CN211656098U

CN211656098U - Large-current ground vehicle-mounted EMI filtering control assembly

Info

Publication number: CN211656098U
Application number: CN202020488196.4U
Authority: CN
Inventors: 李国庆; 李金爽
Original assignee: Xi'an Lanjing Fluid Control Technology Co ltd
Current assignee: Xi'an Lanjing Fluid Control Technology Co ltd
Priority date: 2020-04-03
Filing date: 2020-04-03
Publication date: 2020-10-09
Anticipated expiration: 2030-04-03

Abstract

The utility model discloses a heavy current ground vehicle-mounted EMI filtering control component, which comprises a power input end, an anti-reverse connection circuit, a peak suppression circuit, a protective tube, a surge protection circuit, an EMI filter, an electronic switch circuit and a power output end; the power input end is connected with the input end of the anti-reverse connection circuit, the output end of the anti-reverse connection circuit is connected with the input end of the peak suppression circuit, the output end of the peak suppression circuit is connected with the input end of the protective tube, the output end of the protective tube is connected with the input end of the surge protection circuit, the output end of the surge protection circuit is connected with the input end of the EMI filter, the output end of the EMI filter is connected with the input end of the electronic switch circuit, and the output end of the electronic switch circuit is connected with the power output end. The utility model discloses have and prevent functions such as reverse connection, peak suppression, lightning protection and switch are controllable, can protect the normal work of back circuit under the various abnormal power that probably appear.

Description

Large-current ground vehicle-mounted EMI filtering control assembly

Technical Field

The utility model relates to a wave filter field especially indicates a on-vehicle EMI filtering control assembly in heavy current ground.

Background

The principle of the power filter is an impedance adaptation network: the greater the impedance adaptation of the input and output sides of the power filter to the power and load sides, the more effective the attenuation of electromagnetic interference. The filter can effectively filter the frequency point of the specific frequency in the power line or the frequencies except the frequency point to obtain a power signal of the specific frequency or eliminate the power signal of the specific frequency.

The protection circuit of the existing EMI filter is single, and the protection circuit cannot work normally under various abnormal power supplies which may appear.

SUMMERY OF THE UTILITY MODEL

The utility model provides a large current ground vehicle-mounted EMI filtering control assembly, the protection circuit who has solved EMI wave filter among the prior art is more single, the problem of the normal work of circuit under the various abnormal power that probably appear behind the unable protection.

The technical scheme of the utility model is realized like this:

a large-current ground vehicle-mounted EMI filtering control assembly comprises a power supply input end, an anti-reverse connection circuit, a peak suppression circuit, a protective tube, a surge protection circuit, an EMI filter, an electronic switch circuit and a power supply output end; the power input end is connected with the input end of the reverse-connection preventing circuit, the output end of the reverse-connection preventing circuit is connected with the input end of the peak suppressing circuit, the output end of the peak suppressing circuit is connected with the input end of the protective tube, the output end of the protective tube is connected with the input end of the surge protection circuit, the output end of the surge protection circuit is connected with the input end of the EMI filter, the output end of the EMI filter is connected with the input end of the electronic switch circuit, and the output end of the electronic switch circuit is connected with the power output end.

As a preferred embodiment of the present invention, the electronic switch circuit includes an electronic switch and a wireless remote control receiving circuit electrically connected to a control terminal of the electronic switch.

As a preferred embodiment of the utility model, still include metal decking and metal casing, prevent reverse connection circuit, peak suppression circuit, protective tube, surge protection circuit, EMI filter, electronic switch circuit from fixing in the step-like cavity that metal casing constitutes.

As a preferred embodiment of the present invention, four corners of the metal panel are respectively provided with fixing bolts.

As a preferred embodiment of the present invention, the metal shell is provided with a shielding layer inside.

As a preferred embodiment of the present invention, the power input terminal and the power output terminal are provided with a common mode rejection unit.

The beneficial effects of the utility model reside in that: the circuit has the functions of reverse connection prevention, peak suppression, lightning protection, switch controllability and the like, and can protect the circuit from working normally under various abnormal power supplies which may occur.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic block diagram of an embodiment of the present invention, which is a high-current ground vehicle-mounted EMI filter control module;

FIG. 2 is a circuit schematic of an anti-reverse connection circuit;

fig. 3 is a schematic structural diagram of an embodiment of the present invention, which is a large-current ground vehicle-mounted EMI filter control module.

In the figure, 1 is a power supply input end, 2 is an anti-reverse connection circuit, 3 is a peak suppression circuit, 4 is a protective tube, 5 is a surge protection circuit, 6 is an EMI filter and 7 is an electronic switch circuit; 8-power supply output terminal.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1, the utility model provides a large current ground vehicle-mounted EMI filtering control assembly, which comprises a power input end 1, an anti-reverse connection circuit 2, a peak suppression circuit 3, a protective tube 4, a surge protection circuit 5, an EMI filter 6, an electronic switch circuit 7 and a power output end 8; the power input end 1 is connected with the input end of the reverse connection preventing circuit 2, the output end of the reverse connection preventing circuit 2 is connected with the input end of the peak suppressing circuit 3, the output end of the peak suppressing circuit 3 is connected with the input end of the protective tube 4, the output end of the protective tube 4 is connected with the input end of the surge protection circuit 5, the output end of the surge protection circuit 5 is connected with the input end of the EMI filter 6, the output end of the EMI filter 6 is connected with the input end of the electronic switch circuit 7, and the output end of the electronic switch circuit 7 is connected with the power output end 8.

