Fig. 1. Typical operating waveform, output current, current error and tracking error of the BRing dipole-magnet power supply prototype

Fig. 2. Flow chart of ripple and tracking quantification method for the current and ripple quantification method for the magnetic field

Fig. 3. Schematic diagram of constant current excitation and pulse current excitation experiment platform

Fig. 4. Low-frequency drift elimination of normalized magnetic field, and variation of ripple and histograms of normalized magnetic field and excitation current before and after filtering with cut-off frequency of 1.6 kHz

Fig. 5. Repeated testing result of quantification indicators of magnetic field and excitation current ripple under 5 operation mode (low pass filtering with cut-off frequency of 1.6 kHz)

Fig. 6. Current reference waveforms, current error waveforms, and current tracking error waveforms under different PI regulator parameters

Fig. 7. Output current waveforms, current ripple error waveforms under different PI regulator parameters

Fig. 8. Three times the standard deviation of current ripple error and tracking error under different PI regulator parameters