China AC Permanent Magnet Motor Factory & Factories

Empowering Industrial Decarbonization through High-Efficiency Permanent Magnet Synchronous Motors (PMSMs) & Drive Solutions

Shaanxi Nanfang Motor Technology Co., Ltd

As the authorized global distributor of Wolong Electric Drive Group Co., Ltd, Shaanxi Nanfang Motor Technology delivers world-class industrial drivetrain systems. Wolong, founded in 1984 and listed on the Shanghai Stock Exchange in 2002 (code SH600580), has established itself as the premier global manufacturer of electric motors and control solutions.

Wolong operates 3 R&D centers, 39 state-of-the-art factories, and 3 global manufacturing bases. By integrating world-class engineering, high-efficiency manufacturing technologies, and global brand consolidation, Wolong provides customized industrial motors that excel in petrochemicals, mining, energy, and process industries globally.

Learn More About Wolong

100+

Production Lines Worldwide

58+

Countries Reached

32+

Global Invention Patents

200+

Mega Scale Projects Delivered

A Legacy of Global Acquisitions & Technical Synergy

Through aggressive international acquisitions, Wolong has unified centuries of European and American motor design heritage under a single dynamic R&D ecosystem.

ATB Group (Austria)

Acquired in 2011, ATB (incorporating Morley and Laurence Scott) brought 130 years of underground mining and nuclear power experience, establishing a strong foundation in heavy-industry engineering.

Brook Crompton

A pioneer in high-efficiency electric motors, offering an extensive range of premium low, medium, and high voltage AC motors (e.g., the 'W' and '10' series) for hazardous environments.

Schorch (Germany)

Founded in 1882, Schorch delivers heavy-duty custom driving systems for oil and gas, power generation, maritime, and steel processing industries worldwide.

General Electric (GE) Motors

Wolong acquired GE's commercial and industrial motor division in 2018, integrating decades of American manufacturing standardizations and technological heritage into its operations.

Technology Roadmap & Future Outlook

Unlocking the physics of Permanent Magnet Synchronous Motors (PMSMs) and their performance advantages over traditional induction motors.

The Shift to Permanent Magnet Technology

Unlike standard induction motors that require rotor current to generate a magnetic field (resulting in significant rotor copper losses), Permanent Magnet Synchronous Motors (PMSMs) use high-coercivity NdFeB (Neodymium Iron Boron) rare-earth magnets to create a constant magnetic flux. This design eliminates rotor-side electrical losses, allowing the motor to consistently meet or exceed IE5 Ultra-Premium efficiency standards across its entire operating range.

Wolong's future technology roadmap focuses on developing heavy rare-earth-free permanent magnet motors. By applying advanced grain boundary diffusion (GBD) technology, we reduce dysprosium and terbium usage without sacrificing thermal performance or risking demagnetization under heavy load conditions.

Flat Efficiency Curves

Traditional induction motors see their efficiency drop significantly when operating below 75% load. Wolong PMSMs maintain high efficiency down to 25% load, making them ideal for variable-torque loads like fans and centrifugal pumps.

Smart Grid Integration & VFD Synchronization

Our motors are designed to pair with smart VFDs (Variable Frequency Drives). High-resolution feedback systems enable precise speed and torque control in demanding automation setups.

China Factory 4.0: Supply Chain Resilience & Efficiency

How our integrated raw material access and advanced manufacturing facilities guarantee quality, reliability, and cost-effectiveness.

Rare-Earth Raw Material Security

China is home to the world's most complete rare-earth supply chain. Our direct partnerships with major NdFeB processors ensure stable material pricing and steady delivery times, protecting buyers from market volatility.

High-Precision Dynamic Balancing

Our automated production lines use dynamic balancing systems to ensure low vibration levels. This minimizes bearing wear and extends the service life of our motors in 24/7 continuous operations.

Class H VPI Insulation System

Our stators undergo Vacuum Pressure Impregnation (VPI) with Class H polyesterimide resins, forming a solid structure that resists moisture, chemicals, and voltage spikes from VFD operation.

Engineered Excellence: Inside a Wolong Motor

Every component is engineered to high tolerances using advanced materials and modern manufacturing techniques.

Precision Wound Rotor Assembly

Precision Rotor Engineering

Our squirrel cage and copper-bar rotors are manufactured using high-pressure die-casting or automated end-ring welding. For high-speed applications, we add protective retaining rings to prevent magnet detachment, ensuring reliable operation at high speeds.

