Engineered to survive extreme industrial workloads, hazardous gases, and harsh environments.
Shaanxi Nanfang Motor Technology Co., Ltd serves as the premier authorized global distributor of Wolong. Wolong Electric Drive Group Co., Ltd. was established in 1984 and listed on the Shanghai Stock Exchange in 2002 (code SH600580). Over the past three decades, Wolong has evolved into an international powerhouse in motion control, housing 3 major corporate manufacturing bases, 39 advanced factories, and 4 state-of-the-art Research & Development hubs globally.
Focusing strictly on high-performance motor design, control systems, and automated drives, Wolong has driven a multi-brand global strategy. Through organic expansion and key acquisitions, we have secured a leading technological and commercial position within international industrial markets, engineering motor drives that power key industrial complexes.
Learn More About Shaanxi NanfangEnsuring compliance, efficiency, and reliability for critical global processes.
Designed for explosion hazard zones. We offer multi-regional certificates (including UL, CSA, Nemko, and SABS) to meet compliance requirements in oil, chemical, and gas processing operations globally.
Providing motors in IE3, IE4, and ultra-high IE5 efficiency classes. Our advanced permanent magnet drive technologies yield operational cost reductions and reduce footprint requirements.
From low-voltage auxiliary motors to specialized multi-megawatt high-voltage synchronous generators, our comprehensive catalog accommodates diverse installation configurations and custom load profiles.
Strategic mergers combined with research and development centers in China, Europe, and Japan.
Wolong has established research centers in China, Europe, and Japan, complemented by the Central Research Institute in Shanghai. This framework integrates technical expertise across structural, electromagnetic, and thermodynamic disciplines to develop and manufacture industry-compliant products.
Our motors are designed for high reliability and durability in hazardous locations (petroleum, petrochemical, and mining sectors). We maintain global explosion-proof compliance with certifications including ATEX, IECEx, and EAC (CU-TR).
Wolong holds domestic brands such as Nanyang Explosion-proof along with century-old international names: Brook Crompton, Morley, Laurence Scott, Schorch, and ATB. In 2011, Wolong acquired 97.94% of the Austrian ATB Group. This acquisition integrated Morley's mining motor technology (a 130-year standard for reliability in underground coal mining) and Laurence Scott's low starting current capabilities (which support operations in British nuclear power stations and naval vessels).
As a notable name in electrical machinery, Brook Crompton provides over 100 years of experience in motor design. Under the Wolong group, Brook Crompton continues to manufacture energy-efficient low, medium, and high voltage AC motors (including the premium 'W' and '10' series) for harsh, corrosive, and chemical process environments.
Schorch (founded 1882) joined Wolong in 2011, supporting global projects in oil, water management, and tunnel infrastructure. OLI Brand represents our specialized vibration motor sector. In 2015, China's largest explosion-proof base, Nanyang Explosion Protection Group (CNE), integrated with Wolong. In 2018, General Electric (GE) entered a strategic partnership with Wolong, licensing GE commercial & industrial motor technology to enhance high-voltage and nuclear power generation applications.
Tracking the structural evolution and global reach of Wolong's international drive network.
Accumulated with abundant assets and professional experience in manufacturing, WOLONG started to expand its global reach. To establish itself as a leading manufacturer of AC motors & drives worldwide, WOLONG worked to acquire established international groups.
Following the 2011 acquisitions, WOLONG integrated advanced technical and technological support. By acquiring the Austrian ATB Group, WOLONG expanded its presence in the global motor market. This integration joined Morley's underground coal mining systems and Laurence Scott's custom low starting current generator technologies to WOLONG's portfolio, resulting in three consecutive Queen's Awards for technical design.
The addition of Schorch in 2011 and strategic cooperation with OLI vibration motors starting in 1999 further diversified our product range. In 2015, the Nanyang Explosion-proof Group (CNE) joined the cooperative network, strengthening our capabilities in flameproof and safety-increased motors. The 2018 partnership with GE Industrial Motors enhanced support for heavy industries including petrochemical processing, material handling, water treatment, and metallurgy.
Meeting global standard certifications to facilitate cross-border trade and compliance.
Ensuring flameproof conformity for EU Zone 1 and Zone 2 environments.
Designed for compliance in North American industrial hazardous configurations.
Conformity verification for machinery, safety, and electromagnetic compatibility across the EU.
Meeting Chinese national safety standards for low and high voltage electrical machinery.
Meeting regulatory standards for safety and efficiency in Southern African industrial sectors.
Facilitating the export of specialized mining motors to Australian heavy coal operations.
WOLONG has secured major product certifications, facilitating integration into international markets.
Explaining the mechanical and electrical features of our motor frames, stators, and rotor systems.
Our rotors feature a squirrel cage design. Cast aluminum rotors are produced using centrifugal casting or high-pressure die-casting, integrating the rotor bars and end rings into a single structural unit. This process supports reliable starting torque and mechanical integrity under load changes.
For high-capacity high-voltage motors, we use copper bar rotors with TIG welding for the end rings. High-speed models feature alloy retaining rings to manage centrifugal stress during variable frequency operations.
