Electromagnetic apparatus, electric driving apparatus, electric driving system and electric device

Abstract

The present application provides an electromagnetic apparatus (100), an electric driving apparatus (10), an electric driving system (1), and an electric device. The electromagnetic apparatus (100) comprises a stator (101), a rotor (102), and a current measurement assembly (103). The rotor (102) is provided with lead-out wires (1023). The lead-out wires (1023) pass through a ring of a first magnetic core (1031). One of the lead-out wires (1023) is a first lead-out wire (1023a), and the remaining lead-out wire (1023) is a second lead-out wire (1023b). A second section (10232) of the second lead-out wire (1023b) is magnetically shielded. The current measurement assembly (103) is used for being magnetically coupled to a first section (10231) of the first lead-out wire (1023a) and for sensing the current of the first lead-out wire (1023a). Thus, the structure of the rotor (102) is lightweight, thereby reducing the centrifugal force of the rotor (102).

Description

Electromagnetic device, electric drive device, electric drive system and electric device

[0001] Cross-reference to Related Applications

[0002] This application claims priority to the Chinese patent application No. 202410438935.1, filed on April 11, 2024, and entitled "Electromagnetic device, electric drive device, electric drive system and electric device", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] Embodiments of the present application relate to the field of electric drive, and in particular, to an electromagnetic device, an electric drive device, an electric drive system and an electric device. BACKGROUND

[0004] The electromagnetic device, such as a resolver, a motor, etc., which applies the principle of electromagnetic induction, usually includes a stator, a rotor and a current detection assembly. The stator is fixedly arranged, the rotor is rotatable relative to the stator, and the current detection assembly is used to detect the rotor current. In some cases, the current detection assembly is sleeved with a Rogowski coil on the lead-out wire of the rotor, and the Rogowski coil is used as the current detection component to sense the rotor current. However, the Rogowski coil increases the weight of the rotor, which increases the centrifugal force of the rotor, resulting in poor reliability and stability of the electromagnetic device. SUMMARY

[0005] Embodiments of the present application provide an electromagnetic device, an electric drive device, an electric drive system and an electric device, which aims to solve the problem that the current detection assembly sets the current detection component on the rotor, which increases the weight and centrifugal force of the rotor.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the embodiments of the present application is as follows:

[0007] In a first aspect, an electromagnetic device is provided, which includes:

[0008] a stator;

[0009] a rotor having at least two lead-out wires;

[0010] a current detection assembly including a first magnetic core and a first winding, the first magnetic core being arranged in a ring shape, and the first winding being installed on the first magnetic core and electrically connected with an external detection element;

[0011] The lead-out wires are arranged in the ring of the first magnetic core; one of the lead-out wires is a first lead-out wire, and the rest of the lead-out wires are second lead-out wires; the first lead-out wire has a first segment arranged opposite to the first magnetic core along the radial direction of the first magnetic core, and the second lead-out wire has a second segment arranged opposite to the first magnetic core along the radial direction of the first magnetic core; the second segment of the second lead-out wire is magnetically shielded, and the current detection assembly is used for magnetic coupling with the first segment of the first lead-out wire and sensing the current of the first lead-out wire.

[0012] The electromagnetic device provided by the embodiment of the present application can form a current detection assembly with a simplified structure through the first magnetic core in a ring shape and surrounding the periphery of each lead-out wire of the rotor and the first winding installed on the first magnetic core, so as to conveniently, quickly and accurately measure the current of the first lead-out wire and obtain the current of the rotor.

[0013] The current detection assembly provided by the embodiment needs to use the lead-out wire of the rotor, but does not need to add additional components such as a current detection component on the rotor side, so as to facilitate the lightweight structure of the rotor, reduce the weight of the rotor, reduce the centrifugal force of the rotor, and improve the reliability and stability of the operation of the electromagnetic device.

[0014] The current detection assembly provided by the embodiment mainly magnetically couples the first magnetic core with the first segment of the first lead-out wire through the magnetic field, and there is no friction between the current detection assembly and the rotor, so as to reduce the wear risk of the first magnetic core and the first winding of the current detection assembly, prolong the service life of the first magnetic core and the first winding of the current detection assembly, and improve the reliability and maintainability of the current detection assembly.

[0015] In some embodiments, the electromagnetic device includes a rotating support, the rotor is sleeved outside the rotating support, and the first segment of the first lead-out wire is arranged between the rotating support and the first magnetic core.

[0016] By adopting the above scheme, the rotating support can be provided, and the rotor is sleeved outside the periphery of the rotating support, so that the rotating support can provide stable support for the rotor. Based on this, the rotor can maintain the required position and posture during rotation, the stability and reliability of the rotor during rotation can be improved, and the friction and wear of the rotor during rotation can be reduced, thereby helping to improve the stability and reliability of the operation of the electromagnetic device.

[0017] By adopting the above scheme, the first segment of the first lead-out wire can be arranged between the rotating support and the first magnetic core, so as to reduce the risk that the rotating support blocks the first segment of the first lead-out wire and the first magnetic core. Based on this, the risk that the magnetic field of the first segment of the first lead-out wire is weakened by the rotating support can be reduced, so that the magnetic field of the first magnetic core and the first segment of the first lead-out wire can be directly and undisturbedly magnetically coupled, the current detection assembly can accurately sense the current of the first lead-out wire, and the detection accuracy of the current detection assembly can be improved.

[0018] In some embodiments, the rotating support is a metal cylindrical structure, a through hole is formed through the wall of the rotating support, and the second segment of the at least one second lead wire is arranged in the rotating support.

[0019] By adopting the above scheme, in the case that the second segment of the second lead wire arranged in the through hole is electrified and generates a magnetic field, the rotating support which is a metal cylindrical structure and a metal conductor can be affected by the magnetic field and induce eddy current, so as to cancel the magnetic field of the part of the second segment arranged in the rotating support. Thus, the rotating support can be used as a magnetic shielding component to magnetically shield part or all of the second segment of the second lead wire, so as to reduce the risk that the magnetic field of the second segment of the second lead wire interferes with the magnetic coupling between the first magnetic core and the first segment, facilitate the targeted and reliable magnetic coupling between the first magnetic core and the magnetic field of the first segment of the first lead wire, facilitate the accurate and reliable induction of the current detection assembly to the current of the first lead wire, and improve the detection reliability and detection accuracy of the current detection assembly. Moreover, the rotating support as a magnetic shielding component can also reduce the number of magnetic shielding components directly added to the second lead wire, so as to reduce the number of components of the electromagnetic device, simplify the structure of the electromagnetic device, and reduce the cost of the electromagnetic device.

[0020] In some embodiments, the through hole is arranged in the axial direction of the first magnetic core, and the second segment of the second lead wire arranged in the through hole is entirely arranged in the rotating support.

[0021] By adopting the above scheme, by arranging the through hole in the axial direction of the first magnetic core, the second segment of the second lead wire arranged in the through hole can be entirely arranged in the cylinder of the rotating support. Based on this, in the case that the second segment of the second lead wire is electrified and generates a magnetic field, the rotating support can be directly used as a magnetic shielding component to magnetically shield all of the second segment of the second lead wire and completely cancel the magnetic field of the second segment of the second lead wire. Thus, the magnetic shielding effect of the rotating support on the second segment of the second lead wire can be optimized, and the risk that the rotating support needs to cooperate with other magnetic shielding components to magnetically shield the second segment of the second lead wire can be reduced.

[0022] In some embodiments, the second segment of the at least one second lead wire is arranged between the rotating support and the first magnetic core, and a shielding sleeve is arranged around the second segment arranged between the rotating support and the first magnetic core.

[0023] By adopting the above scheme, for the second lead-out wire arranged between the rotating support and the first magnetic core, the second segment of the second lead-out wire can be magnetically shielded by sleeving a shielding sleeve on the outer periphery of the second segment of the second lead-out wire, so as to realize magnetic shielding of the second segment of the second lead-out wire through the shielding sleeve as a magnetic shielding component, thereby reducing the risk of the magnetic field of the second segment of the second lead-out wire interfering with the magnetic coupling between the first magnetic core and the first segment, facilitating the targeted and reliable magnetic coupling of the first magnetic core with the magnetic field of the first segment of the first lead-out wire, facilitating the accurate and reliable current sensing of the current detection assembly, and improving the detection reliability of the current detection assembly. Moreover, the shielding sleeve is relatively light and does not significantly increase the weight and centrifugal force of the rotor. Moreover, the shielding sleeve as a magnetic shielding component can reduce the number of through holes provided in the rotating support, thereby facilitating the processing convenience of the rotating support and reducing the manufacturing cost of the rotating support.

[0024] In some embodiments, the at least one shielding sleeve is an electrically conductive metal piece.

[0025] By adopting the above scheme, the shielding sleeve can be an electrically conductive metal piece, so that the shielding sleeve has a high electrical conductivity and can constitute a metal conductor. Based on this, in the case that the second segment passing through the shielding sleeve is electrified and generates a magnetic field, the shielding sleeve can be affected by the magnetic field of the second segment passing therethrough and induce eddy currents to cancel the magnetic field of the second segment passing therethrough. Thus, the shielding sleeve can reliably shield the second segment passing therethrough, i.e., the magnetic shielding effect of the shielding sleeve can be optimized.

[0026] In some embodiments, the material of the electrically conductive metal piece includes at least one of gold, silver, copper, aluminum, iron, and alloy.

[0027] By adopting the above scheme, the electrical conductivity of the electrically conductive metal piece can be improved, thereby enhancing the strength of the eddy currents of the shielding sleeve of the electrically conductive metal piece, facilitating the effective and reliable cancellation of the magnetic field of the second segment passing through the shielding sleeve of the electrically conductive metal piece, and optimizing the magnetic shielding effect of the shielding sleeve of the electrically conductive metal piece.

[0028] In some embodiments, the at least one shielding sleeve is a magnetic conductive piece.

[0029] By adopting the above scheme, the shielding sleeve can be a magnetic conductive piece, so that the shielding sleeve has a high magnetic permeability. Based on this, in the case that the second segment passing through the shielding sleeve is electrified and generates a magnetic field, the shielding sleeve can guide and concentrate the magnetic field of the second segment passing therethrough to the inside of the shielding sleeve, thereby hindering the magnetic field of the second segment passing therethrough from spreading and leaking to the outside. Thus, the shielding sleeve can reliably shield the second segment passing therethrough, i.e., the magnetic shielding effect of the shielding sleeve can be optimized.

