A dual voltage electric machine and a power device including the same

Abstract

The application provides a dual-voltage motor and a power device comprising the dual-voltage motor, the dual-voltage motor comprising a casing, a stator assembly, a rotor assembly and a voltage switching assembly. The casing has a cavity. The stator assembly is fixed in the cavity and has a stator winding. The rotor assembly comprises a rotating shaft and a magnetic piece fixedly connected to the rotating shaft and configured to rotate with the rotating shaft, the magnetic piece being arranged in the stator winding, and the rotating shaft being configured to pass through the stator assembly and the cavity of the casing. The voltage switching assembly comprises an attraction component, a first voltage bus component, a second voltage bus component and a connecting component, the connecting component being electrically connected to the stator assembly, and the first voltage bus component and the second voltage bus component being capable of being electrically connected or disconnected to the connecting component in response to the attraction and disconnection of the attraction component, so that the dual-voltage motor is switched between different voltages. The dual-voltage motor provided by the application has a shorter stator and rotor, thereby reducing the manufacturing cost.

Description

Technical Field

[0001] This application relates to the field of motor technology, specifically to a dual-voltage motor and a power device including the dual-voltage motor. Background Technology

[0002] Currently, motors with high and low voltage switching typically consist of two sets of windings: a high-voltage winding and a low-voltage winding. By applying the corresponding voltages to the high-voltage winding and the low-voltage winding respectively, the motor can have high and low voltages, thereby outputting different torques to meet different application requirements.

[0003] However, in related technologies, having two independent windings increases the length of the motor's stator and rotor, thereby increasing the motor's manufacturing cost. Summary of the Invention

[0004] This application provides a dual-voltage motor and a power unit including the dual-voltage motor, the dual-voltage motor having a shorter stator and rotor, thereby reducing its manufacturing cost.

[0005] In a first aspect, this application provides a dual-voltage motor, including a housing, a stator assembly, a rotor assembly, and a voltage switching assembly. The housing has a cavity. The stator assembly is fixed within the cavity and has stator windings. The rotor assembly includes a shaft and a magnetic element fixedly connected to the shaft and configured to rotate with the shaft. The magnetic element is disposed within the stator windings, and the shaft is configured to pass through the cavity of the stator assembly and the housing. The voltage switching assembly includes an engaging component, a first voltage bus component, a second voltage bus component, and a connecting component. The connecting component is electrically connected to the stator assembly. The first and second voltage bus components are capable of electrically connecting or disconnecting from the connecting component respectively in response to the engaging and disengaging of the engaging component, thereby enabling the dual-voltage motor to switch between different voltages.

[0006] In the dual-voltage motor provided in this application, the voltage switching component includes an engaging component, a first voltage bus component, a second voltage bus component, and a connecting component. The connecting component is electrically connected to the stator assembly. The first and second voltage bus components can be electrically connected or disconnected from the connecting component respectively in response to the engaging and disengaging of the engaging component, enabling the dual-voltage motor with one set of stator windings to switch between different voltages. Furthermore, the dual-voltage motor can output different torques through the rotor assembly. Compared to existing motors with high and low voltage switching, which typically consist of two sets of windings, the dual-voltage motor of this application includes only one set of windings and achieves voltage switching through the voltage switching component. This shortens the length of the stator and rotor of the dual-voltage motor, thereby reducing the material cost and manufacturing cost.

[0007] According to any of the foregoing embodiments of the first aspect of this application, the stator winding includes a stator lamination assembly and a rotating magnetic field winding having multiple phases. The stator lamination assembly has a plurality of stator teeth spaced apart and the plurality of stator teeth surrounding a first through hole, the magnetic element being located within the first through hole. The rotating magnetic field winding is disposed on the stator teeth and connected to the connecting member.

[0008] According to any of the foregoing embodiments of the first aspect of this application, the magnetic component includes a rotor lamination assembly and a magnetic body. The rotor lamination assembly is located within a first through hole of the stator lamination assembly, the rotor lamination assembly has a second through hole and a mounting groove, and the rotor lamination assembly is interference-fitted with the rotating shaft through the second through hole. The magnetic body is located within the mounting groove.

[0009] According to any of the foregoing embodiments of the first aspect of this application, the engaging component includes an engaging portion and a driving portion. The first voltage bus component and the second voltage bus component are respectively arranged circumferentially around the engaging portion and are movable with the engaging portion. The driving portion is drivenly connected to the engaging portion and is used to drive the engaging portion to engage or disengage with the driving portion, thereby enabling the dual-voltage motor to switch between different voltages.

