If the power of the three-phase motor is less than kilowatts, you can connect two of the three-phase power terminals to the single-phase power supply, connect a capacitor in series to the other terminal, and then connect it to any two terminals, one connected.
If starting under a heavy load, use two capacitors, one for starting and one for running. If it's a light load start, you just need to add a working capacitor. For a motor with star-connected three-phase windings, the working capacity is equal to 0.06*power, and the working capacity of a 1000 watt motor is 60 UF.
For a motor with three-phase windings in corner connection, the working capacity is equal to 0.1*power. The working capacity of a 1 kW motor is 100 UF. The starting capacitor capacity does not need to take into account the motor connection method. She is generallynt calculated to be approximately 2 or 5 times the capacitance of the operating capacitor. After calculation, 2 to 3 UF capacitors should be used for 10 watts.
Detailed information:
Operating principle
Single-phase asynchronous An electric motor is a rotating electrical machine powered by a single-phase AC supply and its stator winding is single-phase. When a single-phase alternating current is connected, it generates an alternating pulsed magnetic field in the air gap of the stator and rotor, so the single-phase asynchronous motor cannot start automatically. In an AC motor, when the stator winding passes AC current, an armature magnetomotive force is established, which has a significant impact on the energy conversion and operating performance of the motor.
So the single phase AC winding is connected to the single phase AChased to generate a pulsed magnetomotive force. This magnetomotive force can be decomposed into the sum of two rotating magnetomotive forces of equal amplitude and opposite speed. so that in the air gap Establish the sum of the direct and reverse magnetic fields. These two rotating magnetic fields cut the rotor conductor and generate an induced electromotive force and an induced current in the rotor conductor, respectively.
Reference documents:
Baidu Encyclopedia - Single-phase motor