Explore our foundational range of certified electric motor products, delivering optimized industrial power globally.
Analyzing key procurement criteria, macro-industry dynamics, and the role of high-efficiency motor drives in the transition to net-zero operations.
In the current era of industrial modernization, high-voltage and low-voltage electric motors constitute the literal heartbeat of heavy industrial operations. Globally, electric motor-driven systems account for approximately 45% to 50% of global electricity consumption. Consequently, modern EPC (Engineering, Procurement, and Construction) companies, petroleum engineers, mining directors, and system integrators no longer look for simple machinery; they look for integrated, high-reliability driving solutions. The demand for Master Line Motors has grown significantly as international standards (such as NEMA, IECEx, ATEX) dictate stricter guidelines regarding energy efficiency and operational safety in hazardous environments.
To acquire a competitive advantage in international markets, organizations must navigate diverse localized power grid requirements, fluctuating frequencies, and extreme operational stresses. These stresses include thermal variation in desert oil fields, corrosive atmospheres in maritime operations, and structural vibration in underground mining. Addressing these variables requires a manufacturer that has achieved deep vertical integration across design, material science, and global testing standards.
Shaanxi Nanfang Motor Technology Co., Ltd. stands as the authorized distributor of Wolong. Wolong Electric Drive Group Co., Ltd. was established in 1984 and listed successfully on the Shanghai Stock Exchange in 2002 (code SH600580). For more than three decades, Wolong has expanded its capability through organic technical R&D and aggressive international brand acquisitions, evolving into a dominant global pioneer of electric drives.
Wolong operates 3 major manufacturing bases, 39 state-of-the-art factories, and 3 core R&D centers across the globe. Driven by a unified global brand strategy, Wolong delivers unparalleled engineering technology, rigorous manufacturing processes, and localized distribution networks.
How Wolong consolidated century-old European and American motor manufacturers to build a world-class technology ecosystem.
In 2011, Wolong acquired a 97.94% stake in the Austrian ATB Group, positioning Wolong as one of the world's most capable industrial motor conglomerates. This strategic move brought renowned legacy brands under Wolong's umbrella:
Joining the Wolong family, Brook Crompton brings over 110 years of industrial motor mastery. Best known for pioneering mechanical optimization in energy-efficient drives, the brand's premium "W" series and "10" series serve as benchmarks for medium- and low-voltage AC motor efficiency. Brook Crompton is highly integrated with digital variable speed drive (VSD) packages to ensure high power density and reliable drive dynamics.
Established in Germany in 1882, Schorch remains a symbol of extreme engineering, delivering bespoke, high-output driving systems to global heavy industries, including offshore oil refineries, water treatment installations, and ship propulsion systems. Additionally, Wolong operates a highly successful joint venture with OLI Vibration Motors (MVE series), dominating the global industrial vibration and material separation market.
In 2015, China's largest specialized explosion-proof research and manufacturing base, Nanyang Explosion-Proof Group (CNE), joined Wolong. Nanyang ATB-branded explosion-proof motors are standard in nuclear power plants, pipeline stations, and dangerous petrochemical zones. Furthermore, in 2018, Wolong entered a major commercial and industrial motor partnership with General Electric (GE), further elevating Wolong's product footprint in severe-duty processing fields.
Exploring the precise physics, material science, and thermodynamic engineering behind our motors.
Our rotors feature state-of-the-art centrifugal aluminum casting and die-casting techniques. Pure molten aluminum is poured directly into the slots of the silicon steel rotor core, yielding a unified cage structure integrating the rotor bars and end rings. This ensures the component is free from inner blowholes, micro-fractures, or structural imbalances.
For heavy high-voltage applications, specialized copper bar rotors are utilized, utilizing advanced bar-securing methodologies and automated medium-frequency end-ring welding. High-speed models are outfitted with safety retention rings to handle centrifugal strain under high-frequency conditions.
Stator windings utilize high-quality polyester film paired with glass-cloth reinforced, low-powder or medium-powder mica tape, boasting high mica concentration. Once placed, stator structures undergo a computer-monitored Vacuum Pressure Impregnation (VPI) cycle using solventless epoxy resin.
The resultant winding structure exhibits high mechanical rigidity, zero moisture permeability, and excellent resistance to transient thermal shocks. The class-leading thermal margin guarantees continuous operation under elevated load cycles, extending the operational lifespan of the windings.
Using high-strength cast iron or custom steel plates, the outer frame is designed using digital multi-physics simulation platforms, optimizing structural mechanics and heat dissipation. The structural layout isolates frame resonance from motor harmonics, avoiding localized high vibration stress.
Excellent structural redundancy safeguards the internal alignment under external torque forces. Specialized external cooling ribs maximize convective air cooling efficiency, resulting in a balanced, lower-temperature operating environment.
