Discover high-efficiency low-voltage and high-voltage motor configurations compliant with international standards.
Amidst the global acceleration toward green manufacturing and strict enforcement of Minimum Energy Performance Standards (MEPS) by the European Union, United States, China, and other industrial superpowers, the requirement for premium-efficiency motors has shifted from recommendation to mandatory compliance. The IE3 standard (premium efficiency defined by IEC 60034-30-1) represents a milestone in reducing power consumption in industrial processes, which historically account for over 40% of the world's total electricity usage.
Operating as an experienced industrial distributor, Shaanxi Nanfang Motor Technology Co., Ltd. supplies state-of-the-art power transmission technology engineered by the Wolong Group. Wolong’s premium systems satisfy international standards, offering substantial reductions in carbon emissions and a lower Total Cost of Ownership (TCO). By adopting high-quality materials and electromagnetic optimization, these machines achieve energy-saving performance that supports global manufacturing initiatives.
Integrating decades of global manufacturing excellence and industry-leading design capabilities.
Shaanxi Nanfang Motor Technology Co., Ltd. is the authorized distributor of Wolong. Wolong Electric Drive Group Co., Ltd. was founded in 1984 and successfully listed in 2002 (code SH600580). Over more than three decades of strategic expansion, Wolong has established 3 central manufacturing hubs, operates 39 industrial production facilities, and leverages 3 dedicated global R&D centers.
Wolong operates world-renowned design and fabrication systems in China, Vietnam, the United Kingdom, Germany, Austria, Italy, Serbia, Mexico, India, and beyond. This distributed footprint ensures reliable component logistics, robust production lines, and localized engineering support across all industrial markets.
Wolong's portfolio integrates historic premium brands including ATB, Brook Crompton, Schorch, Morley, Laurence Scott, OLI, CNE, and the commercial industrial motor capabilities of General Electric (GE). This collective expertise delivers reliable performance in heavy-industry sectors worldwide.
WOLONG successfully acquired 97.94% of the Austrian ATB Group, one of the three major European motor manufacturers. This integration brought the expertise of the 130-year-old Morley brand (coal mining specialty) and Laurence Scott (low-starting-current naval/nuclear generator technology) into the group's global footprint.
The addition of Brook Crompton brought advanced design techniques for low, medium, and high-voltage AC motors (including the premium 'W' and '10' series) to the group. Simultaneously, Schorch (established 1882) expanded Wolong's presence in high-specification oil, gas, water supply, steel, and shipbuilding industries.
In 2015, CNE (Nanyang Explosion-proof Group)—China's largest explosion-proof motor research and manufacturing base—joined the Wolong Group, securing technical advantages for hazardous environments. In 2018, the commercial and industrial motor division of General Electric (GE) joined the portfolio, providing robust engineering support for heavy industries globally.
An inside look at our materials selection and manufacturing processes.
Our rotors feature a robust squirrel cage design, utilizing high-grade cast aluminum cores produced via centrifugal casting or advanced high-pressure die-casting. The molten pure aluminum is injected into the rotor core slots under strict thermal controls, creating a single-piece component that integrates the rotor bars and end rings.
For high-capacity or high-speed motor designs, copper bar rotors are used, secured by specialized welding procedures and end-ring reinforcing rings. This construction provides reliable performance under mechanical stresses, reduced slip loss, and stable startup characteristics.
The stator coil uses high-purity copper windings insulated with premium polyester film, glass cloth, and medium-to-high content mica tape. The fully wound stator core undergoes a computerized Vacuum Pressure Impregnation (VPI) cycle using solventless epoxy resins.
This VPI treatment eliminates air pockets within the slots, resulting in a solid winding block with high heat transfer rates, mechanical rigidity, moisture resistance, and corona prevention. The optimized slot fill-factor reduces stator copper losses, ensuring the motor meets IE3 and IE4 efficiency standards.
Designed using 3D multi-physics fluid and thermal structural simulation software, the high-strength cast iron frame features optimized cooling fin geometries. This design provides structural rigidity, dissipation pathways, and resonant frequency margins to isolate stator vibrations.
