An electric machine, and a cooling system for an electric machine

Abstract

An electric machine includes a stator jacket configured to be located proximate a stator. The stator jacket includes a first inner surface, a second inner surface spaced away from the first inner surface, an end surface extending between the first inner surface and the second inner surface. A cavity is defined by the first inner surface, the second inner surface, and the end surface. A stator jacket body defines a first passageway extending radially through the stator jacket, a first opening and a second opening. The electric machine includes an insert removably positioned within the cavity. The insert includes a plurality of ribs extending between the first inner surface and the second inner surface of the stator jacket. The plurality of ribs defines a plurality of flow channels therebetween. The plurality of flow channels are fluidly coupled to the first passageway.

Description

AN ELECTRIC MACHINE, AND A COOLING SYSTEM FOR ANELECTRIC MACHINECROSS-REFERENCE TO RELATED APPLICATIONS(0001 ] This Application claims the benefit of and priority to U. S. Provisional Application No 63 / 562,430, filed March 7, 2024, which is hereby incorporated by reference herein in its entirety.FIELD

[0002] The present invention relates generally to the field of cooling systems for electric machines.BACKGROUND

[0003] Electric machines include devices that convert electrical energy into mechanical energy or convert mechanical energy into electrical energy. Electric machines may be used in various applications, such as motors generating motion and generators producing electricity. Electric machines operate on the principles of electromagnetic induction. To maintain optimal performance and / or to prevent overheating of components, electric machines are often cooled with fans, liquid coolant, or other cooling mechanisms to dissipate excess heat generated during operation.SUMMARY

[0004] One embodiment relates to an electric machine. The electric machine includes a stator jacket configured to be located proximate a stator. The stator jacket includes a first inner surface, a second inner surface spaced away from the first inner surface, an end surface extending between the first inner surface and the second inner surface, such that a cavity is defined by the first inner surface, the second inner surface, and the end surface, and a stator jacket body. The stator jacket body defines a first passageway extending radially through the stator jacket, a first opening located at a cavity first end of the cavity, substantially opposite the end surface, and asecond opening located at a first passageway first end of the first passageway. The electric machine includes an insert removably positioned within the cavity. The insert includes a plurality of ribs extending between the first inner surface and the second inner surface of the stator jacket. The plurality of ribs defines a plurality of flow channels therebetween. The plurality of flow channels are fluidly coupled to the first passageway.

[0005] Another embodiment relates to an insert for a cooling system. The insert includes a plurality of ribs defining a plurality of flow channels therebetween. The plurality of ribs are spaced apart from each other such that an axial space between adjacent ribs of the plurality of ribs increases towards an axial center of the plurality of ribs. Each of the plurality of ribs defines a first rib end and a second rib end. The insert includes an inlet portion located at the first rib end. The insert includes an outlet portion located at the second rib end. The insert includes an insert wall located between the inlet portion and the outlet portion. The insert wall fluidly separates the inlet portion and the outlet portion.(0006] Still another embodiment relates to a cooling system for an electric machine. The cooling system comprises a stator jacket defines a cavity and a first opening located at a cavity first end of the cavity. The cooling system includes an insert removably positioned within the cavity. The insert includes a plurality of ribs t. The plurality of ribs define a plurality of flow channels therebetween. The cooling system includes an endcap positioned at the first opening and extending at least partially into the cavity, such that the endcap retains the insert within the cavity.BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The details of one or more implementations are set forth in the accompanying drawings and the description below. Other features, aspects, and advantages of the disclosure will become apparent from the description, the drawings, and the claims.

[0008] FIG. l is a side sectional view of a portion of an electric machine, according to an example embodiment.[0009| FIG. 2 is a perspective view of a cooling system for the electric machine of FIG. 1, shown in a disassembled state.

[0010] FIG. 3 is a perspective view of an insert for the cooling system of FIG. 2.

[0011] FIG. 4 is a side view of a portion of the insert of FIG. 3.

[0012] FIG. 5 is a side sectional view of a portion of the cooling system of FIG. 2.

[0013] FIG. 6 is a perspective sectional view of a portion of the cooling system of FIG. 2.DETAILED DESCRIPTION

[0014] Following below are more detailed descriptions of various concepts related to, and implementations of a cooling system for an electric machine. The systems introduced herein may be implemented in various ways, as the described concepts are not limited to any particular manner of implementation. Examples of specific implementations and applications are provided primarily for illustrative purposes.

