part to the arrangement of the coils a b c d e f and the connections of the motor lines 16 18 20 to tap terminals 4 5 6 intermediate windings a and d b and e and c and f respectively the inductor 28 is coupled to the asd at terminals 1 2 and 3 and has a plurality of windings a b c d e f each of which have a variable inductance attributable to the inductor 28 being of a passive adaptive type terminals 7 8 9 at the end of windings d e and f respectively connect to resister capacitor couples 30 and 32 34 and 36 and 38 and 40 respectively the polarity of windings a b c with respect to d e f are shown by a dot fig3 shows an inductor 128 that may be utilized in filter 10 of fig2 the inductor 128 has an e shaped core 142 and an i shaped core element 144 both of which may be made from core steel the windings a and d b and e and c and f are disposed around the three arms 142 a 142 b and 142 c of the e shaped core 142 respectively the terminals 1 9 referred to above in fig2 are also shown in fig3 high permeability core gap pieces u201c faps u201d 146 a 146 b 146 c as described in u s patent publication no 20120256719 entitled u201c harmonic mitigation devices and applications thereof u201d to shudarek et al which is incorporated by reference herein for all purposes may be interposed between each of the arms 142 a 142 b 142 c and.