A motor includes a wire support member that includes a wire holding portion that holds one portion of coil lead wires among the coil lead wires extending upward from a coil, a first conducting member that electrically connects the other portion of the coil lead wires to each other, and a main body portion that supports the wire holding portion and a first conducting member, a bus bar unit includes a second conducting member connected to the coil lead wire held by the wire holding portion, and a bus bar holder that holds the second conducting member, and a bearing holder includes a through-hole which penetrates the bearing holder in an axial direction and through which a coil end of the coil lead wire or the second conducting member passes.

Disclosed in one embodiment is a busbar comprising: an insulating body; a plurality of neutral terminals arranged in the insulating body; and a plurality of first driving terminals, second driving terminals, and third driving terminals arranged in the insulating body, wherein the plurality of neutral terminals, first driving terminals, second driving terminals, and third driving terminals are electrically insulated, respectively, and the shape of the plurality of the first driving terminals, the second driving terminals, and the third driving terminals are the same.

All electric motor unit includes an electric motor and a connection module. The electric motor includes motor coils, a stator and a rotor. The electrical connection module includes a power feed bus bar and a neutral bus bar. The power feed bus bar includes power feed collars for each phase, in which terminal portions for each phase are arranged. The neutral bus bar includes a neutral collar in which neutral terminal portions are arranged. When viewed in a direction intersecting with a second cross section, which intersects with a first cross section containing all the neutral terminal portions, the minimum distance between a second cross-section neutral terminal row on the second cross section and a second cross-section power feed terminal row on the second cross section is greater than zero.

Provided are: a back yoke portion formed in an annular shape; a plurality of tooth portions arranged annularly on an inner periphery of the back yoke portion and forming a plurality of slots that are spaced apart in a circumferential direction and open on an outer peripheral side, the plurality of tooth portions being fitted to an inner peripheral surface of the back yoke portion; a coil housed in the plurality of slots; and a wedge disposed between the coil and the back yoke portion, at an opening of each of the plurality of slots.

Electric compressor 1 has electric motor 10 housed in casing 40, the motor including stator 2 having yoke portion 2a and plural tooth portions 2b, and rotor 3 disposed radially inside stator 2. Protrusion 41f protrudes at plural circumferential positions of inner periphery 41a1 of casing 40, which has protruding end surface 41f1 contacting an outer periphery of yoke portion 2a with width larger than tooth portion 2b. Contact tooth back portion 2a11 contacts protruding end surface 41f1, out of plural tooth back portions 2a1 each disposed behind tooth portion 2b as part of the outer periphery of yoke portion 2a, is formed in a region except both edge portions 41h of protruding end surface 41f1 in a circumferential direction within a circumferential angle range θ in which the protruding end surface 41f1 is located.

Methods of passively sampling PFAS in the environment, PFAS sorbents, apparatus and systems (apparatus plus conditions) for sampling groundwater, porewater, and surface water are described.

A coil-connecting method according to an embodiment includes: preparing a metal sleeve having a circular shape when viewed from an axial direction; processing the metal sleeve such that the metal sleeve has a non-circular shape when viewed from the axial direction, thereby obtaining a deformed sleeve; inserting a plurality of coils into the deformed sleeve, aligning the plurality of the coils by the deformed sleeve; and swaging the deformed sleeve after the plurality of the coils are inserted into the deformed sleeve, thereby connecting the deformed sleeve and the plurality of the coils together.

An insulator according to an embodiment is attached to teeth extending from one side surface in a radial direction of a ring-shaped stator core in the radial direction. The insulator ensures insulation between the teeth and a rectangular wire wound around the teeth with a number of windings. The insulator includes an end-surface cover portion, two side-surface cover portions, a first wall portion, a second wall portion, a protruding-stripe portion, and a recess. The end-surface cover portion covers an end surface of the teeth in an axial direction. The two side-surface cover portions cover both side surfaces of the teeth in a circumferential direction. At one side-surface cover portion of the two side-surface cover portions, a first winding of the rectangular wire is disposed, the rectangular wire is wound around the teeth with a number of windings, and the protruding-stripe portion and the recess are formed.

A stator of an electrical machine including stator windings, a stator insulator, connectors, and a printed circuit board. Each of the stator windings is wound by magnet wire on a stator lamination core such that the stator has a plurality of magnet wires. The stator insulator is formed of an insulative material and has a ring structure and connector receivers. The connectors include legs such that the legs of each connector are coupled to a corresponding one of the connector receivers by snap-fit engagement. Each of the connectors electrically connects to single or multiple magnet wires. The printed circuit board is coupled to an input power line and is electrically connected to each of the connectors such that the printed circuit board is electrically connected to the magnet wire of each of the stator windings.

A bus bar guide is provided to fix bus bars that connect a plurality of coils disposed in a motor. The bus bar includes a conductor that has a plate shape and has a first surface and a second surface continuous with the first surface. The bus bar guide is configured by annularly arranging a plurality of bus bar guide pieces each including an insulator. Each of the plurality of bus bar guide pieces is provided with a groove that holds the first surface of the bus bar and positions the bus bar.