Wide-range multi-gear user transformer with adjustable buck-boost voltage

The utility model relates to the technical field of user transformer equipment, and provides a wide-range multi-gear adjustable buck-boost user transformer, which comprises a protective casing, a transformer self-coupling copper wire ring is arranged in the protective casing, the transformer self-coupling copper wire ring comprises an annular magnetic core, and a pure copper winding is wound on the annular magnetic core. The voltage stabilizer overcomes the defects in the prior art, is reasonable in design and compact in structure, solves the problem that an electric appliance cannot be used or is high in loss and even damaged due to the fact that an existing voltage stabilizer is difficult to adjust a low voltage and a high voltage in an ultra-wide range, and is simple in structural combination. Through the arrangement of the voltage display screen, input voltage can be checked conveniently, then the copper wire connectors with different turn ratios are switched through the phase-change switch, then high and