Transformer and motor

Abstract

The utility model relates to a transformer and a motor. The transformer comprises a primary side mechanism and a secondary side mechanism, the primary side mechanism comprises a primary side base, a primary side magnetic core and a primary side coil, the primary side base is provided with a first containing groove, the primary side magnetic core is arranged in the first containing groove, and the primary side coil is embedded into the primary side magnetic core; a plurality of first insulating cushion blocks are arranged between the side wall of the primary side magnetic core and the groove wall of the first accommodating groove, so that a first gap is formed between the side wall of the primary side magnetic core and the groove wall of the first accommodating groove; the secondary side mechanism comprises a secondary side base, a secondary side magnetic core and a secondary side coil, the secondary side base is provided with a second containing groove, the secondary side magnetic core is arranged in the second containing groove, the secondary side coil is embedded into the secondary side magnetic core, and a plurality of second insulation cushion blocks are arranged between the side wall of the secondary side magnetic core and the groove wall of the second containing groove. And a second gap is formed between the side wall of the secondary side magnetic core and the groove wall of the second accommodating groove. The transformer and the motor provided by the utility model have good performance.

Description

Technical Field

[0001] The present application relates to the technical field of transformers, and in particular to a transformer and a motor. Background Art

[0002] Wireless excitation transformer is a device that can realize energy transmission between rotating parts and stationary parts without physical contact. This transformer is generally divided into a rotating side and a fixed side. The fixed side is fixed on the base, and the rotating side is connected to the rotating component and rotates together to provide energy or signals to the rotating component.

[0003] The rotating side and the fixed side of the existing wireless excitation transformer realize energy conversion through mutual coupling in the circumferential direction, that is, the rotating side is coaxially arranged around the fixed side, and the rotating side can rotate circumferentially relative to the fixed side. Since this transformer has a structure in which the rotating side is nested in the fixed side, the coils of the rotating side and the fixed side must be increased accordingly when a larger conversion power is required, which is not conducive to the miniaturization development trend of the product.

[0004] Therefore, achieving the same conversion power without increasing the size of the transformer is a topic that needs to be improved in the development of this field. Summary of the invention

[0005] Based on this, it is necessary to provide a transformer and motor that are compact and stable and conform to the development trend of miniaturization based on the existing technology.

[0006] In a first aspect, a transformer is provided, comprising a primary mechanism and a secondary mechanism, wherein the primary mechanism and the secondary mechanism are arranged relative to each other along a rotation axis of the transformer, and the secondary mechanism can rotate circumferentially relative to the primary mechanism;

[0007] The primary mechanism includes a primary base, a primary magnetic core and a primary coil, the primary base is provided with a first receiving groove, the primary magnetic core is arranged in the first receiving groove, the primary coil is embedded in the primary magnetic core, and a plurality of first insulating pads are provided between the side wall of the primary magnetic core and the groove wall of the first receiving groove, and a first gap is formed between the side wall of the primary magnetic core and the groove wall of the first receiving groove by means of the plurality of first insulating pads; the secondary mechanism includes a secondary base, a secondary magnetic core and a secondary coil, the secondary base is provided with a second receiving groove, the secondary magnetic core is arranged in the second receiving groove, the secondary coil is embedded in the secondary magnetic core, a plurality of second insulating pads are provided between the side wall of the secondary magnetic core and the groove wall of the second receiving groove, and a second gap is formed between the side wall of the secondary magnetic core and the groove wall of the second receiving groove by means of the plurality of second insulating pads.

[0008] In one embodiment, the first containing groove and the primary magnetic core are both annular, and the outer side wall and the inner side wall of the first containing groove are both provided with a plurality of first grooves spaced apart along the circumferential direction, and the first insulating spacer is provided in each of the first grooves;

[0009] The second containing groove and the secondary magnetic core are both annular, and a plurality of second grooves are arranged at intervals along the circumferential direction on the outer side wall and the inner side wall of the second containing groove, and the second insulating spacer is arranged in each of the second grooves.

