Starting control method and system of single-phase alternating current motor, single-phase alternating current motor soft starter and single-phase alternating current motor

The invention provides a starting control method and system of a single-phase alternating-current motor, a soft starter of the single-phase alternating-current motor and the single-phase alternating-current motor, and relates to the field of motor control. The single-phase AC motor soft starter is characterized in that a cathode of an operation thyristor J1, a first end of a relay K1, a cathode of a starting thyristor J2 and a first end of an operation capacitor C2 are respectively connected with a power supply anode of a single-phase AC motor; the anode of the operation thyristor J1 and the second end of the relay K1 are respectively connected with the first end of the operation winding R1; an anode of the starting thyristor J2 is connected with a first end of the starting capacitor C1, a second end of the starting capacitor C1 and a second end of the running capacitor C2 are respectively connected with a first end of the starting winding R2, and a second end of the running winding R1 and a second end of the