A housing and generator system
By integrating the motor sub-assembly and the electronic control sub-assembly into the same housing and setting up partition plates and cooling channels, the problem of low integration in the prior art is solved, realizing the lightweight and compact design of the generator system, reducing cost and space occupation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING SOKON POWER CO LTD
- Filing Date
- 2025-08-12
- Publication Date
- 2026-07-10
AI Technical Summary
In existing new energy vehicle generator systems, the housings of the motor sub-assembly and the electronic control sub-assembly are not shared, resulting in low integration, large total weight, large space occupation, and complex cooling systems, which increases costs and layout inconvenience.
Design a housing that integrates the motor sub-assembly and the electronic control sub-assembly into the same housing. The housing is divided into two mounting cavities by a partition plate, which respectively mount the motor rotor assembly, the motor stator assembly, and the motor controller module. The housing also includes cooling channels for the electronic control and the motor, enabling heat dissipation and lubrication from the shared housing.
The overall weight and space occupied by the generator system were reduced, the layout was simplified, the amount of wiring harnesses and pipes used was reduced, production costs were lowered, and the overall layout efficiency of the vehicle was improved.
Smart Images
Figure CN224481559U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the automotive field, and more specifically, to a housing and a generator system. Background Technology
[0002] The generator system of new energy vehicles is divided into a motor sub-assembly and an electronic control sub-assembly. The structural forms of the motor sub-assembly and the electronic control sub-assembly generally include left-right connection type, split wire type, and top-bottom connection type. Both the motor sub-assembly and the electronic control sub-assembly have their own protective housings. The housings of the two do not share any parts, resulting in low integration, which leads to a large total weight of the generator system, a large space occupation, and is not conducive to the layout of the vehicle. Utility Model Content
[0003] This invention provides a housing and generator system that integrates the motor sub-assembly and the electronic control sub-assembly into one unit and shares the same housing, thereby improving integration and reducing the overall weight and space occupation of the generator system.
[0004] The embodiments of this utility model can be implemented as follows:
[0005] An embodiment of this utility model provides a housing, which includes:
[0006] The front housing has a first end bearing seat.
[0007] The middle shell has a partition plate inside, with a first mounting cavity and a second mounting cavity on both sides of the partition plate. A second end bearing seat is provided on the partition plate, which corresponds to the first end bearing seat. The front shell is connected to one side of the first mounting cavity of the middle shell. The first mounting cavity can be used to install the motor rotor assembly and the motor stator assembly. The motor rotor assembly is rotatably connected to the first end bearing seat and the second end bearing seat. The second mounting cavity can be used to install the motor controller module.
[0008] The rear cover plate is connected to one side of the second mounting cavity of the middle shell.
[0009] Optionally, an oil cooler is connected to the middle shell.
[0010] Optionally, an electronically controlled cooling channel is provided on the middle shell, and the cooling medium in the electronically controlled cooling channel flows through the oil cooler. The electronically controlled cooling channel can be used to dissipate heat for the motor controller module.
[0011] Optionally, the electronically controlled cooling channel includes an inlet channel, a water pipe interface, and an outlet channel. One end of the inlet channel is connected to the oil cooler, and the other end of the inlet channel is connected to the water inlet end of the cooling pipe on the motor controller module. The water outlet end of the cooling pipe on the motor controller module is connected to the water pipe interface, and the outlet channel is connected to the water pipe interface.
[0012] Optionally, a motor cooling channel is provided on the middle shell, and the oil in the motor cooling channel flows through the oil cooler. The motor cooling channel can be used to dissipate heat for the motor rotor assembly and the motor stator assembly.
[0013] Optionally, the motor cooling flow channel includes an oil suction channel, an oil outlet channel, and a cooling oil channel. The oil suction channel is connected to the inlet end of the oil circuit of the motor rotor assembly, the oil outlet channel is connected to the outlet end of the oil circuit of the motor rotor assembly, the oil outlet channel is also connected to the oil cooler, and the cooling oil channel is also connected to the oil cooler.
[0014] Optionally, the partition plate is also provided with an oil pump mounting base, which is coaxially arranged with the second end bearing housing.
[0015] Optionally, the front housing is also provided with an input shaft oil seal mounting hole, which is coaxially arranged with the first end bearing seat and is used to install an oil seal.
[0016] Optionally, the middle shell is provided with a first wiring hole and a second wiring hole, both of which are connected to the second mounting cavity. A protective cover is also provided at the first wiring hole.
