Explore our top-tier explosion-proof, low voltage, and high voltage asynchronous motors engineered to comply with strict international energy and safety directives.
Global industrial sectors are standing at a critical juncture: environmental regulations, combined with fluctuating energy tariffs, require a paradigm shift toward energy conservation. High-efficiency motors, specifically the IE4 super-premium efficiency class, are no longer a luxury—they are the benchmark for modern plant designs and retrofit projects. By mitigating electromagnetic, stator I2R, and rotor I2R losses, these motors guarantee maximum throughput while cutting greenhouse gas emissions.
As the authorized distributor of Wolong (Wolong Electric Drive Group Co., Ltd.), Shaanxi Nanfang Motor Technology Co., Ltd. provides direct access to one of the most comprehensive electric drive portfolios in the world. Wolong has established a global footprint that merges European heritage with high-capacity Chinese manufacturing. Our motors cater to all demanding applications, spanning oil and gas, heavy mining, municipal water distribution, maritime propulsion, and complex chemical processes.
Note on Market Dynamics: Electric motors account for roughly 70% of all electrical energy consumed by industry. Upgrading a single standard motor to an IE4 induction motor can reduce system energy consumption by up to 10%, translating into a total payback period of less than 18 months, depending on operational hours and localized utility costs.
Founded in 1984 and listed on the Shanghai Stock Exchange in 2002 (code SH600580), Wolong has executed a calculated global acquisition strategy. Today, it hosts 3 global manufacturing bases, 39 individual factories, and 3 state-of-the-art R&D centers. By integrating legendary international brands, Wolong has gained access to elite engineering archives, patent portfolios, and specialized application expertise:
In addition to these acquisitions, Wolong brought Nanyang Explosion Protection Group (CNE) into its ranks in 2015. CNE is China's largest scientific research and manufacturing hub for explosion-proof motors. To complete this industrial dominance, Wolong acquired the commercial and industrial motor division of General Electric (GE) in 2018. This acquisition provided robust support for heavy industries, including petrochemicals, metallurgy, mining, materials handling, and high-precision automation across North America and Europe.
The superior performance of an IE4 induction motor is determined by its design details. Standard designs often compromise on materials to reduce manufacturing costs; Wolong invests heavily in electromagnetic and mechanical optimization.
Our rotors feature specialized squirrel-cage designs. Standard applications utilize premium die-cast aluminum or centrifugal casting methods to eliminate internal porosity. For larger frame sizes and high-voltage configurations, we utilize premium copper bar rotors. The copper bars are securely fitted into the laminations and joined via advanced robotic end-ring welding procedures. High-speed rotors are equipped with structural shrink-fit retaining rings, ensuring high rotational stability and low vibration levels under centrifugal load.
The stator winding uses high-grade copper wire insulated with dual-layer polyester/glass-fabric wrap and low- or medium-powder mica tape. The entire assembly undergoes a rigorous Vacuum Pressure Impregnation (VPI) cycle with solventless epoxy resin. Once cured, this yields a solid stator block that is highly resistant to humidity, chemical contaminants, dust, and mechanical stress. The insulation is rated Class H, but operated under Class B temperature rise limitations to ensure long-term thermal reserves.
Designed using digital multi-physics simulation platforms, our heavy-duty cast iron frames (steel versions available for special configurations) exhibit exceptional torsional rigidity and vibration damping. By optimizing the cooling rib configuration and layout, the frame provides maximum surface area for thermal dissipation. This maintains low core operating temperatures, protecting the internal bearing lubricants and doubling insulation lifetimes.
Energy loss through fan friction and air shear is minimized via computer-optimized aerodynamic designs. The low-noise fan cover system features an integrated air guide cylinder, protective entry mesh, and silencer plating. The side air inlet prevents debris blockages while reducing acoustic emissions. The system meets IP22 finger safety standards and can be upgraded to higher IP ratings for extreme environments.
IE4 (Super Premium Efficiency) induction motors must comply with rigorous international regulations. Under the IEC 60034-30-1 standard, the allowable losses for IE4 are 15% lower than those of the premium IE3 standard. The table below illustrates standard efficiency requirements and mechanical design benchmarks for various power outputs at 4-Pole configurations:
| Motor Output (kW) | IE2 Efficiency (%) | IE3 Efficiency (%) | IE4 Efficiency (%) | Average Annual Energy Savings (kWh)* | CO2 Reduction (Tons/Year) |
|---|---|---|---|---|---|
| 11 kW | 89.8% | 91.4% | 92.6% | 1,150 kWh | 0.8 Tons |
| 37 kW | 92.7% | 93.9% | 94.8% | 2,800 kWh | 1.9 Tons |
| 75 kW | 94.0% | 95.0% | 95.6% | 3,750 kWh | 2.6 Tons |
| 110 kW | 94.5% | 95.4% | 96.0% | 5,500 kWh | 3.8 Tons |
| 250 kW | 95.1% | 96.0% | 96.5% | 9,800 kWh | 6.8 Tons |
*Calculated based on 6,000 operational hours per year at full load compared to standard IE2 motors.
To access global heavy industries, Wolong has secured the world's most critical certifications. This makes the procurement process simple and transparent for EPC contractors and international engineering buyers:
Nemko / ATEX
CSA
CE
CCC
SABS
TESTSAFE
Our international standards compliance covers multiple regions:
Every industry faces unique operating conditions. Standard off-the-shelf motors often fail due to extreme temperatures, chemical exposure, or electrical line fluctuations. Wolong's customized IE4 and explosion-proof motors are engineered for specific industrial sectors:
As standard induction motor designs reach their theoretical efficiency limits, Wolong is investing in future-ready technologies. We are actively developing IE5 Ultra-Premium Efficiency solutions, combining classic induction motor designs with new Permanent Magnet Synchronous Motor (PMSM) systems.
Our technological roadmap focuses on three main developments:
Answers to common technical and logistical questions from procurement managers, engineering consultants, and distributor networks.
Discover our range of heavy-duty, high voltage, and custom-engineered motors designed for specialized applications in severe operating conditions.
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