External rotor PMSM

The starting torque of the asynchronous motor used in the traditional drive system is usually 55% of the rated torque, which cannot realize the full load starting of the system, while the starting torque of the mine flameproof three-phase permanent magnet synchronous electric drum is the rated torque 220%, when the working conditions need to be started with full load or overload, it can be started directly without manual unloading, so as to avoid motor damage caused by stalled rotor and overload, and greatly reduce the labor intensity of the operator.