[0015] Before turning to the figures, various embodiments of the electric machine and the components thereof, such as the cooling system, are described herein. It should be understood that, while individual components are described in detail, the details should be considered as examples only. Further, the details may include variations described herein. Accordingly, it should be understood that, although individual components may be described relative to an embodiment, any of the components may be used in any other embodiment described herein, unless otherwise noted.

[0016] Embodiments described herein relate generally to an electric machine and components thereof. According to various embodiments, the electric machine includes one or more components configured to facilitate cooling the electric machine. The one or more components configured to facilitate cooling the electric machine cooperate to define a cooling system. The cooling system can be provided on or in a portion of the electric machine. The cooling systemfacilitates transferring thermal energy from the electric machine to a fluid, such as a coolant. In some embodiments, the cooling assembly includes the fluid. In this way, the cooling assembly can advantageously reduce the temperature of the electric machine.

[0017] Figure 1 depicts a portion of an electric machine 100. In some embodiments, the electric machine 100 can be or include a motor generator configured to generate motion. In some embodiments, the electric machine 100 can be or include a device configured to generate electricity.[0018| In some embodiments, the electric machine 100 includes a stator 110, a rotor 120, an outer cover 130, a stator jacket 140, and a shaft 150. In various embodiments described herein, the electric machine 100 may include more or fewer components. For example, the electric machine 100 may include one or more components defining a cooling system.

[0019] In an example embodiment, one or more of the components of the electric machine 100 may be centered on an axis 152. The electric machine 100 can be centered on the axis 152. For example, the axis 152 extends through a center point of the electric machine 100.

[0020] As used herein, the term “axis” describes a theoretical line extending through the centroid (e.g., center of mass, geometric center, etc.) of an object. The object is centered on the axis. The object is not necessarily cylindrical (e.g., a non-cylindrical shape may be centered on an axis, etc.). Furthermore, the object is not necessarily on the axis (e.g., a centroid of a hollow object may be on the axis, but no portion of the object needs to be on the axis).

[0021] The relative positioning of the components of the electric machine 100 described herein may be described relative to the axis 152. For example, an axial direction is along or substantially parallel to the axis 152. Radial, circumferential, and tangential directions may be relative to a theoretical circle that is centered on the axis 152.

[0022] The stator 110 is a stationary, or substantially stationary, component of the electric machine 100. The stator 110 defines part of an electromagnetic circuit of the electric machine 100. The stator 110 includes a stator core and stator windings. The stator core can be a solid coreor a laminated core. When the stator core is a laminated core, the stator 110 includes a plurality of thin metal sheets (i.e., laminations”) that can reduce energy losses in the electromagnetic circuit. The laminations are stacked together forming a hollow cylinder. The stator windings can be or include coils of insulated wire that are inserted into slots of the stator core. When the electric machine 100 is in operation, the stator windings are connected directly to a power source, such as a battery. The stator windings and the stator core cooperate to define an electromagnet when current is applied.

[0023] The rotor 120 is a rotating component of the electric machine 100. The rotor 120 is located radially inward from the stator 110. The rotor 120 defines a portion of the electromagnetic circuit. A magnetic field generated by the stator induces an opposing magnetic field onto the rotor, thereby causing the rotor to rotate away from the stator field. The rotor 120 is coupled to the shaft 150, such that rotation of the rotor causes rotation of the shaft 150. The shaft 150 may lie on the axis 152.

[0024] The stator jacket 140 is located radially outward from the stator 1 10. The stator jacket 140 is located around the stator 110. In some embodiments, the stator jacket 140 is coupled to the stator 110. The stator jacket 140 is part of or at least partially defines the cooling system for the electric machine 100. The components of the electric machine 100 that define the cooling system are described herein below.

[0025] The outer cover 130 is located around the stator 110, the rotor 120, and the stator jacket 140. More specifically, the outer cover 130 is located at a first axial end and a second axial end of the electric machine 100, such that the outer cover 130 encloses the stator 110, the rotor 120, and the stator jacket 140 at the first axial end and the second axial end. The outer cover 130 is coupled to the stator jacket 140. For example, the outer cover 130 is coupled to the stator jacket 140 by one or more fasteners 132.