[0030] In some embodiments, the material of the magnetic conducting member comprises at least one of silicon steel sheet, ferrite, microcrystalline, ultra-microcrystalline, and permalloy.

[0031] By adopting the above scheme, the magnetic permeability of the magnetic conducting member can be improved, so that the magnetic field concentrating effect of the shielding sleeve for the magnetic conducting member can be enhanced, the magnetic field of the second segment penetrating through the shielding sleeve can be reliably concentrated in the shielding sleeve, and the magnetic shielding effect of the shielding sleeve for the magnetic conducting member can be optimized.

[0032] In some embodiments, the first winding is a coil winding, and the first winding is wound around the first magnetic core.

[0033] By adopting the above scheme, by making the first winding be a coil winding wound around the first magnetic core, on the one hand, the shape, size, number of turns, etc. of the first winding can be flexibly designed and adjusted according to actual application requirements, so that the design and assembly flexibility of the first winding can be improved, and the first winding can meet specific electromagnetic performance requirements. On the other hand, the first winding can have high output power and working efficiency, and can effectively transmit electric energy, thereby reducing energy loss during electric energy transmission of the first winding.

[0034] In some embodiments, the first winding comprises two annular PCB (Printed Circuit Board) windings, the two PCB windings are arranged on opposite sides of the first magnetic core along the axial direction of the first magnetic core, the two PCB windings are electrically connected to each other at the inner ring side thereof, and the two PCB windings are electrically connected to each other at the outer ring side thereof.

[0035] By adopting the above scheme, the two annular PCB windings can be arranged on opposite sides of the first magnetic core along the axial direction of the first magnetic core, and the two PCB windings can be electrically connected to each other at the inner ring side thereof and electrically connected to each other at the outer ring side thereof, so that the two PCB windings can be wound around the first magnetic core together to form the first winding. Based on this, on the one hand, a double-winding-like structure can be formed by the two PCB windings, so that the electromagnetic conversion efficiency of the first winding can be improved. On the one hand, the occupied space of the PCB winding in the axial direction of the first magnetic core can be compressed to compact the occupied space of the first winding in the axial direction of the first magnetic core, thereby helping to reduce the height of the current detection assembly in the axial direction of the first magnetic core, and facilitating the integration and thinning of the current detection assembly. On the one hand, the wiring of the first winding can be simplified, the number and complexity of the connection lines of the first winding can be reduced, the production cost of the PCB winding and the first winding can be reduced, and the production and assembly convenience of the PCB winding and the first winding can be improved.

[0036] In some embodiments, one of the PCB windings is provided with first conductive terminals, and the other of the PCB windings is provided with second conductive terminals corresponding to the first conductive terminals and being plugged into the first conductive terminals.

[0037] By adopting the above scheme, on at least one of the inner ring side and the outer ring side of the two PCB windings, the two PCB windings can be electrically connected to each other through the second conductive terminals corresponding to the first conductive terminals and being plugged into the first conductive terminals, so as to facilitate, expedite and reliably realize the electrical connection between the two PCB windings. Based on this, the assembly convenience and efficiency between the two PCB windings can be improved, the stability of the relative position between the two PCB windings can be improved, and the convenience, reliability and stability of the electrical connection between the two PCB windings can be improved.

[0038] In some embodiments, the first magnetic core is a single-layer structure.

[0039] By adopting the above scheme, by making the first magnetic core a single-layer structure, on one hand, the manufacturing process of the first magnetic core can be simplified, the production convenience and efficiency of the first magnetic core can be improved, the defects and errors possibly introduced in the production process of the first magnetic core can be reduced, and the production cost of the first magnetic core can be reduced. On the other hand, the integrity and mechanical strength of the first magnetic core can be improved, the risk of damage or deformation of the first magnetic core under external force or vibration can be reduced, and the service life of the first magnetic core and the current detection assembly can be prolonged. On the other hand, the magnetic flux path of the first magnetic core can be made direct and short, the loss of the magnetic flux in the first magnetic core can be reduced, and the utilization efficiency of the magnetic flux by the first magnetic core can be improved.

[0040] In some embodiments, the first magnetic core is a multi-layer structure.

[0041] By adopting the above scheme, by making the first magnetic core a multi-layer structure, the structure and performance (such as magnetic performance, mechanical strength, heat dissipation performance, etc.) of the first magnetic core can be optimized by adjusting the materials, thicknesses, etc. of different layers, so as to improve the design flexibility of the structure of the first magnetic core, and the first magnetic core can be adapted to different application requirements.

[0042] In some embodiments, the first magnetic core includes a plurality of soft magnetic films arranged in layers.

[0043] By adopting the above scheme, by sequentially stacking the plurality of soft magnetic films along the axial direction of the first magnetic core and jointly forming the first magnetic core, on the one hand, the first magnetic core can also perform well under high-frequency working conditions through the characteristics of low coercivity and high magnetic permeability of the soft magnetic film, so that the first magnetic core can realize efficient magnetic flux conversion and reduce energy loss. On the one hand, the thickness, material and number of layers of the soft magnetic film can be adjusted to flexibly control the overall magnetic performance (including permeability, saturation magnetic induction intensity, etc.) of the first magnetic core, thereby improving the design flexibility of the structure of the first magnetic core and enabling the first magnetic core to adapt to different application requirements. On the one hand, since the soft magnetic film has good processing performance and is easy to cut and shape, the production convenience, assembly convenience and assembly efficiency of the first magnetic core can be improved, and the production cost of the first magnetic core can be reduced.

[0044] In a second aspect, an electric drive device is provided, which includes the electromagnetic device provided in the embodiments.

[0045] By adopting the above scheme, the electric drive device can improve the operation reliability, operation stability and maintainability of the electric drive device by applying the electromagnetic device provided in the embodiments.

[0046] In some embodiments, the electromagnetic device is a rotary transformer, and the electric drive device further includes a motor including a motor rotor and a motor stator, and the rotor of the electromagnetic device is connected to the motor rotor.

[0047] By adopting the above scheme, in the case where the electric drive device includes a motor, the electromagnetic device provided in the embodiments can be applied as a rotary transformer, and the rotor of the electromagnetic device is connected to the motor rotor, so that the induced current of the rotor of the electromagnetic device can carry the state information such as the position and rotation speed of the motor rotor. Based on this, the induced current of the rotor of the electromagnetic device can be conveniently, quickly and accurately measured by the current detection component of the electromagnetic device, so that the state information such as the rotation speed and position of the motor rotor can be conveniently, quickly and accurately obtained.

[0048] In a third aspect, an electric drive system is provided, which includes a battery and the electric drive device provided in the embodiments, and the battery is electrically connected to the electric drive device.

[0049] By adopting the above scheme, the electric drive system can improve the operation reliability, operation stability and working performance of the electric drive system by applying the electric drive device provided in the embodiments.

[0050] In a fourth aspect, an electric device is provided, which includes the electric drive system provided in the embodiments.

[0051] By adopting the above scheme, the electric device can improve the operation reliability, operation stability and working performance of the electric device by applying the electric drive system provided in the embodiments of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0052] In order to clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below only show some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0053] Fig. 1 is a structural schematic diagram of a vehicle provided in some embodiments of the present application;

[0054] Fig. 2 is an exploded schematic diagram of a battery provided in some embodiments of the present application;

[0055] Fig. 3 is a three-dimensional schematic diagram of an electromagnetic device provided in some embodiments of the present application, wherein the second segment of the second lead-out wire is arranged in the rotating support;

[0056] Fig. 4 is a three-dimensional sectional view of the electromagnetic device provided in Fig. 3;

[0057] Fig. 5 is an equivalent circuit diagram of the electromagnetic device provided in some embodiments of the present application;

[0058] Fig. 6 is a three-dimensional schematic diagram of an electromagnetic device provided in other embodiments of the present application, wherein the second segment of the second lead-out wire is arranged between the rotating support and the first magnetic core, and a shielding sleeve is arranged on the outer periphery of the second segment;

[0059] Fig. 7 is a three-dimensional sectional view of the electromagnetic device provided in Fig. 6;

[0060] Fig. 8 is a three-dimensional schematic diagram of an electromagnetic device provided in other embodiments of the present application, wherein the first winding includes two PCB windings;

[0061] Fig. 9 is an exploded schematic diagram of a current detection assembly provided in Fig. 8;

[0062] Fig. 10 is an exploded schematic diagram of a current detection assembly provided in other embodiments of the present application, wherein the first magnetic core includes a plurality of soft magnetic films arranged in a stack.

[0063] In the drawings, reference numerals: 1-electric drive system, 2-vehicle body; 10-electric drive device, 20-battery; 21-battery unit, 22-box, 221-first part, 222-second part; 100-electromagnetic device, 101-stator, 1011-stator magnetic core, 1012-stator winding, 102-rotor, 1021-rotor magnetic core, 1022-rotor winding, 1023-lead wire, 1023a-first lead wire, 1023b-second lead wire, 10231-first segment, 10232-second segment, 103-current detection assembly, 1031-first magnetic core, 10311-soft magnetic film, 1032-first winding, 10321-PCB winding, 10322-first conductive terminal, 10323-second conductive terminal, 104-rotary support, 1041-through hole, 105-shielding sleeve; 200-external detection element, z-axis direction of the first magnetic core, Is-current of the first lead wire, Uo-voltage of the first winding, Isen-current of the first winding. DETAILED DESCRIPTION

[0064] In order to make the technical problems to be solved by the present application, the technical solutions and beneficial effects clear, the present application will be described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application, and are not used to limit the present application.

[0065] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0066] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0067] In this application, unless specifically defined otherwise, the terms "mounting", "connected", "connection", "fixed", and the like should be construed broadly and do not necessarily mean fixedly connected, but can also mean detachably connected, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0068] The electromagnetic device such as a resolver, a motor, etc. applies the principle of electromagnetic induction, generally includes a stator and a rotor, the stator is fixedly arranged, and the rotor can rotate relative to the stator. Since the current of the rotor is an important physical quantity, it can provide an important basis for the normal operation and fault diagnosis of the electromagnetic device, therefore, the electromagnetic device can further include a current detection assembly for detecting the current of the rotor.

[0069] In some cases, the current detection assembly includes a Rogowski coil, a slip ring and a brush. The Rogowski coil is sleeved on one lead-out wire of the rotor, and the Rogowski coil can be used as a current detection component for sensing the current of the rotor. The slip ring is fixed on the rotating shaft of the rotor and connected with the Rogowski coil, and the brush is fixed on the shell framework of the electromagnetic device and keeps contact with the slip ring, and the brush is connected with a signal conditioning module and can transmit the current signal on the rotor side to the signal conditioning module.

