Capacitor filtering assembly integrated with high inductance and control method thereof

Abstract

The invention relates to the technical field of capacitor filtering, in particular to a capacitor filtering assembly integrated with high inductance and a control method thereof, and the assembly comprises a magnetic ring, an anode channel, a cathode channel and an isolation plate. The magnetic ring comprises a first ring section, a second ring section, a third ring section and a fourth ring section, the positive electrode channels start from the inner surface of the magnetic ring of the second ring section and are wound anticlockwise at equal intervals along the second ring section, and the positive electrode channels stop from the outer surface of the magnetic ring of the second ring section and are wound anticlockwise at equal intervals along the second ring section. The negative channel starts from the inner surface of the magnetic ring of the fourth ring section and is wound clockwise at equal intervals along the fourth ring section, the positive channel stops on the outer surface of the magnetic ring of the fourth ring section, and the isolation plate is arranged along the center of the first ring section and the center of the third ring section; the anode channel and the cathode channel are made of copper and have rectangular sections, and the surfaces of the anode channel and the cathode channel are coated with insulating materials, so that the filtering effect is improved, and the stability of the assembly is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of capacitive filtering, and particularly to an integrated capacitive filtering component with high inductance and its control method. Background Art

[0002] In current automotive capacitors, to meet the requirements of different working environments, it is necessary to integrate filtering components to achieve the required inductance. With the continuous development of technology and the continuous upgrading of technology, the requirements for inductance are also getting higher and higher, and even capacitor designs directly connected to the capacitor body have emerged. Therefore, according to the increasingly demanding inductance design, it is necessary to gradually optimize and improve the relevant filtering component design to achieve the effect of automotive capacitors with high inductance required by users.

[0003] Chinese Patent Application Publication No.: CN115188586A discloses a filtering capacitor for a new energy vehicle controller, which includes a filtering capacitor inner core group, a capacitor encapsulation housing, an upper electrode conductive heat sink, a lower electrode conductive heat sink, and conductive positioning bolts. The conductive positioning bolts include an upper conductive positioning bolt and a lower conductive positioning bolt. The upper electrode conductive heat sink and the lower electrode conductive heat sink of two U-shaped groove conductive heat dissipation bodies are oppositely closed and wrapped around the outside of the filtering capacitor inner core group, and the two end core electrode surfaces of the capacitor inner core group are respectively electrically connected to the inner bottom surfaces of the U-shaped grooves at the bottoms of the upper electrode conductive heat sink and the lower electrode conductive heat sink. The lead connection hole positions on the electrode conductive lead-out sheets provided on the upper and lower electrode conductive heat sinks are respectively aligned and positioned with the bolt holes of the upper conductive positioning bolt and the lower conductive positioning bolt. However, the following problems exist in the prior art: The positive and negative copper bars directly pass through the center of the magnetic ring, and the magnetic field generated by the current on the copper bar will generate a mutual inductance effect with the magnetic ring, and this mutual inductance effect may exacerbate the electromagnetic interference of the system and affect the stability of the power supply and the filtering effect. Summary of the Invention

[0004] Therefore, the present invention provides an integrated capacitive filtering component with high inductance and its control method to overcome the problem in the prior art that the direct passing of the copper bar through the center of the magnetic ring affects the stability of the power supply and the filtering effect.

[0005] To achieve the above object, on the one hand, the present invention provides an integrated capacitive filtering component with high inductance, including: a magnetic ring, a positive electrode channel, a negative electrode channel, and a separator plate; The magnetic ring includes a first ring segment, a second ring segment, a third ring segment, and a fourth ring segment. The positive electrode channel starts from the inner surface of the magnetic ring of the second ring segment and winds counterclockwise at equal intervals along the second ring segment. The positive electrode channel ends at the outer surface of the magnetic ring of the second ring segment. The negative electrode channel starts from the inner surface of the magnetic ring of the fourth ring segment and winds clockwise at equal intervals along the fourth ring segment. The positive electrode channel ends at the outer surface of the magnetic ring of the fourth ring segment. The partition plate is arranged along the centers of the first ring segment and the third ring segment; The positive electrode channel and the negative electrode channel are made of copper and have a rectangular cross-section. The surfaces of the positive electrode channel and the negative electrode channel are coated with an insulating material.

[0006] Further, it further includes a positive electrode access terminal and a negative electrode access terminal. The positive electrode access terminal is connected to the starting end of the positive electrode channel, and the negative electrode access terminal is connected to the starting end of the negative electrode channel.

