Explore our leading selection of high-voltage and low-voltage explosion-proof induction and permanent magnet synchronous motors designed for global hazardous locations and extreme industrial operations.
As the authorized primary distributor of Wolong, Shaanxi Nanfang Motor Technology Co., Ltd. supplies high-performance industrial electric motors and complex drive systems globally. Wolong Electric Drive Group Co., Ltd., founded in 1984 and listed on the Shanghai Stock Exchange in 2002 (code SH600580), has established itself as an undisputed pioneer in the global rotating machine industry. With more than three decades of intensive development, Wolong manages 3 key multinational manufacturing bases, 39 state-of-the-art factories, and 3 global R&D hubs. Wolong’s corporate mission revolves around unified motor and control system design, leveraging premium acquisitions to deliver unmatched energy efficiency and explosion-proof safety to critical industries worldwide.
Through intentional international acquisitions, Wolong has combined centuries of European and American motor craftsmanship under a single industrial supply umbrella:
Combining the heritage of century-old Western brands with highly modern manufacturing processes to form an unbeatable global motor supply framework.
Accumulated with abundant assets 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, becoming the actual controller of the ATB Group, and transforming into a world-renowned, high-strength global motor manufacturer. ATB motor group included the brand Morley in the mining industry and Laurence Scott.
Both are 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. It is a manufacturer that can provide the mine motor with high-specification, high-performance, high-quality electrical equipment for the global market. 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 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, including the premium Brook Crompton “W”, “10” series and motors suitable for operation in hazardous and harsh environments. Brook Crompton also provides user-friendly adjustable speed drive packages to provide users with efficient and reliable drive systems.
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. Schorch collaborates with its strongest partners to provide services across various industries, including oil and gas, chemicals, power generation, water supply and wastewater management, shipbuilding, steel and metal processing, test stations, tunnels, and so forth.
Regarding the vibration motor(MVE) and Ex vibration sensor, OLI Brand owns the largest market around the globe. Dating back to the year of 1999, WOLONG has 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 bases, joined the WOLONG Group and successfully realized the strategic cooperation. With various types of explosion-proof motor, low voltage asynchronous motor, Ex-proof high voltage motor, and so forth, 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) 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 and metal processing, paper, water treatment, cement, and materials processing. With the abundant experience in electric motor manufacturing, GE provides huge support to WOLONG.
WOLONG, originating in the city of Shangyu and burgeoning in China, is now rising as a global pioneer in the advanced cultivation and innovation of electric motor manufacturing!
A granular look at the specialized mechanical components and thermal technologies that define our high-reliability rotating machinery.
The rotor features the 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 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 unit. The winding and insulation are meticulously engineered to provide exceptional electrical performance, mechanical strength, resistance to moisture, and thermal stability.
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.
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.
Adapting advanced CE-certified electric motors to handle region-specific field demands and specialized process requirements across international projects.
For operations in Australian and South African coal mines, our customized flameproof motors (engineered with Morley’s 130-year legacy) drive heavy-duty tunnel boring machines (TBMs) and water pump circuits. Equipped with TESTSAFE compliance certifications, these motors withstand high humidity, abrasive coal dust, and violent mechanical stresses, keeping deep-shaft extraction safe and continuous.
In Middle Eastern and European refineries, positive-pressure YZYKS series motors operate safely in Zone 1 and Zone 2 gas-hazardous locations. These configurations prevent combustible gases from entering the main enclosure, ensuring optimal reliability for massive gas compressors and hydrocarbon pumps under extreme ambient heat.
For municipal water distribution and ventilation networks across Western Europe, we supply IE4/IE5 ultra-high efficiency induction and permanent magnet synchronous motors. By reducing electrical losses, these systems help utilities comply with the EU Ecodesign Directive while keeping utility lifecycles cost-effective.
Combining vertically integrated manufacturing with next-generation materials science to secure global industries against volatile markets.
Wolong utilizes a highly resilient supply chain centered in China, combining raw material sourcing with complete in-house component fabrication. Key strategic benefits include:
We continue to evolve our design platforms to address global decarbonization goals and the growth of smart factory technologies:
Our motors are certified to comply with strict international regulatory frameworks, facilitating smooth project execution and safety approval.
