Magnetic integrated transformer, electrical device and vehicle

Abstract

The application provides a magnetic integrated transformer, an electrical device and a vehicle, comprising a main magnetic core, a leakage magnetic core, a skeleton assembly, a primary winding and a secondary winding, the skeleton assembly comprises a main skeleton and a side skeleton, the main skeleton is provided with a center ring column and two main baffles, the inside of the side skeleton is provided with the leakage magnetic core, the side skeleton is connected with the main baffle at a corresponding end, the primary winding is wound on the main skeleton, and the secondary winding is wound on the leakage magnetic core and the outer periphery of the primary winding. The application is not only convenient for winding and assembling the magnetic core, but also simple and accurate in position of the leakage magnetic core. The leakage magnetic field of the leakage magnetic core is high in magnetic permeability, and the volume of the leakage magnetic circuit is greatly reduced, so that the overall volume of the device is reduced. By controlling the air gap size between the magnetic cores, the size of the required leakage inductance can be accurately controlled. The leakage magnetic field is mainly concentrated in one or several magnetic cores, and the loss of high-frequency effect is effectively reduced, and the efficiency of the transformer is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transformers, in particular to a magnetic integrated transformer, an electrical device and a vehicle. BACKGROUND

[0002] The isolation conversion circuit topology adopted by the on-board power supply of a new energy vehicle, including an on-board charger (OBC) and an on-board DCDC, mainly has a CLLL resonant converter, a DAB converter and a phase-shifted full-bridge converter, and the common feature of these circuits is that, in addition to an isolation transformer, a resonant inductor is connected in series with the primary winding and / or the secondary winding of the transformer. In early power supply products, the transformer and the resonant inductor are two or three independent devices, which are large in size and high in cost. With the development of magnetic integration technology, more and more products integrate these devices together to become one device, saving size and reducing cost. Among them, the most traditional magnetic integration method is to wind the primary winding and the secondary winding of the transformer apart by a certain distance in the physical space, so that the two windings cannot be fully coupled to form a large leakage inductance, and the leakage inductance is used as the resonant inductor in the circuit.

[0003] However, the above-mentioned traditional transformer, especially the magnetic integration method of winding the primary winding and the secondary winding apart, has the following disadvantages. First, the leakage inductance magnetic circuit mainly passes through the air gap, and in order to achieve a large inductance, the distance between the primary winding and the secondary winding will be relatively large, so the size of the integrated device is still relatively large. Second, the size of the leakage inductance is mainly related to the structure of the transformer, and the size of the required resonant inductance cannot be accurately controlled. Third, a large part of the leakage inductance magnetic field will pass through the primary winding and the secondary winding, and the high-frequency effect will cause additional power consumption of the coil, reducing the efficiency of the converter and increasing the difficulty of heat dissipation of the device.

[0004] In addition, the heat dissipation method of the on-board power supply of a new energy vehicle is mainly water cooling, especially to match the power tube patch heat dissipation method, the planar water cooling heat dissipation method will become the mainstream heat dissipation method of the on-board power supply, and for magnetic elements, how to fully conduct the heat of itself to the water cooling heat dissipation surface will be a great test.

[0005] The general transformer currently mainly adopts the structure of wrapping the winding with a magnetic core, and the winding is the main heat source in the magnetic element. Due to the wrapping and blocking effect of the magnetic core, it is difficult for the heat of the winding to be smoothly conducted to the water cooling heat dissipation surface, which in turn affects the overall heat dissipation effect. SUMMARY

[0006] The first object of the present application is to provide a magnetic integrated transformer which is convenient to produce and manufacture and can accurately control the resonant inductance.

[0007] The second object of the present application is to provide an electrical device having the above-mentioned magnetic integrated transformer.

[0008] A third object of the present application is to provide a vehicle with the above magnetic integrated transformer.

