Engineered for high efficiency, high voltage industrial applications, and explosive gas/dust environments.
Connecting Shaanxi Nanfang Motor and the world-leading manufacturing capacity of Wolong Electric Drive Group.
Shaanxi Nanfang Motor Technology Co., Ltd. is the official authorized distributor of Wolong. Wolong Electric Drive Group Co., Ltd., founded in 1984 and listed on the Shanghai Stock Exchange in 2002 (Ticker: SH600580), stands at the absolute forefront of the global electric motor industry. Over three decades of technology aggregation and manufacturing excellence has propelled Wolong to manage 3 manufacturing bases, 39 modern factories, and 3 global R&D centers worldwide.
Dedicated to a global brand strategy, Wolong combines cutting-edge R&D with strict process manufacturing and sales networks. This ensures that every frequency changeable motor, explosion-proof synchronous unit, and variable speed drive delivered meets the highest demands of efficiency, mechanical durability, and strict local compliance.
Our global operational footprint ensures that we supply cutting-edge variable speed technology to large EPC contractors, petrochemical companies, and heavy manufacturing units worldwide.
Through strategic acquisitions, Wolong has unified centuries of European and American manufacturing mastery into a single, cohesive drive solution platform.
Wolong has established motor and drive control R&D centers in China, Europe, and Japan, alongside a central research institute in Shanghai. This commits us to the absolute forefront of drive mechanics, achieving leading global standards in wide-speed-range efficiency.
Owning international historical giants like Brook Crompton, Morley, Laurence Scott, Schorch, ATB, and Nanyang Explosion, Wolong offers extreme reliability in chemical, mineral extraction, and utility projects worldwide.
With massive advantages in structural redundancy and thermal dissipation, our explosion-proof models pass the most rigorous tests for ATEX, IECEx, CU-TR (EAC), and Chinese national coal safety certifications.
In 2011, Wolong acquired 97.94% of the Austrian ATB Group, one of Europe's top three motor manufacturers. This brought the legendary Morley mining motor brand under our group umbrella. With over 130 years of history in underground coal mining, Morley is synonymously linked with high-voltage reliability in dust-heavy, flame-prone environments.
Laurence Scott is the engineering pioneer that supplied critical low-starting-current motors for British nuclear power plants and navy vessels. Following the acquisition by Wolong, their heavy-duty synchronous condenser systems and high-capacity marine generators have continued to secure global prestige.
Renowned for high-efficiency design, Brook Crompton has guided motor technology advancements for decades. Their premium "W" and "10" series low-voltage and medium-voltage motors deliver outstanding variable speed performance and reduced energy consumption profiles across diverse industrial sectors.
Schorch (acquired 2011) sets the high-output drive standard for petrochemical oil and gas pipelines. Nanyang Explosion Group (CNE) joined in 2015, operating as China's largest explosion-proof motor research base. In 2018, the commercial and industrial motor division of General Electric (GE) integrated into Wolong, consolidating a powerful market position in heavy metal processing, materials treatment, and power plant infrastructure.
How our component architecture tackles shaft voltage, thermal surges, and noise margins under variable frequency operations.
Our rotors feature advanced squirrel cage designs, using centrifugal aluminum casting or die-casting techniques. Pure molten aluminum is forced into the core slots to integrate rotor bars and end rings into a robust, single-piece structure. For larger capacity systems, copper-bar rotors with precision end-ring welding are employed. High-speed models are fitted with protective shaft retention rings to maintain structural integrity under high mechanical stress.
Stator coils are wrapped with high-grade polyester film reinforced with glass cloth and high-mica tapes. Following the VPI (Vacuum Pressure Impregnation) process, the resin fills all micro-voids, producing a pristine, moisture-resistant insulation barrier. This ensures high dielectric strength, prevents corona discharges under high dv/dt VFD switching, and improves thermal dissipation.
Designed via a digital platform simulating structural and fluid multi-physics fields, our high-strength cast iron (or structural steel) frames provide deep mechanical redundancy. This structural stability isolates the natural frequency of the motor, preventing resonance under varying frequency outputs, and dampens mechanical shock.
Comprising an integrated fan cover body, air guide cylinder, protective window, and silencing plates, this system minimizes aerodynamic resistance. By drawing air through side inlets, it reduces obstacles at the rear and dampens noise caused by turbulence. Rated at IP22, it prevents accidental contact while ensuring optimal heat dissipation.
An executive breakdown of the technologies shaping the next generation of energy-efficient, variable speed drive systems.
Global energy efficiency mandates are driving the transition from IE3 and IE4 induction motors to IE5 Ultra-Premium efficiency levels. For frequency-changeable systems, this is achieved by shifting toward permanent magnet synchronous motors (PMSM) and synchronous reluctance (SynRM) technologies. By eliminating rotor copper losses, these motors maintain high efficiency even when operating at partial loads and lower speeds, helping industrial plants reduce their carbon footprint.
