Transformer and transformation system

The utility model provides a transformer and transformation system, magnetic core includes first flange, second flange and centre post, first flange and second flange are located the both ends of centre post, first lead includes first end and second end respectively arranged on the first flange and second flange, second lead includes third end and fourth end, the first conducting wire and the second conducting wire are respectively arranged on the first flange and the second flange, the third conducting wire comprises a fifth end and a sixth end and is respectively arranged on the first flange and the second flange, the fourth conducting wire comprises a seventh end and an eighth end and is respectively arranged on the first flange and the second flange, and the first conducting wire, the second conducting wire, the third conducting wire and the fourth conducting wire are wound on the middle column. The first wire and the second wire are wound on the middle column in a mutual twisting mode, and the third wire