[0009] In order to achieve the first object of the present application, the present application provides a magnetic integrated transformer, comprising a main magnetic core, a leakage magnetic core, a skeleton assembly, a primary winding and a secondary winding; the skeleton assembly comprises a main skeleton and a side skeleton, the main skeleton is provided with a center ring column and two main baffles, the two main baffles are respectively located at both ends of the center ring column in the height direction, a through hole is provided in the center ring column along the height direction, a first wire slot is formed on the outer periphery of the center ring column, and the primary winding is wound in the first wire slot; the side skeleton extends along the height direction, an installation slot is arranged in the inside of the side skeleton, and the end of the side skeleton in the height direction is connected with the main baffle at the corresponding end; the leakage magnetic core is located in the installation slot and between the two main baffles; a second wire slot is formed on the outer periphery of the side skeleton, and the secondary winding is wound in the second wire slot and around the leakage magnetic core and the primary winding; the main magnetic core comprises two cross beams, a side column and a core column, the side column and the core column are respectively connected between the two cross beams, the core column passes through the through hole, and the side column is located outside the second wire slot.

[0010] As can be seen from the above scheme, the primary winding is first wound on the main skeleton, and the leakage magnetic core is pre-installed in the installation slot of the side skeleton, and then the accurate installation and positioning of the leakage magnetic core are completed when the side skeleton is connected with the main baffle of the main skeleton, and then the secondary winding is wound in the second wire slot and around the leakage magnetic core and the primary winding, and finally the main magnetic core is assembled, so that the winding and the assembly of the magnetic core are facilitated, the assembly of the leakage magnetic core is simple and the position is accurate and stable, and the leakage magnetic field passes through the leakage magnetic core with high magnetic permeability instead of air, so that the volume of the leakage magnetic circuit is greatly reduced, thereby reducing the overall volume of the device, the size of the required leakage inductance can be accurately controlled by controlling the air gap size between the magnetic cores, the leakage magnetic field is mainly concentrated in one or several magnetic cores, and is not scattered in the primary and secondary windings, thereby reducing the loss of high frequency effect and improving the efficiency of the converter.

[0011] Further, the side skeleton is provided with a side peripheral wall and two side baffles, the side peripheral wall extends along the height direction, the two side baffles are respectively connected at both ends of the side peripheral wall in the height direction, and the installation slot is arranged in the inside of the side peripheral wall, and the side baffle at one end is connected with the main baffle at the corresponding end.

[0012] As can be seen above, the installation slot is surrounded by the side peripheral wall and the two side baffles, and the side baffle can be conveniently and accurately positioned and connected with the main baffle.

[0013] Further, the side baffle is provided with a clamping groove, and the main baffle is inserted into the clamping groove.

[0014] As can be seen above, the main baffle and the clamping groove can accurately position and install the side skeleton.

[0015] Further, the side baffle is provided with a first clamping part, the main baffle is provided with a second clamping part, and the first clamping part is clamped with the second clamping part.

[0016] Further, the side baffle is provided with a first connecting hole, the main baffle is provided with a second connecting hole, and the first connecting hole is connected with the second connecting hole through a rivet.

[0017] From the above, the fixed connection mode has many kinds, including the connection mode of buckle or rivet, which is convenient to assemble and position.

[0018] Further, the installation slot is provided with a loading entrance towards the center ring column, and the side frame is provided with a limiting clamping part on both sides of the loading entrance.

[0019] From the above, the leakage magnetic core can be loaded from the loading entrance, and the limiting clamping parts on both sides can limit and fix the leakage magnetic core, thereby making the position of the leakage magnetic core accurate.

[0020] Further, the magnetic integrated transformer includes a plurality of leakage magnetic cores, the side frame is provided with a plurality of installation slots, the plurality of installation slots are arranged along the height direction, there is a partition plate between adjacent two installation slots, and one leakage magnetic core is installed in one installation slot.

[0021] From the above, if the single air gap of the leakage magnetic circuit is large, the magnetic field in this place will still spread to the surrounding line package to a large extent, thereby causing high-frequency effect loss, the present case arranges a plurality of leakage magnetic cores and installation slots, and cooperates with the arrangement of the partition plate, so that the adjacent leakage magnetic cores are arranged with a fixed gap, that is, the leakage magnetic cores are segmented and placed, so that the air gap between each segment of the leakage magnetic core is kept at a preset fixed size, which can effectively avoid the leakage magnetic field from scattering into the line package to cause additional high-frequency loss, and this measure can further improve the efficiency of the transformer.

[0022] Further, the framework assembly includes two side frames, each of the installation slots of the side frames is provided with a leakage magnetic core, the two side frames are connected with the main baffle, and the secondary winding is wound in the second wire slot of the two side frames.