[0010] In one embodiment, the primary base is provided with a first through hole, the primary magnetic core is provided with a second through hole, and the primary coil is connected to an external circuit through the first through hole and the second through hole;

[0011] The secondary side mechanism also includes a circuit board, the circuit board cover is arranged on the end surface of the secondary side base, the secondary side base is provided with a third through hole, the secondary side magnetic core is provided with a fourth through hole, and the secondary side coil is electrically connected to the circuit board through the third through hole and the fourth through hole.

[0012] In one embodiment, the primary mechanism also includes a primary frame, the primary coil is wound inside the primary frame, and the primary frame is arranged inside the primary magnetic core; the secondary mechanism also includes a secondary frame, the secondary coil is wound inside the secondary frame, and the secondary frame is arranged inside the secondary magnetic core.

[0013] In one embodiment, the end surface of the primary side frame is evenly provided with a plurality of first notches or a plurality of first openings along the edge; the end surface of the secondary side frame is evenly provided with a plurality of second notches or a plurality of second openings along the edge.

[0014] In one embodiment, the primary side skeleton is provided with a first slot and a fifth through hole at a position corresponding to the first through hole, the starting lead of the primary coil is bent and led out from the fifth through hole, and the end lead of the primary coil is led out from the first slot; the secondary side skeleton is provided with a second slot and a sixth through hole at a position corresponding to the second through hole, the starting lead of the secondary coil is bent and led out from the sixth through hole, and the end lead of the secondary coil is led out from the second slot.

[0015] In one embodiment, the primary side mechanism also includes a primary side U-shaped pad, which is evenly buckled on the circumference of the primary coil, so that a third gap is formed between the primary coil and the primary magnetic core; the secondary side mechanism also includes a secondary side U-shaped pad, which is evenly buckled on the circumference of the secondary coil, so that a fourth gap is formed between the secondary coil and the secondary magnetic core.

[0016] In one embodiment, the difference between the width of the outer annular wall of the primary base and the width of the outer annular wall of the secondary base is greater than or equal to 2 times the coaxiality tolerance of the magnetic core; and

[0017] The difference between the width of the inner ring wall of the primary base and the width of the inner ring wall of the secondary base is greater than or equal to twice the coaxiality tolerance of the magnetic core.

[0018] In one of the embodiments, the gap between the first containing groove and the primary magnetic core, and the gap between the primary magnetic core and the primary coil are filled with a first potting compound; the gap between the second containing groove and the secondary magnetic core, and the gap between the secondary magnetic core and the secondary coil are filled with a second potting compound.

[0019] In a second aspect, a motor is also provided, comprising:

[0020] A motor rotor and a rotating shaft, wherein the motor rotor is sleeved on the rotating shaft;

[0021] In the transformer described in any of the above embodiments, the rotation axis of the transformer is the same as the axis of the rotating shaft, the primary mechanism is installed independently of the rotating shaft, and the secondary mechanism is connected to the rotating shaft and can rotate with the rotating shaft.

[0022] The above-mentioned transformer can transmit the energy or signal generated by the primary mechanism to the secondary mechanism by arranging the primary mechanism and the secondary mechanism relatively along the rotation axis. The primary base is provided with a first receiving groove, and the primary magnetic core is placed in the first receiving groove. The secondary base is provided with a second receiving groove, and the secondary magnetic core is placed in the second receiving groove. By arranging the primary mechanism 100 and the secondary mechanism 200 as a relative surface coupling design, the two do not need to be nested, so the volume is reduced compared with the prior art, and the volume can be made smaller while achieving efficient power conversion. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1 is a schematic diagram of the structure of a motor according to an embodiment of the present application.

[0024] FIG. 2 is a structural exploded view of the primary side mechanism of the transformer described in an embodiment of the present application.

[0025] FIG3 is a structural exploded view of the secondary side mechanism of the transformer according to an embodiment of the present application.

[0026] FIG. 4 is a schematic structural diagram of the primary base of the transformer according to an embodiment of the present application.

[0027] FIG5 is a schematic diagram of the installation of the primary magnetic core of the transformer according to an embodiment of the present application.

