Explore our premier, high-efficiency IEC-standard asynchronous and synchronous motor solutions certified for international engineering environments.
Shaanxi Nanfang Motor Technology Co., Ltd. stands as the authoritative global distributor of Wolong Electric Drive Group Co., Ltd. (founded in 1984, listed in 2002 under stock code SH600580). With over three decades of dynamic industrial expansion, Wolong has solidified its market authority by executing high-profile acquisitions and developing massive, state-of-the-art manufacturing infrastructures globally.
Today, Wolong operates a vast matrix of 3 main manufacturing bases, 39 advanced factories, and 4 dedicated R&D centers spanning China, Europe, and the Americas. The group is consistently recognized for driving technology integration, production processes, and high-efficiency motor control solutions that power the world's most demanding environments.
Our collaborative mission focuses on delivering highly integrated drive technologies, reducing the carbon footprint of major processing plants, and providing verified industrial motors conforming directly to IEC, NEMA, and relevant international regulatory directives.
Engineering customizable, high-end motor drive system architectures engineered to meet strict hazardous-area directives.
Complete compliance for hazardous zones. Offering certified safety classifications including flameproof (Ex d), increased safety (Ex e), dust-ignition proof, and positive-pressure type (Ex p) shell configurations.
Unmatched thermal efficiency utilizing premium electromagnetic steel sheets, state-of-the-art winding profiles, and optional Permanent Magnet (PM) synchronous motor options to minimize TCO.
From low voltage asynchronous units to massive high-voltage wound rotor induction motors (with frame sizes up to 630mm), providing optimal system integration for diverse, extreme engineering systems.
Why global EPC procurement managers select our Chinese factories for high-performance IEC motor supply chains.
Purchasing high-specification electric motors from our Chinese manufacturing lines offers a unique blend of structural cost-efficiency, deep supply chain integration, and rapid production turnaround. The Wolong-Nanyang CNE manufacturing facility is China's largest specialized explosion-proof scientific research and production hub. This density allows our factories to command structural economies of scale that are directly reflected in competitive pricing for high-efficiency IE4 and IE5 low voltage motors.
Furthermore, our operations integrate specialized metallurgical control, fully automated copper winding mechanisms, and large-scale Vacuum Pressure Impregnation (VPI) autoclaves. By housing these production phases within unified manufacturing zones, our quality managers enforce strict oversight on structural dimensions, stator insulation consistency, and rotor dynamic balancing. This structural integrity directly translates to longer machinery life spans and lower mechanical failures on active production sites.
Building a worldwide motor empire by merging historic European and North American heritage brands with modern manufacturing efficiency.
In 2011, Wolong strategically acquired 97.94% of the Austrian ATB Group, a premier European electric motor manufacturer. This integration absorbed iconic heavy industrial brands like Morley (boasting nearly 130 years of underground mining excellence) and Laurence Scott (renowned for custom low starting current motor configurations used extensively in British nuclear power stations and naval vessels). This acquisition dramatically elevated our high-voltage electrical engineering capabilities.
Additionally, Brook Crompton Motors and Schorch Electric Motor (established in 1882) joined the Wolong Group. Brook Crompton is highly regarded for its premium "W" and "10" series low/medium voltage energy-efficient motors. Schorch remains the standard for heavy-duty drive systems across global petrochemical and water management projects. These mergers combined European engineering craftsmanship with our highly automated mass-production facilities.
Dating back to 1882 and expanding through key joint ventures, Wolong joined forces with OLI Vibration Motor in China, securing a massive share of the international vibration motor market. In 2015, China's largest explosion-proof motor base, CNE (Nanyang Explosion-proof Group Co., Ltd.), officially joined the Wolong Group, consolidating specialized technologies in positive-pressure shells, dust-proof enclosures, and high-voltage oil and gas pipeline pump systems.
In 2018, the commercial and industrial division of General Electric (GE) Motors officially partnered with Wolong. As one of the oldest commercial and industrial equipment manufacturers worldwide, GE brought extensive metallurgical, paper milling, chemical drive, and water filtration motor design knowledge, allowing us to produce custom NEMA and IEC motors for heavy industries across the Americas and globally.
