Explore our industrial-grade electric motor portfolios engineered to meet complex certifications and rigorous efficiency standards worldwide.
As an authorized distributor of Wolong Electric Drive Group Co., Ltd, Shaanxi Nanfang Motor Technology sits at the vanguard of the global industrial drive market. Wolong was founded in 1984 and listed on the Shanghai Stock Exchange in 2002 (SH600580). Over three decades of hyper-growth, Wolong has erected 3 R&D Centers, 3 Manufacturing Bases, and 39 State-of-the-Art Factories across the world.
By prioritizing a strict internationalization strategy, Wolong has synthesized design, engineering, sales, and manufacturing capabilities on a scale few competitors can match. From petrochemical refineries to heavy mining conveyors, our industrial motor line-up drives critical infrastructure globally under the banner of safety and efficiency.
Understanding regional requirements, environmental variations, and regulatory compliance is paramount for seamless project engineering.
Compliance in the European Economic Area demands rigorous adherence to the Machinery Directive 2006/42/EC, Low Voltage Directive 2014/35/EU, and EMC Directive 2014/30/EU. For hazardous environments, the ATEX Directive (2014/34/EU) classifies explosion protections into Group II Zones, necessitating highly specific test parameters and third-party certifications.
For operations in the USA, Canada, and Mexico, procurement parameters must align with National Electrical Manufacturers Association (NEMA) standards. Frame dimensions, nominal voltages (typically 2300V, 4160V, or 6600V), and energy levels defined by CSA and UL are non-negotiable for system integrations.
High Voltage motors face relentless trials: extreme desert heat, sub-zero offshore breezes, coal dust infiltration, and saline corrosive moisture. Heavy industrial operators mitigate failures by specifying higher ratings: IP55, IP56, or IP66 enclosures alongside specialized Class H insulation, anti-condensation heaters, and customized RTD thermal probes.
Selecting a high voltage motor goes far beyond mechanical power output (kW or HP). Procurement teams must evaluate:
Combining the heritage of legendary electric motor manufacturers under one global powerhouse to deliver unparalleled technology.
Acquired in 2011, Austria's ATB Group is one of Europe's top three motor manufacturers. Known for high-efficiency European standard AC motors, ATB's division provides the technical backbone for our premium industrial electric drives. The acquisition brought industry pioneers Morley and Laurence Scott under the Wolong umbrella.
Morley: Boasting over 130 years of history, Morley is synonymous with underground coal mine drive equipment. Their ultra-durable flameproof motors deliver continuous power for heavy-duty conveyors.
Laurence Scott: Renowned for powering British nuclear plants and naval vessels with customized low-starting-current generators and machinery.
A centennial heavyweight, Brook Crompton has led motor design for over a century. Known for premium, energy-efficient low, medium, and high-voltage AC motors (including the Brook Crompton "W" and "10" series), they specialize in harsh-environment operations and user-friendly adjustable speed drive packages.
Established in 1882 in Germany, Schorch joined Wolong in 2011. Schorch provides heavy industrial driving systems globally, supporting high-profile international projects in oil & gas, chemical processing, power generation, water transmission, shipbuilding, and steel processing.
In 2018, General Electric's commercial and industrial motor division integrated into Wolong. This strategic partnership combines GE's historic manufacturing expertise in oil & gas, metals, mining, and pulp/paper with Wolong's digitalized supply chain and automated production bases.
A global leader in electric vibration motors (MVE series) and Ex-rated vibration sensors. Jointly operated in China since 1999, OLI provides highly specialized industrial vibrators for materials handling, bulk packaging, mining sifting, and chemical flow assistance.
A comprehensive breakdown of the structural components that define our high voltage and explosion-proof motors.
Our rotors feature a highly reliable squirrel-cage design. For standard and medium capacities, we utilize premium cast aluminum rotors produced via centrifugal casting or high-precision die-casting. This flows molten pure aluminum directly into the slots of the rotor core, forming a single-piece structure that integrates rotor bars and end rings.
For larger, high-output HV motors, we deploy copper-bar rotors. These bars are secured using a proprietary end-ring welding process. For high-speed applications, we add protective retaining rings to prevent centrifugal deformation, ensuring stable operation under variable loads.
The stator coil is wrapped in polyester film and reinforced with high-density, low-powder or medium-powder mica tape. The stator then undergoes a multi-stage Vacuum Pressure Impregnation (VPI) process, emerging as a consolidated, moisture-resistant core.
Our VPI process completely eliminates air pockets within the slots, maximizing dielectric strength, heat transfer, and mechanical rigidity. The Class F insulation system (with Class H capability) ensures the stator withstands thermal stresses and voltage spikes from VFD drives.
