On the high-voltage side of the transformer, the incoming line is connected to DK124 (5-8), and the outgoing line is connected to the positive pole of the high-voltage DC bus. The low-voltage side of the transformer is connected to the rectifier diode, and the outgoing line is connected to the low-voltage side ground wire. Do not reverse the direction of the transformer during winding, for example, the high-voltage side should be from left to right, and the low-voltage side should also be from left to right. Due to the flyback scheme, the transformer belongs to an energy storage device, so it is necessary to polish the air gap in the magnetic core column to ensure that the inductance of the high-voltage side winding of the transformer is within the required range.