CN220935022U - Cavity type electromagnetic compatible power supply system - Google Patents
Cavity type electromagnetic compatible power supply system Download PDFInfo
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- CN220935022U CN220935022U CN202322615459.XU CN202322615459U CN220935022U CN 220935022 U CN220935022 U CN 220935022U CN 202322615459 U CN202322615459 U CN 202322615459U CN 220935022 U CN220935022 U CN 220935022U
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- 230000001052 transient effect Effects 0.000 claims abstract description 23
- 239000003990 capacitor Substances 0.000 claims description 67
- 230000005669 field effect Effects 0.000 claims description 15
- 238000002955 isolation Methods 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000013461 design Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000005764 inhibitory process Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 208000031361 Hiccup Diseases 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
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Abstract
The utility model discloses a cavity type electromagnetic compatibility power supply system, which comprises a primary power supply electromagnetic compatibility processing circuit, a transient surge suppression circuit, a DC/DC power supply module and a secondary power supply electromagnetic compatibility processing circuit which are sequentially connected.
Description
Technical Field
The utility model belongs to the technical field of aircraft airborne electronic equipment, and particularly relates to a cavity type electromagnetic compatible power supply system.
Background
The power supply system on the aircraft mainly provides power supply service for all electric equipment on the aircraft, the normal work of the electric equipment on the aircraft is seriously influenced by the power supply quality and the reliability of the power supply system of the aircraft, the use performance of the electric equipment on the aircraft is directly determined by the quality of the power supply of the aircraft, and along with the progress of technology, the power supply module of the electric equipment on the aircraft is developed towards miniaturization, high reliability, wide-range power supply quality and better electromagnetic compatibility of the whole electric equipment.
The current power supply design scheme adopts an independent outsourcing filter and a surge suppression module for design, and a filter circuit, a post-stage power supply conversion circuit and other circuits are concentrated in the same cavity, and the design exists: ① The filter is placed at the far end of the power input and far away from the input power of the power supply combination, and a large cavity is not divided, and a PCB wiring and other reasons are added, so that a space coupling way between the input and the output exists, and the effect of electromagnetic compatibility is poor; ② The inherent surge suppression module has the problems of high purchase cost, long period and the like; ③ The independent filter and the surge suppression module occupy large space and are heavy in weight, and related parameters cannot be adjusted according to different switching frequencies. The general power supply design has the following drawbacks:
a) The electromagnetic compatibility effect is poor;
b) The volume is large, and the weight is heavy;
c) The cost is high;
d) Aiming at different application working condition requirements, the parameters are not adjustable;
e) The module purchasing period is long.
Disclosure of utility model
In order to overcome the defects in the prior art, the cavity type electromagnetic compatibility power supply system provided by the utility model solves the defects of the common power supply design.
In order to achieve the aim of the utility model, the utility model adopts the following technical scheme: a cavity type electromagnetic compatible power supply system comprises a primary power supply electromagnetic compatible processing circuit, a transient surge suppression circuit, a DC/DC power supply module and a secondary power supply electromagnetic compatible processing circuit which are connected in sequence.
Further: the primary power electromagnetic compatibility processing circuit is arranged in a first shielding cavity, the transient surge suppression circuit, the DC/DC power module and the secondary power electromagnetic compatibility processing circuit are arranged in a second shielding cavity, and the first shielding cavity and the second shielding cavity are interconnected through an isolation connector.
Further: the structural materials of the first shielding cavity and the second shielding cavity are aluminum alloy.
Further: the primary power electromagnetic compatibility processing circuit comprises a differential mode capacitance Cx1, a differential mode capacitance Cx2, a common mode capacitance C Y, a common mode capacitance C Y 2, a common mode inductance L1, a common mode inductance L2, a differential mode inductance L3, a differential mode inductance L4, a common mode inductance L5 and a common mode inductance L6;
One end of the differential mode capacitor Cx1 is respectively connected with one end of the differential mode capacitor Cx2, one end of the common mode capacitor C Y, and one end of the common mode inductor L5 through the common mode inductor L1, the other end of the differential mode capacitor Cx1 is respectively connected with the other end of the differential mode capacitor Cx2, one end of the common mode capacitor C Y 2, and one end of the common mode inductor L6 through the common mode inductor L2, the other end of the common mode capacitor CY1 is connected with the other end of the common mode capacitor CY2 and is connected to the housing ground, the other end of the common mode inductor L5 is connected with one end of the differential mode inductor L3, and the other end of the common mode inductor L6 is connected with one end of the differential mode inductor L4.
