EMC (Electro Magnetic Compatibility) device capable of improving inductance value
By using P and N pole flat winding components designed with multi-turn copper coil in EMC device, the problem that the existing technology cannot meet the requirements of high-end performance models for electromagnetic compatibility levels is solved, and high-efficiency filtering effect is achieved and Miniaturized, low-cost device design.
Patent Information
- Application Number
- CN202310957831.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-08-01
- Publication Date
- 2025-02-14
AI Technical Summary
The EMC devices of existing inverters cannot meet the requirements of CLASS 5 and above for electromagnetic compatibility levels of high-end performance models, and in order to achieve the ideal filtering effect, multiple order filtering topology must be adopted, resulting in large size and high cost of the device.
P and N pole flat winding components designed with multi-turn copper wire coils, the magnetic body passes through the multi-turn copper wire coil insulated by enameled to increase impedance and inductance, thereby improving the filtering effect of the EMC device and reducing volume .
Under the same working conditions and size, the filtering effect of the EMC device is significantly improved, the device size and cost are reduced, and there is no need to achieve high electromagnetic compatibility effect by increasing the order of the magnetic body and Y capacitance.
Smart Images
Figure CN119446712A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of electric drive, and in particular to an EMC device capable of increasing inductance. Background Art
[0002] New energy vehicle technology is constantly upgrading and innovating, and product competitiveness has been significantly enhanced, becoming more and more popular among consumers at home and abroad. As the core component of the power system of new energy vehicles, the technical requirements for inverters are becoming more and more stringent. In the past, the electromagnetic compatibility requirements of the whole vehicle for inverters generally required meeting the CLASS 3 level. As the whole vehicle becomes more and more intelligent, the integration of internal electronic devices is also getting higher and higher, and the various signal interference problems that come with it are becoming more and more prominent. Now some high-end performance models on the market have already required the electromagnetic compatibility level of inverters to reach CLASS 5 and above. Looking to the future, as the technology of artificial intelligence and autonomous driving in automobiles improves and matures, the electromagnetic compatibility requirements of the whole vehicle for inverters will definitely become more and more stringent.
[0003] However, conventional inverter filter devices on the market are generally 2nd or 4th order topology layouts, namely CL (capacitor-inductor) or CLCL (capacitor-inductor-capacitor-inductor), and are structurally composed of a combination of magnetic body, Y capacitor and current-carrying copper busbar. A single turn of the copper busbar passes through the magnetic body, which can only meet the electromagnetic compatibility requirements of no more than CLASS 3. To meet the requirements of electromagnetic compatibility level of CLASS 5 and above, the current solutions can only try to adopt more order filter topologies, superimpose inductor and capacitor orders, that is, add more groups of magnetic body plus Y capacitor structure layout, which makes the filter device very large, not only taking up too much internal space of the controller and increasing material costs, but also the filtering effect is not satisfactory. Summary of the invention
[0004] The purpose of the present invention is to provide an EMC device that can increase the inductance. The P-pole flat winding assembly and the N-pole flat winding assembly both adopt a design of multi-turn copper bar coils. The magnetic body passes through the multi-turn copper bar coils insulated by enameled wire, which is equivalent to the effect of a single-turn copper bar passing through multiple magnetic bodies, thereby increasing the impedance and inductance. Under the same working conditions and size, the filtering effect of the EMC device can be greatly improved. Compared with the existing controller filters, which are all composed of a combination of magnetic bodies and copper bars, a single turn of the copper bar passes through the magnetic body, and the inductance on the magnetic body is small. In order to achieve an ideal filtering effect, a multi-order filtering topology must be adopted, that is, a structural layout method of adding multiple groups of magnetic bodies plus Y capacitors is adopted, which also greatly reduces the volume of the entire device.
[0005] The purpose of the present invention can be achieved by the following technical solutions:
[0006] An EMC device capable of increasing inductance comprises an upper cover, a P-pole flat winding assembly, an N-pole flat winding assembly, a magnetic body and a base, wherein the P-pole flat winding assembly, the N-pole flat winding assembly and the magnetic body are all arranged on the base, the upper cover is connected to the base and forms an inner cavity for accommodating the P-pole flat winding assembly, the N-pole flat winding assembly and the magnetic body with the base, the P-pole flat winding assembly comprises a first multi-turn copper bar coil, and a P-pole input terminal and a P-pole output terminal respectively arranged at both ends of the first multi-turn copper bar coil, the N-pole flat winding assembly comprises a second multi-turn copper bar coil, and an N-pole input terminal and an N-pole output terminal respectively arranged at both ends of the second multi-turn copper bar coil, and the magnetic body is arranged through the first multi-turn copper bar coil and the second multi-turn copper bar coil at the same time.
