Global Industrial Drive Excellence: Premium 3-Phase Low & High Voltage Induction Motors engineered for harsh, explosion-proof, and mining application scenarios.
A global brand strategy pioneer driving high-efficiency electrical equipment to 58+ countries worldwide.
Shaanxi Nanfang Motor Technology Co., Ltd stands as the authorized flagship distributor of Wolong Electric Drive Group Co., Ltd (SH600580), a global force in motor manufacturing and control solutions since 1984. Wolong's international operational footprint includes 3 global manufacturing bases, 39 advanced manufacturing factories, and 3 localized research and development centers in China, Europe, and Japan.
By integrating European precision design with Chinese manufacturing scale, Wolong has solidified its status as an industry leader in R&D, process reliability, safety certification, and distribution. We specialize in custom OEM 3-phase induction motors that perform reliably under complex stress conditions, serving demanding industries such as mining, petrochemicals, energy production, marine transportation, and heavy manufacturing.
How our domestic manufacturing capabilities drive global quality compliance, thermal margins, and economic efficiency.
From local sourcing of high-permeability cold-rolled silicon steel sheets to high-purity copper wires and precision cast-iron frames, China's industrial ecosystem supports rapid customization, stable raw material pricing, and accelerated delivery schedules.
Our facilities employ automated coil winding, CNC coil insertion, and high-vacuum pressure impregnation (VPI) equipment. Using premium mica tapes and polyester films, this process ensures void-free insulation with high dielectric strength and heat dissipation.
Every motor undergoes comprehensive testing before shipment, including dynamic balance testing, stator surge voltage analysis, insulation resistance measurement, load testing, and vibration analysis. All procedures comply with ISO 9001 and IECEx protocols.
Integrating globally recognized industrial motor brands under one central R&D framework.
Acquired by Wolong in 2011, Austria-based ATB is a leading manufacturer of European industrial motors. Under its umbrella, Morley holds a 130-year heritage in underground coal mining applications, delivering flameproof motors that operate reliably in high-stress, explosive mining environments.
Established in 1882, Schorch sets safety and performance standards for heavy industry motors. Laurence Scott specializes in custom-designed low-starting-current generators and motors for nuclear power stations, municipal water management, and naval defense vessels.
Brook Crompton develops energy-efficient low, medium, and high-voltage AC motors (including the Brook Crompton "W" and "10" series). In partnership with OLI since 1999, Wolong also manufactures rotary electric vibrators and high-frequency vibrator systems.
In 2015, CNE—China's largest explosion-proof research and production center—joined Wolong Group. In 2018, Wolong acquired General Electric's (GE) commercial and industrial motor division, integrating GE's engineering experience across oil and gas, power generation, and chemical processing.
How Shaanxi Nanfang Motor resolves common challenges for international EPC buyers and engineers.
1. Standards Mapping & Alignment: Global projects often operate across different engineering frameworks, requiring careful alignment between IEC (metric) and NEMA (imperial) dimensional standards, mounting configurations, and performance ratings. We verify cross-compatibility during the initial engineering review phase.
2. Hazardous Area Certification: Operating in hazardous environments requires proper explosion-proof protection. We offer motors certified under global explosion-proof schemes—including ATEX, IECEx, CSA, SABS, and TESTSAFE—to comply with local regulations.
3. Variable Frequency Drive (VFD) Optimization: Modern industrial operations require precise frequency and torque control. We configure stator slot geometries, insulation classes, and thermal protection to match the specific VFD frequency range, preventing premature motor failure from voltage spikes.
4. Custom Shaft & Mounting Configurations: Special application footprints often require non-standard shaft extensions, double-shaft configurations, or specialized flange mountings. Our engineering team provides custom solutions for both retrofit installations and new projects.
5. Severe Duty & Extreme Environments: Standard motors can fail prematurely when exposed to high moisture, abrasive coal dust, salt spray, or extreme temperatures. We construct motors using IP55/IP66 cast-iron enclosures, marine-grade epoxy coatings, and stainless steel fasteners to ensure long-term durability.
6. Supply Chain Integrity & Logistics: Coordinating the transport of large, heavy motors requires reliable logistics management. Shaanxi Nanfang Motor handles end-to-end shipping, custom packaging, protective framing, and documentation to ensure safe arrival on-site.
7. Long-term Lifecycle Support: Continuous industrial operations depend on access to spare parts, maintenance documentation, and technical support. Backed by Wolong's global service network and authorized distributors, we provide on-site technical support, original replacement parts, and maintenance consulting.
Engineered for low vibration, low thermal stress, and high energy efficiency.
Features a squirrel-cage design with cast aluminum rotors produced via centrifugal aluminum casting or die-casting techniques. For larger capacity systems, we utilize copper bar rotors with welded end rings. High-speed models include integrated protective retaining rings to secure copper bars against centrifugal stresses.
Stator coils are wrapped with high-mica content tape, polyester film, and glass cloth. Following the winding process, stators undergo Vacuum Pressure Impregnation (VPI) using solventless resin. This provides Class F or Class H thermal ratings, moisture resistance, and mechanical protection.
Engineered using multi-physics structural and fluid finite element simulations. The cast-iron (or fabricated steel plate) frame features deep cooling ribs for efficient heat dissipation, structural rigidity to absorb mechanical shocks, and vibration dampening.
The system consists of an aerodynamic fan cover, air guide cylinders, protective grilles, and noise-damping silencer plates. Featuring a side-inlet design that reduces turbulence and noise, the assembly meets IP22 protection ratings to prevent accidental contact with the fan.
