The working principle is all through the coupling of alternating magnetic flux between the primary and secondary windings to transfer energy.

2. Differences from Power Transformers:

1> The power transformer has only three positive waves within a cycle due to different requirements for equivalent phases, while the rectifier transformer can have up to 12 or more pulses.

2> There are significant differences in current calculation methods, with the calculation of output current differing greatly from that of power transformers, and also varying depending on the specific rectifier circuit.

3> The purpose and scope of pressure regulation differ; electrical transformers generally require a constant output voltage, while rectifier transformers must not only accommodate voltage fluctuations but also have a threshold voltage that can be adjusted over a wide range.