Difference Between 1-Phase & 3-Phase Induction Motor

The 1-Phase and 3-Phase Induction Motor is compared based on the factors such as power factor, efficiency, maintenance, supply, starting torque, applications, etc.

Features 1-Phase Induction Motor 3-Phase Induction Motor
Supply Works on 1-phase supply Works on 3-phase supply
Starting torque Low High
Power factor Low High
Efficiency Less High
Maintenance They are easy to repair and maintain. Difficult to repair and maintain.
Cost Cheaper More expensive
Construction Simple and easier to construct More complicated to construct
Reliability More reliable Less reliable
Types 1. Split phase induction motor
2. Capacitor start inductor motor
3. Capacitor start capacitor run induction motor
4. Shaded pole induction motor
1. Squirrel cage induction motor
2. Slip ring induction motor or wound induction motor or phase wound induction motor
Applications household appliances like vacuum cleaner, fans, washing machine, centrifugal pump, blowers, washing machine, small toys, etc. Three-phase induction motors are widely used in industrial and commercial drives because they are rugged, reliable and economical.

Note: The 1-Phase Induction motor is not self-starting motor while 3-phase induction motor is a self-starting motor.

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