[0007] The surfaces of the first multi-turn copper bar coil and the second multi-turn copper bar coil are both provided with insulating paint.
[0008] The magnetic body includes a first magnetic ring and a second magnetic ring, wherein the first magnetic ring passes through the first multi-turn copper row coil and the second multi-turn copper row coil and wraps the first side of the first multi-turn copper row coil and the second multi-turn copper row coil.
[0009] The second magnetic ring passes through the first multi-turn copper coil and the second multi-turn copper coil and wraps the second side of the first multi-turn copper coil and the second multi-turn copper coil.
[0010] The first side edge and the second side edge are arranged opposite to each other.
[0011] The first multi-turn copper bar coil and the second multi-turn copper bar coil have the same number of turns.
[0012] The first multi-turn copper bar coil and the second multi-turn copper bar coil each include a coil body and a first lead-out section and a second lead-out section provided at two ends of the coil body.
[0013] The first lead-out section and the second lead-out section of the first multi-turn copper bar coil and the second multi-turn copper bar coil are respectively located on two sides of the magnetic body.
[0014] The winding shape of the coil body is a rounded square.
[0015] A magnetic body installation cavity is arranged in the base, and the first multi-turn copper bar coil and the second multi-turn copper bar coil are placed in the magnetic body installation cavity after passing through the winding copper bar.
[0016] The device also includes a compression strip, which is fixed to the side wall of the base and is used to compress the first-order magnetic body and the second-order magnetic body.
[0017] The device also includes a first-order grounding capacitor, a secondary-order grounding capacitor, a first-order grounding plate and a secondary-order grounding plate. The P-pole flat winding assembly is respectively connected to the first-order grounding capacitor and the first-order grounding plate, and the N-pole flat winding assembly is respectively connected to the secondary-order grounding capacitor and the secondary-order grounding plate.
[0018] The first-order grounding capacitor, the second-order grounding capacitor, the first-order grounding plate and the second-order grounding plate are all arranged on the base.
[0019] Compared with the prior art, the present invention has the following beneficial effects:
[0020] 1. Both the P-pole flat winding assembly and the N-pole flat winding assembly adopt the design of multi-turn copper bar coil. The magnetic body passes through the multi-turn copper bar coil insulated by enameled wire, which is equivalent to the effect of a single-turn copper bar passing through multiple magnetic bodies, increasing the impedance and inductance. Under the same working conditions and size, it can greatly improve the filtering effect of the EMC device. Compared with the existing controller filters, which are composed of a combination of magnetic bodies and copper bars, a single turn of the copper bar passes through the magnetic body, and the inductance on the magnetic body is small. In order to achieve the ideal filtering effect, a multi-order filtering topology must be adopted, that is, a structural layout method of adding multiple groups of magnetic bodies plus Y capacitors, which also greatly reduces the volume of the entire device.
[0021] 2. The first magnetic ring and the second magnetic ring both wrap the P-pole flat winding assembly and the N-pole flat winding assembly therein, and the two sides of the wrapping are arranged opposite to each other. Combined with the winding shape of the coil body being a rounded square, the gap can be reduced, thereby reducing the volume.
[0022] 3. The first lead-out section and the second lead-out section of the first multi-turn copper bar coil and the second multi-turn copper bar coil are respectively located on both sides of the magnetic body. By staggering the arrangement, the space utilization rate can be improved, thereby reducing the volume.
[0023] 4. The designed EMC device has a very small size and cost. In order to meet the vehicle's electromagnetic compatibility CLASS 5 requirements, the existing EMC device must adopt a multi-order filtering topology by increasing the number of magnetic bodies and Y capacitors. This will make the filtering device very large and occupy too much internal space of the controller. This application adopts a multi-turn winding copper busbar structure design, which can achieve the corresponding filtering effect without superimposing the order of magnetic bodies and Y capacitors, greatly reducing the size and material cost of the EMC device.