[0070] However, the arrangement of the Rogowski coil and the slip ring increases the weight of the rotor, resulting in an increase in the centrifugal force of the rotor, which causes poor reliability and stability of the operation of the electromagnetic device. Moreover, during the rotation of the rotor, the brush and the slip ring will rub against each other, resulting in wear of the brush, which requires regular replacement, resulting in poor maintainability and reliability of the current detection assembly.

[0071] Therefore, some embodiments of the present application provide an electromagnetic device, which can form a simplified current detection assembly through a first magnetic core in the form of a ring and surrounding the periphery of each lead-out wire of the rotor, and a first winding installed on the first magnetic core, to facilitate, quickly and accurately measure the current of the first lead-out wire, thereby obtaining the current of the rotor. The current detection assembly provided by the present embodiment needs to borrow the lead-out wire of the rotor, but does not need to add additional components such as current detection components on the rotor side, thereby facilitating the structure of the rotor, reducing the weight of the rotor, reducing the centrifugal force of the rotor, and improving the reliability and stability of the operation of the electromagnetic device. The current detection assembly provided by the present embodiment mainly magnetically couples the magnetic field of the first segment of the first lead-out wire through the first magnetic core, and there is no friction between the first magnetic core and the first winding of the current detection assembly and the rotor, thereby reducing the wear risk of the first magnetic core and the first winding of the current detection assembly, prolonging the service life of the first magnetic core and the first winding of the current detection assembly, and improving the reliability and maintainability of the current detection assembly.

[0072] The electromagnetic device provided by the embodiments of the present application can be a resolver, a motor, etc. The electromagnetic device provided by the embodiments of the present application can be applied to an electric device. The electric device can be, but is not limited to, a vehicle, an electric toy, an electric tool, an electric bicycle, an electric motorcycle, a ship, a spacecraft, etc. The vehicle can be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile, or a range extended automobile, etc. The electric toy can include a fixed or mobile electric toy, such as a game machine, an electric automobile toy, an electric ship toy, an electric aircraft toy, etc. The spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembling electric tool, and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator, an electric planer, etc.

[0073] In order to illustrate the technical solutions provided by the present application, the following will be described in detail in combination with specific drawings and embodiments, and taking the electric device as a vehicle as an example.

[0074] Please refer to FIG. 1, which is a structural schematic diagram of a vehicle provided by some embodiments of the present application. According to the power source, the vehicle can be a pure electric automobile, a hybrid electric automobile, or a range extended automobile, etc. According to the driving mode, the vehicle can be a front drive automobile, a rear drive automobile, or a four-wheel drive automobile. The vehicle includes an electric driving system 1 and a vehicle body 2.

[0075] The vehicle body 2 is the main supporting component of the vehicle, and the vehicle body 2 has a cabin and a passenger cabin. The cabin is used to accommodate the power mechanism, the electric control mechanism, the transmission mechanism, etc. of the vehicle, and the passenger cabin is used to provide the operating space and the seating space for the driver and passengers. When the vehicle is a front drive automobile, the cabin is arranged at the head of the vehicle body 2, i.e., the cabin is a front cabin; when the vehicle is a rear drive automobile, the cabin is arranged at the tail of the vehicle body 2, i.e., the cabin is a rear cabin; when the vehicle is a four-wheel drive automobile, the cabin is divided into a front cabin and a rear cabin, the front cabin is arranged at the head of the vehicle body 2, and the rear cabin is arranged at the tail of the vehicle body 2. The passenger cabin is arranged between the head and the tail of the vehicle body 2.

[0076] The electric driving system 1 is the power system of the vehicle, and is used to convert electric energy into mechanical energy and output the mechanical energy to the wheels of the vehicle to drive the vehicle to run. The electric driving system 1 is arranged on the vehicle body 2. In some embodiments, part of the electric driving system 1 can be arranged in the cabin, and another part of the electric driving system 1 can be arranged at the bottom of the vehicle body 2.

[0077] Please refer to FIG. 1, the electric driving system 1 provided by the embodiments of the present application includes an electric driving device 10 and a battery 20. The battery 20 is used to provide electric energy for the electric driving device 10, and the battery 20 can be arranged at the bottom, the head, or the tail of the vehicle.

[0078] The electric drive device 10 is used to convert the electric energy provided by the battery 20 into mechanical energy and output the mechanical energy to the wheels of the vehicle to drive the vehicle. The electric drive device 10 is installed in the engine compartment. In the case of a front-wheel drive vehicle, the electric drive device 10 is installed in the front engine compartment and used to output the mechanical energy to the front wheels of the vehicle to drive the vehicle. In the case of a rear-wheel drive vehicle, the electric drive device 10 is installed in the rear engine compartment and used to output the mechanical energy to the rear wheels of the vehicle to drive the vehicle. In the case of a four-wheel drive vehicle, there are two electric drive devices 10, one of which is installed in the front engine compartment and used to output the mechanical energy to the front wheels of the vehicle, and the other of which is installed in the rear engine compartment and used to output the mechanical energy to the rear wheels of the vehicle to drive the vehicle.

[0079] The electric drive device 10 includes an electric machine (also referred to as a motor), which is the main power output component of the electric drive device 10 and is used to convert the electric energy provided by the battery 20 into mechanical energy. The electric machine includes a rotor and a stator. The stator of the electric machine generates a stator magnetic field around it when energized. The rotor of the electric machine rotates relative to the stator of the electric machine based on the principle of electromagnetic induction, thereby achieving the conversion of electric energy into mechanical energy.

[0080] In some embodiments, the electric drive device 10 further includes a resolver, which is used to detect the speed, position, and other information of the rotor of the electric machine. The resolver includes a rotor and a stator. The stator of the resolver is connected to the electric machine controller and generates a stator magnetic field around it when the electric machine controller provides an excitation voltage to it. The rotor of the resolver is connected to the rotor of the electric machine and rotates with the rotor of the electric machine. The rotor of the resolver generates an induced current during rotation based on the principle of electromagnetic induction. The induced current changes with changes in the position, speed, and other states of the rotor of the electric machine, i.e., carries the state information of the rotor of the electric machine. An external detection component can detect the induced current to obtain the speed, position, and other state information of the rotor of the electric machine.

[0081] Of course, the electric drive device 10 can also include other structures. For example, the electric drive device 10 can also include a transmission mechanism (not shown in the figure), which is a power transmission mechanism of the electric drive device 10. The transmission mechanism has a power input end and a power output end. The power input end of the transmission mechanism is connected to the electric machine, and the power output end of the transmission mechanism is connected to the wheels of the vehicle to transmit the mechanical energy to the wheels of the vehicle by changing the speed and torque of the electric machine. For another example, the electric drive device 10 can also include a controller (not shown in the figure), which is used to convert the direct current output by the battery 20 into alternating current and deliver the alternating current to the electric machine, and is also used to control the operation of the electric machine (e.g., control the start and stop, speed, torque, and other parameters of the electric machine).

[0082] Please refer to FIG. 2, which is an exploded schematic view of a battery 20 according to some embodiments of the present application. The battery 20 comprises a battery cell 21 and a case 22, wherein the battery cell 21 is accommodated in the case 22.

[0083] The case 22 is used to provide accommodation space for the battery cell 21 and other components. The case 22 can provide dustproof, waterproof and protective functions for the battery cell 21 and other components accommodated therein, so as to reduce the influence of external liquid or other foreign matters on the performance of the battery cell 21 and other components, and effectively prolong the service life of the battery 20.

[0084] In some embodiments, the case 22 can comprise a first part 221 and a second part 222, wherein the first part 221 and the second part 222 are mutually coverable, and the first part 221 and the second part 222 jointly define an accommodation space for accommodating the battery cell 21. The second part 222 can be a hollow structure with one end open, and the first part 221 can be a plate-shaped structure, which is coverable on the open end of the second part 222 to jointly define the accommodation space with the second part 222. Alternatively, the first part 221 and the second part 222 can both be hollow structures with one side open, and the open end of the first part 221 is coverable on the open end of the second part 222.

[0085] In some embodiments, the case 22 can be in various shapes, such as a cylinder, a cuboid, etc.

[0086] In some embodiments, the case 22 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0087] The battery cell 21 is an energy storage unit capable of converting chemical energy into electrical energy. In the battery 20, one battery cell 21 can be provided, or at least two battery cells 21 can be provided. In the case where at least two battery cells 21 are provided, the at least two battery cells 21 can be connected in series, in parallel or in a mixed manner. The mixed connection means that the at least two battery cells 21 are connected in series and in parallel.

[0088] In some embodiments, the battery cell 21 can be a battery monomer. The at least two battery monomers can be directly connected in series, in parallel or in a mixed manner, and the whole of the at least two battery monomers is accommodated in the case 22. The battery monomer can be a lithium ion secondary battery monomer, a lithium-sulfur battery monomer, a sodium-lithium ion battery monomer, a sodium ion battery monomer or a magnesium ion battery monomer, etc. The battery monomer can be in various shapes, such as a cylinder, a flat body, a cuboid or other shapes, etc. The battery monomer can be packaged in different ways to form a cylindrical battery monomer, a square battery monomer or a soft-pack battery monomer, etc.

[0089] Alternatively, the battery unit 21 can be a battery module or a battery pack. At least two battery cells can be connected in series or in parallel or in a hybrid manner to form a modular structure, i.e., a battery module or a battery pack; at least two battery modules or battery packs are connected in series or in parallel or in a hybrid manner to form a whole and are accommodated in the box 22.

[0090] Of course, the battery 20 can also include other structures. For example, the battery 20 can also include a busbar component (not shown in the figure) for realizing the electrical connection between the at least two battery units 21. For another example, the battery 20 can also include a power distribution device (not shown in the figure) for being used as a control unit for distributing the energy of the battery 20 and for high-voltage distribution of the battery 20.

[0091] Of course, in some embodiments, the battery 20 can not include the box 22, but the at least two battery cells are electrically connected and assembled by necessary fixing structures to form a whole.

[0092] Referring to FIGS. 3, 4 and 5, some embodiments of the present application provide an electromagnetic device 100, which can be a motor, a resolver or other devices applying the principle of electromagnetic induction. The electromagnetic device 100 can be applied in the electric drive device 10 (as shown in FIG. 1).