[0026] In an example embodiment, the electric machine 100 includes the stator jacket 140. The stator jacket 140 is configured to be located proximate the stator 110. The stator jacket 140 includes a first inner surface 210. The stator jacket 140 includes a second inner surface 212spaced away from the first inner surface 210. The stator jacket 140 includes an end surface 214 extending between the first inner surface 210 and the second inner surface 212, such that a cavity 216 is defined by the first inner surface 210, the second inner surface 212, and the end surface 214. The stator jacket 140 includes a stator jacket body 222. The stator jacket body 222 defines a first passageway 224 extending radially through the stator jacket 140. The stator jacket body 222 defines a first opening 226 located at a cavity first end of the cavity 216, substantially opposite the end surface 214. The stator jacket body 222 defines a second opening 228 located at a first passageway first end of the first passageway 224. The electric machine 100 includes an insert 250 removably positioned within the cavity 216. The insert 250 includes a plurality of ribs 252 extending between the first inner surface 210 and the second inner surface 212 of the stator jacket 140. The plurality of ribs 252 define a plurality of flow channels 254 therebetween. The plurality of flow channels 254 are fluidly coupled to the first passageway 224.

[0027] In some embodiments, the electric machine 100 includes an endcap 280 located at the first opening 226 and extending at least partially into the cavity 216.

[0028] In some embodiments, the cavity 216 is located at a first passageway second end of the first passageway 224, opposite the first passageway first end.10029] In some embodiments, the cavity 216 extends circumferentially within the stator jacket body 222.

[0030] In some embodiments, the first opening 226 is defined through a side surface of the stator jacket body 222. In some embodiments, the second opening 228 is defined through a top surface of the stator jacket body 222.

[0031] In some embodiments, the stator jacket body 222 defines a second passageway (not shown) extending radially through the stator jacket body 222. In some embodiments, the plurality of flow channels 254 are fluidly coupled to the second passageway.

[0032] In some embodiments, the insert 250 includes an inlet portion 260 (shown in FIG. 3) located at a first end of the plurality of ribs 252. In some embodiments, the insert 250 includes anoutlet portion 262 located at a second end of the plurality of ribs 252, such that each of the plurality of ribs 252 extends from the inlet portion 260 to the outlet portion 262. In some embodiments, the insert 250 includes an insert wall 264 located between the inlet portion 260 and the outlet portion 262, such that the insert wall 264 fluidly separates the inlet portion 260 and the outlet portion 262.|0033| In some embodiments, the insert 250 includes one or more support members 257 extending in an axial direction and intersecting each of the plurality of ribs 252.[0034| In another example embodiment, the insert 250 for a cooling system includes the plurality of ribs 252. The plurality of ribs 252 define a plurality of flow channels 254 therebetween. The plurality of ribs 252 are spaced apart from each other such that an axial space between adjacent ribs of the plurality of ribs 252 increases towards an axial center of the plurality of ribs 252. The insert includes the inlet portion 260 located at the first end of the plurality of ribs 252. The insert includes the outlet portion 262 located at the second end of the plurality of ribs 252. The insert 250 includes the insert wall 264 located between the inlet portion 260 and the outlet portion 262.

[0035] In some embodiments, each of the plurality of ribs 252 defines a first rib end 258 and a second rib end 259 spaced away from the first rib end 258 in a circumferential direction.

[0036] In some embodiments, ach of the plurality of ribs 252 extend from the inlet portion 260 to the outlet portion 262 in the circumferential direction.

[0037] In some embodiments, the insert 250 includes one or more support members 257 extending in an axial direction and intersecting each of the plurality of ribs 252.

[0038] In some embodiment, adjacent segments of each rib of the plurality of ribs 252 are angled with respect to each other to form an angled wave pattern.

[0039] In some embodiments, the insert 250 includes a first end wall 255 located at a first axial end of the insert and a second end wall 256 located at a second axial end of the insert 250, opposite the first axial end. The first end wall 255 and the second end wall 256 extend around acircumference of the insert 250, such that the first end wall 255 and the second end wall 256 cooperate to define an internal volume of the insert 250.

[0040] In some embodiments, one or more components of the electric machine 100 cooperate to define a cooling system. Referring to FIG. 2, a perspective view of the cooling system 200 for the electric machine 100 of FIG. 1 is shown in a disassembled state. In some embodiments, the cooling system 200 includes the stator jacket 140 and the insert 250. In some embodiments, the cooling system 200 can also include the endcap 280 and / or a sealing member 288. In some embodiments, each of the components of the cooling system 200 are centered on the axis 152.