Further: the transient surge suppression circuit comprises a surge suppression chip U1, a resistor R1, a grounding resistor R2, a resistor R3, a grounding resistor R4, a resistor R5, a resistor R6, a resistor R7, a grounding capacitor C1, a grounding capacitor C2, a capacitor C3, a grounding capacitor C4, a diode V1 and an NMOS field effect transistor V2, wherein the model of the surge suppression chip U1 is specifically SM4363;
one end of the resistor R1 is connected with the other end of the differential mode inductor L3, one end of the resistor R3 and the drain electrode of the NMOS field effect transistor V2, the other end of the resistor R1 is connected with the pin 8 of the surge suppression chip U1 and the ground resistor R2, the pins 7 and 9 of the surge suppression chip U1 are grounded, the pin 12 of the surge suppression chip U1 is connected with the ground capacitor C2, the pin 5 of the surge suppression chip U1 is connected with the pin 6 of the surge suppression chip U1, the negative electrode of the diode V1, one end of the capacitor C3 and the other end of the resistor R3, and the other end of the capacitor C3 is connected with the positive electrode of the diode V1 and grounded;
The No. 4 pin of the surge suppression chip U1 is respectively connected with one ends of the grounding capacitor C1 and the resistor R6, the other end of the resistor R6 is connected with the grid electrode of the NMOS field effect tube V2, the No. 3 pin of the surge suppression chip U1 is respectively connected with the source electrode of the NMOS field effect tube V2 and one end of the resistor R7, the No. 2 pin of the surge suppression chip U1 is respectively connected with the other end of the resistor R7, one end of the resistor R5 and the grounding capacitor C4, and the No. 1 pin of the surge suppression chip U1 is respectively connected with the other end of the resistor R5 and the grounding resistor R4.
Further: the input end of the DC/DC power supply module is connected with the No. 2 pin of the surge suppression chip U1, and the DC/DC power supply module is provided with a first output end and a second output end.
Further: the secondary power electromagnetic compatibility processing circuit comprises a differential mode inductance L7, a differential mode inductance L8, a differential mode capacitance Cx3, a common mode capacitance C Y and a common mode capacitance C Y;
One end of the differential mode capacitor Cx3 is respectively connected with the first output end of the DC/DC power supply module and one end of the differential mode inductor L7, the other end of the differential mode inductor Cx3 is respectively connected with the second output end of the DC/DC power supply module and one end of the differential mode inductor L8, the other end of the differential mode inductor L7 is connected with one end of the common mode capacitor C Y, the other end of the differential mode inductor L8 is connected with one end of the common mode capacitor C Y, and the other end of the common mode capacitor CY4 is connected with the other end of the common mode capacitor CY3 and is connected to the housing ground.
The beneficial effects of the utility model are as follows:
(1) The cavity type electromagnetic compatibility power supply system provided by the utility model separates the primary power supply electromagnetic compatibility processing circuit from the secondary power supply electromagnetic compatibility processing circuit through the two independent shielding cavities, the components are assembled into a sealed independent LRU (line-by-line) by adopting the metal cover plate outside, the induction and radiation of an electric field, a magnetic field and electromagnetic waves to another area are controlled, the space coupling is reduced, and the electromagnetic compatibility effect is greatly improved.
(2) The utility model designs the primary power electromagnetic compatibility processing circuit, the secondary power electromagnetic compatibility processing circuit and the transient surge suppression circuit independently, is adjustable independently, has large freedom and high integration level, and has strong independent controllability, and the parameters can be adjusted according to the application condition requirements of different switching frequencies.
(3) The primary power electromagnetic compatibility processing circuit, the secondary power electromagnetic compatibility processing circuit and the transient surge suppression circuit are built by adopting the discrete resistive-capacitive sensing device, the volume is small, the weight is light, the common resistive-capacitive sensing device is provided with a standby library, the delivery period is short,
(4) Through the design technology and corresponding technical measures of transient suppression, safety protection and the like, the processed power supply meets the power supply characteristic requirement of electric equipment specified by the GJB 181B-2012 standard.