[0028] FIG6 is a schematic diagram of the installation of the primary coil of the transformer according to an embodiment of the present application.

[0029] FIG. 7 is a schematic structural diagram of a secondary base of a transformer according to an embodiment of the present application.

[0030] FIG8 is a schematic diagram of the installation of the secondary magnetic core of the transformer according to an embodiment of the present application.

[0031] FIG. 9 is a schematic diagram of the installation of the secondary coil of the transformer according to an embodiment of the present application.

[0032] FIG. 10 is a cross-sectional view of the transformer according to an embodiment of the present application.

[0033] FIG. 11 is a coil structure diagram of a transformer according to another embodiment of the present application.

[0034] FIG. 12 is a skeleton structure diagram of a transformer according to another embodiment of the present application.

[0035] Reference numerals: 10, transformer; 20, motor rotor; 30, shaft;

[0036] 100, primary side mechanism; 110, primary side base; 110A, first accommodating groove; 111, first insulating pad; 110B, first groove; 110C, first through hole; 112, first rubber plug; 120, primary side magnetic core; 120A, second through hole; 130, primary side coil; 131, primary side U-shaped pad; 140, primary side frame; 140A, first notch; 140B, first slot; 140C, fifth through hole; 150, primary side sealing glue;

[0037] 200, secondary side mechanism; 210, secondary side base; 210A, second accommodating groove; 211, second insulating pad; 210B, second groove; 210C, third through hole; 212, second rubber plug; 220, secondary side magnetic core; 220A, fourth through hole; 230, secondary side coil; 231, secondary side U-shaped pad; 240, circuit board; 250, secondary side frame; 250A, second notch; 260, secondary side sealing glue. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0039] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0040] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0042] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0043] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0044] Referring to Figures 1 to 3, Figure 1 shows a schematic structural diagram of a transformer in an embodiment of the present application, and Figures 2 and 3 show exploded schematic diagrams of a primary mechanism 100 and a secondary mechanism 200 of a transformer in an embodiment of the present application. The transformer provided in an embodiment of the present application includes a primary mechanism 100 and a secondary mechanism 200, and the primary mechanism 100 and the secondary mechanism 200 are relatively arranged along the rotation axis of the transformer, that is, the primary mechanism 200 and the secondary mechanism are coupled to each other through their respective opposite surfaces, the outer diameter of the primary mechanism 200 is substantially the same as the outer diameter of the secondary mechanism, the gap between the primary mechanism 100 and the secondary mechanism 200 is 1 mm to 2 mm, and the secondary mechanism 200 can rotate circumferentially relative to the primary mechanism 100.

[0045] Specifically, the primary mechanism 100 includes a primary base 110, a primary magnetic core 120 and a primary coil 130. The primary base 110 is provided with a first accommodating groove 110A, the primary magnetic core 120 is arranged in the first accommodating groove 110A, the primary coil 130 is embedded in the primary magnetic core 120, and a plurality of first insulating spacers 111 are provided between the side wall of the primary magnetic core 120 and the groove wall of the first accommodating groove 110A. By means of the plurality of first insulating spacers 111, a first gap is formed between the side wall of the primary magnetic core 120 and the groove wall of the first accommodating groove 110A. Furthermore, the secondary side mechanism 200 includes a secondary side base 210, a secondary side magnetic core 220 and a secondary side coil 230, the secondary side base 210 is provided with a second accommodating groove 210A, the secondary side magnetic core 220 is arranged in the second accommodating groove 210A, the secondary side coil 230 is embedded in the secondary side magnetic core 220, and a plurality of second insulating spacers 211 are provided between the side wall of the secondary side magnetic core 220 and the groove wall of the second accommodating groove 210A, and a second gap is formed between the side wall of the secondary side magnetic core 220 and the groove wall of the second accommodating groove 210A by means of the plurality of second insulating spacers 211.