[0041] In an example embodiment, the cooling system 200 for the electric machine 100 includes the stator jacket 140. The stator jacket 240 is configured to be located proximate the stator 110. The stator jacket 140 defines the cavity 216 and the first opening 226 located at a cavity first end of the cavity 216. The cooling system 200 includes the insert 250. The insert 250 is removably positioned within the cavity 216. The insert 250 includes the plurality of ribs 252. The plurality of ribs 252 define a plurality of flow channels 254 therebetween. The cooling system 200 includes the endcap 280 positioned at the first opening 226 and extending at least partially into the cavity 216, such that the endcap 280 retains the insert 250 within the cavity 216.100421 In some embodiments, the endcap 280 includes a flange portion 282 located outside the cavity 216 and a plug portion 284 located within the cavity 216. In some embodiments, the flange portion 282 is sized to be larger than the first opening 226. In some embodiments, the plug portion 284 is sized to be smaller than the first opening 226, and the plug portion 284 extends through the first opening 226.

[0043] In some embodiments, the cooling system 200 includes a sealing member 288. In some embodiments, the plug portion 284 defines a channel 286 sized to receive the sealing member therein 288. In some embodiments, the sealing member 288 forms a seal between the channel 286 and the stator jacket 140.

[0044] In some embodiments, the endcap 280 is removably coupled to the stator jacket 140.[0045| Referring to FIG. 1, the stator jacket 140 is located proximate the stator 110. The stator jacket 140 defines a first outer surface 232 (e.g., a “bottom surface”). The first outer surface 232 is located at a first radial end of the stator jacket 140. The first outer surface 232 extends in a circumferential direction at a first outer radius 233. The first outer surface 232 is positioned at the first outer radius 233. The first outer radius 233 is measured from the axis 152 to the first outer surface 232. The first outer surface 232 contacts or is proximate the stator 110.

[0046] The stator jacket 140 defines a second outer surface 234 (e.g., a “top surface”) positioned opposite the first outer surface 232. The second outer surface 234 is located at a second radial end of the stator jacket 140, opposite the first radial end. The second outer surface 234 extends in a circumferential direction at a second outer radius 235. The second outer surface 234 is positioned at the second outer radius 235. The second outer radius 235 is measured from the axis 152 to the first outer surface 232.

[0047] The stator jacket 140 defines the first inner surface 210. The first inner surface 210 extends within the stator jacket body 222 in a circumferential direction at a first inner radius 21 1. The first inner surface 210 is positioned at the first inner radius 211. The first inner radius 211 is measured from the axis 152 to the first inner surface 210. The first inner surface 210 is spaced away from the first outer surface 232. The first inner surface 210 is spaced away from the second outer surface 234. The first inner surface 210 is located between the first outer surface 232 and the second outer surface 234. The first inner surface 210 is located between the first outer surface 232 and the second inner surface 212.10048] The stator jacket 140 defines the second inner surface 212 spaced away from the first inner surface 210. The second inner surface 212 extends within the stator jacket body 222 in a circumferential direction at a second inner radius 213. The second inner surface 212 is positioned at the second inner radius 213. The second inner radius 213 is measured from the axis 152 to the second inner surface 212. The second inner surface 212 is spaced away from the first outer surface 232. The second inner surface 212 is spaced away from the second outer surface 234.The second inner surface 212 is located between the first outer surface 232 and the second outersurface 234. The second inner surface 212 is located between the first inner surface 210 and the second outer surface 234.

[0049] The stator jacket 140 defines a first end surface 236. The first end surface 236 is located at a first axial end of the stator jacket 140. The first end surface 236 extends between the first outer surface 232 and the second outer surface 234. In some embodiments, the first end surface 236 contacts the outer cover 130. In some embodiments, the first end surface 236 is coupled to the outer cover 130.[0050| The stator jacket 140 defines a second end surface 238. The second end surface 238 is located at a second axial end of the stator jacket 140, opposite the first axial end. The second end surface 238 extends between the first outer surface 232 and the second outer surface 234. In some embodiments, a first portion of the second end surface 238 contacts the outer cover 130. In some embodiments, a second portion of the second end surface 238 does not contact the outer cover 130. In some embodiments, the second end surface 238 is coupled to the outer cover 130.