Providing fully compliant electrical equipment that overcomes trade barriers and complies with safety regulations.
Wolong and Shaanxi Nanfang Motor maintain an active certification portfolio, enabling global distribution across Europe, North America, Africa, Australia, and Asia.
Nemko / ATEX
CSA
CE
CCC
SABS
TESTSAFE
ISO 9001 Ex Standard: Wolong's manufacturing plants operate under an ISO 9001 certified quality management system. Strict documentation control and traceability from raw materials to final assembly provide consistent quality and reliability.
NEMA & UL/CSA Standard Compatibility: Testing protocols verify electrical characteristics, start currents, torque profiles, and insulation resistance to confirm mechanical and electric performance parameters comply with North American markets.
IECEx & ATEX Explosion-Proof: Essential for safe operation in explosive atmospheres, such as petrochemical installations and gas distribution stations. Design parameters are matched to temperature limits (T1-T6) and gas/dust hazard groups.
TESTSAFE Standards: The TESTSAFE certification enables compliance for coal mining motors exported to the Australian market, ensuring flameproof protection levels align with local underground safety regulations.
How our 3-phase induction motors are configured to meet the demands of major industrial operations.
| Industrial Sector | Typical Applications | Key Challenges Addressed | Recommended Solutions & Wolong Motor Series |
|---|---|---|---|
| Oil & Gas / Petrochemicals | Centrifugal pumps, screw compressors, fan assemblies, process fluid pumps. | Hazardous atmospheres, presence of volatile hydrocarbon gases, continuous 24/7 run times. | WEBP3 variable frequency, YBX3 low-voltage Ex-proof, YBXKK high-voltage explosion-proof motors. |
| Mining & Minerals | Underground conveyor belts, ball mills, slurry pumps, ventilation shafts, tunnel boring machines. | Abrasive dust, mechanical shock loads, high starting torque requirements, coal mine gas hazards. | YBSD flameproof conveyor motors, YBU/YBUS/YBUD tunnel boring machine motors, Morley series. |
| Water & Wastewater | Submersible pumps, raw water intake pumps, aeration systems, high-volume irrigation pumps. | High humidity, corrosion risks, constant load, seasonal variations in load demand. | YBRB series flameproof water pump motors, WE3 high-efficiency series. |
| Marine & Naval Defense | Main propulsion drives, deck winches, thrusters, auxiliary generators. | Saline corrosion, high ambient temperatures, vibration, low starting currents. | Laurence Scott specialized generators, custom low-voltage high-torque marine induction motors. |
| Power Generation & Nuclear | Boiler feed pumps, cooling tower fans, auxiliary oil pumps, excitation system motors. | Strict reliability requirements, high temperature ratings, low maintenance schedules. | TAW series brushless synchronous excitation motors, YZYKK series high-voltage positive pressure motors. |
Key trends shaping the future of global industrial powertrains.
Global regulatory bodies are increasing efficiency requirements. Wolong's permanent magnet synchronous motors (like the WEPM series) integrate stator design with rotor magnets to reduce electrical losses, helping operations meet IE4 and IE5 standards.
Smart factory integration requires continuous motor monitoring. By incorporating vibration sensors (like OLI Ex sensors) and thermal RTDs, operators can track real-time conditions, predict maintenance needs, and reduce unscheduled downtime.
Modern plants utilize combined inverter-motor systems. Designing motors to match variable speed drives (VSD) prevents high voltage spikes, limits harmonic distortion, and maintains torque performance across different operating speeds.
Answers to common technical, design, and regulatory questions from procurement managers and engineers.
Asynchronous induction motors operate via slip, where the rotor rotates slower than the stator's rotating magnetic field, inducing current in the rotor. They are robust, require minimal maintenance, and are widely used in general industry. Permanent magnet synchronous motors (PMSM) synchronize the rotor rotation with the stator field using rare-earth permanent magnets. PMSMs offer higher efficiency (reaching IE4/IE5 standards), higher power density, and better torque control at lower speeds, though they require a compatible variable frequency drive (VFD).
The VPI process places the wound stator core into a vacuum chamber to remove air, moisture, and microscopic voids. Solventless epoxy or polyester resin is then introduced under pressure, filling all gaps in the mica tapes and slots. This creates a solid composite winding structure that improves thermal conductivity, provides moisture resistance, stabilizes windings against mechanical vibration, and enhances dielectric strength, helping prevent premature stator failures.
Mining applications require robust construction to handle coal dust, moisture, and potential methane hazards. Flameproof enclosures (Ex d or Ex db) are designed to contain any internal explosion without propagating it to the surrounding atmosphere. Key features include heavy-duty cast iron frames, labyrinth shaft seals (IP55/IP66 protection), flamepath joint tolerances, explosion-proof terminal boxes, and internal thermistors to monitor winding temperatures, helping prevent high surface temperatures that could ignite dust or gas.
Yes. By integrating international brands like ATB, Brook Crompton, Schorch, and GE Industrial Motors, Wolong's factories manufacture products that comply with both European metric (IEC) and North American imperial (NEMA) standards. Frame sizes, mounting foot configurations, shaft diameters, and terminal box placements are designed to match standard configurations, enabling direct drop-in replacements for existing installations.
We conduct testing at our authorized test stations using dynamometer systems. Standard protocols measure starting torque, breakdown torque, efficiency curves across various loads (25%, 50%, 75%, 100%), temperature rise, and power factor. Type test certificates and data sheets can be provided to the purchasing company during inspection before shipment.
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