High-efficiency asynchronous and synchronous motor lines configured for seamless Hoyer-equivalent integration.
How China's premier heavy-duty electric motor manufacturing network delivers direct, compliant, and cost-effective alternatives to global OEMs.
We design our alternative assemblies to match exact Hoyer frame dimensions, shaft specifications, flange positions (B5, B14, B35), and terminal box entries, ensuring zero modification costs during switchovers.
With industrial environmental regulations tightening across the EU and North America, our replacement options are built directly with premium IE4 and ultra-premium IE5 permanent magnet platforms.
Our solutions match or exceed Hoyer's heavy marine-grade painting specifications (C5-M environment), marine-specific certifications (DNV, ABS, RINA), and standard ATEX zone hazard configurations.
In modern manufacturing, securing a resilient and highly compatible replacement supplier for critical components like Hoyer Motors is vital for continuous operation. Procuring from a leading Chinese motor manufacturer allows global companies to optimize their supply chain, access state-of-the-art R&D designs, and realize significant cost savings. The convergence of strict international trade standardizations (such as NEMA and IEC) means replacements are no longer secondary compromises, but rather highly optimized, direct upgrades.
Additionally, modern supply chain networks face challenges related to logistics, localized certifications, and dynamic operational costs. Transitioning to a certified supplier utilizing the world's most advanced motor production infrastructure ensures not only predictable procurement schedules but also guarantees consistent component quality that matches or exceeds standard European specifications.
Shaanxi Nanfang Motor Technology Co., Ltd is the authorized distributor of Wolong. Wolong Electric Drive Group Co., Ltd was founded in 1984 and successfully listed in 2002 (code SH600580).
After more than 30 years of development, Wolong has 3 manufacturing bases, 39 factories, and 3 R&D centers worldwide now. Wolong has always focused on the manufacture of motors and control systems, committed to a global brand strategy, making Wolong a leader in R&D, technology, process, manufacturing and sales in the global market.
The consolidated industrial capability that stands behind every motor replacement, combining international brands and engineering lineages.
In 2011, WOLONG acquired 97.94% of the Austrian ATB Group, one of the three major European motor manufacturers, gaining strong technical and technological support. The ATB group includes the renowned Morley brand in the mining industry, bringing nearly 130 years of history in high-specification, high-performance underground electrical equipment.
Laurence Scott, a pioneer in supplying motors for British nuclear power plants and naval vessels, brings expertise in low starting currents. Schorch, established in Germany in 1882, set the standard for high-quality motors across oil and gas, power generation, water management, and shipbuilding.
Brook Crompton has over a century of mastery in designing energy-efficient motors, offering high, medium, and low voltage AC packages. OLI brings market-leading expertise in vibration motors (MVE) and Ex-proof vibration sensors, operating via a Wolong joint venture in China since 1999.
In 2015, China's largest explosion-proof motor R&D and production base, Wolong Electric Nanyang Explosion-proof Group Co., Ltd. (CNE), joined the Wolong Group. CNE designs low & high voltage Ex-proof asynchronous and synchronous motors for critical military, chemical, and nuclear power installations.
In 2018, GE's commercial and industrial motor division joined forces with Wolong. As a historic manufacturer of industrial electrical equipment, GE's integration with Wolong strengthens the product portfolio for heavy industries including mining, material processing, paper, and wastewater treatment.
WOLONG, originating in the city of Shangyu and burgeoning in China, is now rising as a global pioneer in the advanced cultivation and innovation of electric motor manufacturing! The consolidated capability of these historic European and American brands ensures that our motor replacements are manufactured to meet demanding global standards.
Technical capabilities and design practices engineered to support global motor replacement projects.
Wolong has established motor and drive control R&D centers in China, Europe, and Japan, and established a central research institute in Shanghai. It is committed to the research of leading technologies in the field of motor and control technology. Some products have reached the international leading level.
As a well-known motor manufacturer, Wolong has significant advantages in explosion-proof performance, reliability, and durability. Widely used in challenging environments like petroleum, chemical industries, and coal mines, these products carry certifications including ATEX, IECEx, and CU-TR.
Our portfolio matches a wide range of industrial environments, covering fans, pumps, compressors, and construction machinery. We support ventilation, refrigeration, oil, gas, mining, and industrial automation sectors globally.
Detailed view of the rotor, stator, frame, and cooling systems designed for operational performance.
The rotor features the squirrel cage design, with cast aluminum rotors being widely utilized. These rotors are produced using either centrifugal aluminum casting or die-casting techniques, where molten pure aluminum is poured into the slots of the rotor core, resulting in a single-piece construction that integrates the rotor bars and end rings. The structural integrity and manufacturing process of cast aluminum rotors guarantee the motor rotor's reliability, and also endow the motor with outstanding torque properties. For larger capacity motors, copper bar rotors are employed, which benefit from dependable bar securing and end ring welding procedures. Additionally, the protective ring design of high-speed motors further ensures the reliable operation of the copper bar rotor.
The coil is crafted from polyester film and reinforced with glass cloth, utilizing either low-powder mica tape with a high mica content or medium-powdered mica tape with an abundance of mica. Following the VPI (Vacuum Pressure Impregnation) process, a pristine white coil emerges from the production line. After the billet is extracted from the wire, it proceeds through the VPI process to transform into a finished unit. The winding and insulation are meticulously engineered to provide exceptional electrical performance, mechanical strength, resistance to moisture, and thermal stability.
