Research on Modelling and Stability Characteristics of Electric Traffic Energy System Based on ZVS-DAB Converter

Table 1

Performance comparison between DAB converter and LLC resonant converter.

Parameter	DAB	LLC
External capacitor	No (small volume)	Yes (large volume)
Voltage controllability	High	Low
Total ZVS	Yes	Yes
Secondary side ZCS	No	Yes
Parallel current-sharing	Easy	Difficult
Antimagnetic saturation	Software	Hardware
Current stress	Lower	Higher
Suppression of DC second harmonic	Yes	No
Control points	PI voltage closed loop, antimagnetic saturation	Power switching, load sharing