Direct global access to certified drive systems engineered for Class I, Division 1 & 2, Zone 1 & 2 hazardous locations.
In modern global heavy industries, electrical motors represent the backbone of operations, driving pumps, compressors, fans, and heavy machinery. However, operating this equipment in environments containing volatile gases, flammable vapors, combustible dusts, or explosive fibers introduces catastrophic risks of ignition and detonation. To prevent catastrophic failure, high-efficiency, certified explosion-proof motors for industrial use have evolved from simple passive enclosures to complex, integrated multi-disciplinary systems incorporating smart sensors, VFD optimization, and innovative materials.
Currently, global safety standards demand strict compliance with regional and international codes such as ATEX in Europe, IECEx globally, CSA and UL in North America, and EAC/CU-TR in Eurasia. The industrial trend is rapidly shifting toward higher efficiency levels (IE4 and IE5 Super/Ultra-Premium efficiency), optimized permanent magnet synchronous topologies, and integrated variable frequency speed control, ensuring maximum uptime, system safety, and lowered energy profiles.
Connecting industrial operators to the world’s most comprehensive explosion-proof drive technology framework.
Shaanxi Nanfang Motor Technology Co., Ltd. is the authorized distributor of Wolong. Founded in 1984, Wolong Electric Drive Group Co., Ltd. was successfully listed in 2002 (code SH600580). Over three decades of hyper-growth, Wolong has established a vast manufacturing and R&D footprint, operating 3 global manufacturing bases, 39 state-of-the-art factories, and 3 global R&D centers. Committed to a global brand strategy, Wolong has integrated a powerful portfolio of century-old motor brands, achieving undisputed leadership in global motor and drive control technology.
Accumulated with abundant asset and brilliant experiences in manufacturing, WOLONG started to reach for higher attempts. To be the leading manufacturer of AC motors & drives worldwide, WOLONG strove to acquire the oversea groups.
In 2011, WOLONG company acquired strong technical and technological supports. WOLONG’s holdings group successfully acquired 97.94% of the Austrian ATB Group (ATB motor), one of the three major European motor manufacturers, and became the actual controller of the ATB Group, transforming into a world-renowned global motor manufacturer. ATB motor group included the brand Morley in mining industry and Laurence Scott, both excellent in motor manufacturing.
Morley Motor, with its nearly 130-year history, has been closely linked to underground coal mining. Currently, the Morley brand is highly esteemed in the global underground coal market and has become synonymous with quality, power, and reliability.
Laurence Scott, the pioneering company that supplied motors for British nuclear power plants, is currently renowned for manufacturing equipment with low starting currents and also equips British naval vessels with generators. Following its acquisition by WOLONG, the company has been honored with the Queen's Award for three consecutive years.
Furthermore, Brook Crompton Motors joined the WOLONG group as well. Brook motor stands as a venerable and profoundly skilled participant within the electric motor sector, boasting over a century of mastery in the technology and design of electric motors. With its extensive background in technological innovation and design, Brook Crompton Motors leads the way in motor technology advancements and pioneers in the creation of energy-efficient motors. Driven by technology and innovation, Brook Crompton Motor has developed a complete range of low voltage, medium voltage, and high voltage AC motors.
Schorch electric motor joined WOLONG in 2011. Since its establishment in 1882, Schorch has set the standard for high-quality motors. The company offers a diverse range of driving systems to customers globally, catering to both domestic and international projects.
Regarding vibration motors (MVE) and Ex vibration sensors, the OLI Brand owns the largest market around the globe. Dating back to the year of 1999, WOLONG jointly started the business with OLI vibration motor in China.
In 2015, WOLONG Electric Nanyang Explosion-Proof Group Co., Ltd. (CNE), China's largest explosion-proof motor scientific research and production base, joined the WOLONG Group. With various types of explosion-proof motors, low voltage asynchronous motors, and Ex-proof high voltage motors, Nanyang Explosion Group’s motors are mainly used in oil, coal, chemical, metallurgy, electricity, military, nuclear power, and other fields.
