... axial fan,ventilation fan, Duct fan, shaded pole motor, external rotor fan motor,aluminum die casting parts, stator and rotor, Developing ... enterprise. 2 Specifcation(1)Overview: The temperature of the motor is measured when the fan is under zero static pressure ... L15: Core length code4: P4 : Motor pole numbe, 2,4,6,8 poles3. Products Display4. Factory Production Display 25w-1500w ac synchronous motor