[0051] The stator jacket 140 defines the end surface 214 (e.g., an inner end surface). The end surface 214 extends between the first inner surface 210 and the second inner surface 212. The end surface 214 extends axially within the stator jacket body 222 between the first inner surface 210 and the second inner surface 212. The end surface 214 is located between the first end surface 236 and the second end surface 238. The first inner surface 210, the second inner surface 212, and the end surface 214 cooperate to define the cavity 216.

[0052] The stator jacket 140 includes the stator jacket body 222. The stator jacket body 222 defines the first passageway 224. The first passageway 224 extends radially through the stator jacket 140. The first passageway 224 extends through the second outer surface 234. For example, the stator jacket body 222 defines the second opening 228 located at a first passageway first end of the first passageway 224. The second opening 228 may be defined through the second outer surface 234. In this way, the first passageway 224 extends through the second outer surface 234. The first passageway 224 extends to the cavity 216. The first passageway 224 enables fluid communication between a fluid source (e.g., a fluid reservoir, a fluid pump, a fluid heatexchanger, etc.) and the cavity 216. In some embodiments, the first opening 226 is sized to receive the insert 250. For example, the stator jacket 140 may receive the insert 250 via the first opening 226 such that the insert 250 is located within the cavity 216.

[0053] In some embodiments, the stator jacket body 222 defines a second passageway (not shown) that is substantially similar to or the same as the first passageway 224. For example, the second passageway may extend radially through the stator jacket 140. The stator jacket body 222 defines a third opening (not shown) located at a second passageway first end of the second passageway, such that the second passageway extends through the second outer surface 234. The second passageway may enable fluid communication between the fluid source and the cavity 216. In some embodiments, the first passageway 224 is spaced away from the second passageway, such that the first passageway 224 enables fluid communication between the fluid source and a first portion of the cavity 216, and the second passageway enables fluid communication between the fluid source and a second portion of the cavity 216.

[0054] In some embodiments, the stator jacket body 222 defines the cavity 216. For example, the stator jacket body 222 can define the first inner surface 210, the second inner surface 212, and the end surface 214 to define the cavity 216.

[0055] The stator jacket body 222 defines the first opening 226 located at the cavity first end of the cavity 216. The first opening 226 is located substantially opposite the end surface 214. The first opening 226 may be defined through the second end surface 238. The first opening 226 is sized to receive at least a portion of the endcap 280.

[0056] The cooling system 200 includes the insert 250. The insert 250 is removably located within the cavity 216. The first inner surface 210 is spaced away from the second inner surface 212, and the end surface 214 is spaced away from the second end surface 238, such that the cavity 216 is sized to receive the insert 250 therein. The insert 250 has a disc shape. The insert 250 extends circumferentially within the cavity 216.(0057| The insert 250 includes the plurality of ribs 252. Each rib of the plurality of ribs 252 extends between the first inner surface 210 and the second inner surface 212 of the stator jacket 140. As shown in FIG. 3, each rib of the plurality of ribs 252 extends in a circumferential direction from the first rib end 258 to the second rib end 259. The plurality of ribs 252 define the first rib end 258 and the second rib end 259. For example, the first rib end 258 is positioned at a first circumferential end of the plurality of ribs 252, and the second rib end is positioned at a second circumferential end of the plurality of ribs 252. The first rib end 258 is spaced away from the second rib end 259 in a circumferential direction. That is, the first circumferential end is spaced away from the second circumferential end in the circumferential direction.|0058| As shown in FIG. 4, the ribs 252 are spaced apart from each other in an axial direction. Each adjacent pair of ribs 252 defines a flow channel 254 therebetween. More specifically, the flow channels 254 are defined by the axial space between the ribs 252 and the radial space between the first inner surface 210 and the second inner surface 212.(0059] In some embodiments, and as shown in FIG. 4, the ribs 252 form a pattern. In the embodiment shown in FIG. 4, the pattern is an angled wave pattern where adjacent segments of each rib of the plurality of ribs 252 are angled with respect to each other. In other embodiments, the ribs 252 may have a different pattern, such as a smooth wave pattern where adjacent segments of each rib of the plurality of ribs 252 are curved with respect to each other, or other suitable pattern.(0060] In some embodiments, at least one rib 252 of the plurality of ribs 252 is an end rib. The end rib is located at an axial end of the insert 250. In some embodiments, the insert 250 includes two end ribs. For example, the insert includes a first end rib located at a first axial end of the insert 250 and a second end rib located at a second axial end of the insert 250, opposite the first axial end.