[0017] An embodiment of this utility model also provides a generator system, including a motor rotor assembly, a motor stator assembly, a motor controller module, a filter, and the aforementioned housing. The motor rotor assembly and the motor stator assembly are housed in a first mounting cavity, and the motor controller module and the filter are housed in a second mounting cavity.
[0018] The beneficial effects of this utility model embodiment:
[0019] The housing includes a front shell, a middle shell, and a rear cover plate. The front shell is provided with a first end bearing seat. The middle shell has a partition plate inside, with a first mounting cavity and a second mounting cavity on each side of the partition plate. A second end bearing seat is provided on the partition plate, corresponding to the first end bearing seat. The front shell is connected to one side of the first mounting cavity of the middle shell, and the rear cover plate is connected to one side of the second mounting cavity of the middle shell. In this embodiment of the invention, the first mounting cavity can be used to install the motor rotor assembly and the motor stator assembly, and the second mounting cavity can be used to install the motor controller module. This integrates the electronic control sub-assembly and the motor sub-assembly onto the housing, sharing a single housing, which helps reduce the weight and space occupation of the generator system, and makes the overall structure more compact.
[0020] The generator system includes a housing, which has all the functions of the housing. Attached Figure Description
[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is an exploded view of the generator system provided in an embodiment of the present invention;
[0023] Figure 2 This is a first-view schematic diagram of the middle shell provided in an embodiment of the present utility model;
[0024] Figure 3 This is a second-view schematic diagram of the middle shell provided in an embodiment of the present invention;
[0025] Figure 4 This is a schematic diagram showing that the middle shell of this utility model is connected to the oil pump housing and the electronically controlled cooling channel.
[0026] Figure 5 This is a schematic diagram of the motor cooling channel provided in an embodiment of the present invention;
[0027] Figure 6 This is a first-view schematic diagram of the front shell provided in an embodiment of the present invention;
[0028] Figure 7 This is a second-view schematic diagram of the front shell provided in an embodiment of the present invention.
[0029] Icons: 1-Front shell; 10-First end bearing seat; 11-Input shaft oil seal mounting hole; 2-Middle shell; 20-Separator plate; 201-Second end bearing seat; 202-Oil pump mounting seat; 203-Oil pump housing; 21-First mounting cavity; 22-Second mounting cavity; 23-Electrical control cooling channel; 231-Water inlet channel; 232-Water pipe interface; 233-Water outlet channel; 24-Motor cooling channel; 241-Oil suction channel; 242-Oil outlet channel; 243-Cooling oil channel; 25-First wiring hole; 251-Protective cover plate; 26-Second wiring hole; 27-Three-phase wiring hole seat; 3-Rear cover plate; 4-Oil cooler; 5-Fuse box cavity; 50-Fuse wiring cover plate; 6-Reinforcing rib; 7-Lifting lug. Detailed Implementation
[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0033] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0034] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.
[0035] The terms “comprising,” “including,” or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0036] Unless otherwise explicitly specified and limited, terms such as "setup" and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0037] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.
[0038] With the rapid development of the new energy vehicle industry, competition has become extremely fierce, and generator systems in new energy vehicles are gradually moving towards integration and lightweight design. Currently, common generator systems on the market are divided into motor sub-assemblies and electronic control sub-assemblies. The structural forms of motor sub-assemblies and electronic control sub-assemblies generally include left-right connection type, split wire type, and top-bottom connection type. Both motor sub-assemblies and electronic control sub-assemblies have their own protective housings, and the housings of the two do not share any parts, resulting in low integration. This leads to a large total weight of the generator system, a large space occupation, and is not conducive to the layout of the entire vehicle. In addition, the low integration further leads to an increase in the materials used for connecting high and low voltage wiring harnesses and cooling system pipes, resulting in high cost, large size, and cumbersome layout.
[0039] In view of the above problems, the present invention provides a housing and generator system that can solve the above problems, and will be described in detail below.
[0040] Please refer to Figures 1 to 3 The housing includes a front shell 1, a middle shell 2, and a rear cover plate 3. A partition plate 20 is provided inside the middle shell 2, with a first mounting cavity 21 and a second mounting cavity 22 on either side of the partition plate 20. The front shell 1 is located on one side of the first mounting cavity 21 of the middle shell 2 and is connected to the middle shell 2. The rear cover plate 3 is located on one side of the second mounting cavity 22 of the middle shell 2 and is connected to the middle shell 2. A first end bearing seat 10 is also provided on the front shell 1, and a second end bearing seat 201 is provided on the partition plate 20. The second end bearing seat 201 corresponds to the first end bearing seat 10. Therefore, the first mounting cavity 21 can... The second mounting cavity 22 is used to install the motor rotor assembly and the motor stator assembly. The motor controller module can be installed in the second mounting cavity 22. The motor rotor assembly, the motor stator assembly and the motor controller module are integrated together and share a set of housings. Compared with the original connection arrangement, the integrated arrangement of this utility model embodiment can save a set of housings, reduce the total weight of the generator system, and make the overall structure of the generator system more compact. It can reduce the space occupation, which is beneficial to the layout of the whole vehicle. It can also reduce the amount of wiring harnesses and pipes used, which can reduce production costs.