By preventing frame distortion and minimizing shaft misalignment under load, the design reduces mechanical friction losses in the bearings, contributing to the motor's overall operating reliability.
The low-noise ventilation system integrates a fan cowl, air deflector, safety grilles, and noise-damping baffles. Its lightweight design reduces structural vibrations, while the side-mounted air intake layout optimizes airflow in tight spaces.
This aerodynamic design reduces windage losses—which can account for 10% of total losses in high-speed motors. The fan cover features an IP22 ingress protection rating to prevent accidental contact with moving parts while maintaining airflow.
Deploying high-reliability motor systems across critical global infrastructure.
Explosion-proof motors (such as the YBBPX and YBX3 series) operate in environments containing flammable gases and volatile vapors. Featuring certified flameproof enclosures (ATEX/IECEx/EAC), these motors drive critical process pumps, compressors, and high-volume ventilation systems.
Underground coal mines require mechanical reliability. Utilizing design elements from the Morley mining line, our custom coal shearer cutting motors and high-voltage wound rotor induction motors withstand dust accumulation, voltage drops, and high starting-torque loads.
For clean energy generation, nuclear backup facilities, and grid stabilization, Laurence Scott-heritage motors and distributed synchronous condensers provide reactive power compensation and starting current profiles, ensuring grid stability and operational security.
Certified systems built to overcome international trade barriers and meet regional engineering standards.
Our global distribution strategy focuses on compliance with international testing frameworks, allowing seamless integration into global engineering packages:
Pioneering the next generation of industrial motion solutions.
While IE3 remains the baseline standard for many industrial sectors, we are actively expanding our portfolio of IE4 and IE5 super-premium efficiency systems. This includes permanent magnet synchronous motors (PMSM) like the WEPM series, which deliver high efficiency across a broad speed range, particularly under partial load conditions.
Our technology roadmap also focuses on digital integration. By embedding smart vibration and temperature sensors, our motors support real-time predictive maintenance. This allows plant operators to monitor motor health, predict bearing fatigue, and schedule maintenance to avoid costly unplanned downtime.
Integrating variable frequency PMSM lines to achieve IE4/IE5 efficiencies and replace standard induction motors in variable load applications.
Adding standard wireless sensor slots to monitor vibration, stator temperature, and current consumption in real time.
Redesigning winding configurations and frame casting materials to facilitate end-of-life recycling and remanufacturing.
Expert answers to common engineering, compliance, and application questions.
The difference lies in the allowable energy loss thresholds defined by IEC 60034-30-1. On average, IE4 motors reduce losses by approximately 15% compared to IE3 equivalents. To achieve this, IE4 designs incorporate optimized slot geometries, thinner electrical steel laminations, and increased active materials (such as copper and premium electrical steel).
Vacuum Pressure Impregnation (VPI) replaces traditional varnish-dipping methods. By extracting air under vacuum before applying resin under pressure, the process fills all voids in the stator windings. This creates a solid winding structure with improved moisture resistance, higher mechanical strength, and enhanced heat transfer to the frame.
Copper has higher electrical conductivity than aluminum, which reduces rotor resistance losses. For larger motors, copper bar rotors improve operating efficiency and reduce heat generation. While they require specialized welding and fabrication processes, they provide the durability needed for high-duty-cycle industrial applications.
Yes, our WE3 and WE4 series motors are VFD-ready. They feature insulation systems designed to handle the high voltage peaks (dv/dt) typical of modern PWM drives. For high-voltage or wide-speed-range applications, we recommend specifying insulated bearings on the non-drive end to prevent electrical erosion.
TESTSAFE is a recognized certification standard for equipment deployed in underground coal mines in Australia. Our compliance with the TESTSAFE framework confirms that our explosion-proof motors meet local safety requirements, simplifying import and certification processes for Australian operations.
We offer customizations including non-standard shaft configurations, specialized frame mounting dimensions, alternative cooling configurations (such as forced ventilation), integrated RTDs or thermistors, anti-condensation heaters, and specialized paint finishes for marine or chemical environments.
From high-voltage applications to specialized explosion-proof designs, our systems deliver reliable industrial performance.
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