[0023] Further, the main baffle is provided with a protruding part on the radially opposite sides of the center ring column, the protruding part is connected with the end part of the height direction of the side frame, and the two side frames are located on the radially opposite sides of the center ring column; the main magnetic core includes two side columns, the core column is located between the two side columns, and one side column is located outside the second wire slot of the side frame on the same side.

[0024] From the above, through the arrangement of the two side skeletons and winding the secondary winding in the second wire slot of the two side skeletons, the magnetic integrated transformer has multiple magnetic circuit modes, which can be changed into different types of power transformers according to actual application to adapt to more different electrical equipment.

[0025] Further, the main magnetic core is an EE type magnetic core, an EI type magnetic core, an EQ type magnetic core or an EQI type magnetic core.

[0026] From the above, through the arrangement of the different main magnetic cores, the adaptability of the transformer can be improved.

[0027] Further, the primary winding and the secondary winding are both single-layer winding, the primary winding includes a primary winding curved part and a primary winding straight part, the secondary winding includes a secondary winding curved part and a secondary winding straight part, the primary winding curved part is located between the two protruding parts on the same side, the secondary winding curved part is located in the second wire slot, and the secondary winding straight part is located outside the primary winding straight part and adjacent to the primary winding straight part.

[0028] From the above, through the single-layer winding of the primary winding and the secondary winding, the primary winding and the secondary winding are closely adjacent at the position of the straight part, then most of the coil of the straight part can be exposed on the surface of the transformer, which is convenient for heat conduction to the water-cooled plane, and then the overall heat dissipation effect of the transformer is improved.

[0029] In order to achieve the second object of the present application, the present application provides an electrical equipment comprising the magnetic integrated transformer according to the above scheme.

[0030] In order to achieve the third object of the present application, the present application provides a vehicle comprising the magnetic integrated transformer according to the above scheme. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a structural diagram of an embodiment of the magnetic integrated transformer of the present application.

[0032] Figure 2 is a structural diagram of an embodiment of the magnetic integrated transformer of the present application from another perspective.

[0033] Figure 3 is an exploded view of an embodiment of the magnetic integrated transformer of the present application.

[0034] Figure 4 is a structural diagram of a skeleton assembly in an embodiment of the magnetic integrated transformer of the present application.

[0035] Figure 5 is an exploded view of a skeleton assembly in an embodiment of the magnetic integrated transformer of the present application.

[0036] Figure 6 is a sectional view of an embodiment of the magnetic integrated transformer of the present application at the straight part.

[0037] Figure 7 is a sectional view of the magnetic integrated transformer embodiment of the present application at the leakage inductance magnetic core.

[0038] Figure 8 is a schematic diagram of the magnetic circuit of the magnetic integrated transformer embodiment of the present application.

[0039] Figure 9 is a schematic diagram of the application connection of the magnetic integrated transformer embodiment of the present application.

[0040] Figure 10 is a schematic diagram of the structure of another embodiment of the magnetic integrated transformer of the present application.

[0041] The present application is further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0042] Referring to Figures 1 to 8 , the magnetic integrated transformer comprises a main magnetic core 11, a plurality of leakage inductance magnetic cores 23, a skeleton assembly 2, a primary winding 12 and a secondary winding 13, the skeleton assembly 2 comprises a main skeleton 21 and two side skeletons 22, the main skeleton 21 is provided with a center ring column 211 and two main baffles 214, the two main baffles 214 are respectively located at both ends of the height direction Z of the center ring column 211, a through hole 212 is provided through the inside of the center ring column 211 along the height direction Z, a first wire slot 213 is formed on the outer periphery of the center ring column 211, the first wire slot 213 is circular, track-shaped or elliptical, in this case, the first wire slot 213 is track-shaped, i.e. having semicircular portions on the horizontal two sides and flat portions on the middle two sides, the primary winding 12 can be wound with flat wires, the primary winding 12 is wound in one layer, after the primary winding 12 is wound in the first wire slot 213, the primary winding 12 forms primary winding curved portions 121 on both sides and primary winding flat portions 122 on both sides.