[0024] 5. The designed EMC device has high scalability. A series of corresponding filtering structures can be expanded by adjusting the number of turns of the multi-turn copper bar coil to meet different levels of electromagnetic compatibility requirements. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 It is a structural schematic diagram of the present invention;
[0026] Figure 2 It is an explosion schematic diagram of the present invention;
[0027] Figure 3 It is a schematic diagram of a P-pole flat winding assembly and an N-pole flat winding assembly;
[0028] Figure 4 It is a schematic diagram of the structure of a multi-turn copper bar coil;
[0029] Figure 5 It is a schematic diagram of the structure of a magnetic body;
[0030] Figure 6 is a schematic diagram of the structure of the base;
[0031] Wherein: 1. upper cover plate, 2. P-pole flat winding assembly, 3. N-pole flat winding assembly, 4. magnetic body, 5. clamping strip, 6. first-order grounding capacitor, 7. second-order grounding capacitor, 8. first-order grounding plate, 9. second-order grounding plate, 10. base, 2-1. P-pole input terminal, 2-2. first multi-turn copper bar coil, 2-3. P-pole output terminal, 3-1. N-pole input terminal, 3-2. second multi-turn copper bar coil, 3-3. N-pole output terminal, 4-1. first magnetic ring, 4-2. second magnetic ring, 10-1. magnetic body mounting cavity. DETAILED DESCRIPTION
[0032] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.
[0033] An EMC device that can increase the inductance, such as Figure 1 and Figure 2 As shown, it includes an upper cover plate 1, a P-pole flat winding assembly 2, an N-pole flat winding assembly 3, a magnetic body 4 and a base 10. The P-pole flat winding assembly 2, the N-pole flat winding assembly 3 and the magnetic body 4 are all arranged on the base 10. The upper cover plate 1 is connected to the base 10 and an inner cavity for accommodating the P-pole flat winding assembly 2, the N-pole flat winding assembly 3 and the magnetic body 4 is formed between the upper cover plate 1 and the base 10. Figure 3 As shown, the P-pole flat winding assembly 2 includes a first multi-turn copper bar coil 2-2, and a P-pole input terminal 2-1 and a P-pole output terminal 2-3 respectively arranged at both ends of the first multi-turn copper bar coil 2-2, and the N-pole flat winding assembly 3 includes a second multi-turn copper bar coil 3-2, and an N-pole input terminal 3-1 and an N-pole output terminal 3-3 respectively arranged at both ends of the second multi-turn copper bar coil 3-2, and the magnetic body 4 is set through the first multi-turn copper bar coil 2-2 and the second multi-turn copper bar coil 3-2 at the same time.
[0034] The P-pole flat winding assembly 2 and the N-pole flat winding assembly 3 both adopt a multi-turn copper bar coil design. The magnetic body passes through the multi-turn copper bar coil insulated by enameled wire, which is equivalent to the effect of a single-turn copper bar passing through multiple magnetic bodies, increasing the impedance and inductance. Under the same working conditions and size, it can greatly improve the filtering effect of the EMC device. Compared with the existing controller filters, which are composed of a combination of magnetic bodies and copper bars, a single turn of the copper bar passes through the magnetic body, and the inductance on the magnetic body is small. In order to achieve an ideal filtering effect, a multi-order filtering topology must be adopted, that is, a structural layout method of adding multiple groups of magnetic bodies plus Y capacitors, which also greatly reduces the volume of the entire device.
[0035] Specifically, the surfaces of the first multi-turn copper bar coil 2-2 and the second multi-turn copper bar coil 3-2 are both provided with insulating paint, so that insulation can be achieved. The above-mentioned input and output terminals are electrically connected to the multi-turn copper bar coils by bolts.
[0036] like Figure 5 As shown, the magnetic body 4 includes a first magnetic ring 4-1 and a second magnetic ring 4-2. The first magnetic ring 4-1 and the second magnetic ring 4-2 are both designed to be spliced with two U-shaped blocks, so as to facilitate assembly.
[0037] The first magnetic ring 4-1 passes through the first multi-turn copper bar coil 2-2 and the second multi-turn copper bar coil 3-2 and wraps the first side of the first multi-turn copper bar coil 2-2 and the second multi-turn copper bar coil 3-2. Similarly, the second magnetic ring 4-2 passes through the first multi-turn copper bar coil 2-2 and the second multi-turn copper bar coil 3-2 and wraps the second side of the first multi-turn copper bar coil 2-2 and the second multi-turn copper bar coil 3-2. The first side and the second side are arranged opposite to each other.
