Explore our leading catalog of certified high-voltage, low-voltage, and flameproof motor solutions designed for absolute performance in hazardous and heavy industrial areas.
In the contemporary industrial landscape, the quest for energy conservation, system reliability, and localized engineering compliance has forced a paradigm shift. The selection of heavy-duty electrical rotating machines—whether configuring a 3 Phase Synchronous Generator or deploying advanced explosion-proof induction motors—demands a comprehensive evaluation of design standards, material metallurgy, and global supply chain integrity.
As authorized representatives of Wolong Group, Shaanxi Nanfang Motor Technology Co., Ltd. bridges the gap between state-of-the-art Chinese manufacturing efficiencies and international regulatory compliance (such as ATEX, IECEx, and NEMA). Our technology matrices are engineered to withstand the harshest environments: from deep coal extraction shafts and maritime vessels to high-pressure petrochemical installations.
Shaanxi Nanfang Motor Technology Co., Ltd. is the authorized global distributor of Wolong Electric Drive Group Co., Ltd. Wolong was founded in 1984 and successfully listed on the Shanghai Stock Exchange in 2002 (code SH600580). Over the course of nearly four decades of aggressive engineering expansion, Wolong has established 3 core manufacturing bases, 39 advanced factories, and 3 global R&D centers.
Wolong’s growth model is anchored in the acquisition of historic global brands that represent the absolute pinnacle of Western electrical engineering. By combining European technology heritages with China's unparalleled industrial supply chain scale, we deliver premium performance without the premium lead times.
Our competitive advantage lies in the systematic consolidation of the world's most reputable motor and generator brands. Each brand brings a specific operational expertise that benefits our entire product ecosystem:
Acquired in 2011 (97.94% shareholding control), ATB Group is one of the three major European motor manufacturers. The group incorporates historic sub-brands like Morley (highly esteemed in global underground coal extraction with a 130-year lineage) and Laurence Scott (renowned for low starting current designs utilized in British nuclear installations and naval vessel generator units).
Brook Crompton brought over a century of low, medium, and high-voltage AC motor design experience to the group, pioneering the energy-efficient "W" and "10" frame series. Similarly, Schorch (established in Germany in 1882) joined Wolong in 2011, establishing the gold standard in heavy drive solutions for oil and gas, tunnels, and water management installations globally.
In 2015, CNE (China's largest explosion-proof research and development base) integrated into Wolong, enhancing domestic capability in high-voltage ex-proof fields. In 2018, General Electric (GE) Industrial Motors joined the alliance, bringing elite tooling methodologies and heavy-duty designs for petrochemicals, mining, and metallurgy systems.
Global Historic Operations & Manufacturing Facilities Archive
A closer look at the key component structures engineered by Wolong. Every subsystem is designed using advanced multi-physics computational fluid dynamics (CFD) and structural simulations to ensure maximum operational uptime.
Our machine rotors utilize a highly refined squirrel cage design. Depending on operating capacity and torque dynamics, we offer either centrifugal cast aluminum rotors or high-durability copper bar rotors.
Cast aluminum models benefit from uniform slot filling via precise die-casting, which yields a rugged monolithic structure and stellar transient start-up characteristics. For demanding high-power applications, copper bars are mechanically secured and welded to the end rings using state-of-the-art procedures to counter intense mechanical shear and thermal load stresses during startup sequences.
The stator coil is insulated with high-grade mica tapes (available in low-powder/high-mica or medium-powder types) and reinforced with glass cloth and polyester film. The entire assembly undergoes a highly controlled Vacuum Pressure Impregnation (VPI) process.
This transforms the coil into a hermetically sealed, rigid unit. The insulation system is rated to class F/H standards, ensuring resistance to humidity, chemicals, and mechanical strain, while delivering a low thermal degradation rate.
Designed using multi-physics structural and fluid simulation programs, our high-strength cast iron and steel frames feature substantial mechanical redundancy. By analyzing structural resonances and cooling characteristics beforehand, we optimize the housing structure to reduce vibration levels and eliminate localized thermal hotspots.