[0043] The two main baffles 214 on the upper and lower sides of the height direction Z are respectively provided with protruding portions 215, the protruding portions 215 protrude from the diametrically opposite sides of the center ring column 211 along the horizontal two sides, each protruding portion 215 is provided with a second clamping portion 217 in the middle, the second clamping portion 217 is arranged in the form of a clamping hole, the protruding portion 215 is provided with a second connecting hole 216 on both sides of the second clamping portion 217, the protruding portion 215 is provided with a positioning step 218 on the outer edge of the opposite sides, the inner end of the positioning step 218 has a stop block 219.

[0044] The side skeleton 22 extends along the height direction Z, and is provided with a side peripheral wall 221 and two side baffles 223. The side peripheral wall 221 extends in an arc shape and extends along the height direction Z. The two side baffles 223 are respectively connected to the two ends of the side peripheral wall 221 along the height direction Z. A first clamping portion 225 is arranged on the middle portion of the side baffle 223. The first clamping portion 225 is arranged in the form of a clamping block. The first connecting hole 226 is arranged on both sides of the first clamping portion 225. Two L-shaped limiting blocks are arranged on the outer end face of the extension portion 215 along the height direction Z. The two L-shaped limiting blocks are located outside the first connecting hole 226. The two L-shaped limiting blocks and the outer end face of the side baffle 223 along the height direction Z form a clamping groove 224. The extension direction of the clamping groove 224 is the same as the extension direction of the extension portion 215.

[0045] The inside of the side peripheral wall 221 is provided with a plurality of mounting grooves 227. The plurality of mounting grooves 227 are arranged along the height direction Z. The adjacent two mounting grooves 227 have a partition plate 229 arranged along the horizontal direction. One leakage magnetic core 23 is mounted in one mounting groove 227. Each mounting groove 227 is provided with a mounting opening facing the center ring column 211. The side peripheral wall 221 is provided with a limiting clamping portion 228 on both sides of the mounting opening. The limiting clamping portion 228 is used to limit the position of the leakage magnetic core 23.

[0046] The end of the side skeleton 22 along the height direction Z is connected to the main baffle 214 corresponding to one end, that is, the side baffle 223 of one end is connected to the main baffle 214 corresponding to one end. The main baffle 214 is inserted into the clamping groove 224. The extension portion 215 and the outer end face of the side baffle 223 along the height direction Z are adjacent. The first clamping portion 225 and the second clamping portion 217 are clamped. The first connecting hole 226 and the second connecting hole 216 are opposite. The first connecting hole 226 and the second connecting hole 216 are connected by a rivet. The positioning step 218 is in clearance fit with the L-shaped limiting block. The stop block 219 is adjacent to the L-shaped limiting block. The two side skeletons 22 are respectively located on the diametrically opposite sides of the center ring column 211. The side skeleton 2 is located between the two extension portions 215. Then, the plurality of leakage magnetic cores 23 are arranged along the height direction Z and are arranged with the thickness of the partition plate 229 being spaced apart. The plurality of leakage magnetic cores 23 are located between the two extension portions 215.

[0047] The outer periphery of the side peripheral wall 221 is formed with a second wire slot 222, the edges of the two side baffles 223 protrude outward from the outer periphery of the side peripheral wall 221, and the secondary side winding 13 is wound in the second wire slot 222. Then, the edges of the side baffles 223 can limit the secondary side winding 13. Specifically, the secondary side winding 13 is wound in the second wire slot 222 of the two side skeletons 22, and at the same time, the secondary side winding 13 is also wound around the outer periphery of the leakage magnetic core 23 and the primary winding 12. The secondary side winding 13 can be wound with flat wire, and the secondary side winding 13 is wound in one layer. The secondary side winding 13 includes a secondary side curved portion 131 and a secondary side straight portion 132. The primary curved portion 121 is located between the two protruding portions 215 on the same side. The secondary side curved portion 131 is located in the second wire slot 222. The secondary side straight portion 132 is located on the outer side of the primary straight portion 122 and is adjacent to the primary straight portion 122. The end face of the main magnetic core 11 corresponding to the secondary side straight portion 132 is also arranged straight, that is, the side surface of the main magnetic core 11 is coplanar with the outer surface of the secondary side straight portion 132. Then, it is beneficial to fit the heat dissipation device.

