Single fan cooling-this kind of motor usually uses a single radial fan and is installed at the extended end of the shaft, and the cold air enters through the air inlet on both sides of the back end of the motor, and is discharged through the air outlet on both sides of the front cover after cooling.

Two-way fan cooling-the motor adopts a symmetrical radial ventilation cooling system at both ends. When the capacity of the motor is large and the speed is high, the axial flow blade fan is adopted, and the cold air enters in parallel from the air inlets at both ends of the motor, and then is divided into two channels through each fan, all the way into the axial ventilation duct of the rotor,

Then the stator core is discharged from the back of the machine through the radial ventilation duct of the rotor and the stator: the other way enters the motor and flows to the end of the rotor winding and the end of the stator winding, and it is also discharged from the back of the stator core, and the stator core is cooled many times, thus improving the cooling effect.

Therefore, the two-way fan ventilation and cooling mode is suitable for high speed, and there are more high-power motors.

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