CN111953205A - High-power filtering protection device and frame type filtering structure - Google Patents
High-power filtering protection device and frame type filtering structure Download PDFInfo
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- CN111953205A CN111953205A CN202010719424.9A CN202010719424A CN111953205A CN 111953205 A CN111953205 A CN 111953205A CN 202010719424 A CN202010719424 A CN 202010719424A CN 111953205 A CN111953205 A CN 111953205A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/157—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators with digital control
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
Abstract
The invention discloses a high-power filter protection device and a frame-type filter structure, which comprise a front-stage filter circuit and a rear-stage protection circuit, wherein the protection circuit comprises NMOS (N-channel metal oxide semiconductor) tubes Q1 and Q2 and a control chip U1; the drain of Q1 is connected with the positive pole of the input terminal, the gate is connected with the HGATE terminal of U1 through R4, the SOURCE of Q1 and the SOURCE of Q2 are connected with the SOURCE terminal of U1; the gate of Q2 is connected to the DGATE terminal of U1, and the drain of Q2 is connected to the SENSE terminal of U1; the SOURCE end of U1 is respectively connected with the positive electrodes of D1 and D2, and the negative electrodes of D1 and D2 are respectively connected with the HGATE end and the DGATE end of U1; the SENSE terminal of U1 is connected to the OUT terminal through R5; the UV end of U1 is connected with the positive electrode of the input end through R1, the OV end is connected with the negative electrode of the output end through R3, and the UV end is connected with the OV end through R2; the FB terminal of the U1 is grounded through R6 and connected to the OUT terminal through R7; the GND end of the U1 is connected with the cathode of the output end, and the TMR end is connected with the cathode of the output end through a capacitor C7. The invention can meet the requirement of circuit safety protection and effectively improve the electromagnetic compatibility of equipment.
Description
Technical Field
The invention belongs to the technical field of integrated circuits, and particularly relates to a high-power filtering protection device and a frame type filtering structure.
Background
In the working process of an automobile electrical system, when load current, voltage and a magnetic field in equipment change, high-frequency interference signals are easily generated, and the high-frequency interference signals are easily conducted through a power line, so that the high-frequency interference signals cause large interference to rear-end equipment such as communication radars and the like, and can cause adverse effects on the performance of vehicle-mounted equipment. In addition, when the power supply is switched on and switched off and fluctuates, surge voltage, overcurrent, overvoltage, undervoltage and other situations are easy to generate, and therefore, the rear-end equipment is likely to be damaged.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a high-power filtering protection device and a frame type filtering structure which can meet the requirement of circuit safety protection and effectively improve electromagnetic compatibility.
In one aspect of the invention, the high-power filter protection device comprises a filter circuit at a front stage and a protection circuit at a rear stage, wherein the protection circuit comprises a first NMOS transistor Q1, a second NMOS transistor Q2 and a control chip U1, and the control chip U1 is LTC 4364-2; the VCC end of the control chip U1 is connected to the positive electrode of the input end of the protection circuit, and the OUT end of the control chip U1 is connected to the positive electrode of the output end of the protection circuit;
the drain of the first NMOS transistor Q1 is connected to the positive electrode of the input terminal, the gate of the first NMOS transistor Q1 is connected to the HGATE terminal of the control chip U1 through a fourth resistor R4, and the SOURCE of the first NMOS transistor Q1 and the SOURCE of the second NMOS transistor are connected to the SOURCE terminal of the control chip U1; the gate of the second NMOS tube is connected to the DGATE end of the control chip U1, and the drain of the second NMOS tube is connected to the SENSE end of the control chip U1;
the SOURCE end of the control chip U1 is respectively connected with the anodes of a first voltage stabilizing diode D1 and a second voltage stabilizing diode D2, and the cathodes of the first voltage stabilizing diode D1 and the second voltage stabilizing diode D2 are respectively connected with the HGATE end and the DGATE end of the control chip U1;
the HGATE end of the control chip U1 is also grounded through a capacitor C5; the SENSE end of the control chip U1 is connected to the OUT end through a current detection resistor R5; the UV end of the control chip U1 is connected with the anode of the input end through a first voltage-dividing resistor R1, the OV end is connected with the cathode of the output end through a third voltage-dividing resistor R3, and the UV end is connected with the OV end through a second voltage-dividing resistor R2; the FB terminal of the control chip U1 is grounded through a fourth voltage-dividing resistor R6 and is also connected to the OUT terminal through a fifth voltage-dividing resistor R7; and the GND end of the control chip U1 is connected with the cathode of the output end, and the TMR end is connected with the cathode of the output end through a capacitor C7.