The development of Silicon Carbide (SiC) and Gallium Nitride (GaN) variable frequency drives is transforming motor insulation requirements. While these wide-bandgap semiconductors allow for higher switching frequencies and smaller drive footprints, they also produce high-voltage rise rates (dv/dt) that stress stator insulation. The next-generation roadmap focuses on developing advanced corona-resistant wire enamels and modified stator slot geometries to prevent partial discharges under rapid voltage shifts.
Future industrial motors will function as intelligent sensors within the Industrial Internet of Things (IIoT). By integrating temperature, vibration, and magnetic flux sensors directly into the stator core and bearing housings, modern drives can run real-time diagnostic algorithms. This allows operators to detect insulation degradation, bearing wear, and shaft alignment issues early, preventing costly unscheduled downtime.
Deploying tailored drive systems to solve critical torque, thermal, and safety challenges across major industrial sectors.
Underground mines demand high starting torque, robust dust containment, and explosion safety. Utilizing our dedicated Morley and Nanyang CNE flameproof VSD motors (such as the YBSD and TBVF series), we supply conveyor belt systems and extraction machinery with durable mechanical builds that withstand heavy dust, moisture, and continuous vibration.
In oil and gas operations, explosive vapors require strict compliance with Ex d, Ex e, and Ex nA protection standards. Our high-voltage variable frequency motors (including the WEBP3 and YBX3 series) prevent spark propagation, control heat rise, and run continuously on remote gas pipelines and petrochemical processing pumps.
Marine applications require protection against salt spray corrosion and structural dampness. Offering DNV-type approved marine electric motors (like the YQ series), Shaanxi Nanfang Motor delivers reliable drive systems for vessel winches, ballast pumps, and auxiliary propulsion units, operating under tight space and high humidity conditions.
Leveraging Wolong's advanced manufacturing infrastructure to ensure reliable product delivery, quality control, and cost stability.
Wolong's production facilities utilize advanced manufacturing technology, featuring automated stator winding lines, robotic welding stations, and automated coordinate measuring machines (CMM). By minimizing manual handling of critical internal structures like stator slots and rotor alignments, the plant achieves high mechanical consistency, reducing human error and accelerating production times.
A major advantage of our supply chain is the vertical integration of core manufacturing steps. From raw steel lamination cutting and core punching to VPI varnishing, frame casting, and final dynamometer load testing, everything is managed within our facilities. This independence from external sub-contractors insulates the production schedule from global raw material delays and helps maintain stable pricing.
With 39 factories located in major industrial zones across China, Vietnam, Austria, Germany, the UK, and Mexico, the group can route production dynamically. In the event of localized supply disruptions, customs delays, or shipping bottlenecks, order execution can shift to alternate hubs, ensuring global project timelines are met.
Critical factors for EPC procurement managers, utility buyers, and engineering offices when selecting variable speed drive solutions.
The purchase price of an industrial motor typically accounts for less than 5% of its lifetime operational costs, while electricity consumption makes up over 90%. Implementing a permanent magnet variable frequency system can reduce energy usage by 15% to 40% depending on the load profile. When evaluating suppliers, buyers should calculate the return on investment (ROI) using the following criteria:
Wolong motors undergo rigorous testing to comply with major international certifications, ensuring entry into global markets.
Nemko / ATEX
CSA Standard
CE Directives
CC China Quality
SABS Standard
TESTSAFE
To simplify compliance, Wolong maintains certifications across all major regulatory bodies. Under ISO 9001 standards, we ensure complete traceability of rotor casting alloys and copper winding batches. For markets in North America, we perform efficiency and insulation testing to meet NEMA, UL, and CSA standards. In Europe, our explosion-proof models comply with IECEx and ATEX standards. For mining and heavy equipment entering Australia, our TestSafe compliance enables seamless deployment in demanding underground applications.
Answers to common technical queries regarding installation, insulation protection, and selecting suppliers for variable speed drive (VSD) systems.
Key factors include the speed range, load type (constant vs. variable torque), voltage rises (dv/dt) from the VFD, and the operating environment. Ensure the motor has adequate winding insulation (preferably VPI-processed Class F or H) and bearing protection (such as insulated non-drive end bearings or shaft grounding) to prevent electrical damage.
The Vacuum Pressure Impregnation (VPI) process removes air and moisture from the stator slots, replacing them with a solid resin barrier. This improves heat dissipation, prevents movement in the windings, and eliminates partial discharges caused by high-voltage transients from fast-switching VFDs.
PMSMs feature magnets embedded in the rotor, eliminating rotor current and copper losses. This allows them to achieve IE5 efficiency, maintaining high performance even at low speeds and partial loads where induction motors typically experience reduced efficiency.
Our motors are designed with flameproof enclosures (Ex d), increased safety features (Ex e), or non-sparking configurations (Ex nA). These designs prevent internal electrical arcs or hot spots from igniting external hazardous gases or dust, and every model is certified by notified bodies like Nemko, PTB, or CNE.
To prevent electrical EDM (Electrical Discharge Machining) current path issues through the bearings, we offer hybrid ceramic bearings, insulated end-shield designs, and grounding brushes. These solutions safely route currents to the frame, preventing bearing pitting and fluting.
Browse our certified industrial product range, designed for tunnel boring, marine deployment, and hazardous processing plants.
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