Fig. 1. Circuit diagram of FTD magnet coil power supply (PS)

Fig. 2. Hardware schematic diagram of the FTD magnet coil PS

Fig. 3. Prototype of DC power unit in FTD magnet coil PS

Fig. 4. Circuit diagram of DC bus capacitor bank

Fig. 5. Circuit topology and equivalent schematic of the H-bridge inverter in FTD magnet coil PS

Fig. 6. Flow chart of control process for amplitude and frequency of coil current

Fig. 7. Output current, primary and secondary voltage of transformer when the power supply is in 10 Hz modulation mode

Fig. 8. Output current, H-bridge voltage and resonant voltage when the power supply is in 110 Hz resonant mode

Fig. 9. Output current, H-bridge voltage and resonant voltage when the power supply is in 1.3 kHz resonant mode