[0007] Further, it further includes a positive electrode output terminal and a negative electrode output terminal. The positive electrode output terminal is connected to the terminating end of the positive electrode channel, and the negative electrode output terminal is connected to the terminating end of the negative electrode channel. Among them, the positive electrode output terminal is L-shaped, the negative electrode output terminal is J-shaped, and connection holes are provided at one end of the positive electrode output terminal and the negative electrode output terminal away from the magnetic ring.

[0008] On the other hand, the present invention provides a control method for an integrated high-inductance capacitive filter component, including: The on-current passes through the positive electrode channel and the negative electrode channel respectively and forms a magnetic field around the magnetic ring; Use an oscilloscope to monitor the frequency information of the output electrical signal and obtain the frequency response coefficient through calculation; Determine whether the filtering effect of the capacitive filter component meets the preset standard according to the frequency response coefficient. Under the condition that it does not meet the preset standard, re-determine whether the filtering effect meets the preset standard according to the inductance value, or determine the reason for not meeting the preset standard according to the heating rate under the preset processing duration; Complete the filtering process based on the condition that the filtering effect meets the preset standard.

[0009] Further, the frequency response coefficient is jointly determined by the signal frequency and the signal amplitude.

[0010] Further, the process of determining that the filtering effect of the capacitive filter component does not meet the preset standard according to the frequency response coefficient includes, If the frequency response coefficient is greater than or equal to the first preset response coefficient, it is determined that the filtering effect of the capacitive filter component does not meet the preset standard, and, If the frequency response coefficient is greater than or equal to the first preset response coefficient and less than the second preset response coefficient, then the filtering effect is determined again according to the inductance value to see if it meets the preset standard; If the frequency response coefficient is greater than or equal to the second preset response coefficient, then the reason for not meeting the preset standard is determined according to the heating rate under the preset processing duration.

[0011] Furthermore, under the condition that the inductance value is less than the preset inductance value, it is determined again that the filtering effect does not meet the preset standard, and the winding density of the positive electrode channel and the negative electrode channel is increased according to the difference between the preset inductance value and the inductance value.

[0012] Furthermore, under the condition that the inductance value is greater than or equal to the preset inductance value, it is determined again that the filtering effect meets the preset standard, and the filtering process is continued according to the current working conditions.

[0013] Furthermore, based on the condition that the heating rate is less than the preset heating rate, it is determined that the reason for the filtering effect not meeting the preset standard is that the heat dissipation area of the positive electrode channel and the negative electrode channel is insufficient, and the aspect ratio of the cross-section of the positive electrode channel and the negative electrode channel is adjusted according to the difference between the heating rate and the preset heating rate.

[0014] Furthermore, based on the condition that the heating rate is greater than or equal to the preset heating rate, it is determined that the reason for the filtering effect not meeting the preset standard is that the capacitor filtering component is overloaded, and the cross-sectional areas of the positive electrode channel and the negative electrode channel are adjusted according to the input current value.

[0015] Compared with the prior art, the beneficial effect of the present invention is that by winding the positive electrode channel and the negative electrode channel around the magnetic ring to form an inductor, it can provide a large inductance value, effectively filter out high-frequency noise and interference signals in the power supply, and provide a clean power supply or signal.

[0016] Furthermore, the positive electrode channel and the negative electrode channel are made of copper and have a rectangular cross-section. Compared with traditional thin copper wires, they have a larger cross-sectional area. Therefore, when conducting the same current, the rectangular channels have a lower resistance, which helps to reduce overheating and improve the working efficiency and stability of the components.

[0017] Furthermore, due to the lower resistance of the positive electrode channel and the negative electrode channel, they can effectively reduce energy loss at higher currents, improve the efficiency of the overall circuit, and improve the long-term stability and reliability of the system.

[0018] Further, the present invention determines whether the filtering effect of the capacitive filtering component meets a preset standard according to the frequency response coefficient, and secondarily determines whether the filtering effect meets the preset standard according to the inductance value under the condition that the preset standard is not met, thereby improving the accuracy and reliability of the determination through a dual determination mechanism.

[0019] Further, by determining the reasons for not meeting the preset standard and having different adjustment schemes for different reasons, the present invention can timely detect and process components with poor filtering effects, effectively avoid system fluctuations or failures caused by poor filtering, realize flexible control of the capacitive filtering component, improve the efficiency of problem-solving, and thus enhance the stability of the entire electronic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of an integrated capacitive filtering component with a high inductance according to an embodiment of the present invention; Figure 2 is a flowchart of a control method for an integrated capacitive filtering component with a high inductance according to an embodiment of the present invention; Figure 3 is a flowchart of determining whether the filtering effect of a capacitive filtering component meets a preset standard according to an embodiment of the present invention; Figure 4 is a flowchart of determining the reasons for the filtering effect not meeting the preset standard according to an embodiment of the present invention; In the figure: 1, magnetic ring; 11, first ring segment; 12, second ring segment; 13, third ring segment; 14, fourth ring segment; 2, positive electrode channel; 21, positive electrode access terminal; 22, positive electrode output terminal; 3, negative electrode channel; 31, negative electrode access terminal; 32, negative electrode output terminal; 4, isolation plate; 5, connection hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to make the objectives and advantages of the present invention clearer, the present invention will be further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and do not limit the protection scope of the present invention.