According to an optimization scheme, the filter circuit comprises front and back common-mode inductors L1 and L2, three differential-mode capacitors CX1, CX2 and CX3, and four common-mode capacitors CY1, CY2, CY3 and CY 4. Differential mode capacitance CX1 is located common mode inductance L1 input, differential mode capacitance CX2 and common mode capacitance CY1, CY2 are located between common mode inductance L1 and L2, differential mode capacitance CX3 and common mode capacitance CY3, CY4 are located common mode inductance L2 output.
According to an optimized scheme, a front-end isolation filter circuit is further arranged between the filter circuit and an input end, the front-end isolation filter circuit comprises a first feedthrough capacitor C1 and a second feedthrough capacitor C2 which are arranged between the positive pole of a total input end and the positive pole of the input end of the filter circuit in parallel, and further comprises a third feedthrough capacitor C3 and a fourth feedthrough capacitor C4 which are arranged between the negative pole of the total input end and the negative pole of the input end of the filter circuit in parallel; the first feedthrough capacitor C1 and the third feedthrough capacitor C3 are grounded through a first ground plate, and the second feedthrough capacitor C2 and the fourth feedthrough capacitor C4 are grounded through a second ground plate.
In an optimized scheme, the rear end of the protection circuit is further provided with a feedthrough capacitor C6 for isolating the protection circuit from a total output end.
In another aspect of the present invention, a frame-type filtering structure includes any one of the above-mentioned high-power filtering protection devices, and further includes a frame, where a housing of the high-power filtering protection device is embedded in a bottom of the frame, and heat dissipation holes are formed in side surfaces of the frame; the top of the frame can be provided with a rear-end circuit board, and the output end of the high-power filtering protection device is connected with the rear-end circuit board.
Compared with the prior art, the invention has the following beneficial effects:
1. the protection circuit realizes functions such as surge protection, under-voltage and over-voltage protection, overcurrent protection, reverse connection prevention protection and the like, effectively prevents a rear-end circuit from being damaged, improves the electromagnetic compatibility of equipment, and meets the requirement of circuit safety protection;
2. the high-power filtering protection device and the rear-end circuit board are connected through the frame, and the embedded and integrated design is combined, so that the installation and the use are convenient, and the electromagnetic compatibility of the equipment environment can be further optimized.
Drawings
FIG. 1 is a schematic circuit diagram of an embodiment of a high power filter protection device according to the present invention;
fig. 2 is a schematic structural installation diagram of an embodiment of a frame filter structure according to the present invention;
1. a frame; 11. a base; 12. a side wall; 13. heat dissipation holes; 2. a high-power filter protection device; 3. a back end circuit board.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with reference to the specific drawings.
In one aspect of the present invention, a high power filter protection device, as shown in fig. 1, includes a filter circuit at a front stage and a protection circuit at a rear stage. The protection circuit comprises a first NMOS transistor Q1, a second NMOS transistor Q2 and a control chip U1, wherein the control chip U1 is LTC 4364-2; the VCC end of the control chip U1 is connected to the positive pole of the input end of the protection circuit, and the OUT end is connected to the positive pole of the output end of the protection circuit.
The drain of the first NMOS transistor Q1 is connected with the positive electrode of the input end, the gate of the first NMOS transistor Q1 is connected with the HGATE end of the control chip U1 through a resistor R4, and the SOURCE of the first NMOS transistor Q1 and the SOURCE of the second NMOS transistor are connected with the SOURCE end of the control chip U1; the gate of the second NMOS transistor is connected to the DGATE terminal of the control chip U1, and the drain of the second NMOS transistor is connected to the SENSE terminal of the control chip U1.
The SOURCE end of the control chip U1 is connected to the anodes of the first zener diode D1 and the second zener diode D2, respectively, and the cathodes of the first zener diode D1 and the second zener diode D2 are connected to the HGATE end and the DGATE end of the control chip U1, respectively.
The HGATE terminal of the control chip U1 is also connected to ground through a capacitor C5.
The SENSE terminal of the control chip U1 is connected to the OUT terminal through a current sensing resistor R5.
The UV end of the control chip U1 is connected with the anode of the input end through a first voltage-dividing resistor R1, the OV end is connected with the cathode of the output end through a third voltage-dividing resistor R3, and the UV end is connected with the OV end through a second voltage-dividing resistor R2.
