Figures (15)  Tables (3)

    • Figure 1. 

      Schematic diagram of the ICPT system based on the synchronous three-phase triple-parallel Buck converter.

    • Figure 2. 

      Small-signal model of a synchronous three-phase triple-parallel parallel Buck converter.

    • Figure 3. 

      Norton equivalent schematic diagram of the ICPT system.

    • Figure 4. 

      Principle of current sharing and constant voltage output voltage control of the ICPT system.

    • Figure 5. 

      Flow-sharing constant-voltage closed-loop output control block diagram for the ICPT system.

    • Figure 6. 

      Current loop frequency characteristic simulation curve.

    • Figure 7. 

      Bode diagram before and after system fitting.

    • Figure 8. 

      Open-loop gain Bode diagram of the system with the voltage loop compensation network.

    • Figure 9. 

      Experimental platform of the ICPT system with current sharing and constant voltage output.

    • Figure 10. 

      Drive and output voltage waveforms of the output voltage and the synchronous three-phase triple-parallel Buck converter.

    • Figure 11. 

      Output voltage and inductor current waveforms of the synchronous three-phase triple-parallel Buck converter before and after coupling coefficient variation. (a) Before coupling coefficient variation. (b) After coupling coefficient variation.

    • Figure 12. 

      Output voltage and primary side coil current waveform of the inverter before and after coupling coefficient variation. (a) Before coupling coefficient variation. (b) After coupling coefficient variation.

    • Figure 13. 

      Voltage and current waveform of the secondary side pick-up before and after coupling coefficient variation. (a) Before coupling coefficient variation. (b) After coupling coefficient variation.

    • Figure 14. 

      Drive and output voltage waveforms of the system output voltage and the synchronous three-phase triple-parallel Buck converter.

    • Figure 15. 

      Output voltage and inductance current waveforms of the synchronous three-phase triple-parallel Buck converter under full and half load conditions. (a) Full load. (b) Half load.

    • Parameter Value Parameter Value
      C11/μF 2050 Cpa/μF 0.0762
      L1/μH 77 Cp/μF 0.018
      L2/μH 77 Lp/μH 240
      L3/μH 77 Ls/μH 240
      C1/μF 23.5 Cs/μF 0.0146
      D 0.75 C/μF 68
      f1/kHz 100 R/Ω 27.3
      Lpa/μH 46 k 0.3

      Table 1. 

      Parameters of ICPT system

    • Three-phase Buck circuit Inverter circuit Secondary rectifier circuit
      Mosfet (six)
      CREE-C2M0080120D      		 Mosfet (four)
      CREE-C2M0080120D      		 Diode (six)
      FAIRCHILD-RURG8060

      Table 2. 

      Major components

    • Fault tolerance Switch tube stress Voltage ripple Power density Redundancy Volume Cost
      Single-phase Buck converter No Larger Larger Larger Lower A S
      Three-phase triple-parallel Buck converter Yes Smaller Smaller Smaller Higher < 3A < 3S

      Table 3. 

      Comparison of sign-phase Buck converter and three-phase triple-parallel Buck converter