The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
권호 표지
DOI QR코드

DOI QR Code

Charging Control of Wireless Charging System

무선충전시스템의 충전 제어 방식

  • Shin, Han-Ho (Dept. of Electronic Eng., Pukyong National University) ;
  • Heo, Joon (Dept. of Electronic Eng., Pukyong National University) ;
  • Jeon, Seong-Jeub (Dept. of Electronic Eng., Pukyong National University)
  • Received : 2019.02.02
  • Accepted : 2019.03.11
  • Published : 2019.08.20
Download PDF
⟨ Previous Next ⟩

Abstract

A hybrid control of a rectifier/regulator of wireless power transfer systems for electric vehicles is studied. A combined rectifier/regulator is used for charging control. The hybrid control comprises integral cycle control and pulse width modulation control to cope with the variations in the induced voltage due to clearance and alignment. The hybrid control has good control capability and does not cause severe switching loss. A 22 kW prototype of the Wireless Power Transfer class 4 charging system defined by the Society of Automotive Engineers is constructed and tested to verify the proposal.

Keywords

JRJJC3_2019_v24n4_303_f0001.png 이미지

Fig. 1. Wireless charging system for an electric vehicle.

JRJJC3_2019_v24n4_303_f0002.png 이미지

Fig. 2. Proposed combined rectifier/regulator: (a) circuit diagram, (b) Synchronous rectification control waveforms.

JRJJC3_2019_v24n4_303_f0003.png 이미지

Fig. 3. Operation phases.

JRJJC3_2019_v24n4_303_f0004.png 이미지

Fig. 4. Integral cycle control waveforms.

JRJJC3_2019_v24n4_303_f0005.png 이미지

Fig. 5. PWM control waveforms.

JRJJC3_2019_v24n4_303_f0006.png 이미지

Fig. 6. Hybrid control waveforms.

JRJJC3_2019_v24n4_303_f0007.png 이미지

Fig. 7. Diode rectification and synchronous rectification. Red: Efficiency of diode rectification. Blue: Efficiency of synchronous rectification.

JRJJC3_2019_v24n4_303_f0008.png 이미지

Fig. 8. Synchronous rectification waveforms(distance between coils : 150[mm]). Top(yellow): rec/reg voltage(vAB), 250 V/div. Bottom(blue): rec/reg current(ipk), 100 A/div. Time base: 10μs/div.

JRJJC3_2019_v24n4_303_f0009.png 이미지

Fig. 9. Hybrid control mode 2 waveforms(distance between coils : 150[mm]). Top(yellow): rec/reg voltage(vAB), 250 V/div. Bottom(blue): rec/reg current(ipk), 100 A/div. Time base: 10μs/div.

JRJJC3_2019_v24n4_303_f0010.png 이미지

Fig. 13. Synchronous rectification waveforms(distance between coils : 200[mm]). Top(yellow): rec/reg voltage(vAB), 250 V/div. Bottom(blue): rec/reg current(ipk), 100 A/div. Time base: 10μs/div.

JRJJC3_2019_v24n4_303_f0011.png 이미지

Fig. 14. Hybrid control mode 3 waveforms(distance between coils : 200[mm]). Top(yellow): rec/reg voltage(vAB), 250 V/div. Bottom(blue): rec/reg current(ipk), 100 A/div. Time base: 10μs/div.

JRJJC3_2019_v24n4_303_f0012.png 이미지

Fig. 10. Hybrid control mode 3 waveforms(distance between coils : 150[mm]). Top(yellow): rec/reg voltage(vAB), 250 V/div. Bottom(blue): rec/reg current(ipk), 100 A/div. Time base: 10μs/div.

JRJJC3_2019_v24n4_303_f0013.png 이미지

Fig. 11. Misalignment coils(horizontal and vertical : 100[mm]).

JRJJC3_2019_v24n4_303_f0014.png 이미지

Fig. 12. Hybrid control mode 2 waveforms(horizontal and vertical misalignment : 100[mm]). Top(yellow): rec/reg voltage(vAB), 250 V/div. Bottom(blue): rec/reg current(ipk), 100 A/div. Time base: 10μs/div.

