Explore our first tier of advanced, certified medium and high voltage AC induction and flameproof synchronous motors manufactured by Wolong's global bases. Engineered for high performance in hazardous areas and standard industrial settings.
In the context of the global energy transition and industrial upgrading, Medium Voltage (MV) electric motors serve as the indispensable heartbeat of heavy industries. These complex machinery units drive megawatt-level industrial infrastructure including centrifugal compressors, high-flow water pumps, critical ventilation systems, and continuous conveyor belts across petrochemical, oil, gas, mining, and power generation fields. China has established itself as the global epicenter for high-power drive technology, transitioning from high-volume production to deep technological integration, reliability engineering, and compliance with the most stringent global standards.
At the forefront of this industrial transition stands Shaanxi Nanfang Motor Technology Co., Ltd., the authorized distribution partner of Wolong Electric Drive Group Co., Ltd. Founded in 1984 and listed on the Shanghai Stock Exchange in 2002 (Stock Code: SH600580), Wolong has achieved massive global vertical integration. Backed by 3 massive manufacturing bases, 39 state-of-the-art factories, and 3 global R&D centers, Wolong serves as the world's preeminent manufacturer of motor and control systems.
Wolong's growth strategy relies heavily on global technological synthesis. Through strategic acquisitions of iconic European and American electric motor pioneers, Wolong has combined cost-effective Chinese supply chains with century-old precision engineering.
Wolong acquired 97.94% of the Austrian ATB Group, positioning itself as the key controller of one of Europe's top three motor manufacturers. This acquisition integrated the specialized brands Morley and Laurence Scott. Morley Motors, with nearly 130 years of history, remains a key name in underground coal mining drives. Laurence Scott stands out as a pioneer supplying low starting current motors for British nuclear power plants and generators for naval vessels.
Founded in 1882, Schorch represents premium German motor design. Specializing in customized drives for oil and gas, power generation, wastewater treatment, and high-performance tunnel ventilation, Schorch brings unmatched multi-physics system design and reliability to Wolong's portfolio.
Wolong acquired China's largest explosion-proof research and production base: Nanyang Explosion-Proof Group Co., Ltd. (CNE). This solidified Wolong's absolute dominance in explosion-proof safety designs (Ex d, Ex e, Ex n, Ex p) for domestic and global petroleum, coal, and nuclear facilities.
By acquiring GE's commercial and industrial motor division, Wolong gained massive intellectual property and design technology. This integration supports heavy industry customers in the Americas, conforming strictly to NEMA standards and IEEE specifications.
This strategy also includes the integration of Brook Crompton Motors (over a century of high-efficiency energy-saving designs, including premium W and 10 series) and OLI Brand (the global market leader in rotary vibration motors and Ex vibration sensors since 1999).
The mechanical reliability and efficiency of Wolong Medium Voltage Motors are direct products of advanced material science and strict manufacturing standards. Below is the structural breakdown of our standard MV motors.
Features squirrel cage design using centrifugal aluminum casting or die-casting techniques. This integrates rotor bars and end rings, delivering outstanding starting torque. For heavy applications, copper bar rotors with premium welding processes and protective retention rings prevent displacement under high rotational stresses.
Winding coils utilize premium polyester film backed with glass cloth and high mica content tapes. The completed stator is processed using Vacuum Pressure Impregnation (VPI). This guarantees high dielectric strength, protection against moisture ingress, chemical resistance, and thermal durability classified under Class F/H standards.
The motor frame is designed using digital multi-physics and structural-fluid co-simulation software. Cast in high-tensile gray iron or welded structural steel plates, these frames ensure exceptional mechanical rigidity, structural damping, and optimized thermal pathways, minimizing vibration and heat buildup.