ATEX Ex
IECEx Safety
CE Conformity
ISO 9001
CSA Standard
TESTSAFE Ex
SABS Quality
EAC CU-TR
Nemko Atex
Adhere to the comprehensive marketing strategy for the electric motor and the entire industry chain: WOLONG has secured the majority of product certifications, enabling it to penetrate the international market.
- ISO standard: WOLONG becomes the ISO 9001 Ex motor manufacturer. ISO standard has evolved into a critical gateway for businesses to surmount international trade barriers and penetrate the global markets. It has also become a fundamental prerequisite for WOLONG to engage in production, business operations, and trade. Qualified with ISO9001 certification (International Organization for Standardization), WOLONG’s motors and equipment are trustworthy and dependable.
- NEMA standard: To confirm that WOLONG’s electric motors meet NEMA's mechanical performance specifications, we conduct thorough testing, which generally includes the efficiency test, insulation resistance testing, starting current and torque test, durability testing, vibration and noise testing and so forth. For low-voltage motor, WOLONG successfully acquired the UL (Underwriters Laboratories), CSA (Canadian Standards Association) certificates.
- IECEx and ATEX standard: For low & high-voltage motor and explosion-proof motor, WOLONG has acquired the IECEx and ATEX certificates. So it’ll be helpful to export motors to European countries (EU).
- TESTSAFE standard: Testsafe, the largest coal product certification body in the Southern Hemisphere. The acquisition of Testsafe has completely opened up the channel for Chinese coal mining motors to enter Australia, laid a solid foundation for WOLONG’s coal mining equipment to enter the Australian market or other international markets, and it will further enhance the international influence of WOLONG's integration with the international community.
Allows safe operations within Europe's highly regulated hazardous atmosphere fields.
Full mechanical and electrical certification validating high-durability operation across North American infrastructure networks.
Ensures compliant installation and service within the Eurasian Customs Union, covering oil and gas infrastructure.
Get professional advice on choosing, installing, and maintaining induction and permanent magnet synchronous motors in challenging industrial locations.
Asynchronous induction motors rely on rotor slip relative to the stator field to induce current in the squirrel cage, providing robust, simple operation directly from utility lines. Synchronous motors (PMSM) use permanent magnets in the rotor to rotate in lockstep with the stator field. PMSMs offer higher efficiency (matching IE5 standards), increased power density, and better torque output at lower speeds, though they require a compatible variable speed drive (VSD) for operation.
The VPI process extracts air and moisture from the stator slot windings and impregnates them with solventless resin. This produces a solid, void-free winding assembly with excellent mechanical strength, high thermal transfer rate, and resistance to environmental moisture. This insulation prevents internal micro-arcs, protecting the motor against catastrophic winding failures in hazardous gas or dust environments.
Flameproof (Ex d) enclosures are designed to contain any internal explosion without allowing it to ignite the surrounding atmosphere. They are ideal for compact machinery where purge air is unavailable. Positive pressure (Ex p) systems maintain a constant overpressure of clean air or inert gas inside the motor frame, preventing explosive gases from entering. Ex p configuration is preferred for large high-voltage motors (like the YZYKS series) where designing a true flameproof frame is structurally impractical.
CE Certification indicates compliance with the EU's essential safety and environmental directives, including the Low Voltage Directive (2014/35/EU), Electromagnetic Compatibility Directive (2014/30/EU), and the Eco-design Regulation (EU) 2019/1781. It is a mandatory legal requirement for selling or operating rotating machinery within the European Economic Area.
TESTSAFE is the leading safety certification authority for mining and explosive atmospheres in Australia and the Southern Hemisphere. Acquiring TESTSAFE compliance ensures that Nanyang/Morley flameproof mining motors meet local underground occupational health and safety rules, permitting immediate installation on heavy mining rigs without extra local testing.
Standard motors running on VFDs require specialized insulation to handle the voltage spikes produced by pulse-width modulation (PWM) controllers. Wolong's YBBP and YBBPX series use reinforced winding insulation, insulated non-drive end bearings, and grounding brushes to prevent electrical bearing damage and ensure long-term operation under variable speed loads.
Explore more specialized motor designs, high-efficiency fan drives, brushless excitation motors, and high-voltage drive systems.
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