Stator Manufacturing & VPI Insulation

VPI Stator Insulation

Our stator coils are insulated with high-mica tape and polyester films, followed by a full Vacuum Pressure Impregnation (VPI) cycle. This delivers excellent mechanical strength, moisture resistance, and thermal performance.

High Strength Motor Frame

Heavy-Duty Cast Iron Frame

Designed using multi-physics simulation software, our high-tensile cast iron and steel frames feature large cooling fins. This geometry optimizes heat dissipation while keeping vibration to a minimum.

Low Noise Fan Cover Design

Low-Noise Fan Cover

Featuring integrated acoustic baffles and an optimized air intake, our IP22-rated fan cover system reduces noise while maintaining high airflow rates for optimal cooling.

Macro-Industry Solutions & Application Case Studies

We deliver reliable motor solutions engineered for specific, demanding industrial applications around the globe.

Oil, Gas, & Petrochemical

Explosion-proof motors certified to ATEX, IECEx, and EAC standards. Engineered with positive-pressure (Ex p) and flameproof (Ex d) enclosures, these motors are built to operate safely in zone 1 and zone 2 hazardous areas.

Heavy Industry & Mining

Our Morley flameproof motors are designed to power mining conveyors, shearers, and continuous miners in underground coal mines. They offer high starting torque and resist shock and vibration.

Water Supply & Wastewater

Energy-efficient PMSMs and high-voltage motors designed for municipal pumping stations. These motors deliver reliable performance and high efficiency under fluctuating load profiles, helping to lower utility costs.

Localization Support, Certifications, & Compliance

Wolong motors comply with all major international quality and testing standards, allowing for seamless integration into global markets.

Nemko / ATEX Certificate

Nemko / ATEX

CSA Certificate

CSA Group

CE Certificate

CE Compliance

CCC Certificate

CCC Standard

SABS Certificate

SABS Standard

TestSafe Certification

TESTSAFE

ISO 9001 Standard Compliance

Wolong is an ISO 9001:2015 certified manufacturer. Every step of our production process, from sourcing raw materials to final dyno testing, is documented to maintain product quality and traceability.

NEMA Mechanical Specification

For North American industrial projects, we manufacture motors to NEMA standards. Our NEMA motors undergo performance tests, including starting current, temperature rise limits, and vibration monitoring, and carry UL and CSA certifications.

IECEx & ATEX Standards

To support explosion-proof applications in Europe and global oil fields, our motors are certified to IECEx and ATEX. This facilitates compliance verification and installation approvals in hazardous areas.

TestSafe Australia

With TestSafe certification, Wolong motors comply with Australian coal mining regulations, enabling direct imports of high-efficiency motors into Oceania and mining projects worldwide.

Frequently Asked Questions (FAQ)

Technical answers to key integration questions about industrial Permanent Magnet Motors.

Q1: How do Permanent Magnet Synchronous Motors (PMSMs) compare to standard AC Induction Motors?
PMSMs use NdFeB permanent magnets to generate a constant rotor field, eliminating the rotor copper losses found in induction motors. This design delivers higher power density, lower operating temperatures, and flat efficiency curves down to 25% load, which helps lower operating costs in variable speed applications.
Q2: How does Wolong prevent irreversible demagnetization in high-temperature environments?
We use high-coercivity magnets with high temperature ratings (up to 180°C or 200°C) and apply Dysprosium (Dy) grain boundary diffusion. Additionally, we run multi-physics thermal simulations to ensure the magnets stay well below their critical demagnetization temperature under full-load and transient conditions.
Q3: Can a PMSM be run directly on-line (DOL) without a drive?
No, standard permanent magnet synchronous motors require a Variable Frequency Drive (VFD) with compatible control software to start and run. The drive synchronizes the stator's rotating magnetic field with the rotor's permanent magnet field.
Q4: What certifications do Wolong motors hold for hazardous, explosive environments?
Our explosion-proof motors are certified to international standards including ATEX, IECEx, CSA, EAC (Customs Union), SABS, and TestSafe (Australia). These certifications cover flameproof (Ex d), increased safety (Ex e), non-sparking (Ex n), and positive pressure (Ex p) protection methods.
Q5: How does the VPI insulation system benefit motors operated by VFDs?
Variable Frequency Drives can generate high-frequency voltage spikes and transient dV/dt stresses that degrade standard motor insulation. Our Vacuum Pressure Impregnation (VPI) process with Class H resins eliminates air pockets in the stator slots, providing high dielectric strength and mechanical protection against these electrical stresses.