[0041] A through hole is provided in the middle of the partition plate 20, which connects the first mounting cavity 21 and the second mounting cavity 22. The second end bearing seat 201 is located on the outer edge of the through hole for arranging the motor rotor assembly. An oil pump mounting seat 202 is provided inside the through hole, through which the inner and outer rotors of the motor rotor assembly can be mounted. The oil pump mounting seat 202 is provided with a sealing ring groove, through which an oil pump housing 203 can be connected. The oil pump housing 203 is snapped into the sealing ring groove, so that the oil pump housing 203 is sealed to the partition plate 20, and the oil pump housing 203 separates the first mounting cavity 21 and the second mounting cavity 22. Of course, the oil pump housing 203 is provided with a channel.
[0042] The middle shell 2 is provided with an electronically controlled cooling channel 23, which can be used to dissipate heat for the motor controller module. The middle shell 2 is also provided with a motor cooling channel 24, which can be used to dissipate heat for the motor rotor assembly. An oil cooler 4 is also connected to the middle shell 2. The cooling medium in the electronically controlled cooling channel 23 flows through the oil cooler 4, and the oil in the motor cooling channel 24 also flows through the oil cooler 4.
[0043] Specifically, the oil cooler has an oil flow channel and a water flow channel inside. The oil flow channel and the water flow channel are isolated from each other. The oil flow channel and the water flow channel can exchange heat in the process of countercurrent flow, so that the low temperature water in the water flow channel cools the high temperature oil in the oil flow channel.
[0044] refer to Figure 4 The electronically controlled cooling channel 23 is located on the middle shell 2. The electronically controlled cooling channel 23 includes an inlet channel 231, an outlet channel 233, and a water pipe interface 232. The motor controller module also has cooling pipes. One end of the inlet channel 231 connects to the outlet end of the water channel of the oil cooler 4, and the other end connects to the inlet end of the cooling pipe on the motor controller module. The outlet end of the cooling pipe on the motor controller module connects to the water pipe interface 232, and the outlet channel 233 connects to the water pipe interface 232 and an external water tank. The inlet end of the water channel of the oil cooler 4 connects to an external water injection pipe. When cooling medium is injected through the water injection pipe, the cooling medium flows sequentially through the water channel, inlet channel 231, cooling pipe, water pipe interface 232, and outlet channel 233 of the oil cooler 4, thereby dissipating heat and cooling the motor controller module. Of course, all connections of the electronically controlled cooling channel 23 are sealed to prevent leakage of the cooling medium. Low-temperature water can be used as the cooling medium.
[0045] refer to Figure 5The motor cooling channel 24 includes an oil suction channel 241, an oil outlet channel 242, and a cooling oil channel 243. One end of the oil suction channel 241 is connected to the cavity where the oil pump mounting base 202 is located, and the other end of the oil suction channel 241 is equipped with a filter element. After the oil is drawn through the filter element, it flows into the cavity where the oil pump mounting base 202 is located. The inlet end of the oil circuit of the motor rotor assembly is connected to the cavity. When the inner and outer rotors of the motor rotor assembly rotate, they will draw the oil in the cavity into the oil circuit of the motor rotor assembly. The oil plays a role in lubrication and heat dissipation for the motor rotor assembly. The outlet end of the oil circuit of the motor rotor assembly is connected to the oil pump housing 203. The channel on the upper part of the motor cooling channel 24 is connected to the oil outlet channel 242 on the partition plate 20. High-temperature oil, after lubricating and cooling the motor rotor assembly, flows into the oil outlet channel 242. The oil outlet channel 242 is connected to the oil flow channel of the oil cooler 4, which in turn is connected to the cooling oil channel 243. When the high-temperature oil flows through the oil cooler 4, it exchanges heat with the low-temperature water in the water flow channel, thus cooling down. The oil entering the cooling oil channel 243 is then cooled and becomes low-temperature oil. This low-temperature oil can be drawn into the suction channel 241 through the filter element for recirculation, providing further lubrication and cooling for the motor rotor assembly. Of course, all connections on the entire motor cooling channel 24 are sealed to prevent oil leakage.
