A coil device includes a bobbin, a terminal, and a terminal block. The bobbin includes a winding portion for winding a wire around an outer circumference of the winding portion. The terminal is connectable with an end of the wire. The terminal block holds the terminal. The terminal is movable both in a first axis and a second axis of the bobbin.

The invention comprises a harmonic filter apparatus and method of use thereof for magnetically isolating and filtering individual phases of three-phase power comprising a delta circuit that includes: (1) a first leg connecting to a second leg and a third leg and (2) first circuitry on the first leg matching second circuitry on the second leg, the first circuitry comprising at least two contactors electrically wired in parallel, the harmonic filter magnetically isolating individual phases of three-phase power, where inductor—coupled inductor pairs couple apexes of the delta circuit to individual phases of the three-phase power.

A composite coil device includes a winding shaft portion, a first conductor portion, and a second conductor portion. The winding shaft portion at least partly includes a magnetic body and axially includes a first section and a second section. The first conductor portion is wound continuously in the first section and the second section. The second conductor portion is wound in the second section.

The invention comprises a harmonic filter apparatus and method of use thereof, the harmonic filter including a delta circuit comprising: (1) a first leg connecting a first apex to a second apex of the delta circuit; a second leg connecting the second apex to a third apex of the delta circuit; and a third leg connecting the third apex to the first apex and (2) a first electrical contactor and a second electrical contactor positioned within at least two of: the first leg, the second leg;

and the third leg. Optionally and preferably, each apex of the delta circuit is connected to individual phases of three phase power via respective inductor—coupled inductor pairs, where the harmonic filter magnetically isolates individual phases of the three phase power.

The invention comprises a method for fastening an inductor, comprising an aperture therethrough, to a mounting surface with a set of at least two mechanical straps and a strap force of ten to one hundred pounds of force per strap, the step of fastening further comprising the step of: passing at least a first portion of each of a first and second mechanical strap of the set of mechanical straps through the aperture and on opposing sides of the aperture, the first portion comprising a non-conductive material, where the inductor winding is fabricated during installation and/or the inductor is a component of a harmonic filter magnetically isolating and filtering individual phases of three phase power.

The invention comprises a harmonic filter apparatus and method of use thereof for magnetically isolating and filtering individual phases of three-phase power comprising a delta circuit that includes: (1) a first leg connecting to a second leg and a third leg and (2) first circuitry on the first leg matching second circuitry on the second leg, the first circuitry comprising at least two contactors electrically wired in parallel, the harmonic filter magnetically isolating individual phases of three-phase power, where inductor—coupled inductor pairs couple apexes of the delta circuit to individual phases of the three-phase power.

The invention comprises a fabricated inductor winding apparatus and method of use/manufacture thereof, where the inductor has a core and a fabricated winding. The fabricated winding comprises a plurality of turns, a first turn of the plurality of turns comprising a first sub-section and a second sub-section, the first sub-section electrically connected to the second sub-section with a first non-wire electrical connection during an assembly step of the inductor and the second sub-section of the first turn electrically connected to a second turn with a second electrical connection formed during a winding step.

The invention comprises a harmonic filter apparatus and method of use thereof, the harmonic filter including a delta circuit comprising: (1) a first leg connecting a first apex to a second apex of the delta circuit; a second leg connecting the second apex to a third apex of the delta circuit; and a third leg connecting the third apex to the first apex and (2) a first capacitor and a second capacitor wired in parallel within the first leg of the delta circuit. Optionally and preferably, each apex of the delta circuit is connected to individual phases of three phase power via respective inductor—coupled inductor pairs, where the harmonic filter magnetically isolates individual phases of the three phase power.

The invention comprises a multi-inductor mounting/cooling apparatus and method of use thereof comprising: an elongated tube having a first elongated section and a second elongated section separated by at least a first longitudinal split down a length of the elongated tube and at least three inductors affixed to a baseplate, the at least three inductors positioned within the elongated tube, the at least three inductors comprising a plurality of connectors extending radially outward through at least one aperture formed between the first elongated section and the second elongated section. Optionally and preferably a fan is positioned within and/or at an end of the elongated tube.

A reactor includes a coil; a magnetic core with an inner core portion arranged inside the coil; and an inwardly interposed member insulating the coil from the inner core portion. The inwardly interposed member has a thin portion defined by a recess of an inner-circumferential surface, and a thick portion that is thicker than the thin portion. The inner core portion has, on an outer circumferential surface facing the inwardly interposed member, a core-side projection portion has a shape conforming to the inner-circumferential surface shape of the thin portion. The thin portion has a thickness of 0.2 mm to 1.0 mm inclusive, and the thick portion has a thickness of 1.1 mm to 2.5 mm inclusive. The inner core portion and the inwardly interposed member are in intimate contact with each other, and the inwardly interposed member and the wound portion are in intimate contact with each other.