Operating high-power medium voltage motors releases heat that requires robust thermal dissipation. Traditional fans run at high decibels, causing noise pollution. Wolong's optimized ventilation systems utilize:
Industrial motor deployment requires careful consideration of mechanical stresses and environmental constraints. Standard application profiles for Wolong's medium and high-voltage motors include:
Motors run in environments filled with explosive gases. Here, positive pressure flameproof (Ex p) and non-sparking (Ex n/Ex ec) designs prevent disaster, powering major pipeline compressors and water injection pumps.
Driving heavy conveyor belts and underground cutters requires mechanical durability. Morley-brand flameproof conveyor motors are built with heavy cast iron frames to survive severe impacts and high dust levels.
Designed with low starting currents, these motors run boiler feed pumps and cooling fans. Combined with Laurence Scott technologies, they meet strict regulatory and safety margins for nuclear power stations.
| Industry Segment | Critical Machinery | Recommended Motor Series | Safety / Certification Standard |
|---|---|---|---|
| Petroleum Refining | Pipeline Compressors & Process Pumps | YBBP, YZYKS Positive Pressure Series | ATEX / IECEx Zone 1 & 2 |
| Coal Mining | Heavy Conveyor Drives & Sheared Cutters | YBSD, YBSS Heavy Duty Series | MA / TestSafe Mine Ex d |
| Water Management | High-Volume Intake Water Pumps | YKK High Voltage Induction Motors | IP55 / IEC Standard |
| Heavy Metallurgy | Blast Furnace Blowers & Recirculating Fans | BPY-S30 Variable Frequency Series | CE / High-Efficiency VFD |
A visual look into Wolong's smart factories, automated winding systems, large-scale VPI autoclaves, and full load testing centers worldwide.
Industrial equipment must meet regional and industry-specific regulations to ensure site safety. Wolong group maintains a comprehensive portfolio of global certifications, allowing our products to integrate smoothly into international engineering projects.
Ensures high-level quality management across production, design, and assembly, serving as a baseline for reliable and repeatable motor manufacturing processes.
Confirms alignment with North American mechanical and electrical standards. Full load tests, insulation resistance checks, and starting performance verify safety for US and Canadian markets.
Mandatory certification for hazardous locations across Europe and globally. This certifies that flameproof (d), increased safety (e), non-sparking (n), and pressurized (p) structures will prevent ignition under fault conditions.
This certification allows Chinese-manufactured heavy coal mining motors to enter the Australian underground mining sector, providing high levels of explosive gas protection.
Industrial buyers focus on reducing Total Cost of Ownership (TCO) while maintaining reliability. Shaanxi Nanfang Motor and Wolong Group address these requirements through:
Our centralized research institutes in Shanghai, Europe, and Japan drive development in high-voltage variable frequency technologies. Our in-house research informs design updates for improved power density and efficiency.
By combining Nanyang's local experience with international brands like Brook Crompton, Morley, Laurence Scott, Schorch, and ATB, we offer tailored solutions for petrochemical, mining, and power applications.
With deep roots in the Nanyang Explosion-Proof base, we design and manufacture flameproof, positive pressure, and non-sparking motors. Our products carry international certifications like ATEX, IECEx, and CU-TR.
The medium voltage electric motor industry is evolving rapidly. We are incorporating smart technologies to meet modern industrial needs:
Procuring heavy-duty medium voltage motors involves rigorous technical verification and alignment with project engineering standards. Standard steps in our procurement process include:
We align key technical parameters including grid voltage (3kV to 11kV), starting torque behavior, load inertia curves, insulation requirements, and hazardous zone classifications.
Tests include temperature rise measurements, vibration checks, sound level verifications, and partial discharge testing of stator coils prior to delivery.
We pack motors using export-grade materials and implement preservation measures (such as shaft locking and anti-condensation heaters) to protect the equipment during transit and storage.
Find answers to common questions regarding medium-voltage electric motors, hazardous zone protection, and procurement procedures.
Explore our second tier of motor products, including dust-proof high voltage motors, high-efficiency low voltage models, variable speed options, and positive pressure models.
Standard construction diagrams, design archives, and system integrations for Wolong's industrial medium and high voltage motor series.
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