[0010] According to any of the foregoing embodiments of the first aspect of this application, the suction part includes a first cylindrical body, a first cover, and a first iron core. The first cylindrical body has a first receiving cavity with openings at both ends. The first cover is connected to the outer peripheral wall of the first cylindrical body. The first iron core is located in the first receiving cavity and connected to the first cover, so that the first voltage busbar and the second voltage busbar arranged circumferentially around the first cylindrical body can move with the first cylindrical body. The driving part includes a second cylindrical body, a second cover, a coil, a spring, and a second iron core. The second cylindrical body has a second receiving cavity with openings at both ends. The second cover is disposed on the opening of the second receiving cavity away from the second cylindrical body. The coil is located in the second receiving cavity and wound around the outer surface of the second iron core. The spring is located between the first cover and the second cylindrical body. The second iron core is located in the second receiving cavity, and the second iron core includes a first end and a second end connected to each other. The first end is connected to the second cover, and there is a gap between the second end and the cavity wall of the second receiving cavity.

[0011] According to any of the foregoing embodiments of the first aspect of this application, the driving part includes a cylinder, and the cylinder is drivenly connected to the suction part.

[0012] According to any of the foregoing embodiments of the first aspect of this application, the housing includes a shell, a first cover, and a second cover. The shell has a cavity with openings at both ends. The first cover covers one opening of the cavity. The second cover covers the other opening of the cavity. The rotor assembly further includes a bearing sleeved on the outer periphery of the rotating shaft, the rotating shaft being rotatably passed through the first cover via the bearing.

[0013] According to any of the foregoing embodiments of the first aspect of this application, the dual-voltage motor further includes an elastic limiting member located between the bearing and the first cover.

[0014] According to any of the foregoing embodiments of the first aspect of this application, the dual-voltage motor further includes a position sensor fixed to the second cover and electrically connected to the stator assembly and / or the rotor assembly.

[0015] Secondly, this application provides a power device, including the dual-voltage motor described in any embodiment of the first aspect of this application.

[0016] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0017] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become apparent to those skilled in the art. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0018] Figure 1 The present application provides a schematic diagram of the structure of a dual-voltage motor according to some embodiments;

[0019] Figure 2 A cross-sectional structural schematic diagram of a dual-voltage motor provided in some embodiments of this application is shown;

[0020] Figure 3 This application provides a schematic diagram of the structure of a voltage switching component in a dual-voltage motor according to some embodiments;

[0021] Figure 4 Show Figure 3 Cross-sectional structural diagram of the medium voltage switching component;

[0022] Figure 5An exploded structural diagram of a voltage switching component in a dual-voltage motor provided in some embodiments of this application is shown;

[0023] Figure 6 Show Figure 5 A schematic diagram of the engaging component in the medium voltage switching assembly;

[0024] Figure 7 Show Figure 5 A schematic diagram of the connecting components in the medium voltage switching assembly;

[0025] Figure 8 Show Figure 5 A schematic diagram of the structure of the first voltage busbar in the medium voltage switching assembly;

[0026] Figure 9 Show Figure 5 A schematic diagram of the structure of the second voltage busbar in the medium voltage switching assembly.

[0027] The reference numerals in the detailed embodiments are as follows:

[0028] 1000-Dual Voltage Motor;

[0029] 100-Voltage switching component;

[0030] 10-Actuating component, 11-Actuating part, 111-First cylinder, 112-First cover, 113-First iron core, 12-Drive part, 121-Second cylinder, 122-Second cover, 123-Coil, 124-Spring, 125-Second iron core;

[0031] 20-First voltage busbar component, 21-First voltage busbar body, 22-First protrusion, 221-First grounding protrusion, 222-First wiring protrusion, 23-First wiring terminal, 231-First U-phase terminal, 232-First V-phase terminal, 233-First W-phase terminal;

[0032] 30-Second voltage busbar component, 31-Second voltage busbar body, 32-Second protrusion, 321-Second grounding protrusion, 322-Second wiring protrusion, 33-Second wiring terminal, 331-Second U-phase terminal, 332-Second V-phase terminal, 333-Second W-phase terminal;

