How is three-phase air pump changed into single phase?
The three-phase motor should be replaced by a suitable capacitor, and the wiring can be changed accordingly. If the motor is connected by a star, as long as any two windings are connected in series as the main winding of the single-phase motor, the other phase winding and the capacitor are connected in series as auxiliary windings. If the triangle connection method, the original circuit does not need to change, as long as the phase shift capacitor access. Whether the motor can work properly is the key to the choice of capacitor capacity. Generally C=0.07P (C capacitance capacity, P power)
Domestic power in our country is a phase of three-phase electricity as a line of fire, in conjunction with the ground zero line voltage of 220. When the three-phase voltage is 380, the Japanese motor should be three-phase, with 200V single-phase 110V. A transformer is needed to change the power of each phase from 220 to 110 and then to the motor.
Take one by one between the two voltage 400 volt electrodeless capacitor, and a power single-phase capacitor motor with no other line, a power capacitor connected to either end (forward or backward), the capacity of the capacitor according to the motor power selection (refer to electrical manual, such as one thousand Duowayue capacitance to 400 V, 20uf) at this time, the motor output power is only 55% of the original, the original work can only reach half the maximum pressure. I practice to help people change the connection, very simple, very successful.
