Select premium drive systems engineered for hazardous environments and heavy-duty load characteristics.
In modern global extraction operations, raw processing lines demand unparalleled torque density and strict explosion protection levels. Global mine sites, ranging from the deep gold basins of South Africa to the massive oil sand projects in Canada and remote copper operations in Australia, are moving away from traditional mechanical drives to advanced electrical systems. These are collectively known as M Mining Line Motors. High-performance, high-voltage motors are the standard choices to run high-capacity conveyor belts, heavy-duty pumps, grinding mills, and ventilation networks.
In the context of the energy transition, efficiency compliance is no longer optional. Standards such as European IEC IE4/IE5 regulations and NEMA Premium Efficiency in the US demand the integration of variable-frequency drives (VFD) and permanent magnet technology. Mining operators require motors that can withstand dynamic voltage spikes, micro-vibrations, and highly abrasive particulate loads without unplanned downtime. As a result, the demand for certified, heavy-duty explosion-proof motors continues to increase.
Building a world-class manufacturing supply chain for industrial motor drives.
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). Over the past three decades, Wolong has grown to establish 3 manufacturing bases, 39 factories, and 3 R&D centers worldwide. With a core focus on the manufacture of electric motors and control systems, Wolong’s global brand strategy positions the group as a leading entity in research, development, process technology, manufacturing, and international sales.
Through strategic global acquisitions, Wolong has integrated several of the industry's most respected century-old motor brands:
In 2011, Wolong acquired a 97.94% stake in the Austrian ATB Group, which includes the Morley brand—a historic name in underground coal mining with over 130 years of history—and Laurence Scott, renowned for low starting current systems supplied to nuclear and naval power sectors.
Brook Crompton brings over a century of motor design expertise, offering efficient low, medium, and high-voltage AC motors (such as the premium "W" and "10" series). Schorch, established in 1882, provides robust driving systems for oil, gas, chemical processing, water management, and shipbuilding.
In 2015, China's largest explosion-proof motor base, Nanyang Explosion-Proof Group (CNE), joined Wolong. In 2018, the industrial motor business of General Electric (GE) was integrated, bringing extensive experience in heavy commercial electrical equipment to the group.
Why sourcing from our advanced manufacturing bases offers high reliability and competitive costs.
Our manufacturing facilities leverage integrated supply chains to optimize production. Key components, such as low-loss electrical steel lamination sheets and copper winding wires, are sourced and processed using advanced automation. Standardizing these processes helps maintain consistent quality and reduces delivery times for high-volume orders.
Additionally, our production lines utilize modern manufacturing technologies, including automated VPI (Vacuum Pressure Impregnation) systems and robotic rotor welding. These methods help ensure consistent insulation quality, structural stability, and reliable performance in demanding industrial applications.
By combining European design engineering (from ATB, Morley, and Schorch) with China's scale of production, we offer high-voltage mining motors that meet international safety standards (such as ATEX, IECEx, and CSA) at competitive cost-to-performance ratios.
With multiple manufacturing bases, we can manage high-volume orders and provide custom design variations to meet specific operational requirements.
Tested and approved for operation in hazardous, explosive, and harsh environments.
To meet the safety requirements of different countries, Wolong has secured several product certifications for international markets:
As an ISO 9001 certified manufacturer of explosion-proof motors, Wolong maintains documented quality control systems. This certification helps ensure reliability in production, design, and service, helping to address international trade requirements.
For the North American market, Wolong's motors are designed to meet NEMA mechanical performance specifications. Testing covers efficiency, insulation resistance, starting current, torque limits, vibration levels, and noise emissions. We maintain UL and CSA certifications for our low-voltage motor ranges.
For hazardous operations, we provide IECEx and ATEX certified low and high-voltage motors. Furthermore, our TESTSAFE certification—obtained via Australia’s leading coal product certification body—enables our mining motors to be used in Australian coal mining applications and other international markets.
IECEx / ATEX Certificate
Explosion Safety Certificate
EAC Russian GOST Certificate
ATEX Quality System Certificate
CE Compliance Certificate
TESTSAFE Mining Safety Approval
Nemko ATEX Certificate
High reliability through engineered stator, rotor, frame, and cooling systems.
The rotor features a squirrel cage design. Cast aluminum rotors are produced using centrifugal casting or die-casting techniques, pouring molten pure aluminum into the slots of the rotor core to form a single-piece construction that integrates the rotor bars and end rings. The structural integrity and manufacturing process of cast aluminum rotors support the motor's mechanical stability and torque characteristics.
For larger capacity motors, copper bar rotors are used. These feature copper bar securing and end-ring welding procedures. Additionally, the protective ring design of high-speed motors supports the stable operation of the copper bar rotor under variable speeds and cyclic loads.
The stator coil is crafted from polyester film and reinforced with glass cloth, using low-powder mica tape with a high mica content or medium-powdered mica tape. Following the VPI (Vacuum Pressure Impregnation) process, the coils are cured to form the final insulation system.
The winding and insulation are designed to provide electrical insulation performance, mechanical strength, moisture resistance, and thermal stability in hot, damp, and dust-prone mining environments.
The motor frame is designed using structural and fluid multi-physics simulation platforms. This simulation helps maintain structural rigidity and design margins.
Constructed from high-strength cast iron (or structural steel options), the frame features high structural redundancy, heat dissipation characteristics, and vibration isolation margins. It is built to withstand mechanical shocks, reduce resonance, and manage operating temperatures under load.
The cooling system includes a fan cover body, an air guide cylinder, a protective window, and a silencer plate. The design aims to balance heat dissipation and noise control.
An air inlet is positioned on the side to help bypass obstacles behind the motor, reducing ventilation resistance and aerodynamic noise. The system uses sound-absorbing materials to damp high-frequency wind noise. The fan cover is rated IP22, preventing accidental contact with the rotating fan blades.
Targeted motor designs engineered for specific heavy industrial environments.
Underground environments involve methane gas and abrasive coal dust. Our flameproof conveyor motors (such as the YBS and YBSS series) feature explosion-proof enclosures designed to contain internal explosions, preventing the ignition of external gas mixtures.
Tunnel boring machines (TBMs) demand compact drive units that can handle high torque at low speeds. Our YBU, YBUS, and YBUD series flameproof motors are built to endure high structural stress and cyclic overload profiles.
High-head mine dewatering requires reliable operation. The YBRB water pump series provides continuous service under varying load conditions, protected by IP55/IP66 enclosure ratings to prevent water ingress.
Developing drive systems to meet rising environmental and automation goals.
The industry is transitioning toward Permanent Magnet Synchronous Motors (PMSM) for applications requiring high torque at low speeds. These systems eliminate rotor copper losses, providing high efficiency across a broad load range. Our WEPM series is designed for variable-frequency operation, helping operators reduce energy costs.
Modern mine management integrates IoT sensors directly onto high-voltage motors. By monitoring vibration, stator winding temperatures, and bearing wear in real time, operators can schedule maintenance based on actual condition rather than fixed intervals, helping to prevent unplanned downtime.
Technical answers for design engineers and procurement officers.
Ex-proof variable frequency, permanent magnet, and flameproof series for mining lines.
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