[0033] 40-Connecting component, 41-Connecting body, 42-First connecting post, 421-First electrical connection terminal, 422-Second electrical connection terminal, 43-Second connecting post, 431-Third electrical connection terminal, 432-Fourth electrical connection terminal;

[0034] 200 - Casing, 201 - First cover, 202 - Housing, 203 - Second cover;

[0035] 300 - Stator assembly; 301 - Stator lamination assembly;

[0036] 400-Rotor assembly, 401-Shaft, 402-Rotor lamination assembly, 403-Magnetic body, 404-Bearing;

[0037] 500 - Flexible limiting component;

[0038] 600 - Position sensor;

[0039] 700-Support component, 701-Base, 702-Foot. Detailed Implementation

[0040] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0042] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0043] In this document, the term "implementation" means that a specific feature, structure, or characteristic described in connection with an implementation may be included in at least one implementation of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same implementation, nor is it a separate or alternative implementation mutually exclusive with other implementations. It will be explicitly and implicitly understood by those skilled in the art that the implementations described herein can be combined with other implementations.

[0044] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0045] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple groups" refers to two or more (including two groups), and "multiple pieces" refers to two or more (including two pieces).

[0046] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "transverse", "length", "width", "wall thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and other indications of orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0047] In the description of the embodiments of this application, unless otherwise explicitly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0048] Dual voltage motor

[0049] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a dual-voltage motor provided in some embodiments of this application is shown. Figure 2 A cross-sectional structural schematic diagram of a dual-voltage motor provided in some embodiments of this application is shown;

[0050] Firstly, such as Figure 1 and Figure 2As shown, this application provides a dual-voltage motor 1000, which includes a voltage switching assembly 100, a housing 200, a stator assembly 300, and a rotor assembly 400. The housing 200 has a cavity. The stator assembly 300 is fixed within the cavity and has stator windings. The rotor assembly 400 includes a shaft 401 and a magnetic element fixedly connected to the shaft 401 and configured to rotate with the shaft 401. The magnetic element is disposed within the stator windings, and the shaft 401 is configured to pass through the cavity of the stator assembly 300 and the housing 200. The voltage switching assembly 100 includes an engaging component 10, a first voltage bus component 20, a second voltage bus component 30, and a connecting component 40. The connecting component 40 is electrically connected to the stator assembly 300. The first voltage bus component 20 and the second voltage bus component 30 are electrically connected to or disconnected from the connecting component 40 respectively in response to the engaging and disengaging of the engaging component 10, so that the dual-voltage motor 1000 switches between different voltages.

[0051] In this application, the cavity of the housing 200 is used to accommodate the stator assembly 300, rotor assembly 400, voltage switching assembly 100, or other components, to isolate them from the outside and reduce external interference. The housing 200 can be made of metal, such as copper, iron, aluminum, or their alloys, or non-metallic materials, such as rubber. Furthermore, the shape of the housing 200 can be angular or circular; this application does not impose specific limitations.

[0052] The stator assembly 300 can generate a radial control magnetic field, and magnetic flux flows radially along the stator assembly 300. The rotor assembly 400 can generate a bias magnetic field, and the control magnetic field can control the bias magnetic field to control the rotation of the shaft 401.

[0053] In this application, the voltages of the first voltage bus component 20 and the second voltage bus component 30 in the voltage switching assembly 100 are not the same. The engaging component 10 can engage or disengage. The first voltage bus component 20 and the second voltage bus component 30 can be electrically connected or disconnected from the connecting component 40 respectively in response to the engaging and disengaging of the engaging component 10, so that the dual-voltage motor 1000 switches between different voltages, that is, switches between the first voltage collected by the first voltage bus component 20 and the second voltage collected by the second voltage bus component 30.

[0054] In the dual-voltage motor provided in this application, the voltage switching component 100 includes an engaging component 10, a first voltage bus component 20, a second voltage bus component 30, and a connecting component 40. The connecting component 40 is electrically connected to the stator assembly 300. The first voltage bus component 20 and the second voltage bus component 30 can be electrically connected or disconnected from the connecting component 40 respectively in response to the engaging and disengaging of the engaging component 10, so that the dual-voltage motor 1000 with one set of stator windings can switch between different voltages. Thus, the dual-voltage motor 1000 can output torque corresponding to the voltage through the rotor assembly 400 under different voltages. Compared with the prior art motors with high and low voltage switching power supply, which are usually composed of two sets of windings, the dual-voltage motor 1000 of this application includes one set of windings and realizes the switching of different voltages through the voltage switching component 100. This shortens the length of the stator and rotor of the dual-voltage motor 1000, thereby reducing the material cost of the dual-voltage motor 1000 and thus reducing the manufacturing cost of the dual-voltage motor 1000.

