CN107370362A

CN107370362A - A kind of controllable output filter of multichannel

Info

Publication number: CN107370362A
Application number: CN201710748075.1A
Authority: CN
Inventors: 杨雨泰; 梁异荣; 汪文峰; 任添翔; 朱韦翰
Original assignee: CHONGQING DAYI ELECTRONIC TECHNOLOGY Co Ltd
Current assignee: CHONGQING DAYI ELECTRONIC TECHNOLOGY Co Ltd
Priority date: 2017-08-28
Filing date: 2017-08-28
Publication date: 2017-11-21

Abstract

The invention provides a kind of controllable output filter of multichannel, and comprising shield shell, filter circuit plate and switching circuit board are provided with the shield shell；Filter circuit plate is provided with some filter branch, and switching circuit board is provided with some switching branches；The electrode input end of each filter branch is connected in parallel and is connected with positive pole input terminal, and the negative input of each filter branch is connected in parallel and is connected with negative pole input terminal；Cathode output end/cathode output end of filter branch corresponds with the input of switching branches to be connected；Cathode output end/cathode output end of filter branch corresponds with negative switch outlet terminal/positive switch outlet terminal to be connected；Switching branches include gate-controlled switch circuit, and the control terminal of gate-controlled switch circuit corresponds with control wiring pin to be connected；The control common terminal is connected with the negative input or negative switch outlet terminal of filter branch.The present invention is adapted as high-power on-load switch, and Electro Magnetic Compatibility is good.

Description

A kind of controllable output filter of multichannel

Technical field

The present invention relates to technical field of filtering, and in particular to a kind of controllable output filter of multichannel.

Background technology

In high current, powerful equipment is in use, because the limitation of power or electric current would generally select corresponding power Contactor is as switch block, but contactor volume is larger, and in switch motion its internal mechanical structure in Contact meeting There is sparking situation, so as to produce electromagnetic radiation, electromagnetic radiation is being required to will be unable to use under higher environment；Using single IGBT device is difficult to the requirement for meeting kw of power, and cost is higher, and different capacity demand will configure corresponding watt level Switching device, inconvenient for use, poor compatibility；In order to prevent external electromagnetic interference to being negatively affected caused by electronic equipment, Generally filter unit is designed with the inside of electronic equipment；But in actual use, it is connected to from power supply in each electronic equipment Cable can turn into electromagnetic interference absorption source；In order to solve problem above, it is necessary to furtherd investigate.

The content of the invention

For the deficiency in the presence of prior art, the invention provides a kind of compact, Electro Magnetic Compatibility is good and filters The controllable output filter of the good multichannel of ripple effect.

To achieve the above object, present invention employs following technical scheme：

A kind of controllable output filter of multichannel, comprising shield shell, shield shell is provided with positive pole input terminal, born Pole input terminal, control terminals, control common terminal, a number of identical positive switch outlet terminal and negative pole Outlet terminal is switched, the control terminals include to be drawn with the control wiring of positive switch outlet terminal quantity identical Pin；Filter circuit plate and switching circuit board are provided with the shield shell；Filter circuit plate is provided with some filter branch, switch Circuit board is provided with some switching branches；Wherein, the electrode input end of each filter branch be connected in parallel and with positive pole input wires End is connected, and the negative input of each filter branch is connected in parallel and is connected with negative pole input terminal；The positive pole of filter branch is defeated Go out end/cathode output end with the input one-to-one corresponding of switching branches to be connected, and be connected to positive switch outlet terminal/negative pole Switch outlet terminal；Cathode output end/cathode output end of filter branch and negative switch outlet terminal/positive switch are defeated Go out terminals one-to-one corresponding to be connected；The switching branches include gate-controlled switch circuit, the control terminal of gate-controlled switch circuit and control Wiring pin, which corresponds, to be connected；The switching device of gate-controlled switch circuit is metal-oxide-semiconductor；The control common terminal and filtering branch The negative input or negative switch outlet terminal on road are connected.

