Explore our certified explosion-proof, high-efficiency, and brushless synchronous low speed electric motors designed for heavy industries.
Your Authorized Pathway to Wolong Group's Global Manufacturing Excellence.
As the authorized primary distributor of Wolong Electric Drive Group Co., Ltd. (founded in 1984, listed on the Shanghai Stock Exchange in 2002 under code SH600580), Shaanxi Nanfang Motor Technology Co., Ltd. supplies industrial giants worldwide with elite-tier mechanical driving systems. Wolong operates a sprawling international footprint containing 3 primary manufacturing bases, 39 state-of-the-art factories, and 3 global R&D centers.
With an unyielding commitment to direct global brand strategies, Wolong has unified pioneering research, sophisticated fabrication processes, and cross-border commercial channels to lead the global market. Our custom low speed electric motor lines are engineered specifically to provide reliable torque density in challenging work sites, bypassing unnecessary mechanical gearboxes and improving efficiency in mining, tunnel excavation, and high-safety petrochemical zones.
Our engineering capabilities scale across the globe, bringing century-old European brand heritage directly to your heavy-duty OEM projects.
How modern OEMs leverage direct-drive permanent magnet motors to achieve carbon neutrality and operational reliability.
Traditional setups rely heavily on gearboxes to step down speeds while magnifying torque output. Direct-drive configurations couple the low speed electric motor directly to the load. Eliminating the gearbox minimizes mechanical transmission losses, reduces fluid hazard potentials, and optimizes space utilization in congested designs like underground coal cutters and marine propulsion shafts.
By integrating rare-earth magnets into low speed rotors (PMSM and TBVF series), manufacturers maintain high magnetic flux densities without rotor copper losses. This synergy delivers exceptional efficiency ratings (IE4 and IE5) even when rotating at fractions of typical asynchronous operating speeds. It represents a paradigm shift for high-inertia start-up devices.
Low rotational speeds naturally limit the effectiveness of shaft-driven cooling fans. The market is shifting rapidly towards forced independent fan ventilation, liquid jacket cooling, and smart thermodynamic outer housing frames designed via multi-physics CAD software. This guarantees that heat rise in critical coils remains within Class F or H boundaries.
Unifying global industry leaders under one comprehensive engineering umbrella.
We configure explosion-proof profiles designed for the world's most hazardous atmospheres. Our flameproof (Ex d, Ex de, Ex e) motor portfolios pass testing criteria across ATEX, IECEx, and CU-TR systems, safeguarding petrochemical facilities, drilling rigs, and heavy-gas chemical infrastructure.
With global sustainability standards tightening, Shaanxi Nanfang Motor distributes premium permanent magnet synchronous variants as well as IE3/IE4/IE5 asynchronous solutions. Reducing power grids' active draw lowers overall system emissions and cuts operational utility expenses.
From underground coal conveyors to maritime dynamic positioning pumps and cement mill drive lines, we customize electric frames (low/medium/high voltage) to matching requirements, providing a versatile range of choices for system integrators.
Through strategic acquisitions, Wolong has gained access to outstanding technical archives. The historic purchase of the Austrian ATB Group in 2011 brought the specialized underground mining brand Morley and Navy-tier contractor Laurence Scott under the Wolong banner. This combined group has secured the Queen’s Award for three consecutive years due to its brushless excitation and low starting current designs.
Furthermore, the addition of Brook Crompton Motors brings over a century of energy-efficient "W" and "10" series designs. Schorch Electric Motor, established in 1882, reinforces the group’s heavy-duty high-voltage drive portfolio. Additionally, OLI leads global markets in vibration technologies (MVE and Ex vibration sensors), while the integration of Nanyang Explosion-Proof Group (CNE) in 2015 established China's largest specialized R&D base. Combined with the 2018 integration of General Electric (GE) Industrial Motors, Wolong delivers unparalleled industrial support.
Strategic mergers and technological alignments that formed our global motor network.
With a 130-year legacy, Morley is synonymous with underground coal mine drive reliability and high-spec flameproof protection.
Pioneered auxiliary motors for nuclear facilities and specialized low-starting-current generators for naval applications.
A pioneer in premium efficiency (IE3, IE4, IE5) low and medium voltage AC motors optimized for harsh industrial environments.
Since 1882, setting standards for high-capacity drives in petrochemical pipelines, test stations, and marine operations.
Our worldwide facilities leverage computerized CNC machining centers and advanced balancing platforms to construct high-precision motor frames. Wolong works closely with the OLI vibration motor brand and General Electric's large industrial divisions to verify that all rotors achieve tight balance ratings, minimizing mechanical noise and shaft fatigue under continuous heavy loads.
