Patent ID: 11967448
Assignee: KIA MOTORS CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. A planar transformer comprising:
a primary printed circuit board (PCB) having a hole in which a core is inserted and including a coil pattern;
a secondary PCB having a hole in which the core is inserted and including a coil pattern; and
a heat dissipation plate disposed between the primary PCB and the secondary PCB and including a hole in which the core is inserted,
wherein inner heights of a first core and a second core are larger than a sum of thicknesses of the primary PCB, the heat dissipation plate and the secondary PCB so that a leakage inductance of the planar transformer is adjusted by adjusting a thickness of the heat dissipation plate.