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Permanent Magnet Direct Drive (PMDD) Pulley for Iron & Steel Industry
Project Overview
| Customer | Nanjing Meishan Industrial Development Co., Ltd. (Mining Division) |
| Location | Meishan Mining, Nanjing, Jiangsu, China |
| Application | Belt Conveyor (No. 30, Flotation Concentrator Filtration Area) |
| Equipment | FTY75-1.6-800×1000(380) PMDD Pulley |
| Commissioning Date | May 2021 |
Challenge: Inefficient Traditional Drive System
The original conveyor system used a three-phase induction motor + gearbox, which had:
• High energy loss (only 71% system efficiency)
• Frequent maintenance (grease/oil changes, gear wear)
• Bulky design (3.13-ton motor + gearbox system)
• High startup current & mechanical stress
Solution: Jasung PMDD Pulley
✅ Direct Drive Technology – Eliminates gearbox, couplings, and auxiliary components.
✅ High Efficiency (97% system efficiency) – Saves 28% energy vs. traditional systems.
✅ Maintenance-Free Operation – No gearbox lubrication, reducing downtime.
✅ Compact & Lightweight (2.1 tons) – 34% weight reduction, saving installation space.
Performance Comparison
| Parameter | Original System | Jasung PMDD Pulley | Improvement |
| System Efficiency | 71% | 97% | ↑ 26% |
| Annual Energy Savings | — | 80,881 kWh | (≈ 9.95 tons of coal) |
| Maintenance Cost | High (grease/oil) | Near-zero | ↓ 80% |
| Equipment Weight | 3.13 tons | 2.1 tons | ↓ 34% |
Key Benefits
✔ Energy Savings = Lower OPEX
¥42,867/year (at ¥0.53/kWh).
✔ Reliability & Reduced Downtime
No gearbox failures, minimal bearing maintenance.
✔ Space Optimization
Compact design simplifies installation.
✔ Soft Start & Smooth Operation
Low inrush current, no mechanical shock.
Onsite video
Customer Feedback
"The Jasung PMDD pulley reduced our energy costs by 28% and eliminated gearbox maintenance. Its compact design and high efficiency align perfectly with our sustainability goals."
— Meishan Mining Maintenance Team
Technical Specifications
| Power | 75kW |
| Voltage | 380kV |
| Efficiency | 97% (IE4 equivalent) |
| Weight | 2.1 tons |
| Certification | Compliant with mining safety standards |
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Related Industries
Tel: +86-400-686-9980
Address: No. 108, Changtang Road, Wujin District, Changzhou, Jiangsu, China