[0055] In some embodiments of this application, the stator winding includes a stator lamination assembly 301 and a rotating magnetic field winding having multiple phases. The stator lamination assembly 301 has a plurality of stator teeth spaced apart and a first through hole formed by the plurality of stator teeth, with a magnetic element located within the first through hole. The rotating magnetic field winding is disposed on the stator teeth and connected to a connecting member.

[0056] In embodiments of this application, the stator teeth can be made of oriented silicon steel sheets or silicon steel sheets, and are formed into stator lamination group 301 by stamping and stacking, with the magnetic flux direction of the stator teeth being the same as the rolling direction of the oriented silicon steel sheets or silicon steel sheets. The stator teeth can also be made of high-saturation magnetic induction soft magnetic material sheets, and are formed into stator lamination group 301 by stamping and stacking. Oriented silicon steel sheets, silicon steel sheets, or high-saturation magnetic induction soft magnetic materials can increase the saturation magnetic flux density of the stator teeth, thereby increasing the air gap magnetic flux density and motor torque performance, while reducing iron losses and improving the efficiency of the dual-voltage motor 1000 during high-speed operation.

[0057] The rotating magnetic field winding is made of continuous, uninterrupted winding wire, which is wound as multiple coils onto the stator teeth. Furthermore, the rotating magnetic field winding is electrically connected to connecting components, allowing it to be connected to different voltages.

[0058] In some embodiments of this application, the magnetic component includes a rotor lamination assembly 402 and a magnetic body 403. The rotor lamination assembly 402 is located within a first through hole of the stator lamination assembly 301. The rotor lamination assembly 402 has a second through hole and a mounting groove. The rotor lamination assembly 402 is interference-fitted with the rotating shaft 401 through the second through hole. The magnetic body 403 is located within the mounting groove.

[0059] In the embodiments of this application, interference fit refers to the relationship that the shaft diameter of the rotating shaft 401 is larger than the inner diameter of the second through hole.

[0060] The rotor lamination assembly 402 can be made of soft magnetic materials (such as silicon steel), non-soft magnetic materials, or a mixture thereof. In some embodiments, the rotor lamination assembly 402 can be made of aluminum alloy, which can significantly reduce its weight to increase the constant density of the dual-voltage motor 1000.

[0061] In some embodiments of this application, the magnetic element is a permanent magnet that is capable of generating a bias magnetic field.

[0062] Furthermore, in some embodiments of this application, the permanent magnet may be made of neodymium iron boron magnets.

[0063] In addition, in some other embodiments of this application, the rotor assembly 400 may include a plurality of permanent magnets arranged in a circumferential direction along the rotor lamination group 402 to form a Halbach array.

[0064] In these embodiments, the permanent magnet can be fixed in the mounting groove with glue.

[0065] In some embodiments of this application, the rotor assembly 400 further includes a first rotor cover plate and a second rotor cover plate, respectively located at both ends of the rotor lamination group 402, so as to install the rotor lamination group 402 in the stator winding.

[0066] In some embodiments of this application, the rotor assembly 400 further includes a fastener that passes sequentially through the first rotor cover plate, the rotor lamination assembly 402, and is riveted to the second cover plate. In some embodiments, the fastener may be a pin.

[0067] In some embodiments of this application, the rotating shaft 401 includes a rotating shaft body and a magnet, the magnet being disposed at one end of the rotating shaft body. In some embodiments, the magnet is fixed to one end of the rotating shaft body by adhesive.

[0068] like Figure 2 As shown, in some embodiments of this application, the dual-voltage motor 1000 further includes a support assembly 700 for supporting the housing 200.

[0069] Furthermore, in some embodiments of this application, the support assembly 700 includes a base 701 and two feet 702 disposed opposite to each other. The base 701 is located on one side of the housing 200, and the feet 702 are spaced apart on the side of the base 701 opposite to the housing 200.

[0070] Please refer to Figure 3-5 , Figure 3 A schematic diagram of the structure of a voltage switching component in a dual-voltage motor provided in some embodiments of this application is shown. Figure 4 Show Figure 3 A cross-sectional view of the medium voltage switching component.