Quality Check
Machining Process
Testing Rig
Stator Windings
Export Logistics
Drive Systems
Every element of our hot-selling IEC motors is designed via digital twin simulations to perform under mechanical stress and extreme thermal loads.
Our rotors feature an optimized squirrel-cage configuration. Cast aluminum rotors are produced using centrifugal casting or advanced high-pressure die-casting techniques. This merges the conductor bars and end-rings into a single, high-durability structure, eliminating electrical resistance hotspots. For heavy-duty motors with larger ratings, copper bar rotors are utilized, using high-reliability end-ring silver brazing procedures. High-speed models are fitted with high-strength carbon fiber or alloy protective retaining rings to prevent centrifugal deformation during continuous operations.
Stator coils are wrapped using premium polyester films reinforced with glass cloth and high-density, low-powder mica tapes. Following assembly, the wound stator core undergoes an automated VPI (Vacuum Pressure Impregnation) cycle. VPI expels all micro-voids, replacing air pockets with solventless polymerizing resins. This produces a hermetically sealed coil structure that provides superior moisture resistance, high mechanical shear strength, and thermal resilience under extreme peak-load demands.
The motor enclosure/frame is designed using structural and fluid-dynamics simulation platforms (FEA and CFD). Cast from high-grade cast iron or structural steel plates, the frames feature robust cooling ribs. This layout provides exceptional structural stiffness, keeping shaft vibration within levels defined by ISO 10816. The frames are engineered to handle structural torque spikes, lower resonant frequencies, and enhance thermal dissipation to extend bearing lifespans.
The aerodynamic low-noise cooling assembly consists of a non-sparking static fan cover, specialized air guide cylinders, safety mesh windows, and integrated silencer baffles. A side-entry air inlet pathway minimizes flow restriction behind the motor, reducing turbulence and acoustic energy losses. Rated at IP22 to IP55, it prevents contact with moving blades while ensuring optimized, uniform airflow along the cooling ribs.
Rotor Shaft Processing
Rotor Dynamic Balancing
Stator Coil Insertion
High-Voltage VPI System
Our manufacturing plants operate under rigid quality management structures, holding international certifications to facilitate seamless project clearance.
Nemko / ATEX
CSA
CE
CCC
SABS
TESTSAFE
ISO 9001:2015 Standards: Serves as our primary quality management framework. Testing regimens cover core structural alignments, dimensional verification, and electrical safety validation.
NEMA Standard (North America): To verify compliance with NEMA mechanical and electrical specifications, our low and medium voltage motors are tested for locked-rotor current, load efficiency, temperature rise, and breakdown torque. These units carry formal UL and CSA marks.
IECEx & ATEX Standards: Mandatory safety certifications for high and low voltage equipment in gas, mist, or dust hazardous zones across the EU, Middle East, and Asia. Our explosion-proof motors are designed to operate safely under intense ambient heat.
TESTSAFE (Australia/Southern Hemisphere): As Australia's premier certification framework for subterranean coal mining equipment, acquiring the TestSafe mark enables our flameproof motors (e.g., the YBSD conveyor motor series) to integrate seamlessly into mining infrastructure across Australia and nearby regions.
Powering essential infrastructure across high-reliability industries with customized drive solutions.
Handling hazardous gases and dust requires highly secure equipment. Our YBX4 and YFB3 explosion-proof induction motors provide reliable operation for centrifugal gas pumps, hydrocarbon mixers, and cooling towers.
For conveyor lines, crushing units, and ventilation fans. Built to withstand coal dust and mechanical impacts, our heavy-duty flameproof wound-rotor YBSD motors keep mining operations running safely.
Providing distributed synchronous condenser system solutions to stabilize local grid frequencies. These systems support grids handling variable renewable energy sources by managing reactive power dynamics.
Answers to critical questions regarding IEC standards, engineering options, and compliance requirements.
Explore our specialized high-voltage machinery, distributed condensers, and synchronous motor models.
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