The motor frame employs a fully digital platform for structural and fluid multi-physics field simulations. This simulation platform retains the original patent's structure and design, utilizing mature, high-strength cast iron (or steel as an alternative). The frame boasts exceptional structural redundancy, outstanding heat dissipation properties, and ample inherent frequency isolation margins for the entire machine. It is engineered to endure significant mechanical shocks, maintain a superior vibration level, and ensure a lower temperature increase in the motor.
The low-noise fan cover system comprises a fan cover body, an air guide cylinder, a protective window, and a silencer plate. Its compact structure and lightweight design facilitate vibration reduction. The air inlet is situated on the side, which optimizes the avoidance of obstacles behind the motor, minimizing adverse effects on ventilation and reducing noise caused by energy loss during propagation path changes. The system also incorporates sound-absorbing materials that absorb noise, thereby lowering the overall motor noise. Additionally, the fan cover is rated IP22, ensuring that hands cannot come into contact with the fan.
Inspecting our machining, winding, and automated assembly operations.
Verified compliance records for global deployment, matching regional grid protocols and safety regulations.
To ensure international market access, Wolong secures key product certifications across global regulatory jurisdictions:
Nemko/Atex
CSA
CE
CCC
SABS
TESTSAFE
Wolong's drive solutions support operations in demanding environments worldwide.
As a manufacturer of motors and drive solutions, Wolong operates 39 manufacturing facilities and 4 research and development centers across countries including China, Vietnam, the United Kingdom, Germany, Austria, Italy, Serbia, Mexico, and India.
Wolong's range of motors supports applications across multiple industrial sectors, driving equipment such as fans, water pumps, compressors, and engineering machinery. These systems support operations in ventilation, refrigeration, construction, oil and gas, petrochemicals, coal chemistry, metallurgy, electric and nuclear power, maritime, and industrial automation.
Supporting pipeline pumps, refining compressors, and processing fans with certified explosion-proof motors.
Providing dust-ignition-proof motors for conveyor systems, crushers, and ventilation fans.
Highly-insulated, salt-spray resistant designs with major international registry certificates.
IE4 and IE5 designs developed to support continuous fan and pumping system operations.
How Shaanxi Nanfang Motor and Wolong lead the transition towards smart and highly efficient industrial systems.
We are developing synchronous permanent magnet motors (PMM) to replace induction systems. These systems maintain high efficiency even under fractional loads, providing energy savings for variable-torque operations.
Next-generation replacements will offer optional wireless vibration and temperature sensors. By monitoring core metrics, they support predictive maintenance to prevent unplanned operational downtime.
Utilizing finite element analysis (FEA) and fluid multi-physics simulations, we refine frame geometries. This results in lighter motor packages with improved thermal dissipation and reduced mechanical vibration.
The table below illustrates structural and operational differences between standard replacement motors and generic standard alternatives:
| Engineering Attribute | Wolong Premium Replacement Line | Standard Replacement Motors | Operational Impact |
|---|---|---|---|
| Insulation Class | Class H (VPI impregnated with Class F rise) | Standard Class F | Extended service life and high thermal load capability |
| Efficiency Standard | IE4 / IE5 Ultra-Premium | IE2 / IE3 Standard | Reduced operating costs and low CO2 emissions |
| Explosion Protection | ATEX/IECEx Ex d IIB/IIC T4 Gb | Basic Ex de / Zone 2 only | Reliable safety performance in Zone 1 applications |
| Structural Rigidity | FEA-modeled high-grade Cast Iron (Grade 250) | Thin Cast Iron or Alum Alloy | Low vibration transmission and high shock tolerance |
Get immediate answers to common technical, commercial, and engineering questions regarding Hoyer motor replacement systems.
We request your motor's nameplate data, dimension drawings, and application details. Our engineering department verifies the shaft extensions, mounting hole spacings, center heights, and flange parameters (e.g., standard B5/B14) to design a replacement that functions without physical modification.
Yes. Through Wolong's brand portfolio and CNE's specialized manufacturing bases, we supply ATEX, IECEx, and major marine registry certified products (including DNV, ABS, CCS, and BV) designed for marine, offshore, and land-based oil & gas projects.
As an authorized distributor of Wolong, Shaanxi Nanfang Motor provides technical coordination, customized options, quality assurance directly from Wolong's factories, and logistics support to deliver cost-effective solutions.
Yes, our motors are built with VPI thermal insulation and can be fitted with insulated bearings (such as NDE insulated bearings) and grounding brushes to prevent electrical shaft currents, making them compatible with modern VFD setups.
By leveraging Wolong's global network and centralized manufacturing platforms, we reduce standard engineering and production lead times compared to typical European suppliers, while maintaining reliable component quality.
Every replacement motor undergoes standard factory testing (routine type tests) for insulation resistance, winding resistance, and vibration levels. We provide complete test records, dimensional drawings, and certification certificates with each shipment.
Medium and high voltage motor configurations developed for specialized industrial replacements.
NANFANG