[0071] Figure 5 An exploded structural diagram of a voltage switching component in a dual-voltage motor provided in some embodiments of this application is shown.

[0072] like Figure 3 , Figure 4 and Figure 5 As shown, in some embodiments of this application, the engaging component 10 includes an engaging portion 11 and a driving portion 12. A first voltage bus component 20 and a second voltage bus component 30 are respectively arranged circumferentially around the engaging portion 11 and are movable with the engaging portion 11. The driving portion 12 is drivenly connected to the engaging portion 11 and is used to drive the engaging portion 11 to engage or disengage with the driving portion 12, thereby enabling the dual-voltage motor 1000 to switch between different voltages.

[0073] In the above embodiments, the first voltage busbar 20 can electrically connect an external first voltage power supply to the stator assembly 300 via the connecting member 40, and the second voltage busbar 30 can also electrically connect an external second voltage power supply to the stator assembly 300 via the connecting member 40, thereby enabling the dual-voltage motor 1000 to operate normally under different voltages. The engaging part 11 is driven to connect with the driving part 12, so that the engaging part 11 can drive the first voltage busbar 20 and the second voltage busbar 30 to electrically connect with the connecting member 40, thereby realizing the switching of different voltages in the dual-voltage motor with a single set of windings. The driving connection mentioned here refers to a connection method capable of transmitting driving force; it can be a direct connection or an indirect connection, as long as it can drive the engaging part 11 to engage or disengage with the driving part 12.

[0074] Furthermore, in the embodiments of this application, there is no specific limitation on the relative positions of the first voltage bus component 20 and the second voltage bus component 30 on the absorbing part 11. The first voltage bus component 20 can be disposed above the second voltage bus component 30 or below the second voltage bus component 30, as long as it can switch between different voltages as the absorbing part 11 is absorbed and disconnected.

[0075] In the above embodiments, the driving part 12 included in the attracting part 10 can drive the attracting part 11 to engage or disengage with the driving part 12, so that the voltage switching component 100 switches between the first voltage state and the second voltage state. This can drive the first voltage bus component 20 or the second voltage bus component 30 to be electrically connected to the connecting part 40, thereby enabling the dual-voltage motor to have the first voltage and the second voltage under one set of windings, thereby avoiding mutual interference between the two sets of windings, reducing the error rate of the motor, and improving its working efficiency.

[0076] In some embodiments of this application, the first voltage busbar 20 is disposed above the second voltage busbar 30. When the drive unit 12 and the engaging unit 11 are disconnected, the first voltage busbar 20 is electrically connected to the connecting member 40, while the second voltage busbar 30 is not electrically connected to the connecting member 40, thereby causing the motor to output torque of the first voltage. When the drive unit 12 and the engaging unit 11 are engaged, the first voltage busbar 20 is disconnected from the connecting member 40 under the drive of the engaging unit 11, while the second voltage busbar 30 moves synchronously with the first voltage busbar 20, and then moves upward to be electrically connected to the connecting member 40, thereby switching the first voltage to the second voltage so that the motor outputs torque of the second voltage.

[0077] In some embodiments of this application, the first voltage bus 20 is disposed below the second voltage bus 30. When the drive unit 12 and the engaging unit 11 are disconnected, the second voltage bus 30 is electrically connected to the connecting member 40, while the first voltage bus 20 is not electrically connected to the connecting member 40, thereby causing the motor to output torque of the second voltage. When the drive unit 12 and the engaging unit 11 are engaged, the second voltage bus 30 is disconnected from the connecting member 40 under the drive of the engaging unit 11, while the first voltage bus 20 and the second voltage bus 30 move synchronously, moving upward to electrically connect with the connecting member 40, thereby switching the second voltage to the first voltage so that the motor outputs torque of the first voltage.

[0078] Please refer to Figure 6 , Figure 6 Show Figure 5 A schematic diagram of the engaging component in the medium voltage switching assembly.