[0046] The oil flows through the following paths: oil suction channel 241, the cavity where the oil pump mounting base 202 is located, the oil circuit of the motor rotor assembly, the channel on the oil pump housing 203, the oil outlet channel 242, the oil flow channel of the oil cooler 4, and the cooling oil channel 243.
[0047] Continue to refer to Figure 5 and combined Figure 1 The middle shell 2 is also provided with a first wiring hole 25 and a second wiring hole 26, both of which are connected to the second mounting cavity 22. High-voltage and low-voltage wiring harnesses can be arranged through the first wiring hole 25 and the second wiring hole 26 to achieve electrical connection with the outside. Of course, a protective cover plate 251 is also provided at the first wiring hole 25. The protective cover plate 251 covers the connection between the bolt and the copper busbar, which helps to improve safety. The protective cover plate 251 is connected to the middle shell 2 by screws or other means.
[0048] The middle shell 2 is also die-cast with a three-phase wiring hole seat 27, which connects the first mounting cavity 21 and the second mounting cavity 22. The three-phase wiring hole seat 27 is also connected to the first wiring hole 25 of the middle shell 2. A three-phase wiring harness can be arranged through the three-phase wiring hole seat 27. The three-phase wiring harness can be connected to the motor in the first mounting cavity 21 and the motor controller module in the second mounting cavity 22. The motor controller module controls the start, stop and operation of the motor and the conversion of AC to DC power.
[0049] refer to Figure 6 and Figure 7The front housing 1 is also provided with an input shaft oil seal mounting hole 11, which extends through both sides of the front housing 1. A first end bearing seat 10 is provided on the edge of the front housing 1 near the middle housing 2. The input shaft oil seal mounting hole 11 is coaxially arranged with the first end bearing seat 10. An oil seal can be installed in the input shaft oil seal mounting hole 11, and the oil seal can seal the first mounting cavity 21. The oil seal is a common mechanical component and will not be shown or described here.
[0050] In this embodiment, the middle shell 2 is bolted to the front shell 1 and the rear cover plate 3 to facilitate assembly and disassembly. Meanwhile, the middle shell 2 and the partition plate are integrally cast or die-cast under high pressure. The flow channels on the middle shell 2 are formed using a pre-cast core-pulling process, followed by machining.
[0051] Optionally, both the middle shell 2 and the partition plate 20 are provided with reinforcing ribs 6 to improve the load-bearing strength of the middle shell 2 and the partition plate 20. The form of the reinforcing ribs 6 is not limited here. In this embodiment, the reinforcing ribs 6 on the middle shell 2 are arranged around its outer wall, and the reinforcing ribs 6 on the partition plate 20 are arranged in a radiating pattern. The middle shell 2 is also provided with weight-reducing grooves. The weight-reducing grooves are generally located in the non-load-bearing areas of the middle shell 2, such as near the top corners of the middle shell 2. Weight reduction can be achieved by drilling holes or slotting. The specific arrangement can be determined according to the actual situation and is not limited here.
[0052] refer to Figure 1 The middle shell 2 is also equipped with lifting lugs 7, which have lifting holes. These holes allow for convenient lifting and movement using lifting equipment, facilitating mechanized operations. The lifting lugs 7 and the middle shell 2 can be connected by welding, bolting, integral casting, high-pressure die casting, or other reliable connection methods. Of course, the structure of the lifting lugs 7 can also take other forms, and this is not limited.
[0053] The housing of this utility model embodiment can integrate the motor rotor assembly, motor stator assembly and motor controller module into one housing, which can reduce the total weight of the generator system and make the overall structure of the generator system more compact, reduce space occupation, and facilitate the layout of the whole vehicle. Moreover, the cooling channels of the motor and the cooling channels of the generator control module are arranged on the middle shell 2 and the partition plate 20, which can reduce the amount of pipe material and reduce production costs.
[0054] An embodiment of this utility model also provides a generator system, including a motor rotor assembly, a motor stator assembly, a motor controller module, a filter, and the aforementioned housing. The motor rotor assembly and the motor stator assembly are housed in a first mounting cavity 21. The two ends of the motor rotor assembly are respectively connected to a first end bearing seat 10 and a second end bearing seat 201 via bearings, allowing the motor rotor assembly to rotate relative to the housing. The motor stator assembly is installed in the first mounting cavity 21 and fixed by welding, screwing, or heat-fitting interference fit. The motor controller module and the filter are housed in a second mounting cavity 22. The second mounting cavity 22 is provided with pins and studs. The pins can be used to position the motor controller module and the filter, and the studs have threaded holes. The motor controller module and the filter can be fixed in a preset position within the second mounting cavity 22 by the cooperation of the studs and screws.