Our low-noise fan cover system integrates a lightweight fan cover body, custom air guide cylinder, protective security grid, and internal silencer plates. The air intake is located laterally, protecting the unit from potential blockage and optimizing the convective velocity of the incoming air stream.
By reducing air turbulence, the fan assembly lowers overall motor noise. The IP22-rated structural safety grid protects operators from moving components while facilitating heat extraction.
How Wolong motors satisfy strict engineering criteria across high-risk industrial applications.
Hazardous areas (Zone 1, Zone 2, Class I Div 1/2) require explosion-proof classifications. Our YBX4 and YBXKK series explosion-proof motors prevent inner sparks from reaching the outer atmosphere. Ideal for high-pressure pipeline pumps, refinery compressors, and onshore drill pumps.
With brands like Morley within our technical family, our motors resist high dust contamination, moisture, and high starting torque demands. Specifically designed for belt conveyors, rock crushers, and tunnel boring machines (YBU/YBUS/YBUD series), ensuring reliable operations in deep coal mines.
Equipped with anti-corrosive epoxy coatings and IP55/IP56 ingress protection, our heavy-duty induction motors power municipal wastewater pumps, desalination plants, ship propulsion systems, and auxiliary marine generators.
Global purchasing managers face three key challenges: total cost of ownership (TCO), regulatory compliance, and on-time commissioning. Wolong resolves these challenges through a unified engineering network. By standardizing component manufacturing and integrating local maintenance support, we minimize risk for international procurement projects.
Whether dealing with NEMA standards in North America, IEC directives in Europe, or regional safety approvals in South Africa and Australia, our compliance portfolio guarantees swift customs clearances and local installation approvals.
A look at the certifications backing Wolong's international distribution capabilities.
Our commitment to rigorous testing goes beyond general standard compliance. Every motor batch is subjected to a battery of stress analyses, including thermal imaging, partial discharge tests, dynamic vibration tracking, and shaft current measurements (vital for variable frequency operations).
Nemko / ATEX
CSA
CE
CCC
SABS
TESTSAFE
Pioneering the next generation of permanent magnet machines, grid stability, and IoT condition monitoring.
As global energy prices fluctuate and decarbonization targets loom, traditional induction motor designs are approaching their physical limits. Wolong is driving the transition toward Permanent Magnet Synchronous Motors (PMSMs) (such as the WEPM series). PMSM technology offers high power density, superior partial-load efficiency, and low rotor temperature profiles compared to induction motors.
Additionally, we supply Distributed Synchronous Condenser System Solutions. These units are critical for modern power grids with high renewable energy penetration, helping stabilize grid voltage during transmission drops and providing essential reactive power support.
Looking ahead, we are incorporating smart vibration sensors and temperature transceivers directly into the motor housing, allowing operators to monitor system health in real-time, predict bearing wear, and eliminate costly unplanned downtime.
Answering key engineering questions regarding high-voltage design, explosion protection, and VFD integration.
Explosion-proof motors (such as the Wolong WEX3 or YBX4 series) are engineered with heavy flameproof enclosures designed to contain internal electrical arcs, sparks, or explosions. They prevent these internal events from igniting volatile surrounding gases or dust particles in Zone 1, Zone 2, or Class I/II Division environments. In contrast, standard industrial motors feature general open-drip or totally enclosed structures without flameproof seals or rated joint gaps.
The Vacuum Pressure Impregnation (VPI) process draws air and moisture out of the stator winding assembly under deep vacuum, then forces solventless insulating resin into the void spaces under pressure. Once baked and cured, the windings form a solid, void-free structure. This design provides high moisture resistance, chemical protection, and mechanical strength, preventing localized hot spots and insulation failure.
Cast aluminum rotors are standard for light-to-medium frame sizes due to their balanced torque profile and cost efficiency. However, copper bar rotors are recommended for large high-voltage motors or high-starting-torque applications (such as large water pumps and conveyors). Copper's superior electrical conductivity reduces electrical losses and heat buildup, improving overall drive efficiency.
VFDs generate fast voltage pulses (high dV/dt), which can induce voltage stress on stator insulation and cause electrical discharge through the bearings, potentially leading to premature failure. Wolong's variable frequency motors (such as the WEPM and YBBP series) feature reinforced corona-resistant insulation systems alongside insulated bearings or shaft grounding brushes to safely redirect shaft currents.
PMSM motors feature embedded rare-earth magnets on the rotor, eliminating rotor copper losses and heat. This allows PMSMs to achieve IE5 efficiency ratings, maintaining high efficiency even under partial load. Their compact size and lightweight profile make them ideal for space-constrained installations requiring precise speed and torque control.
Select specialized models from our complete product line, designed to meet strict performance and safety standards.
NANFANG