[0079] like Figure 6As shown, in some embodiments of this application, the suction part 11 includes a first cylindrical body 111, a first cover 201112, and a first iron core 113. The first cylindrical body 111 has a first receiving cavity with openings at both ends. The first cover 201112 is connected to the outer peripheral wall of the first cylindrical body 111. The first iron core 113 is located in the first receiving cavity and is connected to the first cover 201112, so that the first voltage bus component 20 and the second voltage bus component 30 arranged circumferentially around the first cylindrical body 111 can move with the first cylindrical body 111. The drive unit 12 includes a second cylinder 121, a second cover 203122, a coil 123, a spring 124, and a second iron core 125. The second cylinder 121 has a second receiving cavity with openings at both ends. The second cover 203122 covers the opening of the second receiving cavity away from the second cylinder 121. The coil 123 is located in the second receiving cavity and wound around the outer surface of the second iron core 125. The spring 124 is located between the first cover 201112 and the second cylinder 121. The second iron core 125 is located in the second receiving cavity and includes a first end and a second end that are connected to each other. The first end is connected to the second cover 203122, and there is a gap between the second end and the cavity wall of the second receiving cavity.

[0080] In the embodiments of this application, the shapes of the first cylindrical body 111 and the second cylindrical body 121 can be designed according to the shape of the motor, and are generally square or circular. Furthermore, the embodiments of this application do not specifically limit the diameters of the first cylindrical body 111 and the second cylindrical body 121; that is, the diameter of the first cylindrical body 111 can be larger or smaller than the diameter of the second cylindrical body 121. In some embodiments, the diameter of the first cylindrical body 111 is larger than the diameter of the second cylindrical body 121.

[0081] The first cover 201112 and the second cover 203122 can be made of conductive metal or insulating material. For example, the conductive metal can be copper, aluminum or other metals, and the insulating material can be plastic or rubber or other materials. This application embodiment does not impose specific limitations here.

[0082] When coil 123 is connected to an external power source, it generates a magnetic field. Under the force of this magnetic field, the first iron core 113 and the second iron core 125 attract each other, thereby causing the first voltage bus component 20 or the second voltage bus component 30 to rise and compress the spring 124. When the power is off, the magnetic field force disappears, and the first iron core 113 is driven to disconnect from the second iron core 125 under the force of the spring 124.

[0083] In the above embodiments, the switching of different voltages can be quickly achieved through the action of the magnetic field and the action of the spring 124, so as to further improve the voltage switching rate of the dual-voltage motor and thus improve the working efficiency of the dual-voltage motor.

[0084] In some embodiments of this application, the outer diameter of the first iron core 113 is smaller than the inner diameter of the second cylinder 121.

[0085] In the above embodiments, the outer diameter of the first iron core 113 is smaller than the inner diameter of the second cylinder 121. This allows the first iron core 113 to be attracted to the second iron core 125 inside the second cylinder 121 under the action of the magnetic field, thereby reducing external interference and further accelerating voltage switching.

[0086] Please refer to Figure 7 , Figure 7 Show Figure 5 A schematic diagram of the connecting components in the medium voltage switching assembly 100.

[0087] like Figure 7 As shown, in some embodiments of this application, the connecting component 40 includes a connecting body 41, a plurality of first connecting posts 42, and a plurality of second connecting posts 43. The inner wall of the connecting body 41 has a plurality of wire grooves. The plurality of first connecting posts 42 are arranged in a one-to-one correspondence with the plurality of wire grooves and are spaced apart along the circumference of the connecting body 41. The plurality of first connecting posts 42 are used for electrical connection with the first voltage busbar component 20. The plurality of second connecting posts 43 are arranged in a one-to-one correspondence with the plurality of wire grooves and are spaced apart along the circumference of the connecting body 41. The plurality of second connecting posts 43 are used for electrical connection with the second voltage busbar component 30. The first connecting posts 42 are located between two adjacent second connecting posts 43.

[0088] In embodiments of this application, the first connecting post 42 and the second connecting post 43 can be integrally injection molded with the connecting body 41, or they can be manufactured separately. In some embodiments, the connecting body 41 is annular, and the annular connecting body 41 has a plurality of first through holes and a plurality of second through holes along its circumference, with the first through holes corresponding to the first connecting post 42 and the second through holes corresponding to the second connecting post 43. It is understood that the first connecting post 42 and the second connecting post 43 are electrical connection terminals. The first connecting post 42 includes a first electrical connection terminal 421 and a second electrical connection terminal 422, wherein the first electrical connection terminal 421 is a grounding terminal. The second connecting post 43 includes a third electrical connection terminal 431 and a fourth electrical connection terminal 432, wherein the third electrical connection terminal 431 is a grounding terminal. Furthermore, both ends of these electrical connection terminals have sockets, and the first voltage bus component 20 and the second voltage bus component 30 can be electrically connected to the connecting component 40 by being inserted into the sockets.

