Explore our elite portfolio of high-voltage explosion-proof, coal mine underground, low-voltage high-efficiency, and permanent magnet synchronous motors engineered for extreme reliability.
Shaanxi Nanfang Motor Technology Co., Ltd. is the highly trusted, authorized global distributor of Wolong Electric Drive Group Co., Ltd. Wolong, founded in 1984 and listed on the Shanghai Stock Exchange in 2002 (code SH600580), has spent over three decades establishing a preeminent position in the global industrial motor manufacturing space. As a massive industrial enterprise, Wolong operates 3 major manufacturing bases, 39 advanced factories, and 3 state-of-the-art R&D centers worldwide.
Wolong focuses deeply on electric motors and control systems, committing to a meticulous global brand strategy that fuses technology, research, process design, and world-class distribution channels. By partnering with leading engineering systems internationally, Shaanxi Nanfang Motor delivers direct access to Wolong’s industry-leading production capabilities, driving heavy industrial applications safely, efficiently, and cleanly.
Through strategic acquisitions of historic European and American brands, Wolong has consolidated the most robust and technologically rich electric motor alliance in global industry.
In 2011, Wolong acquired 97.94% of the Austrian ATB Group, one of Europe's top three motor manufacturers. This acquisition brought under Wolong's umbrella the renowned Morley brand—synonymous with premium, reliable underground coal mining motors with a 130-year legacy—and Laurence Scott, famous for developing low starting-current motors for nuclear power stations and generators for British naval vessels.
Brook Crompton, boasting over a century of electric motor design expertise, joined Wolong to push the limits of energy-efficient motor development. Known for its premium Brook Crompton 'W' and '10' series, this division leads technological development in low, medium, and high voltage AC motors tailored for hazardous and aggressive work environments.
Founded in Germany in 1882, Schorch joined Wolong in 2011. Schorch represents the gold standard for high-power, high-efficiency heavy industry motors, supporting critical projects across global petrochemical, oil and gas, metallurgy, water management, test stations, tunnels, and shipbuilding industries.
Dating back to 1999, Wolong established a powerhouse joint venture with OLI, the world leader in vibration motor (MVE) and Ex vibration sensor solutions. OLI stands out globally for supplying unparalleled flow-aid and compaction vibration products for concrete, mining, and industrial process plants.
Acquired by Wolong in 2015, CNE is China's largest research and production base for explosion-proof motors. The Nanyang base produces highly customized low-voltage and high-voltage Ex-proof motors serving the domestic and global petrochemical, coal mine, military, and nuclear power sectors.
In 2018, General Electric (GE) Industrial Motors division joined Wolong. As the oldest commercial electrical equipment creator, GE brings a vast legacy of medium and high voltage motor manufacturing expertise to Wolong, accelerating advancements in materials processing, steel production, and mining applications.
Maximizing production capability through high-end automation, lean manufacturing, and robust vertical integration in China’s premier industrial zones.
By using fully automated high-precision punching, winding, and laser welding equipment, our factories minimize human error and achieve micro-level tolerances. This drastically improves the power density and operational lifetime of every asynchronous and synchronous motor produced.
Our proximity to primary steel mills producing high-grade silicon steel sheet laminations, together with long-term copper and casting foundry alliances, insulates our manufacturing timeline from global logistics volatility, guaranteeing predictable lead times.
Wolong has engineered smart energy management systems directly into its factories, using its own premium high-efficiency synchronous motors to power assembly processes, reducing energy consumption and aligning with global Net Zero manufacturing expectations.
An overview of stator, rotor, frame, and ventilation engineering that ensures Wolong motors endure the harshest operating conditions globally.
The rotor features a highly durable squirrel cage design, with cast aluminum rotors being widely utilized. These rotors are produced using either centrifugal aluminum casting or die-casting techniques, where molten pure aluminum is poured into the slots of the rotor core, resulting in a single-piece construction that integrates the rotor bars and end rings.
The structural integrity and manufacturing process of cast aluminum rotors guarantee the motor rotor's reliability, and also endow the motor with outstanding torque properties. For larger capacity motors, copper bar rotors are employed, which benefit from dependable bar securing and end ring welding procedures. Additionally, the protective ring design of high-speed motors further ensures the reliable operation of the copper bar rotor.
The coil is crafted from high-grade polyester film and reinforced with premium glass cloth, utilizing either low-powder mica tape with a high mica content or medium-powdered mica tape with an abundance of mica. Following the VPI (Vacuum Pressure Impregnation) process, a pristine white coil emerges from the production line. After the billet is extracted from the wire, it proceeds through the VPI process to transform into a finished, fully sealed unit.
The winding and insulation are meticulously engineered to provide exceptional electrical performance, mechanical strength, resistance to moisture, and long-term thermal stability under continuous heavy loads.
The motor frame employs a fully digital platform for structural and fluid multi-physics field simulations. This simulation platform retains the original patent's structure and design, utilizing mature, high-strength cast iron (or steel as an alternative).
The frame boasts exceptional structural redundancy, outstanding heat dissipation properties, and ample inherent frequency isolation margins for the entire machine. It is engineered to endure significant mechanical shocks, maintain a superior vibration level, and ensure a lower temperature increase in the motor, preventing thermal runaway.
