component logistics, regional support, and localized certification testing.
Key technical answers for procurement officers and engineering leads specifying large motor platforms.
Our motors utilize Class F insulation systems with Class B temperature rise limits, designed for a nominal operating life of over 100,000 running hours. Combining VPI processing with premium mica tape helps protect the copper windings against moisture and dust ingress, extending service life in demanding environments.
Each explosion-proof motor model undergoes comprehensive testing by international third-party certification bodies (including PTB, Nemko, and CQST). Testing protocols include hydro-pressure casing tests, flame transmission tests, and thermal limit evaluations to ensure safe operation in hazardous atmospheres.
Yes. Utilizing Laurence Scott's low starting current design methodologies, we custom-engineer medium- and high-voltage motors to meet strict grid starting-current limitations. This helps prevent voltage drops on weaker power grids without requiring expensive variable frequency drives.
Every shipped motor is accompanied by a quality record package. This includes factory routine test reports (covering winding resistance, insulation resistance, no-load tests, and vibration checks). Upon request, we can coordinate witnessed type tests, including full-load heat runs, sound level measurements, and torque-speed curves, prior to dispatch.
High-efficiency, variable frequency, and dust-protected industrial motors designed for severe service duties.
Discuss customized electrical parameters, frame options, specific certifications, or scheduled factory audits directly with Shaanxi Nanfang Motor's engineering division.
NANFANG