[0061] In some embodiments, the insert 250 includes the first end wall 255 and the second end wall 256. The first end wall 255 is located at the first axial end of the insert 250. The second end wall is located at the second axial end of the insert 250, opposite the first axial end. The first endwall 255 and the second end wall 256 extend around the circumference of the insert 250. The first end wall 255 and the second end wall 256 each extend radially between the first inner surface 210 and the second inner surface 212. In this way, the first end wall 255 and the second end wall 256 cooperate to define, at least partially, an internal volume of the insert 250.

[0062] In some embodiments, the axial space between the ribs 252 is uniform. In other embodiments, and as shown in FIG. 4, the axial space between the ribs 252 is not uniform. In an example embodiment, the ribs 252 may be spaced apart from each other such that the axial space between adjacent ribs of the plurality of ribs 252 increases towards the center (e.g., an axial center) of the insert 250 or the center (e.g., axial center) of the plurality of ribs 252. For example, the first three ribs of the insert 250 are spaced apart from each other such that a first rib (e.g., an end rib) is spaced away from a second rib at a first axial distance, and the second rib is spaced away from the third rib at second axial distance, greater than the first axial distance. Thus, the flow channels 254 proximate the axial ends of the insert 250 have a smaller axial width than the flow channels 254 proximate the axial center of the insert 250. The flow channels 254 proximate the axial ends of the insert 250 have relatively smaller axial widths. The flow channels 254 proximate the axial center of the insert 250 have relatively larger axial widths. The flow channels 254 between the axial center and the axial ends of the insert 250 have axial widths between the relatively smaller axial widths and the relatively larger axial widths.

[0063] In some embodiments, the insert 250 includes the one or more support members 257 (e.g., rods, rails, etc.). The support members 257 extend in an axial direction. The support members 257 intersect each of the ribs 252. The support members 257 extend axially through the flow channels 254, but do not substantially prevent the flow of fluid therethrough. In some embodiments, the support members 257 can be coupled to the ribs 252. In other embodiments, the support members 257 can be monolithically formed with the ribs 252. In either embodiment, the support members 257 couple the ribs 252 to each other. In this way, the support members 257 provide structural support for the insert 250. The insert 250 can include a plurality of support members 257. For example, the insert can include at least a first support member locatedproximate the first rib end 258 and a second support member located proximate the second rib end 259.

[0064] Referring to FIG. 3, in some embodiments, the insert 250 includes the inlet portion 260. The inlet portion 260 is located at the first rib end 258. In some embodiments, the insert 250 includes an outlet portion 262. The outlet portion 262 is located at the second rib end 259. Each of the plurality of ribs 252 extends from the inlet portion 260 to the outlet portion 262. In some embodiments, the insert 250 includes an insert wall 264 located between the inlet portion 260 and the outlet portion 262. The insert wall 264 extends between first inner surface 210 and the second inner surface 212, such that the insert wall 264 fluidly separates the inlet portion 260 and the outlet portion 262.|0065| In an example embodiment, the inlet portion 260 is defined between the insert wall 264, the first end wall 255, the second end wall 256, and the first rib end 258. The inlet portion 260 may be fluidly coupled to (e.g., in fluid communication with) at least one of the first passageway 224 or the second passageway. More specifically, the inlet portion 260 may receive a fluid from the first passageway 224 or the second passageway. The inlet portion 260 may direct the fluid to flow into the flow channels 254 at the first rib end 258. In this way, the plurality of flow channels 254 are fluidly coupled to the first passageway 224 or the second passageway (e.g., via the inlet portion 260).

[0066] In another example embodiment, the outlet portion 262 is defined between the insert wall 264, the first end wall 255, the second end wall 256, and the second rib end 259. The outlet portion 262 may be fluidly coupled to (e.g., in fluid communication with) at least one of the first passageway 224 or the second passageway. More specifically, the outlet portion 262 may provide the fluid to the first passageway 224 or the second passageway. The outlet portion 262 may direct the fluid to flow from the flow channels 254 at the second rib end 259 to the first passageway 224 or the second passageway. In this way, the plurality of flow channels 254 are fluidly coupled to the first passageway 224 or the second passageway (e.g., via the outlet portion 262).[0067| Referring now to FIGS. 5 and 6, various views of a portion of the cooling system 200 are shown, according to an example embodiment. In particular, FIG. 5 is a side sectional view of a portion of the cooling system 200, and FIG. 6 is a perspective sectional view of a portion of the cooling system 200.

