1. Identify the silicon steel sheet from the stacking method of the silicon steel sheet. The silicon steel sheet of the E-shaped power transformer is interleaved, and the E version crosses. I don't want to leave a blank gap. The whole core matches the film. The difference between the audio input and output transformer E piece and the certain air gap of my film, this is the most intuitive way of power and audio transformer. This C-shaped transformer is a general power transformer.

2. Identification of the number of terminals drawn from the windings. Power transformers usually have two windings, one primary and secondary winding, so there are four terminals. Some power transformers add shields between the primary and secondary windings to prevent humming and other interference. Therefore, the power transformer is at least four terminal.

3. Recognition from the shape The iron cores of commonly used power transformers are E-shaped and C-shaped. Aifan core transformer is E architecture, with high quality, D42 D41 silicon steel core and widely used. The C-shaped iron core transformer uses cold rolled silicon steel strip as the iron core, which is small in size and is the core structure.