The filter branch that input of the present invention is connected in parallel realizes multiple-channel output, and each filter branch is correspondingly in series with least One switching branches, corresponding output power supply can be selected as needed；In high power load in use, passing through controlling switch branch road Parallel opertation is realized, reduces the power demand to single switching transistor；And by filter branch, the circuit design of switching branches, The interference signal or noise signal in input signal can be effectively filtered out, reduces the electromagnetic radiation among switch motion, electromagnetism Compatible result is good；Individually designed switching circuit board area of dissipation is big, and thermal conductive insulation glue, shielding shell more increase radiating surface Product, effective radiating of apparatus of the present invention when ensure that high-power use.

Compared to prior art, the present invention is adapted as high-power on-load switch, also can compatible different capacity as needed Switch switching use, and using while ensure that Electro Magnetic Compatibility, filtering part, switch sections modular design simplify portion Part structure, compact, easy to use and flexible are applied widely.

Brief description of the drawings

Fig. 1 is the schematic block circuit diagram of embodiment.

Fig. 2 is the front view of shield shell in embodiment.

Fig. 3 is the rearview of shield shell in embodiment.

Fig. 4 is the top view of shield shell in embodiment.

Fig. 5 is the circuit theory diagrams of filter branch in embodiment.

Fig. 6 is the circuit theory diagrams of switching branches in embodiment.

Embodiment

Below in conjunction with the accompanying drawings and embodiment further illustrates to the technical scheme in the present invention.

A kind of controllable output filter of multichannel, comprising shield shell, as shown in Figure 2 and Figure 3, the shield shell includes Lower cover 1 and upper lid 2, upper lid 2 are mutually permanently connected with lower cover 1 by screw 7；Filter circuit plate is provided with shield shell with opening Circuit board is closed, wherein, lower cover 1 is fixedly connected with switching circuit board, and upper lid 2 is fixedly connected with filter circuit plate；The switch electricity Road plate is provided with six switching branches, and the switching branches include gate-controlled switch circuit, and filter circuit plate is provided with four filters Ripple branch road；As shown in figure 1, the electrode input end of each filter branch is connected in parallel and is connected with positive pole input terminal In1, each filter The negative input of ripple branch road is connected in parallel and is connected with negative pole input terminal In2；The positive pole of wherein three switching branches is defeated Enter to hold in4 ', in5 ', in6 ' to be connected respectively with the cathode output end OUT4 ' of same filter branch, the filter branch also connects respectively Three cathode output end OUT4- are connected to be used with switching branches and three cathode output end OUT4 ' pairings；Its excess-three bar switchs The electrode input end in1 ' of branch road, in2 ', in3 ' respectively the cathode output end OUT1 ' with other three filter branch, OUT2 ', OUT3 ', which is corresponded, to be connected.

As shown in figure 3, being provided with six groups of filtering pair of connecting wires 8 in the side wall of upper lid 2, every group of filtering pair of connecting wires 8 includes Positive pole filters outlet terminal and negative pole filtering outlet terminal, the wherein positive pole of positive pole filtering outlet terminal and filter branch Output end, which corresponds, to be connected, and negative pole, which filters outlet terminal and corresponded with the cathode output end of each filter branch, to be connected；Bag The filtering pair of connecting wires 8 of outlet terminal and negative pole filtering outlet terminal is filtered containing positive pole to facilitate electrical equipment to use, and suitable Used in the occasion that need not switch control output, expand using range of choice, use more flexible convenience；In lower cover 1 and filter The side wall of ripple pair of connecting wires homonymy is provided with six groups of switch wire connections to 9, and every group of switch wire connection includes positive switch output to 9 and connect Line end and negative switch outlet terminal, wherein positive switch outlet terminal and the cathode output end of switching branches correspond It is connected, negative switch outlet terminal corresponds with the cathode output end of each filter branch to be connected, to form loop；