The low-noise fan cover system comprises a fan cover body, an air guide cylinder, a protective window, and an acoustically optimized silencer plate. Its compact structure and lightweight design facilitate vibration reduction. The air inlet is situated on the side, which optimizes the avoidance of obstacles behind the motor, minimizing adverse effects on ventilation and reducing noise caused by energy loss during propagation path changes.
The system also incorporates sound-absorbing materials that absorb high-frequency noise, thereby lowering the overall motor noise. Additionally, the fan cover is rated IP22, ensuring that hands cannot come into contact with the rotating fan blade.
WOLONG's motors and drives are built to power complex operations across diverse hazardous and heavy-duty industrial landscapes globally.
Fitted with high-voltage explosion-proof motors (such as YBXKK, YKK, and YBBPX series), our systems run hazardous process pumps, large gas compressors, and offshore drilling platforms safely under extreme temperatures, meeting certified ATEX and IECEx standards.
For conveyors, shearers, and ventilation fans deep underground, we provide heavily reinforced flameproof motors (like the Morley series, YBK3, and YBSS). These motors resist dust build-up, damp conditions, and high-impact physical stress.
Featuring our Distributed Synchronous Condenser Solutions, these systems support grid inertia and manage reactive power compensation. Crucial for nuclear, wind, and solar grid interfaces to maintain structural grid stability.
Charting the course for ultra-efficiency, smart industrial IoT integration, and super-conductive powertrain design.
As energy costs climb, the demand for ultra-efficient motors escalates. Wolong is leading this curve by refining its WEPM Permanent Magnet Synchronous Motors to achieve IE5 efficiency ratings, drastically outperforming traditional induction motors at partial loads. Work is already underway on developing high-density permanent magnet rotors that approach IE6 efficiency targets through advanced magnetic circuit simulation.
Future heavy-duty motors will no longer operate as isolated machines. Wolong's upcoming systems feature integrated vibration sensors, temperature probes, and current waveform telemetry linked directly to cloud diagnostics. Our research utilizes AI engines to analyze high-frequency current signatures to predict stator coil degradation, bearing failure, or rotor misalignment weeks before a shutdown occurs.
Adhering to strict international standards to guarantee safe operation, seamless custom clearances, and dependable local engineering support.
Nemko/Atex
CSA
CE
CCC
SABS
TESTSAFE
WOLONG has secured the majority of high-tier product certifications, enabling rapid penetration into any global market:
Critical engineering metrics procurement managers must verify prior to sourcing medium-voltage and high-voltage industrial motors.
Industrial motors running on 6kV, 10kV, or 11kV networks require carefully designed winding profiles to manage starting current drops. Systems like Laurence Scott specialize in keeping starting currents minimal, ensuring the motor starts smoothly without destabilizing local power substations.
For applications experiencing heavy start-stop cycles (S3 to S6 duty types), purchasing teams must specify Class H or Class F insulation. Standardizing on VPI-impregnated mica insulation prevents rapid stator breakdown caused by high thermal peaks.
For chemical and fan applications outdoors, standardizing on IP55, IP56, or IP65 prevents dust and high-pressure water from breaching the frame enclosure. Fans and pump motor drives must be specified with IP ratings matching their localized environmental challenges.
Expert answers to the most common engineering and procurement questions regarding high-efficiency and explosion-proof motors.
Vacuum Pressure Impregnation (VPI) forces the high-grade mica insulation varnish deep into all empty spaces of the winding structure under intense vacuum and pressure. Hand-dipping often leaves small air pockets that can cause partial electrical discharge, leading to winding failure. VPI stator coils offer significantly better moisture resistance, thermal transfer, and mechanical resistance against operational vibrations.
European mine environments require motors certified to ATEX Directives (Group I Category M1/M2) and international IECEx standards. In contrast, North American mines reference MSHA guidelines or CSA/UL standards (Class I, Division 1/2, Groups C & D). Shaanxi Nanfang Motor provides Wolong motors holding dual certification profiles, resolving cross-border regulatory compliance issues.
A PMSM uses rare-earth permanent magnets embedded in the rotor core to establish a magnetic field, which eliminates the copper losses (rotor current heat loss) inherent in standard induction motor squirrel-cages. This yields much higher power density and keeps operating efficiency exceptionally high, even when the motor runs at partial loads (between 25% and 75%).
Australia enforces some of the world's most demanding underground mining safety regulations. Obtaining TESTSAFE certification confirms that Wolong's explosion-proof coal mining motors comply fully with Australian mechanical and flameproof parameters, removing customs roadblocks and certifying the motors for installation in high-methane coal mine environments.
The system features an aerodynamic side air inlet combined with internal sound-absorbing acoustic panels. Placing the air intake on the side minimizes rear flow obstructions. This minimizes pressure drops and air turbulence, reducing fan noise by up to 5-10 dB(A) while keeping airflow volumes high enough to cool the frame effectively.
Select from our globally certified high-voltage asynchronous, coal shearer cutting, NEMA standard, and variable frequency explosion-proof motor systems.
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