Our motor frames are engineered using multi-physics simulations for structural dynamics and heat dissipation. Constructed from high-tensile cast iron or welded steel plates, the frames feature optimized cooling fins to maximize surface area.
The design provides high structural rigidity, minimizing mechanical resonance and keeping vibration levels well within ISO standards. This rugged framework ensures quiet operation, low temperature rises, and long bearing life in harsh conditions.
Our low-noise fan cover system integrates a lightweight fan cover, an air guide cylinder, protective windows, and integrated silencer plates. The side-entry air inlets bypass obstacles behind the motor, reducing energy losses and aerodynamic noise.
Sound-absorbing liners target high-frequency noise from the cooling fan. Ratings up to IP22/IP55 ensure optimal safety by preventing contact with rotating parts while maintaining high cooling airflow.
Every motor undergoes multi-point quality assurance, load testing, and environmental simulation before shipment.
Wolong motors comply with major international standards, easing integration into hazardous locations and regulated markets.
Nemko / ATEX
CSA
CE
CCC
SABS
TESTSAFE
By maintaining a broad array of product certifications, Wolong simplifies integration into international projects:
Our motors are designed for high-stress applications in heavy industries worldwide.
Operating in hazardous Class I Division 1/2 and Zone 1/2 areas, our explosion-proof variable frequency motors (WEBP3 series) and positive pressure brushless excitation synchronous motors (TZYW series) ensure safe operation in hydrocarbon-rich environments.
Designed for high dust, high moisture, and explosive methane environments. The Wolong YBK3 series, YBSD series, and YBSS series flameproof motors power underground coal conveyors, cutters, and water drainage pumps.
Our YKS and Y3 series high-voltage motors provide continuous power to city water works, thermal power plant cooling systems, ventilation networks, and metal plant air compressors.
Our commitment to green energy and digitalized diagnostics shapes our R&D priorities.
To support global carbon neutrality goals, we are transitioning our core high-voltage portfolios to IE4 and IE5 standards. By integrating permanent magnet (PM) synchronous technologies and synchronous reluctance designs, we reduce energy losses by up to 20% compared to traditional induction motors.
The future of industrial maintenance relies on real-time diagnostics. Our upcoming motor series will include integrated vibration, temperature, and magnetic flux sensors. These edge-computing sensors monitor insulation and bearing health, feeding data to centralized cloud systems to enable predictive maintenance and prevent unplanned downtime.
Using advanced thermal fluid dynamics and higher-grade materials, we continue to shrink motor footprints. By utilizing silicon steel laminations with lower core loss and high-density copper slot fillings, we pack higher output power into smaller frame sizes.
As green hydrogen infrastructures expand, we are developing explosion-proof motors certified for hydrogen atmospheres (Group IIC gas groups). Our seal and surface temperature protection technologies ensure safe operation in alternative fuel plants.
Deploying major capital equipment requires dedicated global support, localized engineering, and reliable warranty services.
Our certified field engineers support your staff with local installation, shaft alignment, and initial starting tests, ensuring compliance with warranty parameters.
We provide remote engineering support to troubleshoot starting anomalies, vibration spikes, or insulation concerns, keeping your operations running smoothly.
We assist your engineering teams with compliance documentation, generating custom test reports, drawing packages, and certificate copies for local authorities.
Common technical questions from procurement officers and engineering teams regarding high voltage motor integration.
Under IEC and EN standards, low voltage typically covers up to 1000 V AC. Anything above 1000 V AC up to 15 kV AC is generally classified as Medium to High Voltage. For NEMA standards, high voltage motors typically refer to voltages starting from 2300 V, up to 4160 V, 6600 V, or 13800 V, which require specialized insulation systems and winding configurations.
The VPI process places the wound stator in a vacuum chamber to remove air and moisture from the winding slots. High-grade solventless epoxy resin is then injected, and pressure is applied to force the resin deep into the insulation layers. This creates a solid block that resists moisture, chemicals, and mechanical vibration, while improving heat transfer from the windings to the stator core.
ATEX is a mandatory European Union directive based on EN standards, requiring CE marking. IECEx is an international certification scheme based on IEC standards, designed to facilitate global trade. China Ex (under CQST/CNEx) is the national standard for China. While they share similar testing methodologies for flameproof (Ex d) or increased safety (Ex e) designs, local certificates must be issued by the respective national bodies.
To prevent damage from high-frequency shaft currents and voltage spikes (dV/dt) caused by Variable Frequency Drives, we insulate the non-drive end bearing (or install ceramic bearings). Additionally, we utilize Class H insulation materials and reinforce the stator winding end-turns to withstand electrical stress.
Explore the remainder of our high-voltage and flameproof motor line-up, designed for conveyors, water pumps, and severe industrial duties.
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