[0048] The main magnetic core 11 can adopt an EE type magnetic core, an EI type magnetic core, an EQ type magnetic core or an EQI type magnetic core. In this embodiment, the main magnetic core 11 adopts an EE type magnetic core. The main magnetic core 11 includes two E type magnetic cores 111. Each E type magnetic core 111 includes a cross beam 112, two side columns 113 and a core column 114. The core column 114 is located between the two side columns 113. After the two E type magnetic cores 111 are connected, the side columns 113 and the core column 114 are connected between the two cross beams 112. The core column 114 passes through the through hole 212. One side column 113 is located on the outer side of the second wire slot 222 of the same side skeleton 22. A plurality of leakage magnetic cores 23 are located between the two cross beams 112.

[0049] Referring to Figure 8 and Figure 9 , the connection application of the magnetic integrated transformer of the case is shown in Figure 9 . The primary winding 12 is connected to the input end, and the secondary winding 13 is connected to the output end. When the primary winding 1 is energized, the main magnetic flux generated by the primary winding 1 passes through the core column 114, the two side columns 113 and the two cross beams 112, and returns to the core column 114. The leakage magnetic field passes through the leakage magnetic cores 23 with high magnetic permeability instead of air. The secondary leakage magnetic flux passes through the plurality of leakage magnetic cores 23 as shown in Figure 8 . The plurality of leakage magnetic cores 23 are arranged in sections, so that the air gap between each section of the leakage magnetic core is kept at a small size, which can effectively avoid the leakage magnetic field from scattering into the wire package to cause additional high-frequency loss. In this way, the volume occupied by the leakage magnetic circuit can be greatly reduced, thereby reducing the overall volume of the device. By controlling the air gap size between the magnetic cores, the required leakage inductance can be accurately controlled. The leakage magnetic field is mainly concentrated in one or several magnetic cores and does not scatter in the primary and secondary winding, thereby reducing the loss of high-frequency effect and further improving the efficiency of the converter.

[0050] Electrical equipment embodiment:

[0051] The electrical equipment includes the magnetic integrated transformer of the above-mentioned embodiments. The electrical equipment can be equipment including but not limited to motor controllers, on-board chargers, on-board power supplies, inverters or transformers, etc.

[0052] Vehicle embodiment:

[0053] The vehicle includes the electrical equipment as in the above-mentioned solutions, and the vehicle can be a new energy electric car, a new energy electric bus, a new energy electric truck, a new energy electric cleaning vehicle, a new energy electric rail vehicle, a new energy electric flying vehicle, a new energy electric shipping vehicle, etc.

[0054] Of course, the above-mentioned embodiments are only preferred embodiments of the present case, and there can be more changes in specific applications, for example, the magnetic integrated transformer can also adopt a single-sided skeleton arrangement, as shown in Figure 10 The single-sided skeleton assembly is connected with the main baffle, the primary winding 12 is wound in the first wire slot of the main skeleton, a plurality of leakage magnetic cores 23 are arranged in the skeleton assembly, the secondary winding 13 is wound in the second wire slot of the side skeleton, the secondary winding 13 is wound around the leakage magnetic core 23 and the outer periphery of the primary winding 12, and the main magnetic core can be arranged in a UI type, a double U type or an O type, which can also achieve the purpose of the present case.

[0055] In addition, the design and connection mode of the side skeleton have various forms, the side skeleton can be connected with the main skeleton without a side baffle, and two or more side skeletons can also be arranged, and the side skeleton can be arranged on the same side or in an L type, which can be adjusted according to the use scene of the transformer. Of course, the arrangement of a single leakage magnetic core can also achieve the purpose of the present case.

[0056] As can be seen from the above, the primary winding is first wound on the main skeleton, and the leakage magnetic core is preloaded into the mounting slot of the side skeleton, and then the side skeleton is connected with the main baffle of the main skeleton, and then the precise installation and positioning of the leakage magnetic core are completed, and then the secondary winding is wound in the second wire slot and around the leakage magnetic core and the outer periphery of the primary winding, and finally the main magnetic core is assembled to complete the present case. The present case not only facilitates the winding of the winding and the assembly of the magnetic core, but also is beneficial to automatic production and assembly. The assembly of the leakage magnetic core is simple and the position is accurate and stable. Moreover, the leakage magnetic field passes through the leakage magnetic core with high magnetic permeability instead of air, and the volume of the leakage magnetic circuit is greatly reduced, thereby reducing the overall volume of the device. By controlling the air gap size between the magnetic cores, the size of the required leakage can be accurately controlled. The leakage magnetic field is mainly concentrated in one or several magnetic cores, and does not scatter in the primary and secondary windings, thereby reducing the loss of high-frequency effect and improving the efficiency of the transformer.

