Explore our certified high-performance AC electric motor configurations
Shaanxi Nanfang Motor Technology Co., Ltd. is the authorized distributor of Wolong Electric Drive Group Co., Ltd. (founded in 1984 and listed on the Shanghai Stock Exchange in 2002 under ticker code SH600580).
With over 35 years of engineering growth, Wolong operates a premium manufacturing and research ecosystem consisting of 3 major manufacturing bases, 39 advanced global factories, and 3 internationally recognized R&D centers. As a dominant global drive force, Wolong is committed to a unified international brand strategy, providing robust research, technological process supremacy, and custom OEM manufacturing of 3 Phase AC induction motors for critical mission environments worldwide.
Combining European engineering excellence, American innovation, and China's high-efficiency industrial supply chains.
Acquired in 2011, Austria-based ATB is one of Europe's top three motor manufacturers. Known for high-specification equipment, ATB incorporates century-old brands such as Morley (underground mining motors) and Laurence Scott (nuclear power, low starting current naval drives).
A benchmark for electric motor technologies for over 100 years. Brook Crompton is highly esteemed for pioneering premium-efficiency motors (Brook "W" and "10" series) optimized for harsh and hazardous industrial processing environments.
Established in Germany in 1882, Schorch sets world-class standards for customized high-power heavy industry driving systems. Widely specified across global chemical processing, oil & gas extraction, and critical municipal pipelines.
Collaborating with Wolong since 1999, OLI commands the largest global market share in rotary electric vibrators and high-reliability explosion-proof vibration sensors for the dry bulk processing sector.
Integrated into Wolong in 2015, CNE is China's largest specialized R&D base for explosion-proof motors. The Nanyang line provides rugged ATEX, IECEx, and EAC certified motors designed for coal extraction, petrochemical plants, and marine shipping.
In 2018, GE's commercial and industrial motor division partnered closely with Wolong. Wolong utilizes GE's deep engineering heritage to manufacture large-scale heavy industrial systems for chemical processing, paper mills, and material transport.
Wolong has systematically built a certified supply chain system, enabling OEM motors to gain fast custom clearance and meet rigorous safety specifications across Europe, the Americas, Australia, and Africa:
A microscopic view of our heavy duty 3 Phase Induction Motor structure, designed to withstand extreme voltage fluctuations, aggressive mechanical loads, and thermal shock.
The rotor features a rugged squirrel cage design, primarily employing cast aluminum slots. Produced using centrifugal aluminum casting or precision high-pressure die-casting techniques, molten pure aluminum is injected into the high-grade silicon steel lamination stack. This creates a solid integrated unit of rotor bars and end rings, preventing voids and hot-spots.
For large-capacity high voltage applications (such as the YKK or YZYKS series), copper bar rotors are utilized. These feature custom induction-brazed joint structures on the end rings. High-speed rotors are equipped with structural shrink-fit non-magnetic retaining rings to resist centrifugal stress, ensuring G1.0/G2.5 balance levels.
The stator coil is built from double-glass-fiber insulated enameled wire, reinforced with layers of polyester film. We use low-powder or medium-powder mica tape with high mica content to handle intense electrical and thermal stresses.
The entire core and coil assembly undergoes a state-of-the-art VPI (Vacuum Pressure Impregnation) process. This extracts air and moisture from the slots, filling voids with a high-grade solventless epoxy resin. The result is a solid stator core with outstanding dielectric strength, thermal dissipation, mechanical rigidity, and moisture resistance, easily achieving Class F (155°C) or Class H (180°C) thermal ratings.
The structural design is optimized using multi-physics simulations on a unified digital CAD/CAE platform. This simulates electromagnetic forces, structural stress, and cooling fluid flow.
Constructed from high-tensile strength gray cast iron (standard) or welded steel plates (for high-voltage/special frames), the motor frame has thick cooling ribs to maximize surface area. The design ensures high torsional rigidity, low vibration levels under transient torque loads, and a large thermal safety margin.
The low-noise ventilation system consists of an aerodynamic fan, air guide shroud, mesh protection guard, and sound-absorbing silencer plates. Made from lightweight materials, the fan minimizes rotational inertia.
The side-entry air intake profile prevents obstacles behind the motor from blocking airflow. This layout dampens noise caused by internal turbulence, and integrated sound-absorbing materials further reduce high-frequency fan noise. The fan cover meets IP22 protection guidelines to prevent accidental contact with moving parts.
Combining complete industrial clusters, advanced automation, and efficient logistics networks to deliver global quality at competitive scale.
