Explore our premium-class explosion-proof, multi-speed asynchronous motors engineered for high-stress underground shearers and coal conveyor networks.
Analyzing the critical transitions, regulatory constraints, and motor-driven machinery trends in modern North American mining operations.
The United States mining sector is undergoing a massive transformation driven by decarbonization goals, strict safety guidelines under the Mine Safety and Health Administration (MSHA), and the rapid expansion of domestic critical mineral production. Modern mining projects—from the copper mines of Arizona and Utah to the precious metal operations in Nevada and Appalachian underground coal projects—demand robust and energy-efficient motor systems to ensure operational uptime under the most extreme conditions.
Explosion-proof motors serve as the primary power generators for mechanical operations in underground coal mines, where methane gas and combustible dust pose persistent explosion hazards. In these highly volatile environments, equipment must comply with strict NFPA 70 Class I Division 1 / Class II Division 1 standards, or international equivalents like ATEX and IECEx. High-capacity mining operations, such as armored face conveyors (AFCs), heavy-duty rock crushers, ventilation systems, and slurry pumps, require motors that deliver high starting torque, thermal resilience, and variable frequency capability.
US underground coal mines rely on machinery that guarantees gas-tight containment. Explosion-proof designs are vital for conveyor drives, continuous miners, and shuttle cars operating near explosive faces.
Additionally, the US mining supply chain faces critical challenges: aging machinery, the high cost of maintenance, and the need to upgrade to high-efficiency ratings (IE3 and IE4/IE5 standard) to cut down operating costs and carbon emissions. Mining companies are transitioning to VFD-driven synchronous permanent magnet motors that minimize energy loss and provide precision speed control for variable loads.
WOLONG Nanyang ATB brand is ideally positioned to meet these demands by providing global standard certifications, low starting currents, robust cast-iron frames, and tailored technological packages that integrate with existing US mine power setups.
Decarbonizing heavy hauling routes requires motors capable of precise thermal limits and variable speed range, lowering mechanical wear on gears and head-shafts.
A leading authorized distributor of Wolong Electric Drive Group, connecting state-of-the-art motor engineering with global heavy industries.
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 on the Shanghai Stock Exchange in 2002 (code SH600580). After more than 30 years of rapid, steady development, Wolong has established 3 manufacturing bases, 39 factories, and 3 global R&D centers worldwide.
Wolong focuses on the manufacture of electric motors and electronic control systems, implementing a robust global brand strategy. This long-term expansion has positioned Wolong as an industry leader in R&D, structural design, advanced metallurgy, casting, and sales across global markets, catering to the oil and gas, mining, marine, and power generation industries.
Our engineering support team is standing by to configure your heavy-duty industrial electric motor parameters.
Get Engineered Quote NowCombining world-class engineering legacies to deliver robust drive solutions across multiple continents.
Accumulated with abundant assets and brilliant experience in manufacturing, WOLONG started to reach for higher attempts. To be the leading manufacturer of AC motors & drives worldwide, WOLONG strove to acquire overseas groups.
In 2011, the WOLONG company acquired strong technical and technological support. 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 establishing itself as a world-renowned, high-strength global motor manufacturer. The ATB motor group included the renowned brand Morley in the mining industry and Laurence Scott.
Both brands are pioneers in electric 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, serving as a synonym for quality, power, and reliability. It provides the global market with high-specification, high-performance, high-quality electrical equipment for mine operations. Laurence Scott, the pioneering company that supplied motors for British nuclear power plants, is renowned for manufacturing equipment with low starting currents and equipping naval vessels with generators. Following its acquisition by WOLONG, the company was honored with the Queen's Award for three consecutive years.
Furthermore, Brook Crompton Motors joined the WOLONG group. 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 share 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, realizing a powerful strategic cooperation. 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 heavy-duty 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 its abundant experience in electric motor manufacturing, GE provides massive technological and distribution 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 detailed inspection of the design parameters that guarantee safety, structural reliability, and long life cycles under dynamic loading conditions.
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 reliability and endow the motor with outstanding torque properties. For larger capacity motors, copper bar rotors are employed, benefiting from dependable bar securing and end ring welding procedures. Additionally, the protective ring design of high-speed motors 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. 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, lowering the overall motor noise. Additionally, the fan cover is rated IP22, ensuring that hands cannot come into contact with the fan.
WOLONG electric motors conform to strict industrial standards, ensuring smooth site approval and high operational reliability worldwide.
Adhering to a comprehensive marketing strategy for the electric motor and the entire industry chain, WOLONG has secured major global product certifications, enabling seamless penetration into the most demanding international markets.
| Certificate Type | Target Region / Industry | Safety Standards Met |
|---|---|---|
| UL / CSA | United States & Canada | Class I & II Div 1 & 2 Explosion Proof |
| ATEX / IECEx | European Union & International | Ex d, Ex de, Ex e, Ex nA - Zone 1 & 2 |
| TESTSAFE | Australia & Southern Hemisphere | Underground Coal Mining Machinery Compliance |
| EAC / GOST | Eurasian Economic Union | Explosion Proof Mine Safety (EAC Ex) |
Providing high-output manufacturing capacity, fast turnaround cycles, and local technical engineering backup.
Navigating import complexities and lead times is a critical factor for industrial distributors and engineering procurement, construction, and management (EPCM) firms in North America. WOLONG group leverages its extensive manufacturing capability across China, Europe, and Vietnam to guarantee unmatched supply chain resilience.
By purchasing from an authorized distributor like Shaanxi Nanfang Motor, clients gain access to:
Browse our selection of low, medium, and high voltage explosion-proof induction and permanent magnet synchronous motors.
Clear explanations regarding safety parameters, frame design, efficiency ratings, and procurement inquiries for mining projects.
In North America, hazardous locations are classified under the Division system (e.g., Class I, Division 1 covers areas where flammable gases are continuously or periodically present). ATEX/IECEx uses the Zone system (Zone 1 covers areas where explosive mixtures are likely to occur in normal operation). Both designs require robust flameproof enclosurings (Ex d) capable of containing internal explosions without igniting gases in the surrounding atmosphere.
VPI ensures that the stator windings are fully saturated with solventless epoxy resin, eliminating voids and air pockets. This process delivers superior electrical performance, enhanced mechanical strength against vibration, moisture resistance in wet underground environments, and high thermal stability (conforming to Class H or F limits).
Yes. Motors like the YBBP series utilize water cooling to maintain safe operating temperatures. Water cooling is highly effective in underground operations where space is limited and ventilation air is restricted, preventing heat dissipation from raising the ambient mine air temperature.
WOLONG conducts rigorous mechanical and electrical type testing to comply with UL and CSA standards, including NEMA efficiency validations. Our motors carry international certifications (ATEX, IECEx, CSA, Nemko), making them suitable for North American heavy industrial environments.
Get professional engineering assistance for customized shafts, mounting flanges, voltage configurations, or hazardous location classifications.
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