Transformer and electrical device with transformer

A transformer comprising:

• a first secondary coil unit, a primary coil and a second secondary coil unit arranged in succession along an axial direction;
• and
• a magnetic core comprising a central core portion, which is located in the primary coil, the first secondary coil unit and the second secondary coil unit so that the primary coil, the first secondary coil unit and the second secondary coil unit each surround the central core portion in a radial direction,
• wherein the primary coil is arranged between the first secondary coil unit and the second secondary coil unit,
• wherein a first coil gap defining a first coil distance along the axial direction is provided between the primary coil and the first secondary coil unit and a second coil gap defining a second coil distance along the axial direction is provided between the primary coil and the second secondary coil unit,
• wherein the central core portion has a central gap arranged, along the axial direction, between a first gap and a second gap,
• wherein the first gap and the first coil gap have an identical first position in the axial direction and the second gap and the second coil gap have an identical second position in the axial direction so that the first gap is surrounded in the radial direction by the first coil gap and the second gap is surrounded in the radial direction by the second coil gap, and
• wherein the first coil distance is greater than or equal to a first gap width of the first gap in the axial direction and the second coil distance is greater than or equal to a second gap width of the second gap in the axial direction.