Explore our premium product portfolio designed for extreme operating conditions and high reliability.
Understanding grid compliance, thermodynamic tolerances, and efficiency regulations across global markets.
In global industrial systems, 50Hz 400V three-phase motors constitute the primary workhorse for distribution grids in Europe, the Middle East, Asia, Africa, and parts of South America. Operating under the IEC 60038 standard, these systems balance current density and insulation stress to achieve optimum efficiency. As heavy industries push toward decarbonization, transitioning to premium high-efficiency motors (IE3, IE4, and the latest IE5 PMAC designs) represents a crucial operational step.
As a global partner, Shaanxi Nanfang Motor Technology Co., Ltd. serves as the authorized distributor of Wolong Electric Drive Group Co., Ltd. (founded in 1984, listed on the Shanghai Stock Exchange in 2002 under code SH600580). With 3 global manufacturing bases, 39 advanced factories, and 3 global R&D centers, Shaanxi Nanfang Motor delivers robust, certified drive systems designed to withstand demanding high-stress conditions.
A global leading manufacturer delivering certified motors and drive control systems.
Shaanxi Nanfang Motor Technology Co., Ltd. provides direct access to Wolong's comprehensive manufacturing network. Wolong's product line covers high-voltage and low-voltage electric motors, traction motors, and drive controls. Over more than 30 years, Wolong has grown through technology acquisitions, bringing together specialized historic motor brands to serve critical industrial applications.
Production Lines
Exporting Countries
National Patents
Mega Projects Completed
How Wolong integrated premier global motor brands to build an authoritative supply chain.
In 2011, Wolong acquired 97.94% of the Austrian ATB Group, positioning itself as a major European manufacturer. ATB includes Morley, which brings nearly 130 years of history in underground coal mining equipment engineering, and Laurence Scott, renowned for low-starting-current motors for nuclear power and naval applications.
Wolong integrated Brook Crompton Motors, an innovator in energy-efficient low, medium, and high-voltage AC motors. In the same period, Schorch joined the group, continuing a legacy of heavy-duty drive systems dating back to 1882 for petrochemical, maritime, and steel processing industries.
In 2015, China's largest explosion-proof motor scientific research and production base, Nanyang Explosion-Proof Group (CNE), joined Wolong. In 2018, Wolong acquired the commercial and industrial motor division of General Electric (GE), strengthening its capability to support major global infrastructure projects.
A detailed engineering analysis of stator, rotor, frame, and low-noise cooling systems.
Our rotors use dynamic centrifugal cast aluminum or precision die-casting techniques. Molten pure aluminum is poured into the rotor core slots to integrate the rotor bars and end rings, ensuring mechanical reliability and balanced torque properties. For larger capacity systems, copper bar rotors with TIG welding and heavy-duty retention rings are utilized to prevent thermal fatigue under high slip conditions.
The stator coil windings are constructed from premium polyester film combined with high-grade glass cloth and mica tape insulation. The entire assembly undergoes a Vacuum Pressure Impregnation (VPI) cycle. This process minimizes air voids, enhancing moisture resistance, mechanical rigidity, and thermal transfer properties to support long service lives in high-humidity and chemically aggressive environments.
Designed using multi-physics structural and fluid thermal analysis, the high-strength cast iron (or fabricated steel) frames feature optimized cooling fins. The frame provides robust mechanical rigidity, helping isolate vibration and absorb external loads to protect structural integrity during start-stop cycling.
The low-noise ventilation system integrates an aerodynamic fan, air guide cylinder, protective window, and silencer plate. Using sound-absorbing acoustic liners, the layout reduces noise propagation without restricting airflow. The system complies with IP22/IP55 safety standards to prevent environmental ingress and maintain safe operation.
Why procurement professionals rely on Shaanxi Nanfang Motor for project execution.
By keeping stator winding, precision machining, casting, and testing within a unified system, we manage lead times and control production costs.
We work with global design institutes to customize flange mounts, shafts, terminal boxes, and sensor configurations to integrate with your existing machinery.
Each unit undergoes type testing, including vibration checks, dielectric strength measurements, winding impedance tests, and full-load thermal runs.