TABLE Ⅰ STATE TRANSITION OF INTEGRAL CYCLE CONTROL

JRJJC3_2019_v24n4_303_t0001.png 이미지

TABLE Ⅱ COMPOSITION OF HYBRID CONTROL MODE

JRJJC3_2019_v24n4_303_t0002.png 이미지

References

  1. K. Hatanaka, F. Sato, et al., “Power transmission of a desk with a cord-free power supply,” IEEE Trans. Magnetics, Vol. 38, No. 5, pp. 3329-3331, 2002. https://doi.org/10.1109/TMAG.2002.803120
  2. J. Wang, S. L. Ho, W. N. Fu, and M. Sun, “Analytical design study a novel witricity charger with lateral and angular misalignments for efficient wireless energy transmission,” IEEE Trans. Magnetics., Vol. 47, No. 10, pp. 2616-2619, 2011. https://doi.org/10.1109/TMAG.2011.2151253
  3. D. N. Lim, D. S. Lee, and S. J. Jeon, "Output characteristics of pickup according to pickup's posture," in Proc. of 8th Conference on National Defence Technology, pp. 824-828, 2012.
  4. C. S. Wang, O. H. Stielau, and G. A. Covic, “Design considerations for a contactless electric vehicle battery charger,” IEEE Trans. Ind. Elec., Vol. 52, No. 5, pp. 1308-1314, 2005. https://doi.org/10.1109/TIE.2005.855672
  5. S. J. Jeon, "2-phase drive for electric vehicle charging," in Proc. of KIEE Summer Conference 2015, pp. 1-2, 2015.
  6. J. Shin, et al., “Design and implementation of shaped magnetic-resonance-based wireless power transfer system for roadway powered moving electric vehicle,” IEEE Trans. Ind. Elect., Vol. 61, No. 2, pp. 1179-1192, 2014. https://doi.org/10.1109/TIE.2013.2258294
  7. D. S. Lee, D. N. Lim, S. J. Jeon, and Y. S. Ko, "Electric yard tractor with furtive charging," in Proc. of Power Electronics Annual Conference, pp. 482- 483, 2014.
  8. J. Heo and S. J. Jeon, "Charging control of wireless charging system," in Proc. of 48th KIEE Summer Conference, pp. 6-7, 2017.
  9. J. Heo, H. H. Shin, S. J. Jeon, W. S. Jung, and J. H. Kim, "Characteristics of WPT 4 coil of wireless charging system for electric vehicle," in Proc. of 50th KIEE Summer Conference, pp. 23-24, 2018.
  10. D. H. Cho, S. J. Jeon, et al., "Method and appartatus for controlling rectification and regulation," Korea Patent 10-1383556-0000, 2014.
  11. M. M. Jovanovic, M. T. Zhang, and F. C. Lee, “Evaluation of synchronous-rectification efficiency improvement limits in forward converter,” IEEE trans. Ind. Elec., Vol. 42, No. 4, pp. 387-395, 1995. https://doi.org/10.1109/41.402478
  12. G. B. Joung, C. T. Rim, and G. H. Cho, "Integral cycle mode control of the series resonant converter," IEEE Tran. Power Elect., Vol. 4, pp. 83-91, 1989. https://doi.org/10.1109/63.21875
  13. M. Afshin and A. K. Rathore, "Receiver side control for efficient inductive power transfer for vehicle recharging," in Proc IEEE Transportation Electrification Conference, pp. 1-6, 2017.
  14. J. Heo, H. H. Shin, S. J. Jeon, and M. T. Huh, "Efficiency comparison of rec/reg of wireless charging system for electric vehicle according to charging control methods," KIEE Summer Conference, pp. 1-2, 2018.
  15. Wolfspeed, "CAS300M12BM2," CREE, pp. 1-9, 2017.
  16. Semikron, "SKM350MB120SCH17," SEMIKRON, pp. 1-7, 2018.
  17. K. Tachikawa, M. Kesler, and O. Atasoy, "Feasibility study of bi-directional wireless charging for vehicleto- grid," SAE Technical Paper, pp. 1-9, 2018.