Industry
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Permanent Magnet Direct Drive (PMDD) Motor Used in Mining Industry
Case Study
| 220kW 380V Permanent Magnet Direct-Drive Motor in Ball Mill Grinding |
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| Location | Huaxi Copper Industry, China |
| Application | Mineral Processing Ball Mill |
| Motor Type | Permanent Magnet Synchronous Direct-Drive Motor (PMSM) |
Project Overview
Huaxi Copper Industry upgraded its traditional gear-driven ball mill with a 220kW 380V 187rpm permanent magnet direct-drive motor, achieving higher energy efficiency, reduced maintenance, and improved grinding performance in copper ore processing.
Key Specifications
| Motor Power | 220kW |
| Voltage | 380V |
| Speed | 187 RPM (direct-drive, no gearbox) |
| Efficiency Class | IE5 (Ultra-Premium) |
| Protection Level | IP65 (dust & water-resistant) |
| Cooling Method | Water cooling |
Why Permanent Magnet Direct-Drive?
✅ 20% Energy Savings – Eliminates gearbox losses (5-10% efficiency loss) and operates at >96% efficiency even at partial loads.
✅ Zero Mechanical Wear – No gears, couplings, or belts → 50% lower maintenance costs.
✅ High Torque at Low Speed – Direct drive delivers full torque at startup, reducing slurry segregation risks.
Measured Performance Benefits
• Energy Consumption Reduction:22% lower kWh/ton vs. the old induction motor + gearbox system.
• Maintenance Savings:CNY 50,000/year saved on gear lubrication, alignment, and belt replacements.
• Uptime Improvement:99.7% reliabilityover 18 months (vs. 93% with the old system).
Technical Highlights
• Smart Motor Control – Integrated variable frequency drive (VFD) for soft starts and load adaptation.
• Robust Design – Heavy-duty bearings and anti-corrosion coating for harsh mining environments.
• IoT Readiness – Vibration/temperature sensors enable predictive maintenance via SCADA.
Onsite video
Related Industries
Tel: +86-400-686-9980
Address: No. 108, Changtang Road, Wujin District, Changzhou, Jiangsu, China