Our drive units are certified for reliable operation in chemical, mining, and high-temperature environments.
Nemko / ATEX
CSA
CE
CCC
SABS / TestSafe
Reference values for standard low-voltage three-phase asynchronous motors.
| Motor Series | Efficiency Class | Power Range (kW) | Cooling Method | Protection Rating | Typical Applications |
|---|---|---|---|---|---|
| YBX4 Series | IE4 / Super High | 0.75 - 375 | IC411 (Self-Ventilated) | IP55 / IP56 | Chemical Processing, Oil & Gas |
| WEPM Series | IE4 / IE5 Permanent Magnet | 1.5 - 400 | IC416 (Forced Air) | IP55 | Compressors, HVAC, Conveyors |
| Y3 HV Series | High Efficiency | 160 - 2000 | IC611 / IC81W | IP54 / IP55 | Heavy Pumps, Power Generation |
| YFB3 Series | IE3 High Efficiency | 0.12 - 315 | IC411 | IP65 (Dust Ignition Proof) | Grain Handling, Coal Dust Zones |
How our motor technology integrates into demanding industrial processes.
Our ATEX/IECEx certified explosion-proof motors run continuously in gas Zone 1 and 2 environments, powering centrifugal pumps and vapor compressors.
Designed with input from our Morley mining motor heritage, these water-jacketed and flameproof motors drive shearers and armored face conveyors under high mechanical shock.
High-efficiency 400V motors drive high-volume water pumps and aeration blowers, helping municipal and industrial plants lower operating energy costs.
Key technological developments changing the landscape of industrial drive systems.
Energy consumption accounts for over 90% of a motor's lifecycle cost. Modern facilities are shifting from standard induction motors to Variable Frequency-driven Permanent Magnet Synchronous Motors (PMSM), which achieve IE5 efficiency levels. These motors maintain high efficiency even when operating at partial loads.
By using vibration, temperature, and magnetic flux sensors, operators can feed real-time performance data into SCADA platforms. This allows maintenance teams to identify bearing wear, stator insulation degradation, or shaft misalignment before an unexpected failure occurs.
Offshore oil platforms, chemical plants, and marine shipping systems require advanced coating systems. Double-chamber terminal boxes, rust-resistant epoxy paint systems, and IP66 sealing protect critical components from salt spray and chemical corrosion.
Expert engineering insights regarding 50Hz 400V motor design, operation, and selection.
Yes, in many cases. When moving from a 50Hz to a 60Hz grid, the ratio of voltage to frequency (V/Hz) must remain close to constant to prevent core saturation. The V/Hz ratio for 400V/50Hz is 8.0. For 460V/60Hz, it is 7.67, which is within an acceptable +/-5% range. Note that the motor will run approximately 20% faster, increasing fan load and power demand. Consult our technical support team to verify thermal performance before commissioning.
VPI utilizes a combination of vacuum pressure cycles to eliminate air pockets in the winding assembly, fully penetrating the stator core with high-grade varnish. This provides better mechanical bonding, higher dielectric strength, improved heat dissipation, and superior protection against moisture and corrosive chemicals compared to traditional dipping.
Ex d (Flameproof) frames are designed to contain an internal explosion and prevent it from igniting gases in the surrounding atmosphere. Ex e (Increased Safety) designs use tighter tolerances and electrical parameters to prevent sparks, arcs, or hot surfaces from forming. Ex n (Non-Sparking) is designed for Zone 2 applications, ensuring the motor will not ignite surrounding gases during normal, non-fault operations.
Traditional induction motors require an excitation current to create a magnetic field in the rotor, which generates heat and causes I²R energy losses. PMSMs embed permanent magnets directly in the rotor, eliminating rotor copper losses and maintaining high efficiency across a wide range of speeds and loads.
For industrial applications, we typically install three PT100 platinum RTDs or PTC thermistors in the stator windings to monitor thermal conditions. For heavy-duty machinery or high-voltage installations, bearing temperature sensors (PT100) are also included to detect potential bearing failures early.
Explore specialized motors designed for severe mining, positive pressure, and variable frequency environments.
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