Fig. 1. AC-Link^TM topology

Fig. 2. AC-Link^TM current waveform

Fig. 3. Series resonant buck-boost topology

Fig. 4. Operating modes

Fig. 5. Waveform without auxiliary commutation

Fig. 6. Switch control signal

Fig. 7. State-plane diagram

Fig. 8. Low line voltage, high line voltage and equivalent excitation voltage

Fig. 9. Three-phase input current and output voltage waveforms

Fig. 10. Input power factor

Fig. 11. Waveforms of resonant circuit