Transformer having laminar type on low voltage side

A transformer having laminar low voltage side, comprising:

• a high voltage side part comprising:
• a first base seat;
• a first isolator seat having a plurality of isolators that divide the first isolator seat into a plurality of isolator grooves, wherein an end of the first isolator seat is connected to the first base seat while another, opposite end of the first isolator seat has a positioning groove;
• and
• a plurality of coil sets wound around the first isolator seat, corresponding to and positioned at the plurality of isolator grooves, respectively;
• a low voltage side part comprising:
• a second base seat;
• a second isolator seat having an end connected to the second base seat and another, opposite end defining a central column, wherein the central column is partially positioned in the positioning groove;
• and
• a plurality of sheet bodies, each having an opening through which the central column extends, and the plurality of sheet bodies being mutually laminated and interlaced on the central column;
• a spacer on the central column, wherein the spacer is positioned, in an axial direction of the transformer, between (i) the end of the first isolator seat which has the positioning groove and (ii) the sheet bodies, the spacer adjusting a spacing between the low voltage side part and the high voltage side part to provide room for various numbers of the sheet bodies.