237 to be supported within the e-machine cavity 233. In some embodiments, the interior surface 237 may include features that define flow channels for the fluid system 102 as will be discussed.

Furthermore, proximate the second end 245, the e-machine housing 231 may include at least one passthrough aperture 265 (FIGS. 2 and 6). There may be a plurality of passthrough apertures 265 arranged angularly about the axis 212. The passthrough apertures 265 may be holes, openings, or other apertures that extend between and that fluidly connect the e-machine cavity 233 and the compressor housing 260.

As shown in FIG. 3, the e-machine 270 may include a stator bobbin 402 of the stator member 272. The stator bobbin 402 may be spool-shaped, cylindrical and hollow so as to accommodate the rotor member 274 (FIG. 2). Accordingly, the stator bobbin 402 may include an inner radial portion 408, an outer radial portion 410, a first end 412, and a second end 414. The stator bobbin 402 may include a plurality of winding supports 406 (i.e., teeth) that are arranged in an annular arrangement about the axis 212. As shown in FIG. 4, there may be six (6) winding supports 406; however, it will be appreciated that the number of winding supports 406 may differ without departing from the scope of the present disclosure. The winding supports 406 may be joined at the outer radial portion 410 as shown in FIG. 4. Also, the stator bobbin 402 may include slots 415 between neighboring ones of the winding supports 406 on the inner radial portion 408. The slots 415 may extend along the inner radial portion 408 and along the axis 212. As shown in the cross-sectional view of FIG. 4, the winding supports 406 may also have an intermediate portion 407 included radially between the inner radial portion 408 and the outer radial portion 410. The intermediate portion 407 may have a narrower width (measured in the circumferential direction about the axis 212) than at the inner radial portion 408. Accordingly, the outer radial portion 410 may be substantially annular, and the intermediate portion 407 of the winding supports 406 may project inwardly radially toward the axis 212. At the inner radial portion 410, the winding supports 406 may be wider such that the cross-sectional profile is substantially T-shaped (FIG. 4).

The stator member 272 may further include a plurality of windings 416. The windings 416 may include a plurality of wires, etc. that are wound about the winding supports 406. The windings 416 may be wound about the intermediate portions 407 of the winding supports 406. The slots 415 may provide passage for the wires as the windings 416 are wound on the winding supports 406 during manufacture. Also, the windings 416 may include respective ends 418 (FIGS. 2 and 3) that extend away from the winding supports 406. In some embodiments, the ends 418 may be disposed at the first end 412 of the stator bobbin 402 and may extend away therefrom.

Furthermore, as shown in FIG. 2, the bobbin 402 may include, comprise, and/or may be defined by a metallic inner member 420 (i.e., a first member) and a non-metallic outer member 422 (i.e., a second member, covering member, etc.). In some embodiments, the outer member 422 may be constructed from a polymeric material or other material that is more electrically insulative than the inner member 420. Furthermore, the inner member 420 may comprise a plurality of thin laminations that are stacked along the axis 212. Additionally, in some embodiments, the outer member 422 may be over-molded onto the inner member 420 in an insert-molding process during manufacture. In other embodiments, the bobbin 402 may be additively manufactured, for example, in a 3-D printing process. The inner member 420 may be somewhat annular, hollow, and cylindrical in shape and centered about the axis 212. The inner member 420 may be axially disposed between the first end 412 and the second end 414 of the stator member 272. The outer member 422 may also be somewhat annular, hollow, and cylindrical in shape and centered about the axis 212. The outer member 422 may extend axially away from the inner member 420 to define the first end 412 of the stator bobbin 402. Also, the outer member 422 may extend axially away from the inner member 420 to define the second end 414 of the stator bobbin 402. The inner member 420 and the outer member 422 may cooperatively define the inner radial portion 408 and the outer radial portion 410. Portions of the outer member 422 may also pass through holes and/or other apertures of the inner member 420 to thereby attach the inner and outer members 420, 422 of the stator bobbin 402. Thus, the outer member 422 and the inner member 420 may cooperatively define the stator bobbin 402, including the plurality of winding supports 406. The outer member 422 and the inner member 420 may cooperatively define an outer diameter surface 440 of the stator bobbin 402, which faces outward radially from the axis 212.

In some embodiments, the stator bobbin 402 may include at least one winding retainer 475 (FIGS. 3, 5, and 6). In some embodiments, the winding retainer 475 may include at least one circumferential routing portion, such as a groove 477, that extends circumferentially about the axis 212 on the outer diameter surface 440 of the stator bobbin 402. The outer member 422 may define three grooves 477 at the first end 412 of the stator bobbin 402 as shown in the illustrated embodiments. The grooves 477 may receive respective ones of the wire ends 418 of the windings 416. Thus, the ends 418 may be routed and retained securely and conveniently within the grooves 477. Furthermore, the winding retainer 475 may also include at least one terminal clasp 479 (FIGS. 3 and 5). There may be three clasps 479 as shown, and the clasps 479 may project axially from the first end 412 of the stator bobbin 402. The clasps 479 may include a respective opening 481 on the outer diameter surface 440, and the opening 481 may receive a respective terminal end 419 of the wire ends 418. Thus, the clasp 479 may securely and conveniently retain and direct the terminal end 419 away from the first end 412 of the stator bobbin 402 for attachment to the control system 220 (FIG. 2).

The stator member 272 may further include an end fluid deflector member 502. The end fluid deflector member 502 may be a thin plate with a substantially constant thickness. The end fluid deflector member 502 may include a cover plate