Winding structure of unshielded transformer and electronic equipment

The winding structure comprises a primary side, a secondary side, a magnetic core and a framework, the magnetic core is installed on the framework, a primary main winding, an auxiliary winding and a secondary winding are wound on the magnetic core, the grounding end of the auxiliary winding is connected with the magnetic core through a lead, and the grounding end of the secondary winding is connected with the magnetic core through a lead. And the auxiliary winding is positioned between the primary main winding and the secondary winding to form a magnetic core shielding layer. According to the utility model, the auxiliary winding is arranged and connected with the magnetic core, and the winding layer number and the winding width of the insulating tape of each winding are controlled, so that two main problems of EMC electromagnetic radiation and safe leakage current in a switching power supply product can be solved at the same time, and the switching power supply product does not need a Y capacitor; the transfo