The coils are constructed using polyester-film-reinforced mica tape. Through a Vacuum Pressure Impregnation (VPI) system, the winding assembly is impregnated with solventless resin to create a uniform, moisture-resistant barrier.
This design supports dielectric strength, thermal dissipation (Class F insulation rated with Class B temperature rise limit), and mechanical resilience against electromagnetic forces during starting cycles.
The motor frame is designed using multi-physics structural and fluid thermal simulations. Made of high-tensile cast iron or welded steel plate, it provides mechanical rigidity, vibration damping, and thermal dissipation surface area to maintain alignment under load stresses.
The fan cover system includes an aerodynamic housing, air guide baffle, intake screen, and silencer plates. Side-entry intakes optimize airflow paths to help reduce losses and turbulence noise.
Incorporated sound-dampening insulation helps reduce high-frequency acoustic emission. The IP22-rated guard protects the internal fan blades from external contact.
An analysis of manufacturing supply chains, procurement considerations, and the shift toward higher efficiency systems.
WOLONG's industrial footprint in China leverages local material ecosystems and advanced manufacturing hubs. Access to local silicon steel processing, copper drawing, cast-iron casting, and automated CNC machinery helps optimize production times.
Integrating raw material supply, precision machining, assembly, and full load testing within unified manufacturing zones helps manage lead times and product consistency.
Through Shaanxi Nanfang Motor Technology and Wolong's global office network, we offer regional engineering, commissioning, and validation services. This localized support helps align equipment configurations with regional requirements, including European ATEX directives, North American NEC regulations, and Australian TestSafe mining codes.
Industrial motor procurement focuses increasingly on Total Cost of Ownership (TCO). Since energy consumption represents over 90% of a motor's lifecycle cost, selecting high-efficiency IE4 or IE5 permanent magnet designs can help reduce operating costs.
Additionally, modular maintenance configurations, standardized bearing setups, and diagnostic instrumentation help manage downtime and extend system service life.
The industrial sector is transitioning toward higher efficiency classes and smart diagnostics. The integration of permanent magnet synchronous motors (PMSM) controlled by variable speed drives (VSD) supports high torque efficiency across variable speed ranges.
At the same time, the deployment of wireless vibration and temperature sensors supports predictive maintenance by identifying potential faults, such as bearing wear or winding temperature rises, before failure occurs. Explosion-proof designs are also adapting to new requirements, including hydrogen-enriched process environments requiring specialized Ex d or Ex e protection.
Deploying specialized motor platforms across critical industrial sectors.
Our heavy-duty flameproof asynchronous motors (such as the YBU, YBUS, and YBUD series) are designed to withstand high dust levels, shock loads, and hazardous gas concentrations. These units power tunnel boring cutterheads and underground conveyors, providing reliable starting torque and mechanical durability under fluctuating loads.
For Zone 1 and Zone 2 locations in petrochemical facilities, we provide certified Ex d (explosion-proof) and Ex e (increased safety) high-voltage motors. These systems drive process gas compressors, crude oil transmission pumps, and air-cooled heat exchangers, ensuring continuous operation under severe ambient conditions.
Our high-efficiency WE3 and Y YX series motors drive municipal water distribution pumps, wastewater treatment blowers, and boiler feed pumps. Featuring high structural rigidity and optimized cooling, these motors support stable continuous operation in municipal utility grids.
Technical advice from our engineering team regarding high-voltage motor selection, installation, and operation.
Ex d (Flameproof): The enclosure is designed to contain an internal explosion of gas or vapor without sustaining damage, and to prevent the flame from propagating to the surrounding explosive atmosphere through joint paths.
Ex e (Increased Safety): Focuses on preventing potential spark, arc, or hot spot generation on internal and external components of the motor during normal operation. This is achieved through strict insulation controls, air clearance distances, and temperature limits.
The VPI process places the wound stator in a vacuum chamber to remove air and moisture from the insulation tape. A solventless epoxy resin is then introduced under high pressure to fill all voids within the winding structure.
Once cured, the resin forms a solid composite with the mica tape. This helps improve thermal conductivity, structural strength, moisture resistance, and corona discharge protection in high-voltage designs.
Copper has higher electrical conductivity than aluminum, which reduces rotor I²R resistive losses and improves motor efficiency. For large multi-megawatt systems, copper bar rotors with welded end rings support structural stability under high thermal and mechanical stresses during start-up cycles.
VFD operation can introduce high-frequency voltage harmonics, transient dV/dt stresses, and common-mode shaft voltages. To protect the motor, we utilize reinforced insulation systems, insulated bearings (typically on the non-drive end) to prevent bearing currents, and grounding brushes. Auxiliary cooling fans may also be installed to ensure proper heat dissipation at low operating speeds.
TestSafe certification verifies that mining motors comply with relevant safety and explosion protection standards for underground coal mines. This is a critical requirement for deploying equipment in Australian mining operations and adjacent markets.
Multi-physics simulations analyze electromagnetic, structural vibration, and fluid thermal fields simultaneously. This allows engineers to identify resonant frequencies, optimize cooling fin design, and reinforce structural components, reducing thermal stress and operational vibration levels.
Standard AC induction motors, synchronous machines, and heavy permanent magnet equipment.
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