As shown in Fig. 2 being provided with control terminals 3 in the side wall of lower cover 1, control terminals 3 include to be exported with positive pole Six control wiring pins of terminals quantity identical, it is each to control control terminal TR1~TR6 of wiring pin and switching branches to distinguish Correspond and be connected；Positive pole input terminal 5, negative pole input wires are provided with side wall of the upper lid 2 with the control homonymy of terminals 3 End 6 is connected with control common terminal 4, wherein positive pole input terminal 5 with the electrode input end of filter branch, and negative pole input connects Line end 6 is connected with the negative input of filter branch, controls common terminal 4 and negative pole input terminal 6 (or Com ends) phase Even；As shown in figure 4, the two bottom sides in lower cover 1 are provided with the journal stirrup 10 that stretches out, and mounting hole 11 is provided with journal stirrup 10, Fixing device body can be facilitated by the design of journal stirrup 10 and mounting hole 11, it is easy to use.

As shown in figure 5, the filter branch includes common mode inductance L1-1, common mode inductance L1-2, or also include filter capacitor C1；Wherein common mode inductance L1-1 is connected between the electrode input end of filter branch and cathode output end, common mode inductance L1-2 strings It is associated between the negative input of filter branch and cathode output end, the filter capacitor C1 both ends positive pole with filter branch respectively Output end, cathode output end are connected；Common mode inductance L1-1, common mode inductance L1-2 share a magnet ring；Filter branch is also comprising guarantor Protection circuit；Protection circuit is connected in parallel between the cathode output end of filter branch and cathode output end；The protection circuit includes double To voltage-stabiliser tube D1, or fuse F1 is also included, fuse F1 is connected in series with bi-directional voltage stabilizing pipe D1；Filter circuit L1-1, L1-2, C1 carries out circuit clutter and interferer suppression, has peak restrained function, and D1 suppresses power supply characteristic spike protection rear end equipment, D1 series connection Fuse F1, prevent bi-directional voltage stabilizing pipe D1 breakdown failure cause short circuit.

As shown in fig. 6, switching branches include gate-controlled switch circuit, the source S of metal-oxide-semiconductor is as controllable in gate-controlled switch circuit The input of on-off circuit is connected with the output end of filter branch, the drain D of metal-oxide-semiconductor as gate-controlled switch circuit output end with Positive switch outlet terminal or negative switch outlet terminal are connected；Electric capacity is parallel between the source electrode of metal-oxide-semiconductor and drain electrode CK1；Resistance R1 is parallel between metal-oxide-semiconductor source electrode and grid, the grid of metal-oxide-semiconductor is also associated with resistance R2, resistance R2 other end K It is connected with control wiring pin；Gate-controlled switch circuit is also comprising electric capacity CK2 and voltage-regulator diode DK1, electric capacity CK2 and the pole of voltage stabilizing two Pipe DK1 is connected in parallel between the grid G of metal-oxide-semiconductor and source S；Pass through regulation resistance R1, resistance R2 sizes so that the VGS of metal-oxide-semiconductor Voltage reaches the conducting voltage of S, D pole, and voltage-regulator diode DK1 carries out pincers pressure to G, S end, protects grid G, source S not breakdown.

Positive terminal, negative terminals, control terminals, positive switch outlet terminal and negative switch output connection Hold as shielded cable, shield terminal also can be selected during actual use；The metal-oxide-semiconductor is distributed in the edge of filter circuit plate, To connect with shield shell；Heat conductive insulating pad is provided between metal-oxide-semiconductor and shield shell, it is exhausted that heat conduction is filled with shield shell Edge glue is to improve heat dispersion.

When in use, can be connected respectively between the control terminal TR1~TR6 and control common terminal 4 of switching branches small Switch or the trigger voltage unit of corresponding p-type or N-type metal-oxide-semiconductor, after closing after small switch or sending triggering level, gate-controlled switch electricity The metal-oxide-semiconductor conducting on road, so as to realize switch output control.

Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although with reference to compared with The present invention is described in detail good embodiment, it will be understood by those within the art that, can be to the skill of the present invention Art scheme is modified or equivalent substitution, and without departing from the objective and scope of technical solution of the present invention, it all should cover at this Among the right of invention.