[0038] The first magnetic ring 4-1 and the second magnetic ring 4-2 both wrap the P-pole flat winding assembly 2 and the N-pole flat winding assembly 3 therein, and the two sides of the wrapping are arranged opposite to each other. Combined with the winding shape of the coil body being a rounded square, the gap can be reduced, thereby reducing the volume.
[0039] The first multi-turn copper bar coil 2 - 2 and the second multi-turn copper bar coil 3 - 2 have the same number of turns.
[0040] like Figure 4As shown, the first multi-turn copper bar coil 2-2 and the second multi-turn copper bar coil 3-2 both include a coil body and a first lead-out section and a second lead-out section arranged at both ends of the coil body. The lead-out section is laser stripped to facilitate connection with the input terminal and the output terminal. The first lead-out section and the second lead-out section of the first multi-turn copper bar coil 2-2 and the second multi-turn copper bar coil 3-2 are respectively located on both sides of the magnetic body 4. In this way, the space utilization rate can be improved by staggered arrangement, thereby reducing the volume. In some embodiments, the first lead-out section and the second lead-out section at both ends of the multi-turn copper bar coil are on a straight line. At this time, the first lead-out sections of the two multi-turn copper bar coils are located on one side of the magnetic body 4, and the second lead-out sections of the two multi-turn copper bar coils are located on the other side of the magnetic body 4; of course, in other embodiments, a staggered arrangement can also be adopted to form a centrally symmetrical arrangement.
[0041] like Figure 6 As shown, a magnetic body installation cavity 10-1 is provided in the base 10, and the first multi-turn copper bar coil 2-2 and the second multi-turn copper bar coil 3-2 are placed in the magnetic body installation cavity 10-1 after passing through the winding copper bar, and a small amount of epoxy glue is filled in the magnetic body installation cavity 10-1.
[0042] The device also includes a compression strip 5, which is fixed to the side wall of the base 10 and is used to compress the first-order magnetic body 4-1 and the second-order magnetic body 4-2.
[0043] The device also includes a first-order grounding capacitor 6, a secondary-order grounding capacitor 7, a first-order grounding plate 8 and a secondary-order grounding plate 9. The P-pole flat winding assembly 2 is respectively connected to the first-order grounding capacitor 6 and the first-order grounding plate 8, and the N-pole flat winding assembly 3 is respectively connected to the secondary-order grounding capacitor 7 and the secondary-order grounding plate 9.
[0044] The first-order grounding capacitor 6 , the second-order grounding capacitor 7 , the first-order grounding plate 8 and the second-order grounding plate 9 are all arranged on the base 10 .
[0045] The assembly process of the above device is as follows:
[0046] First, the copper bar is bent twice by a bending mold to obtain a first multi-turn copper bar coil 2-2 and a second multi-turn copper bar coil 3-2; then the first multi-turn copper bar coil 2-2 and the second multi-turn copper bar coil 3-2 are insulated by varnish immersion as a whole, and then the two ends of the multi-turn copper bar coil are laser stripped.
[0047] The P-pole input terminal 2-1, the first multi-turn copper bar coil 2-2 and the P-pole output terminal 2-3 are fixedly connected by bolts; the N-pole input terminal 3-1, the second multi-turn copper bar coil 3-2 and the N-pole output terminal 3-3 are fixedly connected by bolts;
[0048] The first-order grounding capacitor 6, the second-order grounding capacitor 7, the first-order grounding plate 8 and the second-order grounding plate 9 are installed and fixed in the corresponding installation grooves of the base 10;
[0049] After the magnetic body 4 is installed on the base 10 through the P-pole flat winding assembly 2 and the N-pole flat winding assembly 3, a small amount of epoxy glue is poured into the magnetic body installation cavity 10-1;
[0050] The pins of the first-order grounding capacitor 6 and the second-order grounding capacitor 7 are respectively connected to the pins of the P-pole flat winding assembly 2, the N-pole flat winding assembly 3, the first-order grounding plate 8 and the second-order grounding plate 9 by soldering;
[0051] The compression strip 5 is fixed to the side wall of the base 10 to compress the first-stage magnetic body 4-1 and the second-stage magnetic body 4-2;
[0052] The upper cover plate 1 is fixed on the base 10 to insulate and protect the copper busbar; at this point, the EMC device is assembled.