The utility model discloses a set up and prevent reverse connection circuit 2, peak suppression circuit 3, protective tube 4, surge protection circuit 5, EMI wave filter 6, electronic switch circuit 7, can the automatic control switch, prevent reverse connection, possess peak suppression function, have removable protective tube 4, lightning protection ability. The utility model discloses can design according to GJB6242-2008 military EMI wave filter 6 specifications.

The power input end 1 adopts YGD20N1204bJ (158 factory or Guizhou space electric appliance of the same kind), and the power output end 8 is J30J11P04KSW01W01L00(158 factory or Guizhou space electric appliance of the same kind). The circuit schematic diagram of the reverse-connection preventing circuit 2 is shown in fig. 2, the peak suppression circuit 3 is a transient power supply suppression diode connected in parallel, the surge protection circuit 5 is composed of a piezoresistor, the electronic switch circuit 7 can be composed of a thyristor or a switch tube, a control end pin of the thyristor or the switch tube is connected with a single chip microcomputer, and the single chip microcomputer can be selected by a technician or can be composed of chips such as 80C 51.

The utility model discloses a performance parameter does: the input voltage is 8V-33V, the output current is not less than 30A (tested at 24V) and not less than 42A (tested at 18V), the module voltage drop is not more than 0.8V (tested at 24V), the noise loss value is not less than 40dB, and the working temperature is-45 ℃ to 60 ℃; the storage temperature is-55 ℃ to 70 ℃.

The electronic switch circuit 7 comprises an electronic switch and a wireless remote control receiving circuit electrically connected with the control end of the electronic switch. Thereby realizing the function of remote wireless remote control switch.

As shown in fig. 3, the utility model discloses still include metal decking and metal casing, prevent reverse connection circuit 2, peak suppression circuit 3, protective tube 4, surge protection circuit 5, EMI wave filter 6, electronic switch circuit 7 and fix in the step-like cavity that metal casing constitutes. And four corners of the metal panel are respectively provided with a fixing bolt.

The utility model adopts an aluminum substrate radiator, electrolytic capacitor adopts common military products, through the optimization of the structure, the gap of the embedded position is reduced, the protruding part is reduced, the dust accumulation is avoided, through the design of the hole arrays of the front and the back panels, the air permeability is increased, and the smoothness and the dryness of the internal air flow are ensured; in addition, besides the basic dual protection of the plating layer and the coating, a layer of three-proofing paint is uniformly sprayed on the parts which are easily affected except for the electric connector, such as metal pieces, components, printed boards and the like, so as to form the coating protection.

The utility model discloses adopt following design in the aspect of the conduction: 1, a power input end 1 and a power output end 8 are provided with a common mode rejection unit; 2, adding a magnetic ring to a circuit sensitive to conduction for filtering; 3, the part of the wires adopt shielded wires, the shielding layer is well grounded, and the unshielded wires are twisted to reduce common-mode interference; 4, the power lines, the digital lines and the analog lines are distributed in a classified mode.

The radiation method adopts the following design, 1, the metal shell is integrally processed, the number of components is small, the installation gap is small, and the contact resistance is low; 2, a shielding layer is locally added, and the like, so that the radiation interference of the device to other equipment and functional units in the device is inhibited.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a on-vehicle EMI filtering control assembly in heavy current ground which characterized in that: the power supply circuit comprises a power supply input end, an anti-reverse connection circuit, a peak suppression circuit, a protective tube, a surge protection circuit, an EMI filter, an electronic switch circuit and a power supply output end; the power input end is connected with the input end of the reverse-connection preventing circuit, the output end of the reverse-connection preventing circuit is connected with the input end of the peak suppressing circuit, the output end of the peak suppressing circuit is connected with the input end of the protective tube, the output end of the protective tube is connected with the input end of the surge protection circuit, the output end of the surge protection circuit is connected with the input end of the EMI filter, the output end of the EMI filter is connected with the input end of the electronic switch circuit, and the output end of the electronic switch circuit is connected with the power output end.

2. The high current terrestrial vehicle-mounted EMI filter control assembly of claim 1, wherein: the electronic switch circuit comprises an electronic switch and a wireless remote control receiving circuit electrically connected with the control end of the electronic switch.

3. The high current terrestrial vehicle-mounted EMI filter control assembly of claim 1, wherein: the anti-reverse-connection circuit, the peak suppression circuit, the protective tube, the surge protection circuit, the EMI filter and the electronic switch circuit are fixed in a step-shaped cavity formed by the metal shell.

4. A high current terrestrial vehicle-mounted EMI filter control assembly according to claim 3, wherein: and four corners of the metal panel are respectively provided with a fixing bolt.

5. A high current terrestrial vehicle-mounted EMI filter control assembly according to claim 3, wherein: and a shielding layer is arranged inside the metal shell.

6. The high current terrestrial vehicle-mounted EMI filter control assembly of claim 1, wherein: and the power input end and the power output end are provided with a common mode rejection unit.