[0046] In the transformer described in the embodiment of the present application, the primary mechanism 100 is the fixed side, and the secondary mechanism 200 is the rotating side. By arranging the primary mechanism 100 and the secondary mechanism 200 relatively along the rotation axis, the energy or signal generated by the primary mechanism 100 can be transmitted to the secondary mechanism 200, and the secondary mechanism 200 can be connected to other rotating components to obtain the energy or signal transmitted by the primary mechanism 100. Specifically, a first accommodating groove 110A is provided on the end surface of the primary base 110, and the primary magnetic core 120 is placed in the first accommodating groove 110A. A second accommodating groove 210A is provided on the end surface of the secondary base 210, and the secondary magnetic core 220 is placed in the second accommodating groove 210A. A first gap is formed between the side wall of the primary magnetic core 120 and the groove wall of the first accommodating groove 110A by means of a plurality of first insulating spacers 111, so as to avoid contact between the side wall of the primary magnetic core 120 and the groove wall of the primary base 110, and a second gap is formed between the side wall of the secondary magnetic core 220 and the groove wall of the second accommodating groove 210A by means of the plurality of second insulating spacers 211, so as to avoid contact between the side wall of the secondary magnetic core 220 and the groove wall of the secondary base 210. At the same time, the first gap and the second gap facilitate the full flow and coverage of the potting glue when the potting glue is subsequently filled.

[0047] The transformer described in the embodiment of the present application sets the primary mechanism 100 and the secondary mechanism 200 as a relative surface coupling design, and the two do not need to be nested, so the volume is reduced compared with the prior art, and the volume can be made smaller while achieving efficient power conversion. Furthermore, by setting a plurality of first insulating pads 111 to separate a first gap, the primary magnetic core 120 is fixed in the center under the limit of the first insulating pad 111 and insulated from the primary base 110, and by setting a plurality of second insulating pads 211 to separate a second gap, the secondary magnetic core 220 is fixed in the center under the limit of the second insulating pad 211 and insulated from the secondary base 210, which can avoid the contact stress between the base and the magnetic core and cause the magnetic core to break, and make the transformer have good performance.

[0048] In an optional embodiment, the first insulating pad 111 and the second insulating pad 211 insulating gaskets are molded with tough plastic or silicone. The tough plastic or silicone can ensure that the insulating pad has a certain deformation, ensure that the pad is firmly against the magnetic core, and has insulation properties to meet the use requirements. In an optional embodiment, the primary magnetic core 120 and the secondary magnetic core 220 of the transformer are both made of manganese-zinc ferrite material. The manganese-zinc ferrite material has the characteristics of high saturation magnetic induction intensity, wide temperature, and low loss, and is suitable for frequency bands below 500kHz. Of course, according to actual needs, the magnetic core can be made and replaced with any conventional material.

[0049] As shown in combination with FIG. 4 and FIG. 5, FIG. 4 and FIG. 5 show the structural schematic diagram of the primary base 110 and the primary magnetic core 120 of the transformer in an embodiment of the present application. In some embodiments, the first accommodating groove 110A and the primary magnetic core 120 are both annular, and the outer side wall and the inner side wall of the first accommodating groove 110A are both provided with a plurality of first grooves 110B spaced apart along the circumferential direction, and the first insulating spacer 111 is provided in each first groove 110B. By evenly providing the first grooves 110B on the side wall of the first accommodating groove 110A, the first insulating spacer 111 can be embedded in the first groove 110B for positioning, so as to prevent the first insulating spacer 111 from moving during installation, and the primary magnetic core 120 can be conveniently clamped into the first insulating spacer 111, which has the advantage of convenient installation.

[0050] As shown in FIG. 7 and FIG. 8 , FIG. 7 and FIG. 8 show the schematic structural diagrams of the secondary base 210 and the secondary magnetic core 220 of the transformer in an embodiment of the present application. The second accommodating groove 210A and the secondary magnetic core 220 are both annular, and the outer side wall and the inner side wall of the second accommodating groove 210A are both provided with a plurality of second grooves 210B spaced apart along the circumferential direction, and the second insulating spacer 211 is provided in each second groove 210B. Similarly, by evenly providing the second grooves 210B on the side wall of the second accommodating groove 210A, the second insulating spacer 211 can be embedded in the second groove 210B for positioning, so as to prevent the second insulating spacer 211 from moving during installation, and the secondary magnetic core 220 can be conveniently clamped into the second insulating spacer 211, which has the advantage of convenient installation.