Traditional induction motors operating at 1500 or 3000 RPM require massive multi-stage speed reducers to drive a conveyor at 30 RPM. This layout creates several engineering challenges:
Take a closer look at the advanced mechanical parts that power our low speed electric motor lines.
Features a robust squirrel-cage configuration utilizing advanced cast aluminum or copper-bar designs. Formed through centrifugal casting or high-pressure die casting, the rotor bars and end rings form a highly reliable structure. This design provides excellent starting torque, high mechanical stability under impact loads, and long-term protection against deformation.
Constructed with high-grade polyester film reinforced with premium glass-cloth and high-mica tapes. Following the VPI (Vacuum Pressure Impregnation) process, the coils are thoroughly sealed against ambient moisture. This advanced insulation system delivers outstanding dielectric strength, excellent thermal transfer, and long-term resistance to harsh chemicals.
Developed using multi-physics structural and fluid dynamic simulations. Manufactured from high-strength cast iron or structural steel, our heavy-duty motor frames deliver substantial mechanical strength. This design provides excellent heat dissipation, minimizes structural resonances, and handles severe torque reactions.
A integrated assembly featuring an optimized air guide cylinder, protective windows, and internal silencer plates. The side-entry air intake profile reduces drag, limits turbulence, and absorbs high-frequency noise. Rated at IP22, this assembly prevents accidental contact with the rotating fan while ensuring steady airflow over the cooling ribs.
When designing low-speed, high-torque systems, mechanical stresses concentrate differently compared to high-speed motors. The motor shafts must handle heavy torsional loads, while the bearings run under high radial forces.
To address these structural demands, Wolong uses advanced digital twins and finite element analysis (FEA) software. This technology maps magnetic fluxes, mechanical resonances, and heat distribution across the entire frame. By optimizing the stator slots and rotor bars, we reduce harmonic torque ripples, ensuring smooth rotation down to low fractional speeds. This structural optimization extends bearing service life and protects connected equipment from excessive vibration.
"By integrating multi-physics CAD design platforms with vacuum pressure impregnation (VPI) insulation, we achieve high mechanical margins. This makes our direct-drive electric systems reliable for critical industrial drives."
Securing critical international certifications to simplify engineering integration and ensure site safety.
Operating in hazardous environments requires compliance with international explosion-proof standards. Shaanxi Nanfang Motor distributes motors certified across different jurisdictions, helping OEMs navigate complex technical barriers and streamline project authorization.
Wolong was among the first Chinese motor manufacturers to achieve ISO 9001 certification. For North American markets, we offer low-voltage systems certified to UL and CSA standards. These motors undergo extensive testing, including insulation resistance checks, locked-rotor torque evaluations, and sound level validation.
For European projects, Wolong provides full ATEX and IECEx certification. This makes our motors ready for installation in Zone 1 and Zone 2 gas atmospheres, as well as Zone 21 and Zone 22 dust hazards. Additionally, certification under TESTSAFE opens access to Australian coal mine projects, while SABS certification supports operations in South Africa.
Nemko/ATEX
CSA
CE
CCC
SABS
TESTSAFE
Streamlined sourcing, custom engineering support, and reliable logistics for complex OEM projects.
Global engineering procurement teams evaluate suppliers based on total cost of ownership (TCO) and supply chain reliability. Shaanxi Nanfang Motor supports these requirements with:
From project kick-off to final commissioning, our field engineers assist your team with technical evaluations and installation setup.
We verify electrical limits, review thermal margins, and configure parameter settings for variable speed drives. This hands-on engineering assistance reduces start-up risks and ensures the motor drive system operates reliably within its designed parameters.
Integrating smart sensors and industrial IoT solutions to protect high-torque equipment.
To prevent unexpected downtime, we are expanding our predictive maintenance technologies. Modern low speed electric motors can be configured with integrated thermal RTDs, vibration sensors, and insulation monitoring probes.
These integrated sensors track operational changes in real time. Software models analyze vibration spectrums and thermal gradients to identify potential issues, such as bearing wear or winding degradation, before they lead to failure. This predictive approach helps operators schedule maintenance efficiently and protects heavy industrial assets.
Moving forward, we are focusing on improving torque density through new stator design geometries and optimized permanent magnet layouts. Our goal is to reduce frame sizes and overall weight while maintaining output ratings, simplifying direct-drive integration on compact machines.
A look inside our certified manufacturing halls and specialized testing bays.
Technical insights to help engineers and procurement teams select the right motor solutions.
Review our specialized high-voltage, explosion-proof, and high-performance AC motors for global industrial installations.
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