Drawings
FIG. 1 is a schematic diagram of a cavity-type electromagnetic compatible power supply system of the present utility model;
FIG. 2 is an exploded view of a cavity-type electromagnetic compatible power system according to the present utility model;
FIG. 3 is a schematic diagram of a primary power electromagnetic compatibility processing circuit of the present utility model;
FIG. 4 is a schematic diagram of a transient surge suppression circuit of the present utility model;
Fig. 5 is a schematic diagram of a secondary power electromagnetic compatibility processing circuit according to the present utility model.
Detailed Description
The following description of the embodiments of the present utility model is provided to facilitate understanding of the present utility model by those skilled in the art, but it should be understood that the present utility model is not limited to the scope of the embodiments, and all the utility models which make use of the inventive concept are protected by the spirit and scope of the present utility model as defined and defined in the appended claims to those skilled in the art.
As shown in fig. 1, in one embodiment of the present utility model, a cavity type electromagnetic compatible power supply system includes a primary power supply electromagnetic compatible processing circuit, a transient surge suppression circuit, a DC/DC power supply module, and a secondary power supply electromagnetic compatible processing circuit, which are sequentially connected.
The primary power electromagnetic compatibility processing circuit is used for carrying out primary power electromagnetic compatibility processing on the input voltage, the transient surge suppression circuit is used for protecting the back-end circuit from damage caused by abnormal power supply, and the secondary power electromagnetic compatibility processing circuit is used for carrying out secondary power electromagnetic compatibility processing on the input voltage.
The primary power electromagnetic compatibility processing circuit is arranged in a first shielding cavity, the transient surge suppression circuit, the DC/DC power module and the secondary power electromagnetic compatibility processing circuit are arranged in a second shielding cavity, and the first shielding cavity and the second shielding cavity are interconnected through an isolation connector.
As shown in fig. 2, the primary power electromagnetic compatibility processing circuit and the secondary circuit are placed in the first shielding cavity and the second shielding cavity by adopting a cavity-separating type shell, the first shielding cavity and the second shielding cavity are electrically connected by adopting an insulating wiring terminal and a J30J type sealing connector to realize external electrical connection, wherein the insulating wiring terminal is used for primary power input, the J30J type sealing connector is used for all outputs of the component, the connector and the wiring terminal are respectively arranged on the front end face and the rear end face of the shell, electromagnetic sealing gaskets are used on contact surfaces of the connector and the wiring terminal and the shell, and isolation is realized by utilizing the shell.
The structural materials of the first shielding cavity and the second shielding cavity are aluminum alloy.
As shown in fig. 3, the primary power electromagnetic compatibility processing circuit includes a differential mode capacitance Cx1, a differential mode capacitance Cx2, a common mode capacitance C Y 1, a common mode capacitance C Y 2, a common mode inductance L1, a common mode inductance L2, a differential mode inductance L3, a differential mode inductance L4, a common mode inductance L5, and a common mode inductance L6;
One end of the differential mode capacitor Cx1 is respectively connected with one end of the differential mode capacitor Cx2, one end of the common mode capacitor C Y, and one end of the common mode inductor L5 through the common mode inductor L1, the other end of the differential mode capacitor Cx1 is respectively connected with the other end of the differential mode capacitor Cx2, one end of the common mode capacitor C Y 2, and one end of the common mode inductor L6 through the common mode inductor L2, the other end of the common mode capacitor CY1 is connected with the other end of the common mode capacitor CY2 and is connected to the housing ground, the other end of the common mode inductor L5 is connected with one end of the differential mode inductor L3, and the other end of the common mode inductor L6 is connected with one end of the differential mode inductor L4.