[0051] The embodiment of the present application forms a flow channel between the primary magnetic core 120 and the primary base 110, and between the secondary magnetic core 220 and the secondary base 210 through the first insulating spacer 111 and the first groove 110B, and the second insulating spacer 211 and the second groove 210B, so as to facilitate the flow of potting glue and the discharge of gas during potting, thereby forming a more uniform and stable insulating package as a whole.

[0052] Furthermore, in the subsequent glue pouring process, the first groove 110B and the second groove 210B can be used as glue pouring ports, which can ensure that the insulating glue enters from the grooves during glue pouring and is fully and evenly attached between the base and the magnetic core, thereby ensuring the overall performance and insulation performance of the primary side mechanism 100 and the secondary side mechanism 200 of the transformer.

[0053] In an optional embodiment, as shown in FIG. 4 and FIG. 5 , the primary base 110 is provided with a first through hole 110C, the primary magnetic core 120 is provided with a second through hole 120A, and the primary coil 130 is connected to an external circuit through the first through hole 110C and the second through hole 120A. By respectively providing the first through hole 110C and the second through hole 120A on the primary base 110 and the primary magnetic core 120, the primary coil 130 is led out of the ring of the primary magnetic core 120, and the lead end can be vertically passed through the bottom to lead out, and there is no need to make grooves on the inner and outer walls of the primary magnetic core 120 and the inner and outer walls of the primary base 110 for detour routing, making the structure simpler and more convenient to install.

[0054] Similarly, as shown in FIG. 7 and FIG. 8 , the secondary mechanism 200 further includes a circuit board 240, which is covered on the end surface of the secondary base 210, the secondary base 210 is provided with a third through hole 210C, the secondary magnetic core 220 is provided with a fourth through hole 220A, and the secondary coil 230 is electrically connected to the circuit board 240 through the third through hole 210C and the fourth through hole 220A. Specifically, the circuit board 240 is used to perform rectification and filtering on the current generated by the secondary coil 230. In the secondary mechanism 200, by respectively providing the third through hole 210C and the fourth through hole 220A on the secondary base 210 and the secondary magnetic core 220, the connection relationship between the lead of the secondary coil 230 and the back circuit board 240 is particularly optimized, and there is no need to cut a groove for detour routing, so that the structure is simpler and the installation is more convenient.

[0055] In an optional embodiment, the primary mechanism 100 further includes a primary frame 140, the primary coil 130 is wound inside the primary frame 140, and the primary frame 140 is arranged inside the primary magnetic core 120; the secondary mechanism 200 further includes a secondary frame 250, the secondary coil 230 is wound inside the secondary frame 250, and the secondary frame 250 is arranged inside the secondary magnetic core 220. By providing the primary frame 140 and the secondary frame 250, the primary coil 130 is wound on the primary frame 140, and the secondary coil 230 is wound on the secondary frame 250, so that the winding effect of the primary coil 130 and the secondary coil 230 is better and the stability is higher, and the primary frame 140 and the secondary frame 250 can separate the primary coil 130 from the primary magnetic core 120, and separate the secondary coil 230 from the secondary magnetic core 220, so as to form insulation and ensure the performance of the transformer.

[0056] Furthermore, the end face of the primary side frame 140 is uniformly provided with a plurality of first notches 140A or a plurality of first openings along the edge; the end face of the secondary side frame 250 is uniformly provided with a plurality of second notches 250A or a plurality of second openings along the edge. Specifically, the first notches 140A and the second notches 250A may be arc notches or sawtooth openings. By providing notches or holes in the unilateral wing portions of the primary side frame 140 and the secondary side frame 250, the flow of liquid glue during the coil glue filling process can be optimized, so that the flow speed of the liquid glue is fast and uniform, effectively filling the gap of the coil, accelerating the exhaust after glue filling, and having the advantage of good processing effect.