The terminal FB of the control chip U1 is connected to ground through the fourth voltage-dividing resistor R6 and is also connected to the terminal OUT through the fifth voltage-dividing resistor R7.
And the GND end of the control chip U1 is connected with the cathode of the output end, and the TMR end is connected with the cathode of the output end through a capacitor C7.
The high-power filtering protection device is characterized by also comprising a shell, wherein the filtering circuit and the protection circuit are wrapped in the shell. Different cavities for installing the filter circuit and the protection circuit are arranged in the shell by utilizing the shielding partition plate between the filter circuit and the protection circuit, so that the electromagnetic shielding isolation is realized better structurally.
After the input voltage of the protection circuit is divided by a resistor voltage dividing network (composed of R1, R2 and R3 in the embodiment), the input voltage is input to an under-voltage comparator and an over-voltage comparator inside the control chip from the UV end and the OV end, and when the input voltage exceeds a set value, the control chip controls the first NMOS tube to be turned off, so that the over-voltage protection is realized; when the input voltage is lower than the set value, the control chip controls the first NMOS tube to be turned off, and the undervoltage protection is realized.
If the current passing through the current detection resistor R5 exceeds a set value, the protection circuit controls the chip to turn off the first NMOS tube, cuts off power supply and prevents the rear-end circuit from short-circuit fault and abnormal work.
If the positive electrode and the negative electrode of the power supply are reversely connected due to misoperation, the control chip of the protection circuit can control the second NMOS tube to be turned off, and the situation that the equipment is burnt down due to the fact that the positive electrode and the negative electrode of the power supply are reversely connected is avoided.
The protection circuit is provided with two voltage stabilizing diodes D1 and D2, and the voltage between the SOURCE end and the HGATE end as well as between the SOURCE end and the DGATE end is limited within a certain range (the clamping voltage is 15V in the figure 1) so as to prevent the NMOS tube from being damaged.
The TMR end of the control chip is connected with a capacitor C7 and used for setting the delay time of the first NMOS tube Q1 before the first NMOS tube Q1 is turned off due to faults. And the FB terminal of the control chip is connected with a fourth voltage-dividing resistor R6 and a fifth voltage-dividing resistor R7, and is used for controlling the output voltage not to exceed the set clamping voltage.
The control chip realizes surge control by driving an NMOS tube Q1: the control chip is used for collecting surge voltage, alarming for overvoltage and delaying to turn off, and clamp voltage output is carried out during alarming, so that the stability of output voltage during surge voltage is guaranteed; after the surge voltage is over, the voltage returns to normal, and the power supply characteristics meet the requirement of GJB181A-2003 on overvoltage surge.
In an optimized scheme, as shown in fig. 1, the filter circuit includes two front and back common-mode inductors L1 and L2, three differential-mode capacitors CX1, CX2 and CX3, and four common-mode capacitors CY1, CY2, CY3 and CY 4. Differential mode capacitance CX1 is located common mode inductance L1 input, differential mode capacitance CX2 and common mode capacitance CY1, CY2 are located between common mode inductance L1 and L2, differential mode capacitance CX3 and common mode capacitance CY3, CY4 are located common mode inductance L2 output.
The input end of the common mode inductor L1 is the input end of the filter circuit, and the output end of the common mode inductor L2 is the output end of the filter circuit. According to the scheme, the combination of the two-stage common-mode inductor and the four common-mode capacitors can effectively filter out common-mode interference from a source to a ground; the three differential mode capacitors positioned in front of, in middle of and behind the two-stage common mode inductors can effectively filter out differential mode interference between two input power lines.
According to the optimization scheme, a front-end isolation filter circuit is further arranged between the filter circuit and the input end and comprises a first feedthrough capacitor C1 and a second feedthrough capacitor C2 which are arranged between the positive pole of the total input end and the positive pole of the input end of the filter circuit in parallel, and a third feedthrough capacitor C3 and a fourth feedthrough capacitor C4 which are arranged between the negative pole of the total input end and the negative pole of the input end of the filter circuit in parallel. The first feedthrough capacitor C1 and the third feedthrough capacitor C3 are grounded through a first ground plate, and the second feedthrough capacitor C2 and the fourth feedthrough capacitor C4 are grounded through a second ground plate.
Wherein, the total input end refers to the input end of the high-power filtering protection device. The feed-through filter is arranged at the input end, so that the influence of electromagnetic interference can be obviously weakened.
In an optimized scheme, the rear end of the protection circuit is further provided with a feedthrough capacitor C6 for isolating the protection circuit from a total output end.
