Explore our elite range of quiet-drive and high-voltage compressor motors engineered for absolute acoustic control and hazardous operational demands.
In modern industrial facilities, compressor noise is one of the primary sources of environmental decibel overflow, leading to worker fatigue and regulatory compliance failures. As a leading low noise compressor motor company, our objective extends beyond mere electric power transmission; we focus on advanced acoustic decoupling, dynamic vibration reduction, and high-frequency noise absorption.
By implementing strict structural and fluid multi-physics simulations, we control harmonic excitations at their source. This ensures that whether the motor is deployed in high-pressure gas processing, subterranean mining Ventilation, or municipal cooling, it delivers exceptional operation under minimal sound emissions.
Specifically calculated rotor dynamics and structural reinforcement limit vibration levels far below normal industry limits, avoiding mechanical resonance within compressor casings.
Fully certified and built to withstand harsh, volatile atmospheres in refineries, chemical plants, and underground extraction zones.
Shaanxi Nanfang Motor Technology Co., Ltd. is the authorized distributor of Wolong. Together, we present the combined heritage of global leaders in motor manufacturing.
Wolong Electric Drive Group Co., Ltd. was founded in 1984 and successfully listed on the Shanghai Stock Exchange in 2002 (code SH600580). Over the past three decades, Wolong has grown to establish 3 major global manufacturing bases, 39 advanced factories, and 3 global R&D centers. Through a persistent global brand strategy, Wolong has become a pioneer in the R&D, technology, and manufacturing of electric drives worldwide.
In 2011, WOLONG secured deep technical and technological supports by acquiring 97.94% of the Austrian ATB Group (ATB motor), one of the three major European motor manufacturers. This brought legendary brands into the Wolong family: Morley, with its 130-year history in underground coal mining electric equipment, and Laurence Scott, celebrated for low starting current designs and supplying naval vessel generators and nuclear power facilities. These additions established Wolong as a highly renowned global force.
Brook Crompton Motors joined the Wolong Group, contributing over a century of technological innovation in energy-efficient motors. They led in developing high-efficiency low, medium, and high-voltage AC motors (such as the premium Brook Crompton "W" and "10" series). Similarly, Schorch electric motor joined in 2011. Since 1882, Schorch has defined high standards for oil, gas, chemical, power generation, and steel processing industries, ensuring absolute reliability in heavy industrial test stations and tunnel ventilation systems.
Wolong partnered with OLI vibration motors to dominate the global industrial vibration market. In 2015, Wolong acquired Nanyang Explosion-Proof Group Co., Ltd. (CNE), China's largest explosion-proof motor scientific research and production base. Later in 2018, General Electric (GE) commercial and industrial division partnered with and joined Wolong. Leveraging GE's centuries of commercial and industrial expertise, Wolong now supports heavy industries including oil & gas, metal processing, mining, cement, and advanced water treatment.
Every component is dynamically modeled to eliminate structural harmonics and minimize mechanical noise emissions.
Features squirrel cage geometry with cast aluminum or copper bars. Aluminum rotors are produced using centrifugal casting or high-pressure die-casting, forming a unified frame structure. Larger models utilize copper bar rotors with high-spec dynamic end ring welding and high-speed protection rings, ensuring absolute dynamic balance and minimal rotational hum.
Utilizes low-powder or medium-powder mica tape with high mica content, wrapped in polyester film and glass cloth. After assembly, the stators undergo a VPI (Vacuum Pressure Impregnation) process to eliminate microscopic air voids. This prevents coil movement and electromagnetic vibrations, ensuring high dielectric strength and thermal stability.
Modeled via digital platforms for structural and fluid multi-physics simulation. High-strength cast iron or structural steel provides high redundancy and excellent vibration dampening. Natural frequency isolation margins prevent resonance with the compressor body, allowing the motor to withstand significant mechanical shocks.
Constructed with an integrated silencer plate, air guide cylinder, and protective mesh windows lined with high-density acoustic absorption foam. The side-entry air channel configuration keeps the air flow path clear of obstacles behind the motor, reducing turbulence and fan whine while maintaining IP22 touch-safe safety standards.
Why global industrial enterprises choose us as their long-term compressor motor partner.
From raw copper wire drawing, electromagnetic core lamination punching, to high-precision automatic VPI varnishing systems, our domestic factory chain manages every process. This limits quality deviations and shortens production lead times.
We source cold-rolled silicon steel sheets with low iron loss and pure copper wires with high electrical conductivity. Combined with high-grade carbon steel shafts, our motors deliver long operational life under continuous load.
Our facilities accommodate bulk runs of standard IEC/NEMA frames while maintaining rapid prototype pathways for custom flange, shaft, or high-decibel-suppressed projects.
Ensuring cross-border compliance and safety in hazardous and industrial operations.
WOLONG has secured major product certifications globally, enabling it to navigate regulatory environments in international trade. The certifications are verified proof of design reliability and safety compliance:
Nemko / ATEX
CSA
CE
CC
SABS
TESTSAFE
Delivering high reliability in heavy-duty machinery across diverse sectors.
WOLONG's diverse range of low-noise and high-performance motors are integrated into key industrial machinery. They provide continuous torque output in both standard and hazardous environments:
Drives gas compressors and cooling fans. Features explosion-proof casings and low-noise air intake hoods, preventing ignition while protecting plant workers from noise fatigue.
Supports subterranean coal mine ventilation systems and gas recovery compressors. Designed to withstand dust accumulation and operate continuously in confined spaces.
Features DNV Type Approval certificates for marine propulsion and shipboard air compressors. Resists salt spray corrosion and operates under continuous pitch-and-roll cycles.
Integrates with Variable Speed Drives (VSD) in water treatment plants and cooling towers, adjusting output dynamically to maximize system efficiency.
Innovative technologies driving carbon neutrality and lower acoustic impact.
The industrial sector faces two main challenges: reducing energy consumption and limiting environmental noise pollution. Energy consumption accounts for over 70% of lifecycle motor costs, making transition to high-efficiency standards essential.
Our development team focuses on IE4 and IE5 Permanent Magnet Synchronous Motors (PMSM). In contrast to standard induction models, permanent magnet rotors eliminate rotor copper losses and lower heat generation. This permits a more compact frame and smaller cooling fan, reducing overall noise levels.
By pairing these motors with Variable Speed Drives (VSD), operators can adjust speed to match actual load. This minimizes the aerodynamic whine common in fixed-speed bypass valves.
Modified fan blade geometry reduces air turbulence and whistling at high operating speeds.
Laurence Scott winding configurations prevent electrical surges and voltage drops on local power grids during startup.
Answers to common engineering inquiries regarding sound attenuation and motor performance.
Explore our specialized solutions, including flameproof, dust-proof, and marine-certified industrial motors.
NANFANG