In this embodiment, in the primary power electromagnetic compatibility processing circuit, the common mode inductance L1 and the common mode inductance L2, the common mode inductance L5 and the common mode inductance L6 form a common mode choke, the inductance of the common mode choke ranges from 1mH to tens mH, the lower the frequency is required to be determined according to the switching frequency of the switching power supply and the frequency spectrum after testing, the larger the required inductance is, the differential mode inductance L3 and the differential mode inductance L4 form differential mode filtering together with the differential mode capacitance, and the common mode inductance L1 and the common mode capacitance C Y 1, the common mode inductance L2 and the common mode capacitance C Y form a low-pass filter between two pairs of independent ports L-E and N-E, respectively, and are used for suppressing the common mode EMI signal existing on the power supply line, so that the common mode EMI signal is attenuated and is controlled to a very low level. The standby common-mode inductance formed by the common-mode inductance L5 and the common-mode inductance L6 is used for further filtering common-mode interference, wherein the capacitance value of the common-mode capacitance cannot be excessively large, otherwise, the limit requirement on leakage current in the safety standard can be exceeded, and the common-mode interference is generally below 10000 pF.
As shown in fig. 4, the transient surge suppression circuit includes a surge suppression chip U1, a resistor R1, a grounding resistor R2, a resistor R3, a grounding resistor R4, a resistor R5, a resistor R6, a resistor R7, a grounding capacitor C1, a grounding capacitor C2, a capacitor C3, a grounding capacitor C4, a diode V1, and an NMOS field effect transistor V2, where the model of the surge suppression chip U1 is specifically SM4363;
One end of the resistor R1 is connected with the other end of the differential mode inductor L3, one end of the resistor R3 and the drain electrode of the NMOS field effect transistor V2, the other end of the resistor R1 is connected with the No. 8 pin of the surge suppression chip U1 and the ground resistor R2, the No. 7 pin and the No. 9 pin of the surge suppression chip U1 are both grounded, the No. 12 pin of the surge suppression chip U1 is connected with the ground capacitor C2, the No. 5 pin of the surge suppression chip U1 is connected with the No. 6 pin of the surge suppression chip U1, the negative electrode of the diode V1, one end of the capacitor C3 and the other end of the resistor R3, and the other end of the capacitor C3 is connected with the positive electrode of the diode V1 and grounded.
The No. 4 pin of the surge suppression chip U1 is respectively connected with one ends of the grounding capacitor C1 and the resistor R6, the other end of the resistor R6 is connected with the grid electrode of the NMOS field effect tube V2, the No. 3 pin of the surge suppression chip U1 is respectively connected with the source electrode of the NMOS field effect tube V2 and one end of the resistor R7, the No. 2 pin of the surge suppression chip U1 is respectively connected with the other end of the resistor R7, one end of the resistor R5 and the grounding capacitor C4, and the No. 1 pin of the surge suppression chip U1 is respectively connected with the other end of the resistor R5 and the grounding resistor R4.
In this embodiment, the transient surge suppression circuit is implemented by using a domestic SM4363 surge suppression chip U1 and an NMOS field effect transistor V2, and has the functions of absorbing voltage spikes, bearing overvoltage surge impact of 80V/100ms, following output during undervoltage, suppressing surge current, and the like, protecting a back-end circuit from damage caused by abnormal power supply, and the principle is as follows:
(1) The output voltage is divided and input to the FB pin of the chip through the grounding resistor R4 and the resistor R5, and the internal control circuit regulates the grid voltage of the NMOS field effect transistor V2, so that the output voltage is kept at 32V when the input voltage is 80V high voltage; the input is 28V or under voltage, following the input voltage output.
(2) The chip monitors the voltage drop between the SNS pin and the OUT pin in real time, determines an overcurrent threshold value through the size of the matching resistor R7, cuts off the input of an external power supply when the product is in overcurrent or short circuit, and automatically switches on the current to realize the functions of suppressing and protecting the impulse current.
(3) The chip adopts the protection with hiccup mode and self-recovery, wherein the automatic turn-off and turn-on time of the NMOS field effect transistor V2 can be set by configuring the grounding capacitor C2 of TMR.
The input end of the DC/DC power supply module is connected with the No. 2 pin of the surge suppression chip U1, and the DC/DC power supply module is provided with a first output end and a second output end.