Wherein, the total output end refers to the output end of the high-power filtering protection device.
In another aspect of the present invention, a frame-type filtering structure includes any one of the foregoing high-power filtering protection devices 2, and further includes a frame 1, wherein a housing of the high-power filtering protection device 2 is embedded in a base 11 of the frame 1, and a side wall 12 of the frame 1 is provided with a heat dissipation hole 13; the top of the frame 1 is used for installing a protected rear-end circuit board 3, and the output end of the high-power filter protection device 2 is connected with the input end of the rear-end circuit board 3. In addition, the frame can be provided with various mounting structures, such as mounting holes for facilitating bolt fixing, and grooves for positioning and mounting are arranged on each corner at the bottom of the frame, and the side walls of the frame can be longitudinally avoided from the grooves. This facilitates the installation of the structure at the appropriate place inside the device.
The frame type filtering structure connects the high-power filtering protection device and the rear-end circuit board through the frame, and the product (namely the high-power filtering protection device) is embedded into the frame to form an integrated structure, so that the frame type filtering structure is convenient to install and use, and the electromagnetic compatibility in equipment can be further optimized.
According to the optimized scheme, the contact surface of the high-power filtering protection device and the frame is subjected to electromagnetic shielding treatment by using conductive rubber.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment, and all technical solutions belonging to the principle of the present invention belong to the protection scope of the present invention. Modifications to the disclosed embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.
Claims (6)
1. The high-power filter protection device is characterized by comprising a filter circuit at a front stage and a protection circuit at a rear stage, wherein the protection circuit comprises a first NMOS transistor Q1, a second NMOS transistor Q2 and a control chip U1, and the control chip U1 is LTC 4364-2; the VCC end of the control chip U1 is connected to the positive electrode of the input end of the protection circuit, and the OUT end of the control chip U1 is connected to the positive electrode of the output end of the protection circuit;
the drain of the first NMOS transistor Q1 is connected to the positive electrode of the input terminal, the gate of the first NMOS transistor Q1 is connected to the HGATE terminal of the control chip U1 through a fourth resistor R4, and the SOURCE of the first NMOS transistor Q1 and the SOURCE of the second NMOS transistor are connected to the SOURCE terminal of the control chip U1; the gate of the second NMOS tube is connected to the DGATE end of the control chip U1, and the drain of the second NMOS tube is connected to the SENSE end of the control chip U1;
the SOURCE end of the control chip U1 is respectively connected with the anodes of a first voltage stabilizing diode D1 and a second voltage stabilizing diode D2, and the cathodes of the first voltage stabilizing diode D1 and the second voltage stabilizing diode D2 are respectively connected with the HGATE end and the DGATE end of the control chip U1;
the HGATE end of the control chip U1 is also grounded through a capacitor C5; the SENSE end of the control chip U1 is connected to the OUT end through a current detection resistor R5; the UV end of the control chip U1 is connected with the anode of the input end through a first voltage-dividing resistor R1, the OV end is connected with the cathode of the output end through a third voltage-dividing resistor R3, and the UV end is connected with the OV end through a second voltage-dividing resistor R2; the FB terminal of the control chip U1 is grounded through a fourth voltage-dividing resistor R6 and is also connected to the OUT terminal through a fifth voltage-dividing resistor R7; and the GND end of the control chip U1 is connected with the cathode of the output end, and the TMR end is connected with the cathode of the output end through a capacitor C7.
2. The high power filter protection device according to claim 1, wherein:
the filter circuit comprises front and back common-mode inductors L1 and L2, three differential-mode capacitors CX1, CX2 and CX3, and four common-mode capacitors CY1, CY2, CY3 and CY 4. Differential mode capacitance CX1 is located common mode inductance L1 input, differential mode capacitance CX2 and common mode capacitance CY1, CY2 are located between common mode inductance L1 and L2, differential mode capacitance CX3 and common mode capacitance CY3, CY4 are located common mode inductance L2 output.
3. The high power filter protection device according to claim 1, wherein:
a front-end isolation filter circuit is further arranged between the filter circuit and the input end, and comprises a first feedthrough capacitor C1 and a second feedthrough capacitor C2 which are arranged between the positive pole of the total input end and the positive pole of the input end of the filter circuit in parallel, and further comprises a third feedthrough capacitor C3 and a fourth feedthrough capacitor C4 which are arranged between the negative pole of the total input end and the negative pole of the input end of the filter circuit in parallel; the first feedthrough capacitor C1 and the third feedthrough capacitor C3 are grounded through a first ground plate, and the second feedthrough capacitor C2 and the fourth feedthrough capacitor C4 are grounded through a second ground plate.
