Grinding Mill Retrofit With Permanent Magnet Synchronous Motor (PMSM)
Synchronous Motor Grinding Mill Energy-Saving Retrofit with Permanent Magnet Synchronous Motor
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Before |
Traditional Grinding Mill Problems |
After |
Direct Drive with Permanent Magnet Synchronous Motor |
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Complex mechanical structure |
Permanent magnet direct drive |
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Oil leakage in gearbox |
Closed-loop control system |
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Low operational efficiency |
High efficiency and reliability |
| The original grinding system was powered by traditional motors and gearboxes, resulting in frequent maintenance and energy waste. To address these inefficiencies, the company decided to upgrade the system using Permanent Magnet Synchronous Motors (PMSM). | The retrofit project replaced the original system with a Permanent Magnet Synchronous Motor (PMSM) solution. This upgrade eliminated the need for a gearbox, simplified the structure, and significantly improved energy efficiency. |
| Payback period: 3 years | |
System upgraded: 3 grinding mills
Energy-Saving Results with PMSM Retrofit
Annual Electricity Savings¥212,000
Annual Electricity Savings33%
Energy Saving Rate12%
The total energy cost savings over 10 years¥2.128 million.
Conclusion
This case demonstrates how upgrading to a Permanent Magnet Synchronous Motor system can bring substantial energy-saving benefits and reduce operational complexity. PMSM technology is becoming an essential solution for modern grinding mill applications, offering high performance, low maintenance, and excellent return on investment.