As shown in fig. 5, the secondary power electromagnetic compatibility processing circuit includes a differential mode inductance L7, a differential mode inductance L8, a differential mode capacitance Cx3, a common mode capacitance C Y, and a common mode capacitance C Y;
One end of the differential mode capacitor Cx3 is respectively connected with the first output end of the DC/DC power supply module and one end of the differential mode inductor L7, the other end of the differential mode inductor Cx3 is respectively connected with the second output end of the DC/DC power supply module and one end of the differential mode inductor L8, the other end of the differential mode inductor L7 is connected with one end of the common mode capacitor C Y, the other end of the differential mode inductor L8 is connected with one end of the common mode capacitor C Y, and the other end of the common mode capacitor CY4 is connected with the other end of the common mode capacitor CY3 and is connected to the housing ground.
In this embodiment, the values of the differential-mode inductance L7, the differential-mode inductance L8, the differential-mode capacitance Cx3, the common-mode capacitance C Y, and the common-mode capacitance C Y are determined and adjusted according to the switching frequency of the DC/DC power supply module, while considering parameters such as the switching frequency of the DC/DC chip of the third-stage power supply and the test result.
The working process of the system of the utility model is as follows: a cavity type electromagnetic compatible power supply system is started to work, a primary power supply electromagnetic compatible processing circuit carries out primary power supply electromagnetic compatible processing on input voltage, a power supply after the primary power supply electromagnetic compatible processing carries out transient state inhibition processing through a transient state surge suppression circuit, a rear end circuit is protected from damage caused by abnormal power supply, and after the power supply after the transient state inhibition processing passes through a DC/DC power supply module, the power supply after the transient state inhibition processing is input into a secondary power supply electromagnetic compatible processing circuit to carry out secondary power supply electromagnetic compatible processing, so that the processed power supply meets the power characteristic requirement of electric equipment specified by GJB 181B-2012 standard.
The beneficial effects of the utility model are as follows: the cavity type electromagnetic compatibility power supply system provided by the utility model separates the primary power supply electromagnetic compatibility processing circuit from the secondary power supply electromagnetic compatibility processing circuit through the two independent shielding cavities, the components are assembled into a sealed independent LRU (line-by-line) by adopting the metal cover plate outside, the induction and radiation of an electric field, a magnetic field and electromagnetic waves to another area are controlled, the space coupling is reduced, and the electromagnetic compatibility effect is greatly improved.
The utility model designs the primary power electromagnetic compatibility processing circuit, the secondary power electromagnetic compatibility processing circuit and the transient surge suppression circuit independently, is adjustable independently, has large freedom and high integration level, and has strong independent controllability, and the parameters can be adjusted according to the application condition requirements of different switching frequencies.
The primary power electromagnetic compatibility processing circuit, the secondary power electromagnetic compatibility processing circuit and the transient surge suppression circuit are built by adopting the discrete resistive-capacitive sensing device, the volume is small, the weight is light, the common resistive-capacitive sensing device is provided with a standby library, the delivery period is short,
Through the design technology and corresponding technical measures of transient suppression, safety protection and the like, the processed power supply meets the power supply characteristic requirement of electric equipment specified by the GJB 181B-2012 standard.
In the description of the present invention, it should be understood that the terms "center," "thickness," "upper," "lower," "horizontal," "top," "bottom," "inner," "outer," "radial," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be interpreted as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defined as "first," "second," "third," or the like, may explicitly or implicitly include one or more such feature.
Claims (7)
1. The cavity type electromagnetic compatible power supply system is characterized by comprising a primary power supply electromagnetic compatible processing circuit, a transient surge suppression circuit, a DC/DC power supply module and a secondary power supply electromagnetic compatible processing circuit which are connected in sequence.
2. The cavity electromagnetic compatible power system of claim 1 wherein the primary power electromagnetic compatible processing circuit is disposed in a first shielded cavity, the transient surge suppression circuit, the DC/DC power module, and the secondary power electromagnetic compatible processing circuit are disposed in a second shielded cavity, the first shielded cavity and the second shielded cavity being interconnected by an isolation connector.
3. The cavity electromagnetic compatible power system of claim 2 wherein the structural material of the first and second shielded cavities is an aluminum alloy.