[0057] Furthermore, the primary frame 140 is provided with a first slot 140B and a fifth through hole 140C at a position corresponding to the first through hole 110C, the starting lead of the primary coil 130 is bent and led out from the fifth through hole 140C, and the terminal lead of the primary coil 130 is led out from the first slot 140B; the secondary frame 250 is provided with a second slot and a sixth through hole at a position corresponding to the second through hole 120A, the starting lead of the secondary coil 230 is bent and led out from the sixth through hole, and the terminal lead of the secondary coil 230 is led out from the second slot. By slotting and opening corresponding through holes on the primary frame 140 and the secondary frame 250, the lead end of the coil can be connected to an external circuit or circuit line 240 through the through hole, making the structure simpler and more convenient to install.

[0058] In another embodiment, the primary coil 130 and the secondary coil 230 may be fixed by using a U-shaped pad instead of a skeleton. Specifically, the primary mechanism 100 further includes a primary U-shaped pad 131, which is evenly buckled on the circumference of the primary coil 130, so that a third gap is formed between the primary coil 130 and the primary magnetic core 120; the secondary mechanism 200 further includes a secondary U-shaped pad 231, which is evenly buckled on the circumference of the secondary coil 230, so that a fourth gap is formed between the secondary coil 230 and the secondary magnetic core 220. By buckling the coil on the U-shaped pad, the U-shaped pad plays a positioning role on the coil, so that the primary coil 130 and the secondary coil 230 are shaped into a circular line shape, which is convenient for assembly into the magnetic core. Moreover, the U-shaped pad can form a gap between the coil and the magnetic core, which is convenient for subsequent glue filling to form insulation and ensure the performance of the transformer. In a preferred example, the coil using the U-shaped pad is made of a self-adhesive flat Litz film-wrapped wire, and the coil is demoulded after being heated after winding, so as to achieve a coil that does not loosen.

[0059] In an optional embodiment, since the secondary side mechanism 200 of the excitation rotary transformer rotates coaxially with respect to the primary side mechanism 100, a non-contact design with an air gap is required between the secondary side mechanism 200 and the primary side mechanism 100. Under the premise of unsaturated current, the smaller the air gap, the smaller the leakage current and the smaller the energy loss. The magnetic core combination of the primary side mechanism 100 and the secondary side mechanism 200 of the transformer adopts an asymmetric design with different cross-sectional widths. As shown in FIG10 , the difference between the width a of the outer ring wall of the primary side base 110 and the width b of the outer ring wall of the secondary side base 210 is greater than or equal to 2 times the magnetic core coaxiality tolerance y; and the difference between the width c of the inner ring wall of the primary side base 110 and the width d of the inner ring wall of the secondary side base 210 is greater than or equal to 2 times the magnetic core coaxiality tolerance y, that is, the width difference (ab) and (cd) are greater than or equal to 2 times the magnetic core coaxiality tolerance y. Thus, the stray magnetic field generated by the coaxial deviation between the secondary mechanism 200 and the primary mechanism 100 can be effectively reduced, thereby improving the stability of dynamic energy transmission.

[0060] In an optional embodiment, the gap between the first accommodating groove 110A and the primary magnetic core 120, and the gap between the primary magnetic core 120 and the primary coil 130 are filled with the first potting glue 150; the gap between the second accommodating groove 210A and the secondary magnetic core 220, and the gap between the secondary magnetic core 220 and the secondary coil 230 are filled with the second potting glue 260. By filling all the gaps between the base, the magnetic core and the coil with potting glue, it is ensured that the base, the magnetic core and the coil are insulated from each other, so that the transformer has good performance.

[0061] On the other hand, the present application also provides a motor, including the transformer 10, the motor rotor 20 and the rotating shaft 30 described in any of the above embodiments, the motor rotor 20 is sleeved on the rotating shaft 30, the rotation axis of the transformer 10 is the same as the axis of the rotating shaft 30, the primary side mechanism 100 is installed independently of the rotating shaft 30, and the secondary side mechanism 200 is connected to the rotating shaft 30 and can rotate with the rotating shaft 30.

