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Split Phase Capacitor Run Induction Electric Motor (Reversible).Ī Split Phase Capacitor Run Induction Electric Motor (Reversible). Good for high starting torque applications such as compressors, loaded conveyors, reciprocating pumps, refrigeration compressors, etc. For continuous operation, around 350 volts is furnished. The voltage supplied to the capacitor by means of the transformer can vary between 600 and 800 volts during start-up. It uses a single pole double throw type transfer switch to impress a high voltage across the capacitor during start-up.Īfter the motor has attained a speed of 70 to 80 percent of synchronous, the transfer switch operates to change the voltage taps on the transformer. Another Split Phase Capacitor Run Electric Motor.Īnother Split Phase Capacitor Run type of electric motor utilizes a capacitor transformer unit and is of the split phase squirrel cage type with the main and auxiliary winding’s physically displaced in the stator. These motors are good for applications requiring high starting torque such as compressors, loaded conveyors, reciprocating pumps, refrigeration compressors, etc. The starting capacitor is generally of the electrolytic type and may range from 80 to 300 micro-farads for 110 volt 60 HZ motors. They can range from 3 to 16 micro-farads. The running capacitor is usually of the paper-spaced oil filled type normally rated at 330 volt AC for continuous operation. The motor starts with the centrifugal switch closed.ĬLICK HERE for Electric Motors and Accessories on AmazonĪfter the motor reaches 70 to 80 percent of synchronous speed, the starting switch opens and disconnects the starting capacitor. The starting capacitor is in parallel with the running capacitor only during the starting period.
MOTOR WINDING DIAGRAM PDF SERIES
A Split Phase Capacitor Run type of electric motor has a running capacitor permanently connected in series with the auxiliary winding. Split Phase Capacitor Run Electric Motor. Motors of this type are suited for air conditioning and refrigeration applications, belt driven fans, etc. The main winding is connected directly across the line, while the auxiliary or starting winding is connected through a capacitor which may be connected into the circuit through a transformer with suitably designed winding’s and capacitor of such values that the two windings will be approximately 90 degrees apart.
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The auxiliary circuit is opened by the centrifugal switch when the motor reaches 70 to 80 percent of synchronous speed.Īlso known as a capacitor-start, induction-run motor. Split Phase Capacitor Start Electric Motor.Ī Split Phase Capacitor Start Electric Motor may be defined as a form of split-phase motor having a capacitor connected in series with the auxiliary winding. This motor is good for direct connected drives requiring low starting torque such as fans, blowers, some pumps, etc. The main winding is connected directly across the line, while the auxiliary or starting winding is connected to the line through the capacitor, giving an electrical phase displacement. The motor obtains its starting torque from a rotating magnetic field produced by the two stator windings physically displaced. Motors of this type start and run with a fixed value of capacitance in series with the starting winding. A capacitor is permanently connected in series with the auxiliary winding. Split Phase Permanently Connected Capacitor Electric Motor.Ī Split Phase Permanently Connected Capacitor Electric Motor also has a squirrel-cage rotor with a main and starting winding. These motors are suitable for oil burners, blowers, business machines, buffing machines, grinders, etc. The motor may be started in either direction by reversing either the main or auxiliary (Starting) winding. The function of the starting switch is to prevent the motor from drawing excessive current and also to protect the starting winding from excessive heat. In series with the starting winding is a centrifugal starting switch which opens the starting circuit when the motor has attained approximately 75 to 80 percent of synchronous speed. The Split Phase Induction Electric Motor is equipped with a squirrel-cage rotor for constant speed operation and has a starting winding of high resistance, which is physically displaced in the stator from the main winding. Universal Split Phase Induction Electric Motor. Split Phase Single Value Capacitor (Dual Voltage Type) Split Phase Capacitor Run Induction (Reversible) Split Phase Permanently Connected Capacitor Internal Wiring Diagrams of Small and Fractional Horsepower Electric Motors The auxiliary winding switch connections must be made so that both of the auxiliary windings become de-energized when the switch opens. Motor Rotation - Dual Voltage, Main & Auxiliary Windings VOLTAGE