[0093] The electromagnetic device 100 includes a stator 101, a rotor 102 and a current detection assembly 103. The rotor 102 has at least two lead-out wires 1023. The current detection assembly 103 includes a first magnetic core 1031 and a first winding 1032. The first magnetic core 1031 is arranged in a ring shape. The first winding 1032 is mounted on the first magnetic core 1031 and is electrically connected with an external detection element 200. The lead-out wires 1023 pass through the ring of the first magnetic core 1031. One of the lead-out wires 1023 is a first lead-out wire 1023a, and the rest of the lead-out wires 1023 are second lead-out wires 1023b. The first lead-out wire 1023a has a first segment 10231 opposite to the first magnetic core 1031 along a radial direction of the first magnetic core 1031, and the second lead-out wire 1023b has a second segment 10232 opposite to the first magnetic core 1031 along the radial direction of the first magnetic core 1031. The second segment 10232 of the second lead-out wire 1023b is magnetically shielded. The current detection assembly 103 is configured to be magnetically coupled with the first segment 10231 of the first lead-out wire 1023a and to sense a current Is of the first lead-out wire 1023a.

[0094] It is to be noted that the stator 101 is a component that is stationary and used to generate a stator magnetic field in the electromagnetic device 100. The structure of the stator 101 can be flexibly designed. As shown in FIG. 4, in some embodiments, the stator 101 includes a stator magnetic core 1011 and a stator winding 1012, the stator magnetic core 1011 is a component with high magnetic permeability, and the stator winding 1012 can be installed inside the stator magnetic core 1011. The stator winding 1012 can generate an initial magnetic field inside the stator 101 under the condition of being energized, and the stator magnetic core 1011 can guide the flow of magnetic flux and effectively enhance and concentrate the magnetic field generated by the stator winding 1012, so that the stator 101 can cooperatively form a stable and powerful stator magnetic field through the stator magnetic core 1011 and the stator winding 1012. The stator magnetic core 1011 can be, but is not limited to, a ferrite magnetic core, an amorphous alloy magnetic core, a nanocrystalline magnetic core, etc. The stator winding 1012 can be, but is not limited to, a coil winding, a planar conductor winding, an equivalent winding made of a printed circuit board, etc. Of course, in other embodiments, the stator winding 1012 can be wound on the stator magnetic core 1011.

[0095] The rotor 102 is a component that is in the stator magnetic field, can be electromagnetically induced with the stator magnetic field, and can rotate relative to the stator 101. The rotor 102 can be arranged inside the stator magnetic core 1011 of the stator 101 to be in the stator magnetic field; or the rotor 102 can be arranged near (e.g., the outer peripheral side) the stator 101 to be in the stator magnetic field.

[0096] The structure of the rotor 102 can be flexibly designed. As shown in FIG. 4, in some embodiments, the rotor 102 includes a rotor magnetic core 1021 and a rotor winding 1022, the rotor magnetic core 1021 is a component with high magnetic permeability, and the rotor magnetic core 1021 can function to concentrate the magnetic field. The rotor winding 1022 can be installed on the rotor magnetic core 1021, and the rotor winding 1022 can be electromagnetically induced with the stator magnetic field to generate an induced electromotive force or an electromagnetic torque. The rotor magnetic core 1021 can be, but is not limited to, a ferrite magnetic core, an amorphous alloy magnetic core, a nanocrystalline magnetic core, etc. The rotor winding 1022 can be, but is not limited to, a coil winding, a planar conductor winding, an equivalent winding made of a printed circuit board, etc.

[0097] The rotor 102 has at least two lead-out wires 1023. The lead-out wires 1023 can be led out from the rotor winding 1022 and can be used to lead out the current of the rotor 102. The lead-out wires 1023 can be, but are not limited to, conductive cables, etc.

[0098] It is also to be noted that the current detection assembly 103 is a functional assembly for detecting the current of the rotor 102. The current detection assembly 103 includes a first magnetic core 1031 and a first winding 1032. The first magnetic core 1031 is a component with high magnetic permeability, which can be but is not limited to a ferrite core, an amorphous alloy core, a nanocrystalline core, etc. The first magnetic core 1031 is in a ring structure, and the first magnetic core 1031 surrounds the outer periphery of each lead-out wire 1023, i.e., each lead-out wire 1023 is arranged in the ring of the first magnetic core 1031. The first winding 1032 is a component mounted on and wound around the first magnetic core 1031. The first winding 1032 can be but is not limited to a coil winding, a planar conductor winding, an equivalent winding made of a printed circuit board, etc.

[0099] Among the lead-out wires 1023, one of the lead-out wires 1023 is a first lead-out wire 1023a, and the lead-out wire 1023 other than the first lead-out wire 1023a is a second lead-out wire 1023b. The first lead-out wire 1023a has a first section 10231, which is a portion of the first lead-out wire 1023a arranged opposite the first magnetic core 1031 along the radial direction of the first magnetic core 1031. The second lead-out wire 1023b has a second section 10232, which is a portion of the second lead-out wire 1023b arranged opposite the first magnetic core 1031 along the radial direction of the first magnetic core 1031. Here, the radial direction of the first magnetic core 1031 is a direction perpendicular to the central axis of the first magnetic core 1031.

[0100] The second section 10232 of the second lead-out wire 1023b generates a magnetic field in the case of being energized, but the magnetic field of the second section 10232 of the second lead-out wire 1023b is magnetically shielded. In some embodiments, the magnetic field of the second section 10232 of the second lead-out wire 1023b can be completely magnetically shielded by the magnetic shielding component. In other embodiments, the magnetic field of the second section 10232 of the second lead-out wire 1023b can be partially magnetically shielded by the magnetic shielding component and partially magnetically shielded by the local portion of the first section 10231 of the first lead-out wire 1023a.

[0101] The first section 10231 of the first lead-out wire 1023a generates a magnetic field in the case of being energized, and the magnetic field of the first section 10231 of the first lead-out wire 1023a is not completely magnetically shielded. In some embodiments, the magnetic field of the first section 10231 of the first lead-out wire 1023a can not be completely magnetically shielded. In other embodiments, the magnetic field of the first section 10231 of the first lead-out wire 1023a can be partially not magnetically shielded and partially magnetically shielded by the magnetic field of the second section 10232 of the second lead-out wire 1023b.

[0102] Based on this, in the ring of the first magnetic core 1031, only the first segment 10231 of the first outgoing line 1023a can pass through the first magnetic core 1031 in the energized case, so that the first magnetic core 1031 can be magnetically coupled with the magnetic field of the first segment 10231 of the first outgoing line 1023a, so that the first magnetic core 1031 can generate magnetic flux, and the magnetic field strength in the first magnetic core 1031 can change with the change of the current Is of the first outgoing line 1023a. Based on this, the first winding 1032 mounted on or wound around the first magnetic core 1031 can induct the change of the magnetic field of the first magnetic core 1031 to generate an induced electromotive force, and the size of the induced electromotive force is proportional to the size of the current in the first outgoing line 1023a.

[0103] On this basis, the first winding 1032 can be electrically connected with the external detection element 200, so that the external detection element 200 detects the voltage Uo, the current Isen or the induced electromotive force of the first winding 1032, and the size of the current in the first outgoing line 1023a is calculated, and the current Is of the first outgoing line 1023a can reflect the current of the rotor 102. Wherein, the external detection element 200 can be but not limited to a current sensor, a voltage sensor (such as a Hall voltage sensor), a magnetoresistance sensor and the like.

[0104] In summary, the electromagnetic device 100 provided by the embodiment of the present application can magnetically shield the second segment 10232 of the second outgoing line 1023b, so that in the ring of the first magnetic core 1031, only the magnetic field generated by the first segment 10231 of the first outgoing line 1023a in the energized case can pass through the first magnetic core 1031. Based on this, the first magnetic core 1031 can be magnetically coupled with the magnetic field of the first segment 10231 of the first outgoing line 1023a, and generate magnetic flux, and the magnetic field strength in the first magnetic core 1031 can change with the change of the current Is of the first outgoing line 1023a. Based on this, the first winding 1032 mounted on or wound around the first magnetic core 1031 can induct the change of the magnetic field of the first magnetic core 1031, and generate an induced electromotive force, so that the external detection element 200 electrically connected with the first winding 1032 can detect the voltage Uo, the current Isen or the induced electromotive force of the first winding 1032 to calculate the size of the current in the first outgoing line 1023a, and then obtain the current of the rotor 102. Thus, the electromagnetic device 100 can form a current detection assembly 103 with simplified structure through the first magnetic core 1031 in the ring and surrounding the periphery of each outgoing line 1023 of the rotor 102, and the first winding 1032 mounted on the first magnetic core 1031, so as to conveniently, quickly and accurately measure the current Is of the first outgoing line 1023a, and obtain the current of the rotor 102.

[0105] The current detection assembly 103 provided in this embodiment needs to use the lead-out wire 1023 of the rotor 102, but does not need to add additional components such as current detection components on the rotor 102 side, so that the structure of the rotor 102 can be lightened, the weight of the rotor 102 can be reduced, the centrifugal force of the rotor 102 can be reduced, and the reliability and stability of the electromagnetic device 100 can be improved.

[0106] The current detection assembly 103 provided in this embodiment mainly magnetically couples with the magnetic field of the first segment 10231 of the first lead-out wire 1023a via the first magnetic core 1031, and there is no friction between the current detection assembly 103 and the rotor 102, so that the wear risk of the first magnetic core 1031 and the first winding 1032 of the current detection assembly 103 can be reduced, the service life of the first magnetic core 1031 and the first winding 1032 of the current detection assembly 103 can be prolonged, and the reliability and maintainability of the current detection assembly 103 can be improved.

[0107] Please refer to FIGS. 3, 4, in some embodiments of the present application, the electromagnetic device 100 comprises a rotating support 104, and the rotor 102 is sleeved outside the rotating support 104.

[0108] It should be noted that the rotating support 104 can be a shaft structure or a cylindrical structure. The rotating support 104 can be a metal piece or a non-metal piece. The rotor 102 is sleeved on the outer periphery of the rotating support 104, and the rotating support 104 can provide stable support for the rotor 102 to improve the stability and reliability of the rotor 102 during rotation and reduce friction and wear.

[0109] By adopting the above scheme, the rotating support 104 can be provided, and the rotor 102 is sleeved on the outer periphery of the rotating support 104, so that the rotating support 104 can provide stable support for the rotor 102. Based on this, the rotor 102 can maintain the required position and posture during rotation, the stability and reliability of the rotor 102 during rotation can be improved, and the friction and wear of the rotor 102 during rotation can be reduced, thereby helping to improve the stability and reliability of the operation of the electromagnetic device 100.

