A Framework of Multilayer Multiphase Interleaved Converter for Electric Vehicle Based on Graph Theory

Table 5

Typical equalization device comparison.

Topology	Component		Voltage stress		Inductor	Transformer	Speed	Scalability	Control
	#S	#D	#S	#D
#1	0	0	0	0	0	0	Low	Easy	Easy
#2	1	n	n  V	V	0	1	Medium	Hard	Hard
#3	n	n	V	V	n − 1	0	Medium	Medium	Hard
#4	2n − 2	0	n  V	V	n − 1	0	High	Easy	Medium

#1: flying-capacitor equalization structure; #2: multioutput winding transformer centralized equalization structure; #3: buck-boost centralized equalization structure; #4: multi-layer multiphase interleaved converter structure; #S: switch; #D: diode.