Industry
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Jasung Gearless PMDD Motor Used in Ball Mill
Project Overview
| Customer | Mining Explosion-Proof Three-Phase PMDD PulleyCMOC GROUP LIMITED |
| Location | Luanchuan |
| Commissioning Date | 2022 |
| Application | Ball Mill System |
Challenge
The original system used an excited synchronous motor + auxiliary equipment (brake wheel, excitation cabinet, main motor oil station, etc.), which had the following drawbacks:
• Low efficiency – High energy consumption due to mechanical losses.
• Multiple failure points – Complex system with frequent breakdowns.
• High maintenance cost – Long downtime for lubrication and repairs.
• Poor startup performance – High inrush current, grid instability, and material buildup during emergency stops.
Solution: Jasung PMDD (Permanent Magnet Direct Drive) System
Key Advantages
✅ Direct Drive (No Gearbox)
• Eliminates mechanical transmission losses, improving efficiency.
✅ 2. High-Efficiency Transmission
• 18-25% energy savings compared to traditional systems.
✅ Soft Start & Stop + Smooth Speed Control
• Reduces mechanical stress and grid impact.
✅ High-Efficiency Permanent Magnet Motor
• >96% motor efficiency with near-unity power factor.
✅ Simplified System, Reduced Maintenance
• No lubrication systems, resistor cabinets, or excitation controls.
• 70% fewer failure points → lower maintenance costs.
✅ Compact Footprint
• 50% space savings vs. traditional motor + gearbox setups.
Performance Results
| Parameter | Original System | Jasung PMDD System | Improvement |
| Efficiency | 85-88% | >96% | ↑ 8-11% |
| Maintenance Cost | High (oil changes, gear wear) | Minimal (sealed bearings, no gears) | ↓ 70% |
| Startup Current | 600% of rated current | 150% (soft start) | ↓ 75% grid impact |
| Footprint | Large (motor + gearbox + aux.) | Compact (integrated design) | ↓ 50% space |
Customer Benefits
• Energy Savings – Reduced electricity costs with high-efficiency PM motor.
• Reliability – Fewer components = fewer failures.
• Lower OPEX – Minimal lubrication and maintenance.
• Smart Control – Smooth speed regulation for optimized production.
Onsite video
Technical Specifications
| Power | 1250kW |
| Voltage | 10kV |
| Speed | 150rpm |
| Cooling | IC411 (Air-to-air) |
| Protection | IP55 (Dust/water resistant) |
|
Original System |
Original system |
New System |
Why Choose Jasung PMDD?
• Proven in Harsh Environments (Mining, Cement, Metals)
• Customizable for High-Power Applications (Up to 10MW+)
• 10-Year Design Life with Predictive Maintenance Support
Related Industries
Tel: +86-400-686-9980
Address: No. 108, Changtang Road, Wujin District, Changzhou, Jiangsu, China