[0089] Please refer to Figure 8 , Figure 8 Show Figure 5 A schematic diagram of the structure of the first voltage busbar in the medium voltage switching assembly 100.

[0090] like Figure 8As shown, in some embodiments of this application, the first voltage bus component 20 includes a first voltage bus body 21, a plurality of first protrusions 22, and a first terminal 23. The plurality of first protrusions 22 protrude from the lower surface of the first voltage bus body 21 and are disposed opposite to and electrically connected to a plurality of first connecting posts 42. The first terminal 23 is connected to the first voltage bus body 21 and is used to electrically connect to the input terminal of the motor.

[0091] In the above embodiments, the first voltage bus body 21 may be annular or square, and the embodiments of this application do not impose specific limitations on this. The first terminal 23 has a first U-phase terminal 231, a first V-phase terminal 232, and a first W-phase terminal 233 that are electrically connected to the input terminal of the motor. The first protrusion 22 includes a first grounding protrusion 221 and a first wiring protrusion 222 that are electrically connected to each other. The first grounding protrusion 221 can be inserted into the socket of the first electrical connection terminal 421, and the first wiring protrusion 222 can be inserted into the socket of the second electrical connection terminal 422, thereby electrically connecting the first voltage bus component 20 and the connecting component 40.

[0092] Please refer to Figure 9 , Figure 9 Show Figure 5 A schematic diagram of the structure of the second voltage busbar in the medium voltage switching assembly 100.

[0093] like Figure 9 As shown, in some embodiments of this application, the second voltage bus component 30 includes a second voltage bus body 31, a plurality of second protrusions 32, and a second terminal 33. The plurality of second protrusions 32 protrude from the upper surface of the second voltage bus body 31 and are disposed opposite to and electrically connected to a plurality of second connecting posts 43. The second terminal 33 is connected to the second voltage bus body 31 and is used to electrically connect to the input terminal of the motor.

[0094] In the above embodiments, the second voltage bus body 31 can be ring-shaped or square, and the embodiments of this application do not impose specific limitations on this. The second terminal 33 has a second U-phase terminal 331, a second V-phase terminal 332, and a second W-phase terminal 333 that are electrically connected to the motor's input terminal. The second protrusion 32 includes a second grounding protrusion 321 and a second wiring protrusion 322 that are electrically connected to each other. The second grounding protrusion 321 can be inserted into the socket of the third electrical connection terminal 431, and the second wiring protrusion 322 can be inserted into the socket of the fourth electrical connection terminal 432, thereby electrically connecting the second voltage bus component 30 to the connecting component 40.

[0095] In some embodiments of this application, the second cover 203122 is provided with a first through hole and a second through hole spaced apart, the first terminal 23 passes through the first through hole and extends out, and the second terminal 33 passes through the second through hole and extends out.

[0096] In the above embodiments, the provision of the first through hole and the second through hole in the second cover 203122 can help to miniaturize the electrode.

[0097] In some other embodiments of this application, the drive unit 12 includes a cylinder, which is drivenly connected to the suction unit 11. The cylinder can drive the suction unit 11 to move up and down, thereby enabling the electrical connection and disconnection of the first voltage bus member 20 and the second voltage bus member 30 with the connecting member 40.

[0098] In some embodiments of this application, the housing 200 includes a housing 202, a first cover 201, and a second cover 203. The housing 202 has a cavity with openings at both ends. The first cover 201 covers one opening of the cavity. The second cover 203 covers the other opening of the cavity. The rotor assembly 400 also includes a bearing 404 sleeved on the outer periphery of the rotating shaft 401, through which the rotating shaft 401 rotatably passes via the bearing 404 through the first cover 201.

[0099] In some embodiments of this application, a first sealing ring is provided between the first cover 201 and the housing 202, and a second sealing ring is also provided between the second cover 203 and the housing 202. Furthermore, adhesive can be applied to the contact surfaces of the first cover 201 and the housing 202, and adhesive can also be applied to the contact surfaces of the second cover 203 and the housing 202 to improve the sealing effect.

[0100] In some embodiments of this application, the dual-voltage motor 1000 further includes an elastic limiting member 500 located between the bearing 404 and the first cover 201. The elastic limiting member 500 is provided to restrict the axial movement of the bearing 404.

[0101] In some embodiments of this application, the elastic limiting member 500 may be a wave-shaped gasket.