[0023] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0024] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral 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, and it can be the communication inside two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Please refer to Figures 1 to 4 as shown, which are respectively the structural schematic diagram of the integrated high-inductance capacitive filter component in the embodiment of the present invention; the flowchart of the control method of the integrated high-inductance capacitive filter component in the embodiment of the present invention; the flowchart of determining whether the filtering effect of the capacitive filter component meets the preset standard in the embodiment of the present invention; the flowchart of determining the reason why the filtering effect does not meet the preset standard in the embodiment of the present invention.

[0026] The integrated high-inductance capacitive filter component in the embodiment of the present invention includes: a magnetic ring 1, a positive channel 2, a negative channel 3, and a separator 4; The magnetic ring 1 includes a first ring segment 11, a second ring segment 12, a third ring segment 13, and a fourth ring segment 14. The positive channel 2 starts from the inner surface of the magnetic ring 1 of the second ring segment 12 and is wound counterclockwise at equal intervals along the second ring segment 12. The positive channel 2 ends at the outer surface of the magnetic ring 1 of the second ring segment 12. The negative channel 3 starts from the inner surface of the magnetic ring 1 of the fourth ring segment 14 and is wound clockwise at equal intervals along the fourth ring segment 14. The positive channel 2 ends at the outer surface of the magnetic ring 1 of the fourth ring segment 14. The separator 4 is arranged along the centers of the first ring segment 11 and the third ring segment 13; The positive channel 2 and the negative channel 3 are made of copper and have a rectangular cross-section, and the surfaces of the positive channel 2 and the negative channel 3 are coated with an insulating material.

[0027] Specifically, the aspect ratio of the length to the width of the cross-section of the positive channel 2 and the negative channel 3 is, for example, 3:2, and the cross-sectional area is, for example, 600 mm 2 , which is not specifically limited, and those skilled in the art can adjust it according to the actual situation.

[0028] In the embodiment of the present invention, the insulating material is epoxy resin.

[0029] Specifically, it further includes a positive access terminal 21 and a negative access terminal 31. The positive access terminal 21 is connected to the starting end of the positive channel 2, and the negative access terminal 31 is connected to the starting end of the negative channel 3.

[0030] Specifically, it further includes a positive output terminal 22 and a negative output terminal 32. The positive output terminal 22 is connected to the termination end of the positive channel 2, and the negative output terminal 32 is connected to the termination end of the negative channel 3. Among them, the positive output terminal 22 is L-shaped, the negative output terminal 32 is J-shaped, and connection holes 5 are provided at one end of the positive output terminal 22 and the negative output terminal 32 away from the magnetic ring 1.

[0031] The control method of the integrated high-inductance capacitor filter component in the embodiment of the present invention includes: The on-current respectively passes through the positive channel 2 and the negative channel 3 and forms a magnetic field around the magnetic ring 1; Use an oscilloscope to monitor the frequency information of the output electrical signal and obtain the frequency response coefficient through calculation; Determine whether the filtering effect of the capacitor filter component meets the preset standard according to the frequency response coefficient. Under the condition that it does not meet the preset standard, determine whether the filtering effect meets the preset standard according to the inductance value for the second time, or determine the reason for not meeting the preset standard according to the heating rate under the preset processing duration; Complete the filtering process based on the condition that the filtering effect meets the preset standard.

[0032] Specifically, use an oscilloscope to monitor the frequency information of the output electrical signal within a preset duration of 5 minutes.

[0033] Specifically, the frequency response coefficient is jointly determined by the signal frequency and the signal amplitude and is calculated by the following formula: , in the formula, G is the frequency response coefficient, λ is the first evaluation coefficient, λ is set to 0.52, f is the signal frequency, f 0 is the signal frequency threshold, f 0 is set to 50 Hz, P(f) is the power spectral density function, μ is the second evaluation coefficient, μ is set to 0.47, V is the signal amplitude, k is the number of times the signal amplitude appears, V 0 is the signal amplitude threshold, V 0 is set to 5 dB.

