Engineered to deliver exceptional torque characteristics, robust mechanical efficiency, and unmatched reliability across global industrial sectors.
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 more than three decades of sustained growth, Wolong has established a commanding global footprint, operating 3 major manufacturing bases, 39 state-of-the-art factories, and 3 global research and development centers.
By executing an integrated global brand strategy, Wolong has solidified its status as an international leader in R&D, structural engineering, advanced manufacturing processes, and global sales channels. Shaanxi Nanfang Motor bridges this massive industrial capability directly to your supply chain, delivering tailored solutions for heavy industry sectors.
Through strategic international acquisitions, Wolong has integrated a century of motor design and manufacturing expertise from the world's most prestigious electric motor brands.
Acquired in 2011. ATB, a leading European manufacturer, provides world-class electrical technology. Sub-brand Morley brings nearly 130 years of underground coal mining expertise, making it a benchmark for heavy-duty flameproof mine machinery.
Laurence Scott is globally recognized for low starting current configurations and nuclear facility drive systems. Schorch, established in Germany in 1882, designs industrial drives for petrochemical, tunnel ventilation, and marine industries.
A pioneer with over a century of development history. Brook Crompton is famous for high-reliability low, medium, and high-voltage AC motors, including premium W and 10 series motors, and advanced adjustable speed drive packages.
Includes OLI, a global leader in vibration motors; Nanyang Explosion Group (CNE), China's premier explosion-proof research and manufacturing base; and GE Industrial Motors (acquired in 2018), bringing extensive commercial scale and engineering expertise.
Wolong's growth timeline represents a legacy of global technology integration. In 2011, the group successfully acquired 97.94% of the Austrian ATB Group, absorbing decades of premium European electric drive manufacturing technology. This acquisition brought the prestigious Morley mining motor brand and Laurence Scott, a leading supplier of low starting current drives for critical nuclear applications, into the group.
In subsequent years, the integration of Brook Crompton, Schorch, OLI, and China's largest explosion-proof motor scientific base (Nanyang Explosion-proof Group Co., Ltd.) solidified Wolong's global reach. In 2018, GE Industrial Motors joined Wolong, adding GE's manufacturing experience to the group's R&D capabilities. Today, Wolong stands as a global pioneer, delivering reliable, efficient electric motor manufacturing and engineering solutions worldwide.
A detailed look at the core design features that allow our 3-phase compressor motors to deliver high performance in extreme conditions.
Our rotors feature a robust squirrel-cage design, utilizing high-grade cast aluminum. These rotors are manufactured using centrifugal casting or advanced die-casting techniques, where molten pure aluminum is poured directly into the rotor core slots. This creates a one-piece construction integrating the rotor bars and end rings, ensuring excellent structural integrity, uniform density, and reliable torque properties.
For high-capacity or variable-frequency motors, copper-bar rotors are utilized. These feature secure bar configurations and end-ring welding processes, combined with specialized retaining rings to ensure stable, reliable operation at high speeds.
The stator coil windings are wrapped in polyester film and glass-cloth-reinforced mica tapes (low or medium powder formulations with high mica content) to deliver superior dielectric strength. The wound stator undergoes a Vacuum Pressure Impregnation (VPI) cycle, curing into a dense, solid structure.
This VPI system eliminates microscopic air voids in the windings, protecting the motor against moisture, chemical ingress, mechanical vibration, and thermal stress. This design ensures safe operation in high-humidity and hazardous industrial environments.
Our motor frames are engineered using multi-physics structural and fluid dynamics simulation software to optimize heat dissipation and mechanical strength. Constructed from premium cast iron or fabricated steel, the frames feature high structural margins and thermal dissipation fins.
The design minimizes resonance and vibration, reducing mechanical wear on the bearings and extending operating life. This robust construction protects the motor's internal components from environmental impacts and physical shock.
Our low-noise cooling fan system consists of a fan cover, an air guide cylinder, a protective screen, and integrated silencer plates. The side-entry air inlet design optimizes airflow path changes, reducing aerodynamic drag and minimizing noise levels.
Sound-damping materials inside the hood absorb high-frequency noise from the fan blades. The system holds an IP22 rating, preventing direct contact with the fan blades for enhanced operator safety without compromising cooling airflow.
Developing next-generation three-phase drive systems with a focus on premium efficiency, digital integration, and sustainability.
As global regulations tighten, we are shifting our product lines to meet IE5 efficiency standards. Utilizing advanced permanent magnet technologies and optimized rotor slot geometry, these motors minimize winding losses, reducing operational carbon footprint and lifecycle energy costs for heavy industries.
Our future motors integrate temperature, vibration, and magnetic flux sensors directly into the stator core and bearing housings. These sensors interface with cloud-based diagnostic platforms to enable predictive maintenance, helping plant managers prevent unplanned downtime.