China is home to the world's most integrated electrical steel and refined copper processing clusters. Our close proximity to raw material hubs ensures access to high-grade cold-rolled non-oriented silicon steel (CRNGO) and ultra-pure enameled copper wires, keeping material quality high and lead times short.
Our manufacturing lines feature automated high-speed lamination stamping, robotic stator winding, and automatic VPI treatment. This high level of automation reduces human error, guarantees winding consistency, and provides the economies of scale needed for large OEM orders.
With an experienced local engineering network, we can quickly customize shaft designs, terminal boxes, mounting dimensions, and environmental protection levels. We can produce custom prototypes within weeks, accelerating your project development timelines.
| Motor Series | Voltage Ranges | Efficiency Class | Hazardous Protection | Key Applications |
|---|---|---|---|---|
| WE3 / YE3 / YE5 | 220V, 380V, 400V, 415V, 660V | IE3 / IE4 / IE5 (High/Premium) | General Industry (IP55) | Fans, Water Pumps, Conveyors |
| YZYKS / YKK | 3kV, 6kV, 10kV, 11kV | Custom High Efficiency | Ex d / Ex de Positive Pressure | Heavy Duty Compressors, Mine Ventilators |
| YBX4 / YFB3 | 380V, 660V, 1140V | IE4 Premium Efficiency | Dust & Gas Explosion Proof | Chemical Processors, Grain Silos, Coal Mines |
| YVF / BPY-S30 | Variable Low/High Voltage | VFD Speed Regulated | Wide Variable Frequency range | Industrial automation, Mining shears |
Providing custom motor designs engineered for efficiency and safety in harsh processing environments.
Flameproof enclosures, non-sparking terminal designs, and positive-pressure purge systems block flammable vapors. Certified under ATEX, IECEx, and EAC, these motors reliably run critical pumps, refining agitators, and high-pressure compressors.
Custom-engineered Morley coal shearer cutting motors and high-voltage ventilation fan drives are built to resist dust accumulation, humidity, and intense vibration, ensuring maximum safety and uptime in mining environments.
YKK and YZYKS high-voltage positive-pressure motors supply steady torque to high-volume water pump systems, boiler feed pumps, and cooling tower fans. They feature low starting currents, high insulation reliability, and quiet operation.
A structured approach to custom motor configurations, quality control, and global logistics support.
We customize every phase of the motor design to integrate seamlessly with your industrial machinery:
Get answers to common technical, engineering, and procurement questions about induction motors.
3 Phase AC induction motors provide a constant, rotating magnetic field that enables self-starting without auxiliary starting windings or capacitors. They offer higher power density, better efficiency (up to IE5 levels), lower vibration levels, and superior reliability in continuous-duty heavy industrial environments.
VPI replaces the air and moisture inside the stator slots with a solid, high-dielectric resin. This increases structural rigidity, prevents enameled wire insulation rubbing, improves thermal dissipation from the copper coils to the frame, and seals the windings against humidity, dust, and aggressive chemical vapors.
High-frequency voltage harmonics from VFDs can induce electrical currents along the rotor shaft, which can discharge through the bearings and cause pitting and premature failure. To prevent this, we install insulated bearings on the non-drive end, ground brush systems on the drive end, or use ceramic hybrid bearings.
ATEX: A European Union directive mandatory for equipment used in explosive atmospheres within Europe. IECEx: An international certification scheme designed to harmonize standards globally. EAC Ex: Mandatory safety standard required for hazardous area equipment imported into the Eurasian Customs Union (Russia, Belarus, Kazakhstan).
Class H enameled wire features an extra polyimide overlay that allows it to operate safely at higher hot-spot temperatures (up to 180°C, compared to 155°C for Class F). Class H designs also require premium, high-temperature slot insulation liners, matching mica tape formulations, and modified impregnation resins to match the thermal rating.
Our low-noise fan hoods utilize optimized internal air guide cylinders to streamline airflow and reduce turbulence. The shroud incorporates sound-deadening liner materials, and the air intakes are positioned on the side to prevent noise from propagating directly backwards.
All custom motors undergo routine tests in our test bays, including winding resistance measurements, insulation resistance testing (megger test), no-load voltage and current measurements, open-circuit/short-circuit checks, dynamic balance checks, and vibration profiling. Type-test curves and temperature rise tests are also available on request.
Lead times depend on the motor frame size, voltage rating, and customization level. Standard low-voltage IE3/IE4 motors can ship in 4 to 6 weeks, while larger high-voltage motors (like the YKK series) or custom ATEX-certified systems require 8 to 12 weeks to complete precision winding, VPI treatment, test-bay validation, and international certification.
Premium induction drive systems engineered for hazardous, mining, and high-efficiency operations
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