Engineered for high-torque underground conveyor belts and coal extraction machinery operating under AS/NZS compliance standards.
New Zealand's extractive sector exhibits unique geographical and operational conditions. From the alluvial and hard-rock gold mines in Otago and Waihi to the bituminous coal reserves of the West Coast, operations require machinery that can withstand harsh maritime climates, subterranean moisture, and strict environmental regulations.
The Health and Safety at Work (Mining Operations and Quarrying) Regulations 2016 place absolute priority on explosive atmosphere safety. Methane gas hazard management in underground coal extraction dictates the mandatory use of robust flameproof and explosion-proof electrical apparatuses certified under the joint Australia/New Zealand Standard AS/NZS 60079 series.
Furthermore, as New Zealand strides towards its net-zero emissions targets, mining operators are incentivized by the Energy Efficiency and Conservation Authority (EECA) to deploy premium-efficiency motors (IE3, IE4, and IE5). Upgrading conveyor systems, slurry pumps, and ventilation fans to higher-efficiency classes directly lowers Scope 2 electricity emissions and reduces operational expenditure.
Request Localized NZ Engineering ConsultationShaanxi Nanfang Motor Technology Co., Ltd. is the authorized distribution gateway for Wolong Electric Drive Group.
Founded in 1984 and listed on the Shanghai Stock Exchange (SH600580) in 2002, Wolong Electric Drive Group Co., Ltd. has established itself as the global pioneer in electric motor manufacturing and drive systems. Through aggressive strategic acquisitions, Wolong has gathered the most historically significant industrial brands under one umbrella:
Acquired in 2011, ATB represents Austrian engineering mastery, encompassing the legendary Morley brand for underground mining machinery and Laurence Scott for high-voltage power generation drives.
Boasting over a century of motor design heritage, Brook Crompton is synonymous with premium energy efficiency and robust flameproof low voltage applications.
Schorch (est. 1882) sets standards for high-output drives in oil/gas and heavy industry. Nanyang Explosion-proof (CNE) provides heavy-duty Ex motors for extreme, hazardous mine environments.
A breakdown of the component-level engineering that guarantees performance reliability and longevity in deep shafts and high-throughput crushing mills.
The rotor features a highly durable squirrel cage configuration. Cast aluminum rotors are produced using centrifugal aluminum casting or die-casting techniques. Molten pure aluminum is poured directly into the slots of the rotor core, producing a unified construction that integrates the rotor bars and end rings.
For larger high-voltage mining motors, copper bar rotors are utilized, utilizing advanced bar-securing mechanisms and precise end-ring welding procedures. The safety ring structure in high-speed, variable-frequency motors guarantees structural integrity, preventing radial distortion under centrifugal strain.
The stator coil is crafted using polyester film-backed mica tape with exceptionally high mica content. It undergoes a rigorous Vacuum Pressure Impregnation (VPI) cycle, which fills air voids with solventless resins, curing into a monolithic structure.
The winding insulation system is engineered to provide premium resistance to moisture ingress, thermal cycling stress, and chemical degradation. This makes it suitable for geothermal operations and high-humidity subterranean operations across New Zealand.
Our motor frames are optimized using multi-physics simulations to analyze heat transfer and structural vibrations under heavy load conditions. Manufactured from high-tensile, close-grained cast iron (or fabricated steel as an alternative), they incorporate thick structural ribbing.
The heavy-gauge construction provides mechanical shock absorption, isolating internal components from external seismic quarry activities and preventing structural misalignment over decades of deployment.
Designed to address industrial noise health regulations, the cooling fan assembly features an integrated air guide cylinder, protective screening, and sound-absorbing silencer plates.
The side-oriented air inlet pathway minimizes direct back-pressure obstacles, optimizing laminar airflow across the frame fins while reducing structural vibration noise. With an IP22/IP55 rated enclosure, operators are shielded from mechanical contact without sacrificing thermal exchange performance.
Providing regulatory peace of mind with international and regional certifications, ensuring seamless safety audits in New Zealand.
To overcome regional barriers, Wolong maintains certification alignment across key jurisdictions:
The future of industrial extraction systems hinges on connectivity and predictive maintenance. Wolong's drive systems are moving beyond energy efficiency to incorporate integrated vibration sensors, real-time temperature diagnostics, and remote VSD controller interfaces.
By integrating smart diagnostic components directly into the terminal box design, operators in remote regions of New Zealand can monitor stator temperature spikes, rotor bearing anomalies, and insulation leakage current from centralized management control rooms.
This system reduces unplanned downtime in remote locations, allowing operations to order replacements and plan interventions before catastrophic drive failure occurs.
Enquire About Smart-Enabled Motor ModelsOur WEPM series delivers IE5 efficiency, maintaining high torque densities at low speeds, reducing mechanical geartrains and system energy draw.
Direct integration with variable-speed drives allows controlled acceleration ramps for conveyor belts, reducing initial mechanical shear.
Optional dual-layer epoxy finishes rated for C5-M extreme marine corrosion resistance protect motors from acidic mine runoff and coastal salt air.
A comprehensive inventory of explosion-proof pumps, variable-frequency speed regulators, and wound rotor drives tailored for New Zealand's industrial processing plants.
Expert answers addressing the critical mechanical, electrical, and commercial queries raised by New Zealand engineering procurement teams.
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