[0062] The motor described in the embodiment of the present application drives the secondary mechanism 200 to rotate through the primary mechanism 100 of the transformer 10, so that the secondary mechanism 200 drives the motor rotor 20 and the rotating shaft 30 to rotate. The primary mechanism 100 of the transformer 10 is provided with a plurality of first insulating pads 111 to separate a first gap, so that the primary magnetic core 120 is centered and fixed under the limit of the first insulating pad 111 and is insulated from the primary base 110, and the secondary mechanism 200 is provided with a plurality of second insulating pads 211 to separate a second gap, so that the secondary magnetic core 220 is centered and fixed under the limit of the second insulating pad 211 and is insulated from the secondary base 210, which can avoid the contact stress between the base and the magnetic core causing the magnetic core to break, and make the transformer have good performance.

[0063] The transformer and the motor described in the embodiments of the present application have the following beneficial effects:

[0064] 1. By setting the primary side mechanism 100 and the secondary side mechanism 200 as a relative surface coupling design, the two do not need to be nested, so the volume is reduced compared with the prior art, and the volume can be made smaller while achieving efficient power conversion.

[0065] 2. A first gap is formed by setting a plurality of first insulating spacers 111, so that the primary magnetic core 120 is centered and fixed under the limit of the first insulating spacers 111 and insulated from the primary base 110; and a second gap is formed by setting a plurality of second insulating spacers 211, so that the secondary magnetic core 220 is centered and fixed under the limit of the second insulating spacers 211 and insulated from the secondary base 210. This can avoid the contact stress between the base and the magnetic core causing the magnetic core to break, and make the transformer have good performance.

[0066] 3. Through the first insulating spacer 111 and the first groove 110B, as well as the second insulating spacer 211 and the second groove 210B, flow channels are formed between the primary magnetic core 120 and the primary base 110, and between the secondary magnetic core 220 and the secondary base 210, which facilitate the flow of potting glue and the discharge of gas during potting, forming a more uniform and stable insulating package as a whole.

[0067] 4. The width differences (ab) and (cd) are greater than or equal to twice the core coaxiality tolerance y, which can effectively reduce the stray magnetic field generated by the coaxial deviation of the secondary mechanism 200 and the primary mechanism 100 and improve the stability of dynamic energy transmission.

[0068] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A transformer, characterized in that: Comprising a primary mechanism (100) and a secondary mechanism (200), the primary mechanism (100) and the secondary mechanism (200) being arranged relative to each other along the rotation axis of the transformer, and the secondary mechanism (200) being rotatable in a circumferential direction relative to the primary mechanism (100); The primary mechanism (100) comprises a primary base (110), a primary magnetic core (120) and a primary coil (130); the primary base (110) is provided with a first accommodating groove (110A); the primary magnetic core (120) is arranged in the first accommodating groove (110A); the primary coil (130) is embedded in the primary magnetic core (120); a plurality of first insulating spacers (111) are provided between the side wall of the primary magnetic core (120) and the groove wall of the first accommodating groove (110A); a first gap is formed between the side wall of the primary magnetic core (120) and the groove wall of the first accommodating groove (110A) by means of the plurality of first insulating spacers (111); The secondary side mechanism (200) comprises a secondary side base (210), a secondary side magnetic core (220) and a secondary side coil (230); the secondary side base (210) is provided with a second accommodating groove (210A); the secondary side magnetic core (220) is arranged in the second accommodating groove (210A); the secondary side coil (230) is embedded in the secondary side magnetic core (220); a plurality of second insulating spacers (211) are provided between the side wall of the secondary side magnetic core (220) and the groove wall of the second accommodating groove (210A); and a second gap is formed between the side wall of the secondary side magnetic core (220) and the groove wall of the second accommodating groove (210A) by means of the plurality of second insulating spacers (211).

