Large Grinding Mill High Voltage Synchronous Motor

The voltage of large grinding mill is generally 6kv/10kv and the power is 400kw-20000kw.
Large grinding mill high voltage synchronous motor can meet the 24-hour continuous heavy-load operation requirements of the grinding mill through the principle of synchronous rotation and high-voltage adaptation.
Key Technical Parameters

Structural characteristics
Base: is made of welded steel plates, using high-strength steel plates (such as Q345 series), which have significantly better tensile and impact resistance than cast iron. Moreover, the ribs and layout can be flexibly adjusted according to the motor power and installation scenario, while ensuring the heat dissipation of Large grinding mill high voltage synchronous motor

Stator: the stator core is made of 0.5mm thick low loss silicon steel sheets laminated together, which reduces losses by more than 20% compared to the commonly used 0.6mm silicon steel sheets in mining motors. The laminating process is tight, and there is no dust entering the mining area, which can cause the core to loosen.
The core is equipped with a radial ventilation groove that runs through it, unlike traditional ventilation methods that are prone to blockage. The heat dissipation efficiency is reduced by 40%,this stator design will reduce electricity costs, minimize equipment downtime, and save maintenance expenses.
The stator coil adopts double-layer stacked winding or parallel winding, and undergoes vacuum pressure impregnation (VPI) treatment to enhance insulation performance and mechanical strength.
Rotor:
1. The magnetic poles are made using steel plate punching technology, which has high precision and sufficient strength. The tight assembly with the magnetic yoke can reduce vibration and noise during operation, improve rotor stability, reduce shaking during the operation of the grinding machine, indirectly ensure grinding accuracy, and avoid uneven material grinding caused by equipment vibration.
2. The insulation level of magnetic pole coils generally adopts F level, which can withstand a working temperature of 155 ℃, reduce the risk of insulation aging, increase the service life of the coil, and reduce the frequency of shutdown maintenance.
3. Support customized shaft design, no additional processing required by users, directly adapt to pneumatic clutches, reduce equipment assembly cycles and adaptation costs, eliminate the need for users to modify shafts themselves, enable equipment to be quickly put into production, and improve overall installation efficiency
Bearing: Adopting seat type bearings, there are two types: oil ring type or composite type, combined with two lubrication methods, which can work continuously for more than 8000 hours. It can adapt to high load and long-term operation scenarios of grinding machines, avoid interruptions in grinding production lines caused by bearing failures, and ensure continuous production.
Below is the Large grinding mill high voltage synchronous motor produced by Milestone Motor

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