[0068] The cooling system 200 includes the endcap 280. The endcap 280 is located at the first opening 226. The endcap 280 extends at least partially into the cavity 216. The endcap 280 may be removably coupled to the stator jacket 140. When the endcap 280 is coupled to the stator jacket 140, the endcap 280 retains the insert 250 within the cavity 216. Thus, the endcap 280 may be separated from the stator jacket 140 such that the insert 250 can be removed from the cavity 216. Advantageously, the removable endcap 280 and insert 250 allows servicing or replacement of the insert 250. The endcap 280 includes the flange portion 282 and the plug portion 284.

[0069] The flange portion 282 is located outside the cavity 216. The flange portion 282 contacts the second end surface 238 of the stator jacket 140. The flange portion 282 is sized to be larger than the first opening 226 such that the flange portion 282 is substantially prevented entering the cavity 216.

[0070] The plug portion 284 is located substantially within the cavity 216. The plug portion 284 extends axially away from the flange portion 282 and into the cavity 216. The plug portion 284 is sized to be smaller than the first opening 226, such that the plug portion 284 extends through the first opening 226 and into the cavity 216.

[0071] In some embodiments, the plug portion 284 defines one or more channels 286. In the embodiment shown in FIGS. 5 and 6, the plug portion defines two channels 286 (e.g., a first channel and a second channel). It should be understood that, in other embodiments, the plug portion 284 may define more or fewer channels 286 (e.g., at least one). The channels 286 are each sized to receive a sealing member 288 therein. The sealing member 288 forms a seal between the channel 286 and the stator jacket 140.[0072| The cooling system 200 may include one or more sealing members 288. For example, the cooling system 200 may include a corresponding sealing member 288 for each channel 286 of the endcap 280. For example, a first sealing member 288 may be positioned in a first channel 286 and configured to form a seal between the first channel 286 and the first inner surface 210. A second sealing member 288 may be positioned in a second channel 286 and configured to form a seal between the first channel 286 and the second inner surface 212. The seals formed by each of the one or more sealing members 288 are configured to substantially prevent a fluid from flowing out of the cavity 216 through the first opening 226.

[0073] While this specification contains many specific implementation details, these should not be construed as limitations on the scope of what may be claimed but rather as descriptions of features specific to particular implementations. Certain features described in this specification in the context of separate implementations can also be implemented in combination in a single implementation. Conversely, various features described in the context of a single implementation can also be implemented in multiple implementations separately or in any suitable subcombination. Moreover, although features may be described as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can, in some cases, be excised from the combination, and the claimed combination may be directed to a subcombination or variation of a subcombination.

[0074] As utilized herein, the terms “generally,” “substantially,” “similarly,” and similar terms are intended to have a broad meaning in harmony with the common and accepted usage by those of ordinary skill in the art to which the subject matter of this disclosure pertains. It should be understood by those of skill in the art who review this disclosure that these terms are intended to allow a description of certain features described and claimed without restricting the scope of these features to the precise numerical ranges provided. Accordingly, these terms should be interpreted as indicating that insubstantial or inconsequential modifications or alterations of the subject matter described and claimed are considered to be within the scope of the disclosure as recited in the appended claims.[0075| The term “coupled” and the like, as used herein, mean the joining of two components directly or indirectly to one another. Such joining may be stationary (e.g., permanent) or moveable (e.g., removable or releasable). Such joining may be achieved with the two components or the two components and any additional intermediate components being integrally formed as a single unitary body with one another, with the two components, or with the two components and any additional intermediate components being attached to one another.

[0076] It is important to note that the construction and arrangement of the various systems shown in the various example implementations is illustrative only and not restrictive in character. All changes and modifications that come within the spirit and / or scope of the described implementations are desired to be protected. It should be understood that some features may not be necessary, and implementations lacking the various features may be contemplated as within the scope of the disclosure, the scope being defined by the claims that follow. When the language “a portion” is used, the item can include a portion and / or the entire item unless specifically stated to the contrary.