Claims

1. A magnetic integrated transformer, comprising a main magnetic core, a leakage magnetic core, a skeleton assembly, a primary winding and a secondary winding, characterized in that: the skeleton assembly comprises a main skeleton and a side skeleton, the main skeleton is provided with a central ring column and two main baffles, the two main baffles are respectively located at two ends of the central ring column in a height direction, a through hole is provided in the central ring column along the height direction, a first wire slot is formed on the outer periphery of the central ring column, and the primary winding is wound in the first wire slot; the side skeleton extends along the height direction, an installation slot is arranged in the side skeleton, an end of the side skeleton is connected with the main baffle at the corresponding end in the height direction, the leakage magnetic core is located in the installation slot and between the two main baffles, a second wire slot is formed on the outer periphery of the side skeleton, and the secondary winding is wound in the second wire slot; the main magnetic core comprises two cross beams, a side column and a core column, the side column and the core column are respectively connected between the two cross beams, the core column passes through the through hole, and the side column is located outside the second wire slot; the side skeleton is provided with a side peripheral wall and two side baffles, the side peripheral wall extends along the height direction, the two side baffles are respectively connected at two ends of the side peripheral wall in the height direction, and the installation slot is arranged in the side peripheral wall. 2.The magnetic integrated transformer according to claim 1, characterized in that: the side baffle is provided with a clamping groove, and the main baffle is inserted into the clamping groove. 3.The magnetic integrated transformer according to claim 2, characterized in that: the side baffle is provided with a first clamping part, the main baffle is provided with a second clamping part, and the first clamping part is clamped with the second clamping part. 4.The magnetic integrated transformer according to claim 2, characterized in that: the side baffle is provided with a first connecting hole, the main baffle is provided with a second connecting hole, and the first connecting hole and the second connecting hole are connected by a rivet. 5.The magnetic integrated transformer according to claim 1, characterized in that: the installation slot is provided with a loading port facing the central ring column, and the side skeleton is provided with a limiting clamping part on both sides of the loading port. 6.The magnetic integrated transformer according to claim 1, characterized in that: the magnetic integrated transformer comprises a plurality of leakage magnetic cores, the side skeleton is provided with a plurality of installation slots, the plurality of installation slots are arranged along the height direction, a partition plate is arranged between adjacent two installation slots, and one leakage magnetic core is arranged in one installation slot. 7.The magnetic integrated transformer according to any one of claims 1 to 6, characterized in that: the skeleton assembly comprises two side skeletons, the installation slot of each side skeleton is provided with the leakage magnetic core, the two side skeletons are connected with the main baffles, and the secondary winding is wound in the second wire slot of the two side skeletons. 8.The magnetic integrated transformer according to claim 7, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The main baffle is provided with an extension part on each of the diametrically opposite sides of the central ring column, and the extension part is connected with the end part of the height direction of the side frame. The main magnetic core comprises two side columns, the core column is located between the two side columns, and one side column is located outside the second wire slot of the side frame on the same side.

9. The magnetic integrated transformer of claim 8, wherein: The main magnetic core is an EE type magnetic core, an EI type magnetic core, an EQ type magnetic core, or an EQI type magnetic core.

10. The magnetic integrated transformer of claim 8, wherein: The primary winding and the secondary winding are both wound in one layer, the primary winding comprises a primary winding curved part and a primary winding straight part, the secondary winding comprises a secondary winding curved part and a secondary winding straight part, the primary winding curved part is located between the two extension parts on the same side, the secondary winding curved part is located in the second wire slot, and the secondary winding straight part is located outside and adjacent to the primary winding straight part.

11. An electrical device, characterised in that, The magnetic integrated transformer according to any one of claims 1 to 10.

12. Vehicle, characterized in that The magnetic integrated transformer according to any one of claims 1 to 10.

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