Split Phase Motor and Capacitor Start Induction Run Motor

Split Phase induction motor

• A high resistance is connected in series with the starting winding. 
• The angle between starting current and main current is in the range of 20⁰ to 30⁰.
• The starting torque is 1.5 to 2 times that of full load torque.

Speed Regulation

• The speed drops from no load to full load is in the range of 2 to 5%.
• The speed regulation of the split phase motor is nearly same as that the three phase induction motor therefore it is called as constant speed motor.

Power Rating

• The wattage rating of such motor is in the range of 40 W to 250 W.

Application

• Fans
• Blowers
• Washing machine
• Small machine tools
• Duplicating machine

Capacitor Start – Induction run motor

• An electrolyte capacitor is connected in series with the starting winding. 
• The angle between starting current and main current is in the range of 80⁰ to 90⁰. 
• The starting torque is 3.5 to 4 times that of full load torque.

Speed Regulation

• The speed of the motor varies 10% to 100% from no load to full load

Rating

• It is available in the range of 1/6 HP to 3 HP.

Application

• Compressors
• Elevators
• Conveyors 

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