2. The transformer according to claim 1, characterized in that: The first accommodating groove (110A) and the primary magnetic core (120) are both annular, the outer side wall and the inner side wall of the first accommodating groove (110A) are both provided with a plurality of first grooves (110B) spaced apart along the circumferential direction, and the first insulating spacer (111) is provided in each of the first grooves (110B); The second accommodating groove (210A) and the secondary magnetic core (220) are both annular, and the outer side wall and the inner side wall of the second accommodating groove (210A) are both provided with a plurality of second grooves (210B) spaced apart along the circumferential direction, and the second insulating spacer (211) is provided in each of the second grooves (210B).

3. The transformer according to claim 1, characterized in that: The primary base (110) is provided with a first through hole (110C), the primary magnetic core (120) is provided with a second through hole (120A), and the primary coil (130) is connected to an external circuit via the first through hole (110C) and the second through hole (120A); The secondary side mechanism (200) further comprises a circuit board (240), the circuit board (240) being covered on the end surface of the secondary side base (210), the secondary side base (210) being provided with a third through hole (210C), the secondary side magnetic core (220) being provided with a fourth through hole (220A), and the secondary side coil (230) being electrically connected to the circuit board (240) via the third through hole (210C) and the fourth through hole (220A).

4. The transformer according to claim 3, characterized in that: The primary mechanism (100) further comprises a primary frame (140), the primary coil (130) is wound inside the primary frame (140), and the primary frame (140) is arranged inside the primary magnetic core (120); the secondary mechanism (200) further comprises a secondary frame (250), the secondary coil (230) is wound inside the secondary frame (250), and the secondary frame (250) is arranged inside the secondary magnetic core (220).

5. The transformer according to claim 4, characterized in that: The end surface of the primary side frame (140) is evenly provided with a plurality of first notches (140A) or a plurality of first openings along the edge; the end surface of the secondary side frame (250) is evenly provided with a plurality of second notches (250A) or a plurality of second openings along the edge.

6. The transformer according to claim 4, characterized in that: The primary side frame (140) is provided with a first slot (140B) and a fifth through hole (140C) at a position corresponding to the first through hole (110C); the starting lead of the primary coil (130) is bent and led out from the fifth through hole (140C), and the end lead of the primary coil (130) is led out from the first slot (140B); the secondary side frame (250) is provided with a second slot and a sixth through hole at a position corresponding to the second through hole (120A); the starting lead of the secondary coil (230) is bent and led out from the sixth through hole, and the end lead of the secondary coil (230) is led out from the second slot.

7. The transformer according to claim 1, characterized in that: The primary side mechanism (100) further comprises a primary side U-shaped pad (131), the primary side U-shaped pad (131) being evenly buckled on the circumference of the primary side coil (130), so that a third gap is formed between the primary side coil (130) and the primary side magnetic core (120); the secondary side mechanism (200) further comprises a secondary side U-shaped pad (231), the secondary side U-shaped pad (231) being evenly buckled on the circumference of the secondary side coil (230), so that a fourth gap is formed between the secondary side coil (230) and the secondary side magnetic core (220).

8. The transformer according to any one of claims 1 to 7, characterized in that: The difference between the width of the outer annular wall of the primary base (110) and the width of the outer annular wall of the secondary base (210) is greater than or equal to 2 times the coaxiality tolerance of the magnetic core; and The difference between the width of the inner ring wall of the primary base (110) and the width of the inner ring wall of the secondary base (210) is greater than or equal to twice the coaxiality tolerance of the magnetic core.

9. The transformer according to claim 8, characterized in that: The gap between the first containing groove (110A) and the primary magnetic core (120), and the gap between the primary magnetic core (120) and the primary coil (130) are both filled with a first potting compound (150); the gap between the second containing groove (210A) and the secondary magnetic core (220), and the gap between the secondary magnetic core (220) and the secondary coil (230) are both filled with a second potting compound (260).

10. A motor, characterized in that: include: A motor rotor (20) and a rotating shaft (30), wherein the motor rotor (20) is sleeved on the rotating shaft (30); The transformer (10) according to any one of claims 1 to 9, wherein the rotation axis of the transformer (10) is the same as the axis of the rotating shaft (30), the primary mechanism (100) is installed independently of the rotating shaft (30), and the secondary mechanism (200) is connected to the rotating shaft (30) and can rotate with the rotating shaft (30).

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