[0055] refer to Figure 1 and Figure 2 The second mounting cavity 22 of the middle shell 2 also has a fuse box cavity 5 on its side. The fuse box cavity 5 is separated from the second mounting cavity 22 and has a connecting hole. A fuse adapter copper busbar can be arranged through this connecting hole. The fuse adapter copper busbar connects the filter and the fuse box copper busbar, and is used to transmit the AC power filtered to remove noise to the fuse box cavity 5. The fuse box cavity 5 contains fuses and adapters. The fuses, adapters, and fuse box copper busbars are connected. The adapters can be used to connect to the vehicle's wiring, and the fuses provide protection. The fuse box cavity 5 is also covered with a fuse wiring cover 50, which encapsulates the fuses and adapters inside the fuse box cavity 5. The fuse wiring cover 50 is bolted to the cavity wall of the fuse box cavity 5.
[0056] The motor rotor assembly, motor stator assembly, motor controller module, and filter are all existing technologies and will not be described in detail here.
[0057] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.
Claims
1. A housing, characterized in that, include: Front housing (1), the front housing (1) is provided with a first end bearing seat (10); The middle shell (2) has a partition plate (20) inside. The two sides of the partition plate (20) are a first mounting cavity (21) and a second mounting cavity (22). A second end bearing seat (201) is provided on the partition plate (20). The second end bearing seat (201) corresponds to the first end bearing seat (10). The front shell (1) is connected to one side of the first mounting cavity (21) of the middle shell (2). The first mounting cavity (21) can be used to install the motor rotor assembly and the motor stator assembly. The motor rotor assembly is rotatably connected to the first end bearing seat (10) and the second end bearing seat (201). The second mounting cavity (22) can be used to install the motor controller module. The rear cover plate (3) is connected to one side of the second mounting cavity (22) of the middle shell (2).
2. The housing according to claim 1, characterized in that, The middle shell (2) is connected to an oil cooler (4).
3. The housing according to claim 2, characterized in that, The middle shell (2) is provided with an electronically controlled cooling channel (23), and the cooling medium in the electronically controlled cooling channel (23) flows through the oil cooler (4). The electronically controlled cooling channel (23) can be used to dissipate heat for the motor controller module.
4. The housing according to claim 3, characterized in that, The electronically controlled cooling channel (23) includes an inlet channel (231), a water pipe interface (232), and an outlet channel (233). One end of the inlet channel (231) is connected to the oil cooler (4), and the other end of the inlet channel (231) is connected to the water inlet end of the cooling pipe on the motor controller module. The water outlet end of the cooling pipe on the motor controller module is connected to the water pipe interface (232), and the outlet channel (233) is connected to the water pipe interface (232).
5. The housing according to claim 2, characterized in that, The middle shell (2) is provided with a motor cooling channel (24), and the oil in the motor cooling channel (24) flows through the oil cooler (4). The motor cooling channel (24) can be used to dissipate heat for the motor rotor assembly and the motor stator assembly.
6. The housing according to claim 5, characterized in that, The motor cooling channel (24) includes an oil suction channel (241), an oil outlet channel (242), and a cooling oil channel (243). The oil suction channel (241) is connected to the inlet end of the oil circuit of the motor rotor assembly. The oil outlet channel (242) is connected to the outlet end of the oil circuit of the motor rotor assembly. The oil outlet channel (242) is also connected to the oil cooler (4). The cooling oil channel (243) is also connected to the oil cooler (4).
7. The housing according to claim 1, characterized in that, The partition plate (20) is also provided with an oil pump mounting seat (202), which is coaxially arranged with the second end bearing seat (201).
8. The housing according to claim 1, characterized in that, The front housing (1) is also provided with an input shaft oil seal mounting hole (11), which is coaxially arranged with the first end bearing seat (10). The input shaft oil seal mounting hole (11) is used to install an oil seal.
9. The housing according to any one of claims 1-8, characterized in that, The middle shell (2) is provided with a first wiring hole (25) and a second wiring hole (26). The first wiring hole (25) and the second wiring hole (26) are connected to the second mounting cavity (22). A protective cover plate (251) is also provided at the first wiring hole (25).
10. A generator system, characterized in that, The device includes a motor rotor assembly, a motor stator assembly, a motor controller module, a filter, and a housing as described in any one of claims 1-9, wherein the motor rotor assembly and the motor stator assembly are housed in the first mounting cavity (21), and the motor controller module and the filter are housed in the second mounting cavity (22).