Engineered to deliver high torque density and maximum uptime in critical applications. Explore our premium range below.
Unlocking systemic efficiency and durability in the era of smart heavy industries.
The global heavy industrial infrastructure is undergoing a massive shift towards electrification, decarbonization, and digital integration. At the core of this transformation are AC High Voltage (HV) motors. Typically operating at voltage levels ranging from 3kV to 13.8kV, these heavy-duty machines are the driving force behind large-scale pumps, compressors, fans, blowers, and conveyors. As global energy prices fluctuate and carbon taxation policies tighten, industrial enterprises can no longer rely on legacy machinery. Selecting high-efficiency HV drive packages has transitioned from a routine engineering choice to a critical strategic business decision.
High voltage motor manufacturing requires highly sophisticated design practices to prevent thermal degradation, deal with intense mechanical stresses, and manage dynamic electric fields. Today, the world's leading energy, mining, petrochemical, and municipal water entities demand motors designed to minimize the Total Cost of Ownership (TCO). Our solutions combine localized European design heritage with optimized manufacturing pipelines, supplying heavy industries with highly dependable, custom-engineered high-voltage motor platforms.
Connecting international brands, cutting-edge technology institutes, and global manufacturing systems.
Shaanxi Nanfang Motor Technology Co., Ltd. is the authorized global distributor of Wolong (Wolong Electric Drive Group Co., Ltd., founded in 1984 and listed on the Shanghai Stock Exchange in 2002 under ticker SH600580). Over more than three decades of active R&D and strategic expansion, Wolong has established 3 world-class corporate manufacturing bases, 39 manufacturing plants, and 3 engineering R&D centers across the globe. By aligning with world-famous motor heritage brands, Wolong leads the development of global drive technologies.
A key aspect of Wolong's global leadership is its integration of international heritage brands, acquired systematically to drive collaborative manufacturing and engineering innovations:
| Brand Name | Integration Year | Industrial Core Expertise & Global Legacy |
|---|---|---|
| ATB Motor Group | 2011 | Based in Austria, ATB is one of the three major European motor manufacturers. The group includes specialized underground coal mining brand Morley (130-year legacy of mine motors) and Laurence Scott (historic supplier to British nuclear plants, warships, and low-starting-current naval applications). |
| Brook Crompton Motors | 2011+ | A veteran brand in electric motors with over a century of technology development. Brook Crompton is recognized for premium energy-efficient low, medium, and high voltage motor series ("W" and "10" series) optimized for harsh industrial installations. |
| Schorch Motors | 2011 | Established in Germany in 1882, Schorch sets the standard for high-output industrial drives. Its systems support heavy offshore gas extraction, water management, steel fabrication, testing tunnels, and chemical processing facilities. |
| OLI Vibration Motors | 1999 Joint Venture | Globally recognized for the MVE series industrial vibrators and explosion-proof vibration sensors. Under joint operations, OLI technology delivers robust performance in chemical sorting, mining sifting, and material processing. |
| CNE Nanyang Explosion-proof Group | 2015 | China's largest research and manufacturing base for explosion-proof electric machines. Combined with Wolong, the Nanyang base delivers high-performance safety-critical motors to global petrochemical, metallurgy, nuclear power, and military platforms. |
| General Electric (GE) Industrial Motors | 2018 | Integrating GE's commercial and industrial electrical drive division brought deep application experience in American markets, providing support for heavy process systems in power plants, cement production, and municipal water treatment plants. |
A detailed breakdown of our key high-voltage motor components, engineered for maximum performance and reliability.
Our rotors feature a robust squirrel cage design optimized for high starting torque and low current draw. For mid-range models, cast aluminum rotors are manufactured using centrifugal casting or advanced high-pressure die-casting. This process forces pure, molten aluminum into the rotor core slots, creating a unified structure that integrates the rotor bars and end rings. This single-piece construction eliminates joints, enhancing mechanical durability and thermal cycling resistance.
For high-capacity, multi-megawatt motors, we use copper bar rotors. Copper bars are precision-inserted and welded to heavy-duty end rings using advanced automatic processes. In high-speed applications, specialized protection rings secure the copper structure, preventing deformation from centrifugal forces and maintaining precise dynamic balance during high-RPM operations.
