A novel high-frequency and high power density planar insulated core transformer (PICT) applied to high voltage direct current (DC) generator is introduced. PICT’s operating principle and fundamental configuration are described, and preliminary experimental results in self-designed PICT apparatus are presented. Emphatically, magnetic leakage flux (MFL) giving rise to the output voltage drop is analyzed in detail both theoretically and by finite element method (FEM). Showing good consistency with experimental result, FEM simulation is considered to be practicable in physical design of PICT. To cancel out leakage inductance and improve the voltage uniformity, compensation capacitor is adopted and experimental verification is also presented. All shows satisfactory results.
J D Cross. US Patent 5631815, High voltage power supply, 1997.
J A Collier. US Patent 5166965, High voltage DC source including magnetic flux pole and multiple attacked AC to DC converter stages with planar coils, 1992.
R J Van de Graaff. US Patent 3187208, High voltage electromagnetic apparatus having an insulating magnetic core, 1965.
A W Lotfi and M A Wilkowski. Issues and advances in high-frequency magnetics for switching power supplies. P IEEE, 2001, 89: 833-845. DOI: 10.1109/5.931473http://doi.org/10.1109/5.931473
D van der Linde, C A M Boon and J B Klaassens. Design of a high-frequency planar power transformer in multilayer technology. IEEE T Ind Electron, 1991, 38: 135-141. DOI: 10.1109/41.88907http://doi.org/10.1109/41.88907
R J Huljak, V J Thottuvelil, A J Marsh, et al. Where are power supplies headed. Appl Power ElectL Co, 2000, 1: 10-17. DOI: 10.1109/APEC.2000.826076http://doi.org/10.1109/APEC.2000.826076
C Quinn, K Rinne, T O’Donnell, et al. A review of planar magnetic techniques and technologies. Appl Power Elect Co, 2001, 2: 1175-1183. DOI: 10.1109/APEC.2001.912514http://doi.org/10.1109/APEC.2001.912514
C F Yang. Motor and transmission. Beijing (CHN): Coal Industry Publishing House, 1995, 362-371. (in Chinese)
C W T McLyman. Transformer and inductor design handbook. Beijing (CHN): China Electric Power press, 2008.
C Kang, Y H Liu and D M Li. Analysis of output voltage on a planar insulating core transformer. Nucl Sci Tech, 2011, 22: 15-18.
C Kang, Y H Liu, J M Huang, et al. Compensation of leakage flux on insulated core flat winding transformer. High P Laser Part Beam, 2012, 24: 1595-1598. (in Chinese) DOI: 10.3788/HPLPB20122407.1595http://doi.org/10.3788/HPLPB20122407.1595
V V Kantor. Methods of calculating leakage inductance of transformer windings. Russ Electr Eng, 2009, 80: 224-228. DOI: 10.3103/S1068371209040105http://doi.org/10.3103/S1068371209040105
J H Du. Calculation of leakage inductance of electronic transformer. Transformer, 2009, 46: 10-12.
W W Salisbury. US Patent 2963669, Air-core transformer, 1960.
B S Topsfield. US Patent 3611032, Electromagnetic induction apparatus for high-voltage power generation, 1971.
J D Cross. US Patent 6026004, Modular high voltage power supply with integral flux leakage compensation, 2000.