The cast-iron housing resists high external shock loads, providing a reliable operational life in critical infrastructures like pipeline transport stations and mining conveyors.
A major design breakthrough is our integrated acoustic control fan system. Consisting of a compact fan cover, air guide cylinder, protection window, and soundproofing plates, this design reduces operational noise while optimizing the airflow path.
Its side-inlet configuration reduces windage losses caused by airflow obstructions behind the motor. The system features an IP22 rating and uses high-density acoustic absorption panels to capture high-frequency fan noise without reducing cooling performance.
Building high-capacity electrical equipment requires more than just engineering blueprints; it relies on a secure supply chain. Wolong's Chinese facilities utilize advanced vertical integration models to optimize production lead times and lower material acquisition costs.
From the procurement of grain-oriented electrical steel sheets and high-purity copper conductors to domestic casting foundries and automated stator winding lines, our manufacturing chain maintains strict quality controls at every step. This close integration protects our production schedules from global supply disruptions, enabling us to deliver customized configurations faster than Western competitors.
Automated Stator Assembly
High Precision Machining
Precision Coiling
Testing Laboratories
Our electrical drive solutions are tailored for demanding conditions across various industrial sectors:
In explosive gas atmospheres (Zone 1/2), motors like the WEBP3 and YBXKK series power refinery pumps, high-pressure gas compressors, and product pipelines safely, preventing spark propagation.
Heavy-duty conveyors and tunneling boring systems require high torque and dust-ignition protection. The Morley-inspired YBS and YBU series provide flameproof safety for underground coal operations.
Our synchronous generator systems supply reliable utility power, while wound rotor induction motors (YR series) deliver high starting torque for heavy steel mills, water treatment pumps, and tunnel ventilators.
As the industrial sector transitions toward carbon neutrality, the design of synchronous and asynchronous machines is evolving rapidly. Our R&D centers in China, Europe, and Japan are driving this transformation through three key development tracks:
We are shifting from induction profiles to permanent-magnet assisted synchronous machines (PMSM) to minimize rotor copper losses and maximize efficiency, even under partial loads.
By integrating smart temperature, vibration, and insulation leakage sensors directly into the stator coils and bearing housings, we enable real-time anomaly detection before failure occurs.
We are replacing traditional varnishes with VOC-free insulation resins and using high-grade recycled steel laminations to reduce the carbon footprint of our manufacturing process.
Exporting heavy machinery into international markets requires strict compliance with localized safety and electrical codes. Wolong has secured certifications from leading regulatory bodies worldwide:
The primary difference lies in rotor speed relative to the magnetic field. Synchronous motors run at synchronous speed (the rotor locks with the stator's rotating magnetic field), while asynchronous induction motors run at a speed slightly slower than the stator field (slip speed). Synchronous models are often used for precise speed control and power factor correction, while asynchronous motors are widely selected for their rugged construction and simpler maintenance requirements.
We use premium Class F and Class H insulation materials, processed via Vacuum Pressure Impregnation (VPI). The coils are wrapped with high-quality mica tape and reinforced with glass cloth, providing excellent thermal stability, moisture resistance, and mechanical strength under high electrical stresses.
Our motors are designed to meet ATEX, IECEx, and China Ex certification standards. Flameproof series (such as the YB3, YBBP, and YBXKK) feature heavy-duty cast-iron enclosures designed to contain internal explosions without igniting surrounding flammable gases or dust mixtures.
Yes. As a major supplier, Shaanxi Nanfang and Wolong provide complete engineering customization, including custom shaft extensions, specific foot configurations, customized terminal box locations, and compatibility with variable frequency speed regulation systems (like the WEBP3 and BPY series).
Lead times vary depending on the required certifications, customization depth, and machine frame size. Thanks to our integrated Chinese supply chain and component manufacturing facilities, our production times are typically 15-30% shorter than the industry average. Standard catalog models can often ship directly from stock.
Browse the remainder of our specialized series, including wound rotor induction motors, tunnel boring machinery drives, variable frequency systems, and brushless synchronous models.
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