Claims

WHAT IS CLAIMED IS:

1. An electric machine comprising: a stator jacket configured to be located proximate a stator, the stator jacket comprising: a first inner surface, a second inner surface spaced away from the first inner surface, an end surface extending between the first inner surface and the second inner surface, such that a cavity is defined by the first inner surface, the second inner surface, and the end surface, and a stator jacket body defining a first passageway extending radially through the stator jacket, a first opening located at a cavity first end of the cavity, substantially opposite the end surface, and a second opening located at a first passageway first end of the first passageway; and an insert removably positioned within the cavity, the insert comprising a plurality of ribs extending between the first inner surface and the second inner surface of the stator jacket, the plurality of ribs defining a plurality of flow channels therebetween, the plurality of flow channels fluidly coupled to the first passageway.

2. The electric machine of claim 1, further comprising an endcap located at the first opening and extending at least partially into the cavity.

3. The electric machine of claim 1, wherein the cavity is located at a first passageway second end of the first passageway, opposite the first passageway first end.

4. The electric machine of claim 1, wherein the cavity extends circumferentially within the stator jacket body.

5. The electric machine of claim 1, wherein the first opening is defined through a side surface of the stator jacket body and the second opening is defined through a top surface of the stator jacket body.

6. The electric machine of claim 1, wherein the stator jacket body defines a second passageway extending radially through the stator jacket body; wherein the plurality of flow channels are fluidly coupled to the second passageway.

7. The electric machine of claim 1, wherein the insert further comprises: an inlet portion located at a first end of the plurality of ribs; an outlet portion located at a second end of the plurality of ribs, such that each of the plurality of ribs extends from the inlet portion to the outlet portion; and an insert wall located between the inlet portion and the outlet portion, such that the insert wall fluidly separates the inlet portion and the outlet portion.

8. The electric machine of claim 1, wherein the insert further comprises one or more support members extending in an axial direction and intersecting each of the plurality of ribs.

9. An insert for a cooling system, the insert comprising: a plurality of ribs defining a plurality of flow channels therebetween, the plurality of ribs spaced apart from each other such that an axial space between adjacent ribs of the plurality of ribs increases towards an axial center of the plurality of ribs; an inlet portion located at a first end of the plurality of ribs; an outlet portion located at a second end of the plurality of ribs; and an insert wall located between the inlet portion and the outlet portion, the insert wall fluidly separating the inlet portion and the outlet portion.

10. The insert of claim 9, wherein each of the plurality of ribs defines a first rib end and a second rib end spaced away from the first rib end in a circumferential direction.

11. The insert of claim 10, wherein each of the plurality of ribs extends from the inlet portion to the outlet portion in the circumferential direction.

12. The insert of claim 9, wherein the insert further comprises one or more support members extending in an axial direction and intersecting each of the plurality of ribs.

13. The insert of claim 9, wherein adjacent segments of each rib of the plurality of ribs are angled with respect to each other to form an angled wave pattern.

14. The insert of claim 13, wherein the insert further comprises: a first end wall located at a first axial end of the insert; and a second end wall located at a second axial end of the insert, opposite the first axial end; wherein the first end wall and the second end wall extend around a circumference of the insert, such that the first end wall and the second end wall cooperate to define an internal volume of the insert.

15. A cooling system for an electric machine, the cooling system comprising: a stator jacket configured to be located proximate a stator, the stator jacket defining a cavity and a first opening located at a cavity first end of the cavity; an insert removably positioned within the cavity, the insert comprising a plurality of ribs defining a plurality of flow channels therebetween; and an endcap positioned at the first opening and extending at least partially into the cavity, such that the endcap retains the insert within the cavity.

16. The cooling system of claim 15, wherein the endcap comprises: a flange portion located outside the cavity; anda plug portion located within the cavity.

17. The cooling system of claim 16, wherein the flange portion is sized to be larger than the first opening.

18. The cooling system of claim 16, wherein the plug portion is sized to be smaller than the first opening, and the plug portion extends through the first opening.

19. The cooling system of claim 16, wherein: the cooling system includes a sealing member; the plug portion defining a channel sized to receive the sealing member therein; and the sealing member forms a seal between the channel and the stator jacket.

20. The cooling system of claim 15, wherein the endcap is removably coupled to the stator jacket.

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