[0034] Specifically, the power spectral density function and the number of times the signal amplitude appears are obtained through oscilloscope detection.

[0035] Specifically, determine whether the filtering effect of the capacitor filter component meets the preset standard according to the frequency response coefficient. Among them, if the frequency response coefficient is less than the first preset response coefficient 0.75, it is determined that the filtering effect of the capacitor filter component meets the preset standard, and the filtering process continues to be completed; If the frequency response coefficient is greater than or equal to the first preset response coefficient and less than the second preset response coefficient of 0.83, it is determined that the filtering effect of the capacitive filtering component does not meet the preset standard, and the filtering effect is re-determined according to the inductance value to check whether it meets the preset standard; If the frequency response coefficient is greater than or equal to the second preset response coefficient, it is determined that the filtering effect of the capacitive filtering component does not meet the preset standard, and the reason for not meeting the preset standard is determined according to the heating rate under the preset processing duration.

[0036] In the embodiments of the present invention, the value of the first preset response coefficient is 0.75, and the value of the second preset response coefficient is 0.83. However, the above values are not limited thereto, and those skilled in the art can also adjust the values according to actual needs.

[0037] Specifically, under the condition that the inductance value is less than the preset inductance value of 80 μH, it is re-determined that the filtering effect does not meet the preset standard, and the winding density of the positive channel 2 and the negative channel 3 is increased according to the difference between the preset inductance value and the inductance value.

[0038] Specifically, under the condition that the inductance value is greater than or equal to the preset inductance value, it is re-determined that the filtering effect meets the preset standard, and the filtering process is continued according to the current working conditions.

[0039] In the embodiments of the present invention, the value of the preset inductance value is 80 μH. However, the above values are not limited thereto, and those skilled in the art can also adjust the values according to actual needs.

[0040] Specifically, the inductance value is measured by an LCR meter.

[0041] Specifically, the reason for the filtering effect not meeting the preset standard is determined according to the heating rate under the preset processing duration of 10 min. Based on the condition that the heating rate is less than the preset heating rate of 0.5 °C / min, it is determined that the reason for the filtering effect not meeting the preset standard is the insufficient heat dissipation area of the positive channel 2 and the negative channel 3, and the aspect ratio of the cross-section of the positive channel 2 and the negative channel 3 is adjusted according to the difference between the heating rate and the preset heating rate.

[0042] Specifically, the heating rate is calculated by monitoring with a temperature sensor.

[0043] In the embodiments of the present invention, the value of the preset heating rate is 0.5 °C / min. However, the above values are not limited thereto, and those skilled in the art can also adjust the values according to actual needs.

[0044] Specifically, the aspect ratio of the cross-section of the positive electrode channel 2 and the negative electrode channel 3 is adjusted according to the difference in the heating rate. Among them, if the difference in the heating rate is less than the preset heating rate difference of 0.1, the aspect ratio of the cross-section of the positive electrode channel 2 and the negative electrode channel 3 is adjusted to the corresponding value using the first proportional adjustment coefficient of 1.02; If the difference in the heating rate is greater than or equal to the preset heating rate difference, the aspect ratio of the cross-section of the positive electrode channel 2 and the negative electrode channel 3 is adjusted to the corresponding value using the second proportional adjustment coefficient of 1.05; The difference in the heating rate is the difference between the heating rate and the preset heating rate.

[0045] Specifically, based on the condition that the heating rate is greater than or equal to the preset heating rate, it is determined that the reason for the filtering effect not meeting the preset standard is that the capacitor filtering component is overloaded, and the cross-sectional areas of the positive electrode channel 2 and the negative electrode channel 3 are adjusted according to the input current value.

[0046] Specifically, the cross-sectional areas of the positive electrode channel 2 and the negative electrode channel 3 are adjusted according to the input current value. Among them, if the input current value is less than the preset current value of 1000 A, the cross-sectional areas of the positive electrode channel 2 and the negative electrode channel 3 are adjusted to the corresponding value using the first area adjustment coefficient of 1.01; if the input current value is greater than or equal to the preset current value, the cross-sectional areas of the positive electrode channel 2 and the negative electrode channel 3 are adjusted to the corresponding value using the second area adjustment coefficient of 1.03.

[0047] Specifically, the input current value is measured by an ammeter.

[0048] In the embodiment of the present invention, the preset current value is taken as 1000 A, but the above value is not limited thereto, and those skilled in the art can also adjust this value according to actual needs.

