THREE PHASE INDUCTION MOTOR FOR POLE-CHANGE WITH SINGLE PHASE INPUT HAVING EXPLOSION-PROOF TYPE FOR VAPOR RECOVERY SYSTEM

PURPOSE: A pole change three phase inductive motor for a vapor recovery system is provided to improve starting torque using a starting condenser and a starting switch. CONSTITUTION: A phase compensation condenser(300) supplies the driving power to a four-pole/eight-pole change motor(600) after converting the single phase to three phase of the commercial power supplied from a power supply unit(100). A pole selection switch(200) selects the number of poles of the pole change motor to the four-pole or eight-pole. A pole change switch(500) supplies the output power to the four-pole/eight-pole change motor after converting the number of poles of the output power according to the selection of the pole selection switch. A starting unit(400) improve the starting torque of the four-pole/eight-pole of the pole change motor.