In 2018, General Electric (GE) commercial and industrial motor division joined the ranks of WOLONG. As the oldest manufacturer of commercial and industrial electrical equipment, GE caters to a multitude of heavy industries, encompassing oil and gas, petroleum and chemicals, power generation, mining, metal processing, water treatment, and materials processing.
Discover the structural integrity and materials science that make Wolong motors highly reliable in hazardous situations.
The rotor features a 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 under heavy dynamic loads.
The coil is crafted from polyester film and reinforced with 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 thermal stability in highly humid or corrosive atmospheric environments.
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 depending on specific configuration parameters).
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, thereby maintaining Ex integrity.
The low-noise fan cover system comprises a fan cover body, an air guide cylinder, a protective window, and a 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 noise, thereby lowering the overall motor noise. Additionally, the fan cover is rated IP22, ensuring that hands cannot come into contact with the fan, while preserving maximum air-moving performance.
Why heavy industrial engineers, plant managers, and procurement officers globally choose Wolong motors.
Wolong has established motor and drive control R&D centers in China, Europe, and Japan, and established a central research institute in Shanghai. It is committed to the research of leading technologies in the field of motor and control technology. Some products have reached the international leading level, specifically in permanent magnet drive logic.
Wolong owns leading domestic brands such as Nanyang Explosion, as well as internationally renowned century-old brands like Brook Crompton, Morley, Laurence Scott, Schorch, and ATB. This represents a deep-seated reputation across critical fields including oil and gas, petrochemicals, power plants, and coal mines.
As a leading motor manufacturer, Wolong has significant advantages in explosion-proof performance, reliability, and durability. Widely utilized in coal mines and chemical processing, our motors have passed rigorous certifications by national and international authoritative agencies, including ATEX, IECEx, and CU-TR.
Adhering to strict international protocols to facilitate seamless global export, integration, and risk mitigation.
WOLONG has secured major global product certifications, enabling operations to comply with various regional requirements:
Engineered to drive heavy machines in ventilation, refrigeration, petrochemicals, maritime, and automation.
As a globally esteemed manufacturer of motors and drive solutions, WOLONG boasts 39 manufacturing facilities and 4 R&D centers across various countries, including China, Vietnam, the United Kingdom, Germany, Austria, Italy, Serbia, Mexico, and India.
WOLONG's diverse range of motors finds application across a multitude of industrial sectors, serving equipment such as fans, water pumps, compressors, and engineering machinery. These motors are integral to various industries, including ventilation and refrigeration, construction, oil and gas, petrochemicals, coal chemistry, metallurgy, electric and nuclear power, maritime, and industrial automation. WOLONG's mission is to deliver optimal solutions and services to our customers.
Customized ex-protection standards for oil refineries, chemical storage, offshore drilling rigs, and grain processing facilities, meeting various international regulations.
IE5, IE4, and IE3 options are available, alongside highly specialized permanent magnet synchronous designs (PMSM) to minimize carbon footprints and lower operating costs.
Covering low, medium, and high-voltage AC motors, flameproof frames, pressurized casings, and water-cooled mining systems built for demanding applications.
Pioneering the next generation of safe, connected, and energy-efficient rotating machinery.
To meet strict global energy mandates, Wolong's technology roadmap focuses on permanent magnet motors (WEPM series) and advanced variable frequency synchronization (TBVF series). By combining low rotor losses with sophisticated electromagnetic design, we help operators reduce carbon emissions and minimize thermal output in dust-prone environments.
We are actively integrating vibration, temperature, and magnetic flux sensors directly inside the explosion-proof motor shell. These sensors operate within intrinsically safe limits, providing real-time data to edge gateways without compromising the physical flameproof integrity of the motor frame.
Direct technical responses to common engineering queries regarding explosion-proof motors.
Explore additional specialized drive systems, permanent magnet designs, and distributed condenser systems.
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