[0102] In some embodiments of this application, the dual-voltage motor 1000 further includes a position sensor 600, fixed to the second cover 203 and electrically connected to the stator assembly 300 and / or the rotor assembly 400. The position sensor 600 is provided to monitor the offset of the stator assembly and the rotor assembly 400, thereby enabling timely maintenance.

[0103] In addition, in some embodiments of this application, the dual-voltage motor 1000 may also include an angle sensor fixed to the second cover 203 and electrically connected to the stator assembly 300 and / or the rotor assembly 400, for monitoring angle changes of the stator assembly 300 and the rotor assembly 400, thereby enabling timely maintenance.

[0104] Power unit

[0105] Secondly, this application provides a power device, including a dual-voltage motor as described in any embodiment of the first aspect of this application.

[0106] In this application, the power unit may be a vehicle, aerospace vehicle, marine transport vehicle, air transport vehicle, etc.

[0107] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A dual-voltage motor, characterized in that, include: The casing has a cavity; A stator assembly is fixed within the cavity, and the stator assembly has stator windings; A rotor assembly, the rotor assembly including a rotating shaft and a magnetic element fixedly connected to the rotating shaft and configured to rotate together with the rotating shaft, the magnetic element being disposed within the stator winding, the rotating shaft being configured to pass through a cavity of the stator assembly and the housing; A voltage switching assembly includes an engaging component, a first voltage busbar, a second voltage busbar, and a connecting component. The connecting component is electrically connected to the stator assembly. The first and second voltage busbars are electrically connected or disconnected from the connecting component in response to the engaging and disengaging of the engaging component, so that the dual-voltage motor switches between different voltages. The suction component includes a suction part, and the first voltage bus component and the second voltage bus component are respectively arranged circumferentially around the suction part and can move with the suction part; And a drive unit, which is driven to connect with the suction unit, for driving the suction unit to engage or disengage with the drive unit, so that the dual-voltage motor switches between different voltages; The suction part includes a first cylinder, a first cover and a first iron core. The first cylinder has a first receiving cavity with openings at both ends. The first cover is connected to the outer peripheral wall of the first cylinder. The first iron core is located in the first receiving cavity and is connected to the first cover, so that the first voltage busbar and the second voltage busbar arranged around the first cylinder can move with the first cylinder. The driving unit includes a second cylinder, a second cover, a coil, a spring, and a second iron core. The second cylinder has a second receiving cavity with openings at both ends. The second cover covers the opening of the second receiving cavity away from the second cylinder. The coil is located inside the second receiving cavity and wound around the outer surface of the second iron core. The spring is located between the first cover and the second cylinder. The second iron core is located inside the second receiving cavity and includes a first end and a second end connected to each other. The first end is connected to the second cover, and there is a gap between the second end and the cavity wall of the second receiving cavity.

2. The dual-voltage motor according to claim 1, characterized in that, The stator winding includes: A stator lamination assembly has a plurality of stator teeth spaced apart and a first through hole formed by the plurality of stator teeth, and the magnetic element is located in the first through hole; A rotating magnetic field winding having multiple phases is disposed on the stator teeth and connected to the connecting member.

3. The dual-voltage motor according to claim 2, characterized in that, The magnetic component includes: The rotor lamination assembly is located in the first through hole of the stator lamination assembly. The rotor lamination assembly has a second through hole and a mounting groove. The rotor lamination assembly is interference-fitted with the rotating shaft through the second through hole. A magnetic object is located within the mounting slot.

4. The dual-voltage motor according to claim 1, characterized in that, The driving unit includes a cylinder, which is drivenly connected to the suction unit.

5. The dual-voltage motor according to claim 1, characterized in that, The housing includes: A housing having the cavity open at both ends; A first cover is provided to cover an opening in the cavity; A second cover is provided at another opening of the cavity; The rotor assembly further includes a bearing sleeved on the outer periphery of the rotating shaft, through which the rotating shaft can rotatably pass through the first cover.

6. The dual-voltage motor according to claim 5, characterized in that, The dual-voltage motor also includes an elastic limiting member located between the bearing and the first cover.

7. The dual-voltage motor according to claim 5, characterized in that, The dual-voltage motor also includes a position sensor, which is fixed to the second cover and electrically connected to the stator assembly and / or the rotor assembly.

8. A power unit, characterized in that, Includes the dual-voltage motor as described in claim 7.

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