Research on protection and optimization of dry permanent magnet regulation system for coal-fired unit crusher
YANG Jinyao
WANG Tingfeng
CHEN Kuanglong
Abstract：Permanent magnet drives are widely used in the energy sector.However,the dry-type permanent magnet speed regulation devices operate in complex environments and are often affected by faults such as overcurrent,overheating,and vibration.In response to the common fault problems of the dry-type permanent magnet regulation system for coal-fired unit crushers in complex operating environments,a protection optimization scheme based on multi-parameter collaborative control is proposed.By introducing temperature,vibration,electrical,magnetic field,and overspeed protection measures,combined with a fault warning system,the original logic control strategy is optimized.The results show that the optimized system significantly reduces the overload rate of the crusher,shortens the fault diagnosis time,and reduces the hourly power consumption.Through dynamic load protection algorithms and regular inspection and maintenance management measures,the reliability and operational stability of the system are further improved.The optimization scheme effectively extends the equipment lifespan,reduces operating and maintenance costs,and provides a new practical path for energy-saving and green development in the power industry.
Keywords：dry-type permanent magnet speed regulation devicescoal-fired power plantlogic controlsystem protection optimization
Publication Date：2026-02-25
Online Publishing Date：2026-03-31(First online date of this platform, not the publication date of the document)
Pages：5( 139-143 )