AC Single-phase induction motors
Induction motors are the most used driving system, from fractional horsepower to hundreds of horsepower, where speed rotation does not require varying. Single-phase induction motors are largely used in low power applications. Thus bearing design strongly depends upon the final application of the motor. The types of fractional horsepower motors are:
Split-phase induction motors
This type of motor has good efficiency and moderate starting torque. They are widely used as drive motors for washing machines, tumble dryers and dishwashers.
Capacitor start induction motors
They have the same running performance as split-phase motors but a higher starting torque. They are mainly used in washing machine drive systems.
Permanent split capacitor motors
High efficiency, quiet operation and continuous reversibility are the main characteristics for this type of motor. This makes it suitable for use in a wide range of domestic appliances such as washing machines, tumble dryers, fans and air-conditioners.
Shaded pole motors
They are suitable for low power applications (less than 200 W). Typical use is in small domestic fans.