Real-Time Frequency Adaptive Tracking Control of the WPT System Based on Apparent Power Detection

Table 3

The summary of various indices for frequency tracking methods.

Reference	Method	Adjustment time (ms)	Resonant frequency (kHz)	Efficiency improvement (%)	Complexity	Maximum efficiency, (%)
Zheng et al. [16]	AFTC	∼300	85	3.6∼4	Medium	86.9
Hu et al. [17]	VFPS	Not mentioned	85	∼4	High	>91
Kim et al. [18]	PFM	2000	90	Not mentioned	High	∼91
Nasr et al. [20]	DCS	∼11	767	∼8	High	88
Hua et al. [21]	APFM	Not mentioned	200	2.5	High	86.4
Matsuura et al. [26]	PFM (simulation)	Not mentioned	85	Not mentioned	High	85
Yang et al. [27]	PFM	∼200	37∼161.2	2.3	Medium	∼70
This paper	AFTC	<1	100	4∼5	Medium	91