[0049] So far, the technical solution of the present invention has been described in combination with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

[0050] The above are only the preferred embodiments of the present invention and are not used to limit the present invention; for those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A capacitor filter component with integrated high inductance, characterized in that: include: Magnetic ring, positive channel, negative channel and isolation plate; The magnetic ring includes a first ring segment, a second ring segment, a third ring segment and a fourth ring segment, the positive electrode channel starts from the inner surface of the magnetic ring of the second ring segment and is wound counterclockwise at equal intervals along the second ring segment, the positive electrode channel ends at the outer surface of the magnetic ring of the second ring segment, the negative electrode channel starts from the inner surface of the magnetic ring of the fourth ring segment and is wound clockwise at equal intervals along the fourth ring segment, the positive electrode channel ends at the outer surface of the magnetic ring of the fourth ring segment, and the isolation plate is arranged along the center of the first ring segment and the center of the third ring segment; The positive electrode channel and the negative electrode channel are made of copper and have a rectangular cross-section. The surfaces of the positive electrode channel and the negative electrode channel are coated with insulating material.

2. The integrated high-inductance capacitor filter component according to claim 1, characterized in that: It also includes a positive electrode access terminal and a negative electrode access terminal, wherein the positive electrode access terminal is connected to the starting end of the positive electrode channel, and the negative electrode access terminal is connected to the starting end of the negative electrode channel.

3. The integrated high-inductance capacitor filter component according to claim 1, characterized in that: It also includes a positive electrode connection terminal and a negative electrode connection terminal, the positive electrode connection terminal is connected to the terminal end of the positive electrode channel, and the negative electrode connection terminal is connected to the terminal end of the negative electrode channel, wherein the positive electrode connection terminal is L-shaped, and the negative electrode connection terminal is J-shaped, and the positive electrode connection terminal and the negative electrode connection terminal are both provided with connection holes at the end away from the magnetic ring.

4. A control method for an integrated high-inductance capacitor filter component, applied to the integrated high-inductance capacitor filter component according to any one of claims 1 to 3, characterized in that: include: Turn on the current to pass through the positive channel and the negative channel respectively and form a magnetic field around the magnetic ring; Use an oscilloscope to monitor the frequency information of the output electrical signal and obtain the frequency response coefficient through calculation; Determine whether the filtering effect of the capacitor filter component meets the preset standard according to the frequency response coefficient, and if it does not meet the preset standard, determine whether the filtering effect meets the preset standard according to the inductance value for a second time, or determine the reason for not meeting the preset standard according to the heating rate under the preset processing time; The filtering process is completed based on the condition that the filtering effect meets the preset standard.

5. The control method of the integrated high-inductance capacitor filter component according to claim 4, characterized in that: The frequency response coefficient is determined by the signal frequency and the signal amplitude.

6. The control method of the integrated high-inductance capacitor filter component according to claim 5, characterized in that: The process of determining whether the filtering effect of the capacitor filter component does not meet the preset standard according to the frequency response coefficient includes: If the frequency response coefficient is greater than or equal to a first preset response coefficient, it is determined that the filtering effect of the capacitor filter component does not meet the preset standard, and, If the frequency response coefficient is greater than or equal to the first preset response coefficient and less than the second preset response coefficient, secondarily determining whether the filtering effect meets the preset standard according to the inductance value; If the frequency response coefficient is greater than or equal to the second preset response coefficient, the reason for not meeting the preset standard is determined according to the heating rate under the preset processing time.

7. The control method of the integrated high-inductance capacitor filter component according to claim 6, characterized in that: Under the condition that the inductance value is less than the preset inductance value, it is secondarily determined that the filtering effect does not meet the preset standard, and the winding density of the positive electrode channel and the negative electrode channel is increased according to the difference between the preset inductance value and the inductance value.

8. The control method of the integrated high-inductance capacitor filter component according to claim 7, characterized in that: Under the condition that the inductance value is greater than or equal to the preset inductance value, it is secondarily determined that the filtering effect meets the preset standard, and the filtering process is continued according to the current working conditions.

9. The control method of the integrated high-inductance capacitor filter component according to claim 8, characterized in that: Based on the condition that the heating rate is less than the preset heating rate, it is determined that the reason why the filtering effect does not meet the preset standard is that the heat dissipation area of ​​the positive channel and the negative channel is insufficient, and the cross-sectional aspect ratio of the positive channel and the negative channel is adjusted according to the difference between the heating rate and the preset heating rate.

10. The control method of the integrated high-inductance capacitor filter component according to claim 9, characterized in that: Based on the condition that the heating rate is greater than or equal to the preset heating rate, it is determined that the reason why the filtering effect does not meet the preset standard is that the capacitor filter component is overloaded, and the cross-sectional areas of the positive channel and the negative channel are adjusted according to the input current value.

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