The stator insulation system determines the service life of high-voltage motors. Our coils are wound from high-purity oxygen-free copper, wrapped in polyester film, and reinforced with woven glass cloth. They are insulated using premium, high-mica content tape to provide high dielectric strength.
Once wound and placed into the core slots, the stator assembly undergoes the Vacuum Pressure Impregnation (VPI) process. Using specialized epoxy resins in pressurized chambers, this process eliminates air pockets and moisture, creating a solid insulation block. The resulting stator offers high electrical performance, mechanical strength, moisture resistance, and thermal stability under cycling loads.
The structural integrity of our motor frames is developed using 3D multi-physics simulation software. These platforms simulate structural loads, heat transfer, and electromagnetic behavior simultaneously, optimizing the frame's heat dissipation ribs and mounting footprints.
Made from high-grade cast iron or structural steel, the frames are designed with ample safety margins to absorb mechanical shocks and isolate rotational vibration. This layout keeps the motor's operating temperatures low, maintains bearing alignment, and minimizes vibration, even when operating in harsh environmental conditions.
Our low-noise ventilation system integrates a cast fan cover, aerodynamic air guide cylinders, an input protection window, and sound-absorbing silencer plates. The system's design helps minimize mechanical vibrations and windage noise.
The ventilation system features side air inlets, allowing the motor to be positioned close to walls or structures without obstructing airflow. Internal acoustic materials absorb high-frequency fan noise, while the IP22 rating prevents accidental contact with the rotating fan blades, ensuring safety in operational spaces.
Meeting the stringent quality, safety, and efficiency criteria of major global markets.
Nemko / ATEX
CSA
CE
CC (CCC)
SABS
TESTSAFE
Wolong maintains a global marketing strategy, holding major international certifications to ensure our motors comply with local grid rules and environmental regulations:
Combining cost efficiency with strict adherence to international standards.
China's industrial landscape has transitioned from high-volume assembly to advanced manufacturing. In the high-voltage motor sector, Chinese facilities leverage vertical supply chain integration. The closeness of raw material processing (silicon steel sheets, electromagnetic copper wire) combined with local automated manufacturing bases helps reduce production lead times.
Our domestic facilities utilize automated precision winding, CNC core cutting, VPI chambers, and automated dynamometer testing systems. This integrated setup reduces production overheads, allowing Shaanxi Nanfang Motor to offer competitive high-voltage and flameproof drives without compromising on material thickness, coil insulation, or test verifications required by IEC and NEMA standards.
Providing tailored drive systems for demanding global industrial applications.
Wolong's range of high-voltage motors is designed for diverse industrial applications, supporting equipment such as ventilation fans, high-pressure water pumps, multi-stage compressors, and material handling systems across sectors including:
Our certified explosion-proof motors (such as the YBBP and YBXY series) drive natural gas pipeline compressors, seawater injection pumps, and refinery exhaust systems in hazardous locations, meeting ATEX and Class I Div 2 safety requirements.
Designed for coal mines and ore processing, our wound rotor induction motors (YR, YRKK) and heavy conveyor drives (YBSD series) provide high starting torque to start loaded conveyor lines and mills.
Our high-capacity YKK and YKS series motors drive boiler feed pumps, circulating water loops, cooling tower fans, and municipal water intakes, offering long-term reliability and low maintenance requirements.
Key considerations for EPC contractors and procurement managers when sourcing high-voltage motors.
Procuring large high-voltage machinery involves complex logistical, financial, and engineering requirements. Procurement teams should evaluate several factors beyond the initial purchase price to minimize long-term operational costs:
Energy consumption accounts for over 90% of a motor's lifecycle cost. Purchasing a high-efficiency IE4 or IE5 motor, though it carries a higher initial price, can lead to significant cost savings over a 20-year operating life. Our engineering team provides detailed ROI calculations based on your local utility rates and operating profiles.
The installation environment determines the choice of cooling system (e.g., air-to-air cooling like YKK, or water-cooled options like YKS). Outdoor locations with high dust concentrations require dust-proof models (such as the YFBKK series), while offshore platforms require specialized anti-corrosion marine paint systems.
Technical answers to common queries regarding high-voltage AC motor selection and operations.
Explore our low-voltage explosion-proof and custom specialty high-voltage motors.
NANFANG