Explore our certified range of low-voltage and high-voltage three-phase asynchronous motors designed for hazardous locations and heavy-duty industrial processing applications.
An in-depth analysis of energy optimization directives, decarbonization target integration, and global procurement trends.
The global heavy manufacturing, petrochemical, processing, and mining industries are currently traversing an unprecedented transition. Spurred by international carbon neutrality targets and rising electricity rates worldwide, industrial procurement programs are shifting their focus away from standard low-cost motor solutions to premium, ultra-high-efficiency electric systems. Statistics indicate that industrial electric motors account for nearly 45% of global electrical energy consumption. Consequently, upgrading to IE3, IE4, or IE5 efficiency class motors presents a direct, verifiable path to reducing operational emissions and mitigating bottom-line financial exposures.
Within hazardous processing environments—such as petroleum extraction rigs, offshore oil tankers, subterranean coal mines, and volatile chemical plants—power systems are exposed to flammable vapours, explosive gas mixtures, and high concentrations of combustible dust. Under these challenging conditions, normal electric machinery can act as an ignition source. This risk highlights the critical importance of selecting CE-certified, ATEX-compliant, and IECEx-registered explosion-proof AC motors. These compliance regimes ensure that every component, from the terminal box connection to the interior winding insulation, is designed to contain any internal deflagration or prevent surface temperatures from exceeding safe operational limits.
A CE (Conformité Européenne) mark indicates that industrial AC motors comply with European health, safety, and environmental protection standards. For procurement executives and system integrators across the EEA, North America, and parts of APAC, a CE mark is more than just a regulatory necessity; it serves as a reliable indicator of robust insulation systems, durable mechanical frameworks, and comprehensive thermal design verification.
Simultaneously, the demand for localized engineering support, fast factory-to-port logistics, and adaptive customized designs has increased. Modern industrial projects require motors engineered to meet precise duty cycles, high altitude requirements, or unique marine conditions. Suppliers capable of combining high-volume production efficiency with customized engineering are leading the current market shift toward high-performance industrial drive systems.
Empowering global infrastructure through Shaanxi Nanfang Motor Technology Co., Ltd and the manufacturing network of Wolong Electric Drive Group.
Shaanxi Nanfang Motor Technology Co., Ltd serves as the authorized global distributor for Wolong Electric Drive Group Co., Ltd. Founded in 1984 and listed on the Shanghai Stock Exchange in 2002 (code SH600580), Wolong has grown to become a global leader in motor technology, process development, and international manufacturing distribution. With 3 main manufacturing bases, 39 factories, and 3 state-of-the-art research centers worldwide, Wolong delivers highly engineered motor solutions tailored to modern industrial requirements.
This global supply capability is backed by strong domestic engineering expertise and close alignment with major global standard groups. The partnership ensures that petrochemical facilities, mines, and industrial sites receive high-performance drive equipment, along with dedicated technical consulting, on-site commissioning assistance, and post-installation support.
How the integration of local manufacturing efficiency and European engineering heritage delivers high value to global buyers.
The efficiency of Chinese manufacturing facilities is a key driver of value in the global heavy industrial motor market. Wolong’s production model combines high-volume Chinese manufacturing with advanced European engineering designs. This approach ensures that motors are produced with short lead times, precise mechanical tolerances, and competitive pricing, all while meeting or exceeding global quality standards.
Key components of this manufacturing strategy include:
By producing electrical laminations, copper wires, and cast iron housings within a localized supply chain, factories minimize production delays and maintain tight control over component quality.
Robotic winding lines, automated CNC machining centers, and automated testing bays ensure high repeatability, reducing errors and optimizing insulation systems.
Every motor undergoes load tests, insulation resistance checks, and vibration analyses prior to shipment, meeting the requirements of European, American, and Asian compliance organizations.
WOLONG's strategic development and integration of prestigious international electric motor manufacturers.
WOLONG's growth strategy relies on integrating global motor engineering heritage. By acquiring established brands in key regions, WOLONG has brought together over a century of research and development experience, standardizing these high standards across its global production facilities.
WOLONG acquired 97.94% of the Austrian ATB Group. This acquisition integrated the ATB motor brands, including Morley (known for underground mining motors) and Laurence Scott (recognized for low starting currents and naval generators).