[0110] Please refer to FIGS. 3, 4, 5, in some embodiments of the present application, the first segment 10231 of the first lead-out wire 1023a is arranged between the rotating support 104 and the first magnetic core 1031.

[0111] It should be noted that the first segment 10231 of the first lead-out wire 1023a is arranged between the rotating support 104 and the first magnetic core 1031, that is, the first segment 10231 of the first lead-out wire 1023a is arranged between the outer periphery of the rotating support 104 and the inner ring of the first magnetic core 1031.

[0112] By adopting the above scheme, the first segment 10231 of the first outgoing line 1023a can be arranged between the rotating support 104 and the first magnetic core 1031, so as to reduce the risk that the rotating support 104 blocks the first segment 10231 of the first outgoing line 1023a and the first magnetic core 1031. Based on this, the risk that the magnetic field of the first segment 10231 of the first outgoing line 1023a is weakened by the rotating support 104 can be reduced, so as to facilitate the direct and interference-free magnetic coupling between the first magnetic core 1031 and the magnetic field of the first segment 10231 of the first outgoing line 1023a, facilitate the accurate current Is sensing of the current detection assembly 103 by the first outgoing line 1023a, and be beneficial to improving the detection accuracy of the current detection assembly 103.

[0113] Of course, in other embodiments, the rotating support 104 can be arranged along the axial direction z of the first magnetic core 1031, and the rotating support 104 does not have a portion opposite to the first magnetic core 1031 in the radial direction of the first magnetic core 1031. In this case, the first segment 10231 of the first outgoing line 1023a can be arranged at any position in the ring of the first magnetic core 1031 as needed and flexibly, without being affected by the rotating support 104. The axial direction z of the first magnetic core 1031 is the extension direction of the central axis of the first magnetic core 1031.

[0114] Of course, in other embodiments, the rotating support 104 can be a cylindrical structure and be made of a non-magnetic or low magnetic permeability material (for example, non-magnetic stainless steel, engineering plastic, ceramic material, etc.). In this case, the first segment 10231 of the first outgoing line 1023a can be arranged in the cylinder of the rotating support 104, and the magnetic field of the first segment 10231 of the first outgoing line 1023a can penetrate to the outside of the rotating support 104 to be magnetically coupled with the first magnetic core 1031.

[0115] Please refer to FIG. 3, FIG. 4 and FIG. 5. In some embodiments of the present application, the rotating support 104 is a metal cylindrical structure, and the cylinder wall of the rotating support 104 is provided with a through hole 1041. At least one second outgoing line 1023b is arranged in the through hole 1041, and at least a part of the second segment 10232 of the second outgoing line 1023b is arranged in the cylinder of the rotating support 104.

[0116] It should be noted that the rotating support 104 is a metal piece, and the rotating support 104 is a cylindrical structure. The cylinder wall of the rotating support 104 is provided with a through hole 1041, and the through hole 1041 penetrates from the outside of the cylinder of the rotating support 104 to the inside of the cylinder of the rotating support 104. The through hole 1041 can be, but is not limited to, a circular hole, a rectangular hole, a waist-shaped hole, etc. At least one second outgoing line 1023b can pass into the cylinder of the rotating support 104 through the through hole 1041, and a part or all of the second segment 10232 of the second outgoing line 1023b is arranged in the cylinder of the rotating support 104.

[0117] The second segment 10232 of the second lead-out wire 1023b generates a magnetic field in the energized case. In this case, the rotating support 104 as a metal conductor can be affected by the magnetic field of the portion of the second segment 10232 arranged in the rotating support 104, and eddy current is induced to cancel the magnetic field of the portion of the second segment 10232 arranged in the rotating support 104. That is, in this case, the rotating support 104 can act as a magnetic shielding component, and can exert a magnetic shielding effect on the portion of the second segment 10232 of the second lead-out wire 1023b arranged in the rotating support 104.

[0118] By adopting the above scheme, in the case that the second segment 10232 of the second lead-out wire 1023b passing through the through hole 1041 is energized and generates a magnetic field, the rotating support 104 as a metal cylindrical structure and a metal conductor can be affected by the magnetic field, and eddy current is induced to cancel the magnetic field of the portion of the second segment 10232 arranged in the rotating support 104. Thus, the rotating support 104 can act as a magnetic shielding component to magnetically shield part or all of the second segment 10232 of the second lead-out wire 1023b, so as to reduce the risk that the magnetic field of the second segment 10232 of the second lead-out wire 1023b interferes with the magnetic coupling between the first magnetic core 1031 and the first segment 10231, facilitate the first magnetic core 1031 to magnetically couple with the magnetic field of the first segment 10231 of the first lead-out wire 1023a in a targeted and reliable manner, facilitate the current detection assembly 103 to accurately and reliably induce the current Is of the first lead-out wire 1023a, and improve the detection reliability and detection accuracy of the current detection assembly 103. Moreover, the rotating support 104 as a magnetic shielding component can also reduce the number of magnetic shielding components directly added to the second lead-out wire 1023b, so as to reduce the number of components of the electromagnetic device 100, simplify the structure of the electromagnetic device 100, and reduce the cost of the electromagnetic device 100.

[0119] Please refer to FIG. 3 and FIG. 4, in some embodiments of the present application, the through hole 1041 and the first magnetic core 1031 are arranged in the axial direction z of the first magnetic core 1031, and the second segment 10232 of the second lead-out wire 1023b passing through the through hole 1041 is arranged in the rotating support 104.

[0120] It should be noted that the through hole 1041 and the first magnetic core 1031 are arranged in the axial direction z of the first magnetic core 1031, that is, the through hole 1041 and the first magnetic core 1031 are arranged in the radial direction of the first magnetic core 1031 and are not arranged opposite to each other. Based on this, the second lead-out wire 1023b passing through the through hole 1041, that is, the second lead-out wire 1023b passing into the cylinder of the rotating support 104 through the through hole 1041, can have its second segment 10232 arranged in the cylinder of the rotating support 104.

[0121] By adopting the above scheme, by spacing the through hole 1041 and the first magnetic core 1031 along the axial direction z of the first magnetic core 1031, the second lead-out wire 1023b passing through the through hole 1041 can be arranged with the second section 10232 entirely arranged in the cylinder of the rotating support 104. Based on this, in the case that the second section 10232 of the second lead-out wire 1023b is electrified and generates a magnetic field, the rotating support 104 can directly act as a magnetic shielding component to magnetically shield the entire second section 10232 of the second lead-out wire 1023b and completely offset the magnetic field of the second section 10232 of the second lead-out wire 1023b. In this way, the magnetic shielding effect of the rotating support 104 on the second section 10232 of the second lead-out wire 1023b can be optimized, and the risk of the rotating support 104 needing to cooperate with other magnetic shielding components to magnetically shield the second section 10232 of the second lead-out wire 1023b can be reduced.

[0122] Of course, in other embodiments, the through hole 1041 and the first magnetic core 1031 can be partially oppositely arranged along the radial direction of the first magnetic core 1031. The second lead-out wire 1023b passing through the through hole 1041 can have the second section 10232 partially arranged in the cylinder of the rotating support 104 and partially arranged outside the cylinder of the rotating support 104. In this case, the part of the second section 10232 of the second lead-out wire 1023b arranged in the rotating support 104 can be magnetically shielded by the rotating support 104, and the part of the second section 10232 of the second lead-out wire 1023b arranged outside the rotating support 104 can be magnetically shielded with the part of the first section 10231 of the first lead-out wire 1023a, and of course, the first section 10231 of the first lead-out wire 1023a needs to remain partially for magnetic coupling with the first magnetic core 1031.

[0123] Please refer to FIG. 5, FIG. 6, and FIG. 7. In some embodiments of the present application, the second section 10232 of the at least one second lead-out wire 1023b is arranged between the rotating support 104 and the first magnetic core 1031, and a shielding sleeve 105 is arranged on the outer periphery of the second section 10232 arranged between the rotating support 104 and the first magnetic core 1031.

[0124] It should be noted that the second section 10232 of the at least one second lead-out wire 1023b is arranged between the rotating support 104 and the first magnetic core 1031, i.e., between the outer periphery of the rotating support 104 and the inner ring of the first magnetic core 1031. In this case, the rotating support 104 does not substantially affect the magnetic field of the second section 10232 of the second lead-out wire 1023b.

[0125] On this basis, the outer periphery of the second segment 10232 between the rotating support 104 and the first magnetic core 1031 can be sleeved with a shielding sleeve 105, so as to realize the magnetic shielding effect of the second segment 10232 of the second lead-out wire 1023b through the shielding sleeve 105 as a magnetic shielding component.

[0126] By adopting the above scheme, for the second lead-out wire 1023b arranged between the rotating support 104 and the first magnetic core 1031, the shielding sleeve 105 can be sleeved on the outer periphery of the second segment 10232 of the second lead-out wire 1023b, so as to realize the magnetic shielding of the second segment 10232 of the second lead-out wire 1023b through the shielding sleeve 105 as a magnetic shielding component, thereby reducing the risk of the magnetic field of the second segment 10232 of the second lead-out wire 1023b interfering with the magnetic coupling between the first magnetic core 1031 and the first segment 10231, facilitating the magnetic coupling between the first magnetic core 1031 and the magnetic field of the first segment 10231 of the first lead-out wire 1023a, facilitating the accurate and reliable induction of the current detection assembly 103 to the current Is of the first lead-out wire 1023a, and improving the detection reliability of the current detection assembly 103. Moreover, the shielding sleeve 105 is relatively light, and will not greatly increase the weight and centrifugal force of the rotor 102. Moreover, through the shielding sleeve 105 as a magnetic shielding component, the number of through holes 1041 provided in the rotating support 104 can be reduced, thereby facilitating the processing convenience of the rotating support 104 and reducing the manufacturing cost of the rotating support 104.

[0127] It should be noted that in the case that the rotor 102 has two lead-out wires 1023, i.e. in the case that the rotor 102 has one second lead-out wire 1023b, the embodiments of "the rotating support 104 is a metal cylindrical structure, the cylindrical wall of the rotating support 104 penetrates the through hole 1041, and at least one second lead-out wire 1023b is arranged in the through hole 1041, and at least a part of the second segment 10232 is arranged in the rotating support 104" and "the second segment 10232 of at least one second lead-out wire 1023b is arranged between the rotating support 104 and the first magnetic core 1031, and the outer periphery of the second segment 10232 arranged between the rotating support 104 and the first magnetic core 1031 is sleeved with a shielding sleeve 105" can be selectively applied to realize the magnetic shielding of the second segment 10232 of the second lead-out wire 1023b.