4. The high power filter protection device according to claim 1, wherein:
and the rear end of the protection circuit is also provided with a feedthrough capacitor C6 for isolating the protection circuit from the total output end.
5. Frame-type filter structure comprising a high power filter protection device according to any of claims 1-4, characterized in that: the high-power filtering protection device further comprises a frame, wherein a shell of the high-power filtering protection device is embedded into the bottom of the frame, and heat dissipation holes are formed in the side face of the frame; the top of the frame can be provided with a rear-end circuit board, and the output end of the high-power filtering protection device is connected with the rear-end circuit board.
6. A frame-type filtering structure according to claim 5, wherein:
the contact surface of the high-power filtering protection device and the frame is subjected to electromagnetic shielding treatment by using conductive rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010719424.9A CN111953205A (en) | 2020-07-23 | 2020-07-23 | High-power filtering protection device and frame type filtering structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010719424.9A CN111953205A (en) | 2020-07-23 | 2020-07-23 | High-power filtering protection device and frame type filtering structure |
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| Publication Number | Publication Date |
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| CN111953205A true CN111953205A (en) | 2020-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010719424.9A Pending CN111953205A (en) | 2020-07-23 | 2020-07-23 | High-power filtering protection device and frame type filtering structure |
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| CN (1) | CN111953205A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112737333A (en) * | 2020-12-28 | 2021-04-30 | 航天东方红卫星有限公司 | Secondary power supply with high conversion efficiency for satellite |
| CN113708617A (en) * | 2021-08-20 | 2021-11-26 | 北京计算机技术及应用研究所 | High-power-density DC/DC power module integrated with EMI filtering |
| CN114665560A (en) * | 2022-04-12 | 2022-06-24 | 广州高新兴机器人有限公司 | Heavy current charging protection circuit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204290902U (en) * | 2014-11-20 | 2015-04-22 | 重庆大及电子科技有限公司 | Integral filter |
| CN104684372A (en) * | 2015-02-13 | 2015-06-03 | 中国科学院长春光学精密机械与物理研究所 | Double-cavity isolating electromagnetic shielding structure for electric control box of spatial remote sensor |
| CN206412760U (en) * | 2017-01-25 | 2017-08-15 | 无锡天和电子有限公司 | A kind of anti-reverse voltage surge, spike and ripple protection circuit |
| CN207588698U (en) * | 2017-10-15 | 2018-07-06 | 朱灿龙 | A kind of DC supply input protects circuit |
| US20200137932A1 (en) * | 2017-04-11 | 2020-04-30 | Enraf-Nonius B.V. | Electrical Device Comprising Filter and Feedthrough Capacitor |
| CN211064005U (en) * | 2019-08-26 | 2020-07-21 | 迈特通信设备（苏州）有限公司 | Heat radiator for wave filter |
-
2020
- 2020-07-23 CN CN202010719424.9A patent/CN111953205A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204290902U (en) * | 2014-11-20 | 2015-04-22 | 重庆大及电子科技有限公司 | Integral filter |
| CN104684372A (en) * | 2015-02-13 | 2015-06-03 | 中国科学院长春光学精密机械与物理研究所 | Double-cavity isolating electromagnetic shielding structure for electric control box of spatial remote sensor |
| CN206412760U (en) * | 2017-01-25 | 2017-08-15 | 无锡天和电子有限公司 | A kind of anti-reverse voltage surge, spike and ripple protection circuit |
| US20200137932A1 (en) * | 2017-04-11 | 2020-04-30 | Enraf-Nonius B.V. | Electrical Device Comprising Filter and Feedthrough Capacitor |
| CN207588698U (en) * | 2017-10-15 | 2018-07-06 | 朱灿龙 | A kind of DC supply input protects circuit |
| CN211064005U (en) * | 2019-08-26 | 2020-07-21 | 迈特通信设备（苏州）有限公司 | Heat radiator for wave filter |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112737333A (en) * | 2020-12-28 | 2021-04-30 | 航天东方红卫星有限公司 | Secondary power supply with high conversion efficiency for satellite |
| CN113708617A (en) * | 2021-08-20 | 2021-11-26 | 北京计算机技术及应用研究所 | High-power-density DC/DC power module integrated with EMI filtering |
| CN114665560A (en) * | 2022-04-12 | 2022-06-24 | 广州高新兴机器人有限公司 | Heavy current charging protection circuit |
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Application publication date: 20201117 |