WOLONG integrated Brook Crompton, a pioneer in energy-efficient low and high-voltage motors, and Schorch (founded 1882), a supplier of heavy-duty drive systems for oil & gas and petrochemical industries.
In 2015, CNE (Nanyang Explosion-proof Group) joined WOLONG. This was followed in 2018 by the integration of GE’s commercial and industrial motor division, further strengthening the company's high-voltage engineering and manufacturing capacity.
An engineering-level review of rotor, stator, frame, and ventilation systems designed for demanding operating environments.
The rotor features a squirrel cage design. Cast aluminum rotors are produced using centrifugal aluminum casting or die-casting techniques, where molten pure aluminum is poured directly into the slots of the rotor core. This creates a single-piece construction that integrates the rotor bars and end rings, delivering stable torque and durability.
For larger capacity motors, copper bar rotors are used. These feature welded copper bars and end rings, designed to withstand high thermal and mechanical stress. The high-speed designs also include protective rings to help maintain rotor stability under high dynamic loads.
The stator windings are constructed using high-grade copper wires insulated with polyester film and reinforced with glass cloth. Winding insulation utilizes low-powder or medium-powder mica tape with high mica content, which is key to withstanding voltage spikes and thermal stress.
The completed stator assembly undergoes a Vacuum Pressure Impregnation (VPI) process. This ensures that the varnish fully penetrates the stator structure, eliminating air voids to protect the motor from moisture, dust, chemical vapors, and electrical breakdowns.
The structural designs are developed using digital multi-physics simulation platforms, which model fluid dynamics and structural stress. The frames are cast from high-strength iron (with steel options available for specific configurations) to provide high structural strength and protection against external impacts.
This design maximizes surface area for heat dissipation while managing vibration frequency margins, helping protect internal bearings and components from mechanical fatigue and high temperatures.
The low-noise ventilation system consists of an aerodynamic fan cover body, an air guide cylinder, a protective window, and an integrated silencer plate. This layout helps direct cooling air over the frame fins with minimal drag.
The side-inlet design helps optimize airflow in tight installations where obstacles might otherwise block ventilation. Sound-absorbing materials within the hood minimize operating noise, and the IP22 rating prevents contact with the moving fan blades.
A comprehensive system of approvals enabling deployment across international markets and hazardous locations.
Nemko / ATEX
CSA
CE
CCC
SABS
TESTSAFE
To support global trade, WOLONG maintains a wide range of product certifications, helping ease regulatory compliance for international projects:
Proven reliability in demanding environments, supporting critical machinery and high-stakes infrastructure.
WOLONG's industrial motors are deployed globally across a variety of sectors, providing power to key machinery, including pumps, fans, compressors, and conveyors. Our engineering is tailored to meet the specific demands of each application:
In refining and extraction operations, motors run continuously in atmospheres containing flammable hydrocarbons. WOLONG's flameproof and positive-pressure motors provide reliable operation for critical pumps and gas compressors in these hazardous locations.
For heavy conveyors and coal cutters, motors must endure high dust levels, physical impacts, and high starting loads. The Morley-designed mining motors are built with robust cast frames and specialized windings to operate reliably in underground mines.
High-power municipal water systems, desalination plants, and wastewater facilities require continuous, high-efficiency operation. WOLONG's high-voltage asynchronous motors provide the constant torque needed for large-capacity water pumps.
Additionally, the company serves sectors such as power generation (including nuclear plants), marine ventilation, metal processing, and industrial automation. Each motor is configured to match local grid parameters, environmental conditions, and mechanical coupling requirements, supporting long-term performance.
Key considerations for engineering procurement managers selecting industrial AC motors.
When sourcing industrial-grade AC motors, procurement teams should evaluate several factors beyond the initial purchase price. A comprehensive evaluation helps ensure long-term reliability and compliance with project specifications:
Expert answers to common technical, commercial, and regulatory questions regarding CE-certified AC motors.
Explore our high-voltage and variable frequency motor designs built for heavy-duty industrial processing applications.
Need support with custom motor designs, compliance documentation, or bulk pricing? Get in touch with our technical sales team for comprehensive project assistance.
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