Among the various types of electric motors, external motors are known for their compact design and greater utility. This type of motor is ideally suited for fans and other equipment. The external motors a save considerable amount of space. This is because the rotor of external motor is placed outside. The unique feature of external motor is that the external rotor component has been used as the hub of fan impeller. In some of the fans like, for example, Ziehl Abegg fans, the impeller and hub of the external motor have been used as one of the units of short axial of the fan.
Enables accurate balancing:
The external motor is so compact that it can be effectively used as a squirrel cage motor. In addition to this, the motor is capable of accurate balancing, which enhances its efficiency...Read More