4. The cavity-type electromagnetic compatible power supply system according to claim 1, wherein the primary power supply electromagnetic compatible processing circuit includes a differential mode capacitance Cx1, a differential mode capacitance Cx2, a common mode capacitance C Y, a common mode capacitance C Y 2, a common mode inductance L1, a common mode inductance L2, a differential mode inductance L3, a differential mode inductance L4, a common mode inductance L5, and a common mode inductance L6;
One end of the differential mode capacitor Cx1 is respectively connected with one end of the differential mode capacitor Cx2, one end of the common mode capacitor C Y, and one end of the common mode inductor L5 through the common mode inductor L1, the other end of the differential mode capacitor Cx1 is respectively connected with the other end of the differential mode capacitor Cx2, one end of the common mode capacitor C Y 2, and one end of the common mode inductor L6 through the common mode inductor L2, the other end of the common mode capacitor CY1 is connected with the other end of the common mode capacitor CY2 and is connected to the housing ground, the other end of the common mode inductor L5 is connected with one end of the differential mode inductor L3, and the other end of the common mode inductor L6 is connected with one end of the differential mode inductor L4.
5. The power supply system of claim 4, wherein the transient surge suppression circuit comprises a surge suppression chip U1, a resistor R1, a grounding resistor R2, a resistor R3, a grounding resistor R4, a resistor R5, a resistor R6, a resistor R7, a grounding capacitor C1, a grounding capacitor C2, a capacitor C3, a grounding capacitor C4, a diode V1, and an NMOS field effect transistor V2, and the model of the surge suppression chip U1 is specifically SM4363;
one end of the resistor R1 is connected with the other end of the differential mode inductor L3, one end of the resistor R3 and the drain electrode of the NMOS field effect transistor V2, the other end of the resistor R1 is connected with the pin 8 of the surge suppression chip U1 and the ground resistor R2, the pins 7 and 9 of the surge suppression chip U1 are grounded, the pin 12 of the surge suppression chip U1 is connected with the ground capacitor C2, the pin 5 of the surge suppression chip U1 is connected with the pin 6 of the surge suppression chip U1, the negative electrode of the diode V1, one end of the capacitor C3 and the other end of the resistor R3, and the other end of the capacitor C3 is connected with the positive electrode of the diode V1 and grounded;
The No. 4 pin of the surge suppression chip U1 is respectively connected with one ends of the grounding capacitor C1 and the resistor R6, the other end of the resistor R6 is connected with the grid electrode of the NMOS field effect tube V2, the No. 3 pin of the surge suppression chip U1 is respectively connected with the source electrode of the NMOS field effect tube V2 and one end of the resistor R7, the No. 2 pin of the surge suppression chip U1 is respectively connected with the other end of the resistor R7, one end of the resistor R5 and the grounding capacitor C4, and the No. 1 pin of the surge suppression chip U1 is respectively connected with the other end of the resistor R5 and the grounding resistor R4.
6. The cavity electromagnetic compatible power supply system according to claim 5, wherein an input end of the DC/DC power supply module is connected to pin No. 2 of the surge suppression chip U1, and the DC/DC power supply module is provided with a first output end and a second output end.
7. The cavity electromagnetic compatible power supply system according to claim 6, wherein the secondary power supply electromagnetic compatible processing circuit includes a differential mode inductance L7, a differential mode inductance L8, a differential mode capacitance Cx3, a common mode capacitance C Y, and a common mode capacitance C Y;
One end of the differential mode capacitor Cx3 is respectively connected with the first output end of the DC/DC power supply module and one end of the differential mode inductor L7, the other end of the differential mode inductor Cx3 is respectively connected with the second output end of the DC/DC power supply module and one end of the differential mode inductor L8, the other end of the differential mode inductor L7 is connected with one end of the common mode capacitor C Y, the other end of the differential mode inductor L8 is connected with one end of the common mode capacitor C Y, and the other end of the common mode capacitor CY4 is connected with the other end of the common mode capacitor CY3 and is connected to the housing ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202322615459.XU CN220935022U (en) | 2023-09-25 | 2023-09-25 | Cavity type electromagnetic compatible power supply system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322615459.XU CN220935022U (en) | 2023-09-25 | 2023-09-25 | Cavity type electromagnetic compatible power supply system |
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| CN220935022U true CN220935022U (en) | 2024-05-10 |
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| CN202322615459.XU Active CN220935022U (en) | 2023-09-25 | 2023-09-25 | Cavity type electromagnetic compatible power supply system |
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- 2023-09-25 CN CN202322615459.XU patent/CN220935022U/en active Active
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