Claims
1. An EMC device capable of increasing inductance, comprising an upper cover plate (1), a P-pole flat winding assembly (2), an N-pole flat winding assembly (3), a magnetic body (4) and a base (10), wherein the P-pole flat winding assembly (2), the N-pole flat winding assembly (3) and the magnetic body (4) are all arranged on the base (10), and the upper cover plate (1) is connected to the base (10) and forms an inner cavity for accommodating the P-pole flat winding assembly (2), the N-pole flat winding assembly (3) and the magnetic body (4) between the upper cover plate (1) and the base (10), characterized in that: The P-pole flat winding assembly (2) comprises a first multi-turn copper bar coil (2-2), and a P-pole input terminal (2-1) and a P-pole output terminal (2-3) respectively arranged at two ends of the first multi-turn copper bar coil (2-2); the N-pole flat winding assembly (3) comprises a second multi-turn copper bar coil (3-2), and an N-pole input terminal (3-1) and an N-pole output terminal (3-3) respectively arranged at two ends of the second multi-turn copper bar coil (3-2); and the magnetic body (4) is arranged to pass through the first multi-turn copper bar coil (2-2) and the second multi-turn copper bar coil (3-2) at the same time.
2. The EMC device capable of increasing inductance according to claim 1, characterized in that: The surfaces of the first multi-turn copper bar coil (2-2) and the second multi-turn copper bar coil (3-2) are both provided with insulating paint.
3. The EMC device capable of increasing inductance according to claim 1, characterized in that: The magnetic body (4) comprises a first magnetic ring (4-1) and a second magnetic ring (4-2), wherein the first magnetic ring (4-1) passes through the first multi-turn copper bar coil (2-2) and the second multi-turn copper bar coil (3-2) and wraps the first side of the first multi-turn copper bar coil (2-2) and the second multi-turn copper bar coil (3-2). The second magnetic ring (4-2) passes through the first multi-turn copper bar coil (2-2) and the second multi-turn copper bar coil (3-2) and wraps the second side edges of the first multi-turn copper bar coil (2-2) and the second multi-turn copper bar coil (3-2). The first side edge and the second side edge are arranged opposite to each other.
4. The EMC device capable of increasing inductance according to claim 1, characterized in that: The first multi-turn copper bar coil (2-2) and the second multi-turn copper bar coil (3-2) have the same number of turns.
5. The EMC device capable of increasing inductance according to claim 1, characterized in that: The first multi-turn copper bar coil (2-2) and the second multi-turn copper bar coil (3-2) both comprise a coil body and a first lead-out section and a second lead-out section provided at two ends of the coil body. The first lead-out section and the second lead-out section of the first multi-turn copper bar coil (2-2) and the second multi-turn copper bar coil (3-2) are respectively located on both sides of the magnetic body (4).
6. The EMC device capable of increasing inductance according to claim 5, characterized in that: The winding shape of the coil body is a rounded square.
7. The EMC device capable of increasing inductance according to claim 1, characterized in that: A magnetic body installation cavity (10-1) is provided in the base (10), and the first multi-turn copper bar coil (2-2) and the second multi-turn copper bar coil (3-2) are placed in the magnetic body installation cavity (10-1) after passing through the winding copper bar.
8. The EMC device capable of increasing inductance according to claim 1, characterized in that: The device also includes a compression strip (5), which is fixed to the side wall of the base (10) and is used to compress the first-stage magnetic body (4-1) and the second-stage magnetic body (4-2).
9. The EMC device capable of increasing inductance according to claim 1, characterized in that: The device also includes a first-order grounding capacitor (6), a secondary-order grounding capacitor (7), a first-order grounding plate (8) and a secondary-order grounding plate (9); the P-pole flat winding assembly (2) is respectively connected to the first-order grounding capacitor (6) and the first-order grounding plate (8); and the N-pole flat winding assembly (3) is respectively connected to the secondary-order grounding capacitor (7) and the secondary-order grounding plate (9).
10. The EMC device capable of increasing inductance according to claim 9, characterized in that: The first-order grounding capacitor (6), the second-order grounding capacitor (7), the first-order grounding plate (8) and the second-order grounding plate (9) are all arranged on a base (10).