[0128] In the case that the rotor 102 has at least three lead-out lines 1023, i.e. in the case that the rotor 102 has at least two second lead-out lines 1023b, the "rotating support 104 is a metal cylindrical structure, a through hole 1041 is formed in the cylindrical wall of the rotating support 104, and the at least one second lead-out line 1023b is arranged in the through hole 1041, and at least a part of the second segment 10232 of the second lead-out line 1023b is arranged in the rotating support 104", "the second segment 10232 of the at least one second lead-out line 1023b is arranged between the rotating support 104 and the first magnetic core 1031, and a shielding sleeve 105 is arranged on the outer periphery of the second segment 10232 arranged between the rotating support 104 and the first magnetic core 1031" embodiments can be selectively applied or combined to realize magnetic shielding of the second segment 10232 of each second lead-out line 1023b.

[0129] Referring to FIGS. 6 and 7, in some embodiments of the present application, the at least one shielding sleeve 105 is a conductive metal member.

[0130] It should be noted that the shielding sleeve 105 can be a conductive metal member made of a conductive metal material, so that the shielding sleeve 105 has high electrical conductivity.

[0131] The second segment 10232 of the second lead-out line 1023b generates a magnetic field in the case of being energized. The shielding sleeve 105 is a conductive metal member, i.e. a metal conductor, which can be affected by the magnetic field of the second segment 10232 arranged therein and induce eddy current to cancel the magnetic field of the second segment 10232 arranged therein. Based on this, the shielding sleeve 105 as a conductive metal member can reliably cancel the magnetic field of the second segment 10232 arranged therein and thus can reliably shield the second segment 10232 arranged therein.

[0132] By adopting the above scheme, the shielding sleeve 105 can be a conductive metal member, so that the shielding sleeve 105 has high electrical conductivity and can form a metal conductor. Based on this, in the case that the second segment 10232 arranged in the shielding sleeve 105 is energized and generates a magnetic field, the shielding sleeve 105 can be affected by the magnetic field of the second segment 10232 arranged therein and induce eddy current to cancel the magnetic field of the second segment 10232 arranged therein. Thus, the shielding sleeve 105 can reliably shield the second segment 10232 arranged therein, i.e. the magnetic shielding effect of the shielding sleeve 105 can be optimized.

[0133] Referring to FIGS. 6 and 7, in some embodiments of the present application, the material of the conductive metal member includes at least one of gold, silver, copper, aluminum, iron, and an alloy.

[0134] It should be noted that the shielding sleeve 105 for the conductive metal piece can be made of, but is not limited to, at least one of gold, silver, copper, aluminum, iron, and alloy.

[0135] By using the above scheme, the conductivity of the conductive metal piece can be improved, so that the strength of the eddy current of the shielding sleeve 105 for the conductive metal piece can be enhanced, the magnetic field of the second segment 10232 passing through the shielding sleeve 105 can be effectively and reliably canceled by the shielding sleeve 105 for the conductive metal piece, and the magnetic shielding effect of the shielding sleeve 105 for the conductive metal piece can be optimized.

[0136] Referring to FIGS. 6 and 7, in some embodiments of the present application, the at least one shielding sleeve 105 is a magnetic conductive piece.

[0137] It should be noted that the shielding sleeve 105 can be a magnetic conductive piece made of a magnetic conductive material, so that the shielding sleeve 105 has a high magnetic permeability.

[0138] The second segment 10232 of the second lead-out wire 1023b generates a magnetic field in a power-on case. The shielding sleeve 105 is a magnetic conductive piece, i.e., a magnetic conductor, and can guide and concentrate the magnetic field of the second segment 10232 passing through the shielding sleeve 105 inside the shielding sleeve 105, and hinder the magnetic field of the second segment 10232 passing through the shielding sleeve 105 from spreading and leaking outside. Based on this, the shielding sleeve 105 for the magnetic conductive piece can reliably constrain the magnetic field of the second segment 10232 passing through the shielding sleeve 105, so as to reliably shield the second segment 10232 passing through the shielding sleeve 105.

[0139] By using the above scheme, the shielding sleeve 105 can be a magnetic conductive piece, so that the shielding sleeve 105 has a high magnetic permeability. Based on this, in a case where the second segment 10232 passing through the shielding sleeve 105 is powered on and generates a magnetic field, the shielding sleeve 105 can guide and concentrate the magnetic field of the second segment 10232 passing through the shielding sleeve 105 inside the shielding sleeve 105, and hinder the magnetic field of the second segment 10232 passing through the shielding sleeve 105 from spreading and leaking outside. Thus, the shielding sleeve 105 can reliably shield the second segment 10232 passing through the shielding sleeve 105, i.e., the magnetic shielding effect of the shielding sleeve 105 can be optimized.

[0140] Referring to FIGS. 6 and 7, in some embodiments of the present application, the material of the magnetic conductive piece includes at least one of silicon steel sheet, ferrite, microcrystalline, ultramicrocrystalline, and permalloy.

[0141] It should be noted that the shielding sleeve 105 for the magnetic conductive piece can be made of, but is not limited to, at least one of silicon steel sheet, ferrite, microcrystalline, ultramicrocrystalline, and permalloy.

[0142] By adopting the above scheme, the magnetic permeability of the magnetic conductive member can be improved, thereby the magnetic field concentration effect of the shielding sleeve 105 as the magnetic conductive member can be enhanced, the magnetic field of the second section 10232 penetrating through the shielding sleeve 105 can be reliably concentrated in the shielding sleeve 105, and the magnetic shielding effect of the shielding sleeve 105 as the magnetic conductive member can be optimized.

[0143] Please refer to FIG. 3 and FIG. 4, in some embodiments of the present application, the first winding 1032 is a coil winding, and the first winding 1032 is wound around the first magnetic core 1031.

[0144] It should be noted that the first winding 1032 is a coil winding, and the coil winding is a winding formed by winding a wire. The first winding 1032 is wound around the first magnetic core 1031.

[0145] By adopting the above scheme, by making the first winding 1032 a coil winding wound around the first magnetic core 1031, on the one hand, the shape, size, number of turns, etc. of the first winding 1032 can be flexibly designed and adjusted according to actual application requirements, thereby improving the flexibility of design and assembly of the first winding 1032, and enabling the first winding 1032 to meet specific electromagnetic performance requirements. On the other hand, the first winding 1032 can have high output power and working efficiency, and can effectively transmit electric energy, thereby reducing energy loss during transmission of electric energy by the first winding 1032.

[0146] Please refer to FIG. 8 and FIG. 9, in some embodiments of the present application, the first winding 1032 includes two ring-shaped PCB windings 10321, and the two PCB windings 10321 are arranged on opposite sides of the first magnetic core 1031 along the axial direction z of the first magnetic core 1031, and are electrically connected to each other at the inner ring side and the outer ring side.

[0147] It should be noted that the PCB winding 10321 refers to a compact and integrated winding structure printed with a wire on a printed circuit board (PCB). In the first winding 1032, two PCB windings 10321 are provided, and the two PCB windings 10321 are arranged in a ring shape and are arranged on opposite sides of the first magnetic core 1031 along the axial direction z of the first magnetic core 1031. The two PCB windings 10321 are electrically connected to each other at the inner ring side, and the two PCB windings 10321 are also electrically connected to each other at the outer ring side, so that the two PCB windings 10321 are co-rotatingly wound around the first magnetic core 1031. The two PCB windings 10321 can be electrically connected by means of, but not limited to, wire welding, terminal insertion, etc.

[0148] By adopting the above scheme, the two annular PCB windings 10321 can be arranged on opposite sides of the first magnetic core 1031 along the axial direction z of the first magnetic core 1031, and the two PCB windings 10321 are electrically connected to each other at the inner ring side, and the two PCB windings 10321 are electrically connected to each other at the outer ring side, so that the two PCB windings 10321 can be collectively wound around the first magnetic core 1031 to form the first winding 1032. Based on this, on the one hand, the structure similar to the double winding can be formed by the two PCB windings 10321, so as to enhance the electromagnetic conversion efficiency of the first winding 1032. On the one hand, the occupied space of the PCB winding 10321 in the axial direction z of the first magnetic core 1031 can be compressed, so as to compact the occupied space of the first winding 1032 in the axial direction z of the first magnetic core 1031, thereby helping to reduce the height of the current detection assembly 103 in the axial direction z of the first magnetic core 1031, and facilitating the integration and thinning of the current detection assembly 103. On the one hand, the wiring of the first winding 1032 can be simplified, the number and complexity of the connection lines of the first winding 1032 can be reduced, the production cost of the PCB winding 10321 and the first winding 1032 can be reduced, and the production convenience and assembly convenience of the PCB winding 10321 and the first winding 1032 can be improved.

[0149] In addition, the first winding 1032 provided by the embodiment is especially suitable for being used in combination with the flat and thinned first magnetic core 1031, so as to compress the height of the current detection assembly 103 in the axial direction z of the first magnetic core 1031, thereby facilitating the integration and thinning of the current detection assembly 103.

[0150] Of course, in other embodiments, the first winding 1032 can adopt other structural forms, for example, the first winding 1032 can be a planar conductor winding, etc.

[0151] Please refer to FIG. 8 and FIG. 9, in some embodiments of the present application, one of the PCB windings 10321 is provided with a first conductive terminal 10322, and the other PCB winding 10321 is provided with a second conductive terminal 10323, which corresponds to the first conductive terminal 10322 and is inserted and matched.

[0152] It should be noted that, on at least one of the inner ring side and the outer ring side of the two PCB windings 10321, one of the PCB windings 10321 can be provided with a first conductive terminal 10322, and the other PCB winding 10321 can be correspondingly provided with a second conductive terminal 10323 which is aligned with the first conductive terminal 10322 and is matched. The second conductive terminal 10323 which is aligned with the first conductive terminal 10322 can be inserted and matched with each other to realize electrical connection. As shown in FIGS. 8 and 9, in some embodiments, the first conductive terminal 10322 is a pin, and the second conductive terminal 10323 is a plug with a socket, and the pin can be inserted into the socket. Of course, in other embodiments, the first conductive terminal 10322 can be a plug, and the second conductive terminal 10323 can be a socket, and the plug can be inserted into the socket.

