The industrial landscape is undergoing a massive paradigm shift towards absolute energy efficiency, automation, and reliable performance in hazardous locations. AC Motors are the workhorses of modern infrastructure, driving pumps, compressors, fans, and heavy production machinery. As energy costs soar and global regulatory bodies enforce stricter carbon footprint rules, the demand for High-Efficiency (IE3, IE4, IE5) and intrinsically safe Explosion-Proof AC Motors has hit record highs.
OEM customization is no longer a luxury but an engineering necessity. System integrators, heavy industries, and infrastructure engineering contractors require motors tailored exactly to severe application criteria—ranging from sub-zero offshore oil rigs to high-temperature mining shafts. Finding a certified manufacturer that possesses both global scalability and deep technology IP is critical to minimizing Operational Expenditure (OPEX) and eliminating downtime risk.
Shaanxi Nanfang Motor Technology Co., Ltd & The Global Powerhouses under the Wolong Group
Shaanxi Nanfang Motor Technology Co., Ltd is the authorized distributor of Wolong. Wolong Electric Drive Group Co., Ltd was founded in 1984 and successfully listed in 2002 (code SH600580). After more than 30 years of development, Wolong has 3 manufacturing bases, 39 factories, and 3 R&D centers worldwide now. Wolong has always focused on the manufacture of motors and control systems, committed to a global brand strategy, making Wolong a leader in R&D, technology, process, manufacturing and sales in the global market.
By leveraging Wolong's unparalleled industrial infrastructure, Shaanxi Nanfang Motor Technology provides global industrial enterprises with elite engineering solutions, localized technical support, and streamlined logistics. From individual heavy duty motors to complex plant-wide motor driving configurations, we deliver efficiency and reliability.
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 has 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 become the actual controller of the ATB Group, and has became a world-renowned and high-strength global motor manufacturer. ATB motor group included the brand Morley in mining industry and Laurence Scott.
Both are excellent in the 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.
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. 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 across industries like oil & gas, chemicals, water supply, and tunneling.
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, leading the bulk handling market segment.
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. In 2018, General Electric (GE) commercial and industrial division joined the ranks of WOLONG, bolstering massive technical engineering capacity.
A closer look at how Wolong structures robust, high-performance OEM components
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.
Delivering peak efficiency across severe operating conditions worldwide
Complete compliance matrix for global markets. We supply different kinds of Ex certification, securing safe deployment of asynchronous motors in atmospheres with flammable gases, vapors, mist, and combustible dust environments.
Complete product offerings for energy optimization. We supply IE3, IE4, and the cutting-edge IE5 energy efficiency standards, including Permanent Magnet synchronous options that drastically lower plant footprint emissions.
Rich and diverse product lines covering low-voltage, medium-voltage, and high-voltage AC motors. Perfectly matching requirements of fans, water pumps, compressors, convey systems, and engineering machinery across hazardous zones.
As a globally esteemed manufacturer of motors and drive solutions, WOLONG boasts 39 manufacturing facilities and 4 research and development centers (R&D center) across various countries including China, Vietnam, the United Kingdom, Germany, Austria, Italy, Serbia, Mexico, India and so forth.
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, to name a few. WOLONG's mission is to deliver optimal solutions and services to our customers.
Adhering to comprehensive standards to penetrate strict global barriers
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.
Nemko/Atex
CSA
CE
CCC
SABS
TESTSAFE
- 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.
How Next-Generation Drive Systems align with Industry 4.0 and global decarbonization goals
The future of AC Motors goes hand-in-hand with remote diagnostic architectures. Next-generation systems integrate thermal, vibration, and current sensors directly onto the motor housing. Working closely with Variable Frequency Drives (VFDs), these motors transmit real-time telemetry back to an AI-driven monitoring software. By analyzing trends in bearing temperature or minor frequency deviations, plant operations teams can perform predictive maintenance, avoiding catastrophic breakdowns.
Wolong is currently developing advanced IoT-ready models, enabling heavy industries to continuously monitor low and high voltage systems via standard cloud platforms.
With the globally recognized transition toward the European Green Deal and similar international regulations, the minimum standard is climbing fast. Wolong has invested heavily in Permanent Magnet Asynchronous and Synchronous Motor lines to hit the demanding IE5 specifications. Compared to standard induction options, these PM motors minimize stator copper losses and eliminate rotor electrical losses completely, ensuring unparalleled efficiency even during partial-load conditions.
Deep Technical Answers on Industrial AC Motors, Customizations, and Safety Guidelines
NANFANG