We are advancing the development of Synchronous Reluctance Motors (SynRM) for compressor systems. SynRM designs operate without rare-earth magnets, offering high dynamic responsiveness and reliability in high-temperature environments, while reducing dependency on critical raw materials.
Providing reliable performance and high efficiency across oil and gas, petrochemicals, mining, power generation, and manufacturing fields.
In refineries and chemical plants, volatile gases demand reliable explosion-proof performance. Our YBX5, YBXKK, and YB3 series motors are built to withstand corrosive atmospheres and explosive mixtures. They provide the high startup torque needed for gas compressors, chemical pumps, and pipeline transmission systems, ensuring compliance with Zone 1 and Zone 2 safety standards.
Featuring dual-chamber terminal box separations and anti-corrosive epoxy coatings, these motors operate reliably in aggressive chemical environments and extreme temperatures.
For underground coal mines and marine applications, equipment must handle extreme dust, moisture, and mechanical shock. Our explosion-proof variable frequency motors, backed by Morley's mining design experience and Laurence Scott's low starting current capabilities, deliver high reliability for ventilation systems, compressors, and slurry handling pumps.
These systems feature robust cast-iron housings, IP66 enclosure protection, and high vibration tolerance to resist mechanical wear in underground mining and marine environments.
Wolong motors comply with international testing regimes, helping customers meet local regulatory requirements and simplify importing processes.
Our production facilities maintain ISO 9001 registration, ensuring consistent assembly processes and traceability. We conduct rigorous performance testing, including efficiency verification, insulation resistance testing, starting torque verification, and vibration analysis, ensuring full compliance with both NEMA and IEC design standards.
For hazardous locations, our motors are fully certified under the European ATEX directive and the international IECEx system. The Testsafe certification allows our explosion-proof mining motors to enter the Australian coal market, helping global operators meet strict local safety standards.
Wolong combines digital manufacturing processes with global distribution to ensure consistent quality and reliable delivery timelines.
Our production facilities employ robotic winding systems and computer-controlled VPI chambers. Automated resin viscosity and vacuum level monitoring ensure consistent stator insulation, reducing coil insulation failures and extending motor service life.
Every rotor assembly undergoes automated double-plane dynamic balancing testing to minimize mechanical vibration. High-speed rotors receive additional validation testing, reducing bearing load and wear under high-speed operation.
Our testing facilities validate motor performance under full-load, temperature-rise, and transient overload conditions. Dynamometers up to 10MW allow us to verify efficiency, power factor, and safety parameters prior to shipment.
Operating 39 manufacturing facilities globally, Wolong maintains robust supply chains for critical raw materials, including electrical steel and high-purity copper. This diversified manufacturing network helps protect our delivery timelines from local logistics issues or material shortages. Shaanxi Nanfang Motor works closely with our logistics partners to coordinate ocean and rail freight, ensuring your projects stay on schedule.
Guidance for procurement managers on selecting and specifying three-phase compressor motors for heavy industrial installations.
Ensure compliance with local voltage grid specifications (e.g., 380V/660V/1140V or 4160V for high-voltage installations). For systems sensitive to voltage drop, specify low starting current configurations (such as those developed by Laurence Scott) or integrate Variable Frequency Drives (VFDs) to manage electrical inrush.
Identify the specific gas groups and temperature class requirements (e.g., Class I, Div 1/2, or Zone 1/2, Gas Groups IIB/IIC, Temp Class T4). Ensure the selected motor holds the appropriate ATEX, IECEx, or local certifications to streamline regulatory approvals.
Confirm shaft configurations, mounting styles (IM B3, B35, etc.), and bearing protection. For offshore or marine environments, specify corrosion-resistant C5-M marine coatings, IP65/IP66 enclosure ratings, and space heaters to prevent moisture condensation during shut-down periods.
Technical answers to common questions regarding our three-phase industrial compressor motors.
The water-cooled design provides efficient heat removal, allowing the motor to operate at lower internal temperatures. This is particularly beneficial in high-ambient-temperature environments or confined spaces with limited airflow. It also helps reduce aerodynamic noise, making it suitable for noise-sensitive installations.
VPI replaces air pockets in the stator slots with solid insulating resin. This process increases the mechanical stability of the windings, enhances heat transfer out of the coils, and prevents the ingress of moisture and chemical contaminants, significantly reducing electrical insulation failure rates.
Yes. Our variable frequency series (such as YBBP, WEBP3, and YVF) are designed specifically for VFD operation. They feature insulated non-drive end bearings to prevent shaft currents and dynamic stator insulation systems to handle voltage spikes from high-carrier-frequency PWM inverter drives.
Laurence Scott brings extensive design expertise in low starting current motors. This technology allows large motors to start without causing significant voltage drops in the electrical grid, which is critical for sites with limited grid capacity or when operating on backup power systems.
Designed for heavy duty, dust-proof, and increased safety applications in nuclear, mining, and large-scale manufacturing facilities.
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