[0153] By adopting the above scheme, on at least one of the inner ring side and the outer ring side of the two PCB windings 10321, the two PCB windings 10321 can be one-to-one corresponding and inserted and matched with the first conductive terminal 10322 through the second conductive terminal 10323, so as to conveniently, quickly and reliably realize the electrical connection between the two PCB windings 10321. Based on this, the assembly convenience and efficiency between the two PCB windings 10321 can be improved, the stability of the relative position between the two PCB windings 10321 can be improved, and the convenience, reliability and stability of the electrical connection between the two PCB windings 10321 can be improved.

[0154] Of course, in other embodiments, the two PCB windings 10321 can be electrically connected by wire welding or other ways.

[0155] Please refer to FIGS. 3 and 4, in some embodiments of the present application, the first magnetic core 1031 is a single-layer structure.

[0156] It should be noted that the first magnetic core 1031 is a single-layer annular block structure. Single layer means that the number of layers of the first magnetic core 1031 along the axial direction z of the first magnetic core 1031 is one layer.

[0157] By means of the above scheme, by making the first magnetic core 1031 a single-layer structure, on one hand, the manufacturing process of the first magnetic core 1031 can be simplified, the production convenience and production efficiency of the first magnetic core 1031 can be improved, the defects and errors possibly introduced in the production process of the first magnetic core 1031 can be reduced, and the production cost of the first magnetic core 1031 can be reduced. On one hand, the integrity and mechanical strength of the first magnetic core 1031 can be improved, the risk of damage or deformation of the first magnetic core 1031 under external force or vibration can be reduced, and the service life of the first magnetic core 1031 and the current detection assembly 103 can be prolonged. On one hand, the magnetic flux path of the first magnetic core 1031 can be made direct and short, the loss of magnetic flux in the first magnetic core 1031 can be reduced, and the utilization efficiency of the first magnetic core 1031 for magnetic flux can be improved.

[0158] Referring to FIG. 10, in some embodiments of the present application, the first magnetic core 1031 is a multi-layer structure.

[0159] It should be noted that the first magnetic core 1031 is a multi-layer structure, i.e., the number of layers of the first magnetic core 1031 along the axial direction z of the first magnetic core 1031 is multi-layer.

[0160] By means of the above scheme, by making the first magnetic core 1031 a multi-layer structure, the structure and performance (such as magnetic performance, mechanical strength, heat dissipation performance, etc.) of the first magnetic core 1031 can be optimized by adjusting the materials, thicknesses, etc. of different layers, so that the design flexibility of the structure of the first magnetic core 1031 can be improved, and the first magnetic core 1031 can be adapted to different application requirements.

[0161] Referring to FIG. 10, in some embodiments of the present application, the first magnetic core 1031 includes a plurality of soft magnetic films 10311 stacked.

[0162] It should be noted that the soft magnetic film 10311 is a kind of magnetic thin film material with lower coercivity and higher magnetic permeability. The soft magnetic film 10311 is easy to magnetize and demagnetize. Therefore, the magnetic loss of the soft magnetic film 10311 when working in an alternating magnetic field is small. The plurality of soft magnetic films 10311 can be sequentially stacked along the axial direction z of the first magnetic core 1031 to collectively form the first magnetic core 1031.

[0163] By adopting the above scheme, by sequentially stacking the plurality of soft magnetic films 10311 along the axial direction z of the first magnetic core 1031, and collectively forming the first magnetic core 1031, on the one hand, the low coercivity and high permeability characteristics of the soft magnetic film 10311 can be used to enable the first magnetic core 1031 to perform well under high-frequency operating conditions, thereby enabling the first magnetic core 1031 to achieve efficient magnetic flux conversion and reduce energy loss. On the one hand, the thickness, material, and number of layers of the soft magnetic film 10311 can be adjusted to flexibly control the overall magnetic properties of the first magnetic core 1031 (including permeability, saturation magnetic induction, etc.), thereby improving the design flexibility of the structure of the first magnetic core 1031 and enabling the first magnetic core 1031 to adapt to different application requirements. On the one hand, since the soft magnetic film 10311 has good processing performance and is easy to cut and shape, the production convenience, assembly convenience, and assembly efficiency of the first magnetic core 1031 can be improved, and the production cost of the first magnetic core 1031 can be reduced.

[0164] Please refer to FIG. 3, FIG. 4, and FIG. 5, and in combination with some embodiments described above, a specific example of an electromagnetic device 100 is provided herein. The electromagnetic device 100 includes a stator 101, a rotor 102, a current detection assembly 103, and a rotating support 104.

[0165] The current detection assembly 103 includes a first magnetic core 1031 and a first winding 1032. The first magnetic core 1031 is a single-layer ring structure. The first winding 1032 is a coil winding, and the first winding 1032 is wound around the first magnetic core 1031 and electrically connected to an external detection element 200.

[0166] The rotating support 104 is a metal cylindrical structure. The rotor 102 is sleeved outside the rotating support 104. The rotor 102 has two lead wires 1023, both of which are arranged inside the ring of the first magnetic core 1031. One of the two lead wires 1023 is a first lead wire 1023a, and the other is a second lead wire 1023b.

[0167] The second lead-out wire 1023b has a second segment 10232 oppositely arranged with the first magnetic core 1031 along the radial direction of the first magnetic core 1031. The cylinder wall of the rotating support 104 has a through hole 1041 arranged along the axial direction z of the first magnetic core 1031. The second lead-out wire 1023b is arranged through the through hole 1041, and the second segment 10232 of the second lead-out wire 1023b is arranged in the rotating support 104. Based on this, when the second segment 10232 of the second lead-out wire 1023b is electrified and generates a magnetic field, the rotating support 104 can be used as a magnetic shielding component to magnetically shield the entire second segment 10232 of the second lead-out wire 1023b and completely offset the magnetic field of the second segment 10232 of the second lead-out wire 1023b. That is, the second segment 10232 of the second lead-out wire 1023b is magnetically shielded by the rotating support 104.

[0168] The first lead-out wire 1023a has a first segment 10231 oppositely arranged with the first magnetic core 1031 along the radial direction of the first magnetic core 1031. The first segment 10231 of the first lead-out wire 1023a is arranged between the rotating support 104 and the first magnetic core 1031. Based on this, in the ring of the first magnetic core 1031, only the magnetic field generated by the first segment 10231 of the first lead-out wire 1023a in the electrified case can pass through the first magnetic core 1031, so that the first magnetic core 1031 can be magnetically coupled with the magnetic field of the first segment 10231 of the first lead-out wire 1023a, so that the first magnetic core 1031 can generate magnetic flux, and the magnetic field strength in the first magnetic core 1031 can change with the change of the current Is of the first lead-out wire 1023a.

[0169] Based on this, the first winding 1032 arranged around the first magnetic core 1031 can induce the change of the magnetic field of the first magnetic core 1031 to generate an induced electromotive force, and the size of the induced electromotive force is proportional to the size of the current in the first lead-out wire 1023a.

[0170] Based on this, the external detection element 200 electrically connected with the first winding 1032 can detect the voltage Uo, the current Isen or the induced electromotive force of the first winding 1032, so as to obtain the size of the current in the first lead-out wire 1023a, and thus obtain the current of the rotor 102.

[0171] Therefore, the electromagnetic device 100 can form a current detection assembly 103 with simplified structure through the first magnetic core 1031 arranged in a ring and surrounding the outer periphery of each lead-out wire 1023 of the rotor 102, and the first winding 1032 installed on the first magnetic core 1031, so as to conveniently, quickly and accurately measure the current Is of the first lead-out wire 1023a, and thus obtain the current of the rotor 102.

[0172] And the current detection assembly 103 of the electromagnetic device 100 needs to borrow the outgoing line 1023 of the rotor 102, but does not add additional components such as current detection components on the rotor 102 side, so as to facilitate the lightweight structure of the rotor 102, reduce the weight of the rotor 102, reduce the centrifugal force of the rotor 102, and improve the reliability and stability of the operation of the electromagnetic device 100.

[0173] And the current detection assembly 103 of the electromagnetic device 100 mainly magnetically couples with the magnetic field of the first segment 10231 of the first outgoing line 1023a through the first magnetic core 1031, and there is no friction between the current detection assembly 103 and the rotor 102, so as to reduce the wear risk of the first magnetic core 1031 and the first winding 1032 of the current detection assembly 103, prolong the service life of the first magnetic core 1031 and the first winding 1032 of the current detection assembly 103, and improve the reliability and maintainability of the current detection assembly 103.

[0174] In one finite element simulation verification embodiment of the present example, the number of turns of the first winding 1032 is 12 turns, the first segment 10231 of the first outgoing line 1023a is arranged between the rotating support 104 and the first magnetic core 1031, the working frequency of the first outgoing line 1023a is 100 kHz, and the second segment 10232 of the second outgoing line 1023b is magnetically shielded by the rotating support 104. In this case, the simulation results show that the mutual inductance between the current detection assembly 103 and the first segment 10231 of the first outgoing line 1023a is 3.15uH, and the coupling coefficient is 0.97, which is verified to be feasible.

[0175] Please refer to FIG. 5, FIG. 6, FIG. 7, and some embodiments described above, another specific example of the electromagnetic device 100 is provided in the embodiments of the present application. The electromagnetic device 100 comprises a stator 101, a rotor 102, a current detection assembly 103 and a rotating support 104.

[0176] The current detection assembly 103 comprises a first magnetic core 1031 and a first winding 1032. The first magnetic core 1031 is a single-layer ring structure. The first winding 1032 is a coil winding, and the first winding 1032 is wound around the first magnetic core 1031 and electrically connected with the external detection element 200.

[0177] The rotor 102 is sleeved outside the rotating support 104. The rotor 102 has two outgoing lines 1023, both of which are arranged in the ring of the first magnetic core 1031. One of the outgoing lines 1023 is the first outgoing line 1023a, and the other outgoing line 1023 is the second outgoing line 1023b.

[0178] The second lead-out wire 1023b has a second section 10232 arranged opposite to the first magnetic core 1031 along the radial direction of the first magnetic core 1031. The second section 10232 of the second lead-out wire 1023b is arranged between the rotating support 104 and the first magnetic core 1031. The outer periphery of the second section 10232 of the second lead-out wire 1023b is sleeved with a shielding sleeve 105. The shielding sleeve 105 is a magnetic conductive member. Based on this, in the case that the second section 10232 of the second lead-out wire 1023b is energized and generates a magnetic field, the shielding sleeve 105 can act as a magnetic shielding component. The shielding sleeve 105 can guide and concentrate the magnetic field of the second section 10232 passing therethrough to the inside of the shielding sleeve 105, and hinder the magnetic field of the second section 10232 passing therethrough from spreading and leaking to the outside. That is, the second section 10232 of the second lead-out wire 1023b is magnetically shielded by the shielding sleeve 105.

