Research on the Comparison Analyses of Three-Phase Discrete and Integrated LC Filters in Three-Phase PV Inverter

Table 2

The comparison of the discrete magnetics, five-limb magnetics, and three-limb magnetics.

	The number of magnetic core	The cross section area of middle limb	Air gap distribution	Inductance	The number of turns	The max flux density
Discrete filter inductor	Three EE96/48/32	1024 mm^2	The air gap of middle limb is 2.0 mm; the air gaps of the other limbs are zero	Self-inductance is 3.8 mH	80	0.33 T
Integrated filter inductor (five limbs)	Two EE96/48/32	1024 mm^2	The air gaps of middle three limbs are 2.0 mm; the air gaps of the other two limbs are zero	Self-inductance is 3.8 mH	80	0.33 T
Integrated filter inductor (three limbs)	One EE96/48/32	1024 mm^2	The air gap of middle limb is 1.4 mm; the air gaps of the other limbs are 0.7 mm	Self-inductance is 3.8 mH; mutual inductance is 1.9 mH	80	Middle limb is 0.17 T; the other two limbs are 0.33 T