Starting power generation system capable of achieving automatic winding switching

The invention provides a starting power generation system capable of achieving automatic winding switching. The starting power generation system capable of achieving automatic winding switching comprises a three-phase motor with a tag in the middle, a three-phase inverter, a three-phase rectifier bridge and an electromagnetic switch. When the system is used for starting an engine, the electromagnetic switch enables the tail end of a three-phase winding to be in a short circuit state, a first part winding A1 and a second part coil A2 of the A-phase winding are connected in series, the number of windings is large, and the starting torque is large; when the system is used in the engine, the electromagnetic switch is switched off, the first part winding of the three-phase winding is connected to three H-bridge rectifiers, the number of windings is small, and the system is suitable for high-speed running during power generation. The technology of the starting power generation system capable of achieving automatic winding switching is very suitable for low rotation speed starting and high rotation speed running during power generation.