[0179] The first lead-out wire 1023a has a first section 10231 arranged opposite to the first magnetic core 1031 along the radial direction of the first magnetic core 1031. The first section 10231 of the first lead-out wire 1023a is arranged between the rotating support 104 and the first magnetic core 1031. Based on this, in the ring of the first magnetic core 1031, only the magnetic field generated by the first section 10231 of the first lead-out wire 1023a in the energized case can pass through the first magnetic core 1031, so that the first magnetic core 1031 can be magnetically coupled with the magnetic field of the first section 10231 of the first lead-out wire 1023a, so that the first magnetic core 1031 can generate magnetic flux, and the magnetic field strength in the first magnetic core 1031 can change with the change of the current Is of the first lead-out wire 1023a.

[0180] Based on this, the first winding 1032 wound around the first magnetic core 1031 can sense the change of the magnetic field of the first magnetic core 1031, and generate an induced electromotive force, the size of which is proportional to the size of the current in the first lead-out wire 1023a.

[0181] Based on this, the external detection element 200 electrically connected with the first winding 1032 can detect the voltage Uo, the current Isen or the induced electromotive force of the first winding 1032, so as to obtain the size of the current in the first lead-out wire 1023a, and thus obtain the current of the rotor 102.

[0182] Therefore, the electromagnetic device 100 can form a current detection assembly 103 with simplified structure through the first magnetic core 1031 arranged in a ring shape and surrounding the outer periphery of each lead-out wire 1023 of the rotor 102, and the first winding 1032 installed on the first magnetic core 1031, so as to conveniently, quickly and accurately measure the current Is of the first lead-out wire 1023a, and thus obtain the current of the rotor 102.

[0183] And the current detection assembly 103 of the electromagnetic device 100 needs to borrow the lead-out wire 1023 of the rotor 102, but does not add additional components such as current detection components on the rotor 102 side, so that the structure of the rotor 102 can be lightened, the weight of the rotor 102 can be reduced, the centrifugal force of the rotor 102 can be reduced, and the reliability and stability of the operation of the electromagnetic device 100 can be improved.

[0184] And the current detection assembly 103 of the electromagnetic device 100 mainly magnetically couples with the magnetic field of the first segment 10231 of the first lead-out wire 1023a through the first magnetic core 1031, and there is no friction between the current detection assembly 103 and the rotor 102, so that the wear risk of the first magnetic core 1031 and the first winding 1032 of the current detection assembly 103 can be reduced, the service life of the first magnetic core 1031 and the first winding 1032 of the current detection assembly 103 can be prolonged, and the reliability and maintainability of the current detection assembly 103 can be improved.

[0185] In one finite element simulation verification embodiment of the present example, the number of turns of the first winding 1032 is 12 turns, the first segment 10231 of the first lead-out wire 1023a and the second segment 10232 of the second lead-out wire 1023b are both arranged between the rotating support 104 and the first magnetic core 1031, the outer periphery of the second segment 10232 of the second lead-out wire 1023b is sleeved with a shielding sleeve 105, the shielding sleeve 105 is a magnetic shielding member and is made of ferrite material, and the second segment 10232 of the second lead-out wire 1023b is magnetically shielded by the shielding sleeve 105. The working frequency of the first lead-out wire 1023a is 100 kHz. In this case, the simulation results show that the mutual inductance between the current detection assembly 103 and the first segment 10231 of the first lead-out wire 1023a is 1.42uH, and the coupling coefficient is 0.94, which verifies the feasibility.

[0186] Please refer to FIG. 1, FIG. 3, some embodiments of the present application provide an electric drive device 10, which comprises the electromagnetic device 100 provided by the embodiments of the present application.

[0187] By adopting the above scheme, the electric drive device 10 can improve the operation reliability, operation stability and maintainability of the electric drive device 10 by applying the electromagnetic device 100 provided by the embodiments of the present application.

[0188] Please refer to FIG. 1, FIG. 3, FIG. 4, in some embodiments of the present application, the electromagnetic device 100 is a rotary transformer, and the electric drive device 10 further comprises a motor, the motor comprising a motor rotor and a motor stator, and the rotor 102 of the electromagnetic device 100 is connected with the motor rotor.

[0189] It should be noted that the electromagnetic device 100 can be a rotary transformer for detecting the speed, position and other information of the rotor of the motor. In this case, the stator 101 of the electromagnetic device 100 is connected to the motor controller, and the stator 101 of the electromagnetic device 100 generates a stator magnetic field around it when the motor controller provides an excitation voltage to it; the rotor 102 of the electromagnetic device 100 is connected to the rotor of the motor for following the rotation of the rotor of the motor; the rotor 102 of the electromagnetic device 100 can generate an induced current based on the principle of electromagnetic induction during rotation, and the induced current changes with the position, speed and other changes of the rotor of the motor, that is, carries the state information of the rotor of the motor; the current detection component 103 of the electromagnetic device 100 can detect the induced current to obtain the speed, position and other state information of the rotor of the motor.

[0190] By adopting the above scheme, in the case that the electric drive device 10 includes a motor, the electromagnetic device 100 provided by the embodiments of the present application can be used as a rotary transformer, and the rotor 102 of the electromagnetic device 100 is connected to the rotor of the motor, so that the induced current of the rotor 102 of the electromagnetic device 100 can carry the position, speed and other state information of the rotor of the motor. Based on this, the induced current of the rotor 102 of the electromagnetic device 100 can be conveniently, quickly and accurately measured through the current detection component 103 of the electromagnetic device 100, so that the speed, position and other state information of the rotor of the motor can be conveniently, quickly and accurately obtained.

[0191] Please refer to FIG. 1, some embodiments of the present application provide an electric drive system 1, the electric drive system 1 includes a battery 20 and the electric drive device 10 provided by the embodiments of the present application, the battery 20 is electrically connected with the electric drive device 10.

[0192] By adopting the above scheme, the electric drive system 1 can improve the operation reliability, operation stability and working performance of the electric drive system 1 by applying the electric drive device 10 provided by the embodiments of the present application.

[0193] Please refer to FIG. 1, some embodiments of the present application provide an electric drive system 1, the electric drive system 1 includes a battery 20 and the electric drive device 10 provided by the embodiments of the present application, the battery 20 is electrically connected with the electric drive device 10.

[0194] By adopting the above scheme, the electric drive system 1 can improve the operation reliability, operation stability and working performance of the electric drive system 1 by applying the electric drive device 10 provided by the embodiments of the present application.

[0195] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An electromagnetic device, wherein: The electromagnetic device comprises: stator; a rotor having at least two lead wires; The current detection component includes a first magnetic core and a first winding, wherein the first magnetic core is arranged in a ring shape, and the first winding is installed on the first magnetic core and is electrically connected to an external detection element; The lead wires are passed through the ring of the first magnetic core; one of the lead wires is the first lead wire, and the other lead wires are the second lead wires; the first lead wire has a first section arranged opposite to the first magnetic core along the radial direction of the first magnetic core, and the second lead wire has a second section arranged opposite to the first magnetic core along the radial direction of the first magnetic core; the second section of the second lead wire is magnetically shielded, and the current detection component is used to magnetically couple with the first section of the first lead wire and sense the current of the first lead wire.

2. The electromagnetic device according to claim 1, wherein The electromagnetic device includes a rotating support member, the rotor is sleeved outside the rotating support member, and the first section of the first lead wire is arranged between the rotating support member and the first magnetic core.

3. The electromagnetic device according to claim 2, wherein: The rotating support is a metal cylindrical structure, a through hole is passed through the cylindrical wall of the rotating support, at least one second lead wire is passed through the through hole, and at least a part of the second section thereof is arranged in the rotating support.

4. The electromagnetic device according to claim 3, wherein The through hole and the first magnetic core are spaced apart in the axial direction of the first magnetic core, and the second section of the second lead wire passing through the through hole is entirely disposed in the rotating support component.

5. The electromagnetic device according to claim 2, wherein: The second section of at least one second lead wire is arranged between the rotation support and the first magnetic core, and a shielding sleeve is provided on the outer periphery of the second section between the rotation support and the first magnetic core.

6. The electromagnetic device according to claim 5, wherein At least one of the shielding sleeves is a conductive metal piece.

7. The electromagnetic device according to claim 6, wherein The material of the conductive metal part includes at least one of gold, silver, copper, aluminum, iron, and alloys.

8. The electromagnetic device according to claim 5, wherein At least one of the shielding sleeves is a magnetic conductive component.

9. The electromagnetic device according to claim 8, wherein The material of the magnetic conductive component includes at least one of silicon steel sheet, ferrite, microcrystal, ultramicrocrystal, and Permalloy.

10. The electromagnetic device according to any one of claims 1 to 9, wherein: The first winding is a coil winding, and the first winding is wound around the first magnetic core.

11. The electromagnetic device according to any one of claims 1 to 9, wherein: The first winding includes two annular PCB windings, which are arranged on opposite sides of the first magnetic core along the axial direction of the first magnetic core. The two PCB windings are electrically connected to each other on their inner ring sides and on their outer ring sides.

12. The electromagnetic device according to claim 11, wherein One of the PCB windings is provided with a first conductive terminal, and the other PCB winding is provided with a second conductive terminal, and the second conductive terminal corresponds to the first conductive terminal one by one and is plugged into and matched with the first conductive terminal.

13. The electromagnetic device according to any one of claims 1 to 12, wherein: The first magnetic core is a single-layer structure.

14. The electromagnetic device according to any one of claims 1 to 12, wherein: The first magnetic core has a multi-layer structure.

15. The electromagnetic device of claim 14, wherein: The first magnetic core includes a plurality of soft magnetic films stacked together.

16. An electric drive device, wherein: The electric drive device comprises an electromagnetic device according to any one of claims 1-15.

17. The electric drive device according to claim 16, wherein: The electromagnetic device is a rotary transformer. The electric drive device further includes a motor. The motor includes a motor rotor and a motor stator. The rotor of the electromagnetic device is connected to the motor rotor.

18. An electric drive system, wherein: The electric drive system includes a battery and the electric drive device according to claim 16 or 17, and the battery is electrically connected to the electric drive device.

19. An electric device, wherein: The electric device includes the electric drive system according to claim 18.

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