Claims

A kind of 1. controllable output filter of multichannel, it is characterised in that：Comprising shield shell, shield shell inputs provided with positive pole Terminals, negative pole input terminal, control terminals, control common terminal, the output of a number of identical positive switch connect Line end and negative switch outlet terminal, the control terminals include and positive switch outlet terminal quantity identical control Wiring pin processed；Filter circuit plate and switching circuit board are provided with the shield shell；Filter circuit plate is provided with some filtering Branch road, switching circuit board are provided with some switching branches；Wherein, the electrode input end of each filter branch is connected in parallel and and positive pole Input terminal is connected, and the negative input of each filter branch is connected in parallel and is connected with negative pole input terminal；Filter branch The inputs of cathode output end/cathode output end and switching branches correspond and be connected, and be connected to positive switch and export and connect Line end/negative switch outlet terminal；Cathode output end/the cathode output end and negative switch outlet terminal of filter branch/ Positive switch outlet terminal, which corresponds, to be connected；The switching branches include gate-controlled switch circuit, the control of gate-controlled switch circuit End processed corresponds with control wiring pin to be connected；The switching device of gate-controlled switch circuit is metal-oxide-semiconductor；The public wiring of control End is connected with the negative input or negative switch outlet terminal of filter branch.
A kind of 2. controllable output filter of multichannel as claimed in claim 1, it is characterised in that：The filter branch includes altogether Mould inductance L1-1, common mode inductance L1-2, or also include filter capacitor C1；Wherein common mode inductance L1-1 is being connected on filter branch just Between pole input and cathode output end, common mode inductance L1-2 be connected on the negative input of filter branch and cathode output end it Between, the cathode output end with filter branch, cathode output end are connected respectively at filter capacitor C1 both ends；Common mode inductance L1-1, it is total to Mould inductance L1-2 shares a magnet ring.
A kind of 3. controllable output filter of multichannel as claimed in claim 2, it is characterised in that：Filter branch is also comprising protection Circuit；Protection circuit is connected in parallel between the cathode output end of filter branch and cathode output end；The protection circuit includes two-way Voltage-stabiliser tube D1, or fuse F1 is also included, fuse F1 is connected in series with bi-directional voltage stabilizing pipe D1.
A kind of 4. controllable output filter of multichannel as claimed in claim 1, it is characterised in that：In the gate-controlled switch circuit The source electrode of metal-oxide-semiconductor is connected as the input of gate-controlled switch circuit with the output end of filter branch, and the drain electrode of metal-oxide-semiconductor is as controllable The output end of on-off circuit is connected with positive switch outlet terminal or negative switch outlet terminal；The source electrode of metal-oxide-semiconductor and leakage Electric capacity CK1 is parallel between pole；Resistance R1 is parallel between metal-oxide-semiconductor source electrode and grid, the grid of metal-oxide-semiconductor is also associated with resistance R2 To control wiring pin.
A kind of 5. controllable output filter of multichannel as claimed in claim 4, it is characterised in that：The gate-controlled switch circuit is also Comprising electric capacity CK2 and voltage-regulator diode DK1, electric capacity CK2 and voltage-regulator diode DK1 be connected in parallel on metal-oxide-semiconductor grid and source electrode it Between.
A kind of 6. controllable output filter of multichannel as claimed in claim 1, it is characterised in that：Positive terminal, negative pole connect Line end, terminals, positive switch outlet terminal and negative switch outlet terminal are controlled as shield terminal or shielding line Cable.
A kind of 7. controllable output filter of multichannel as claimed in claim 1, it is characterised in that：Wherein filter branch Output end is connected with the input of at least two switching branches.
A kind of 8. controllable output filter of multichannel as claimed in claim 1, it is characterised in that：The metal-oxide-semiconductor is distributed in filter The edge of wave circuit plate, to connect with shield shell；Heat conductive insulating pad is provided between metal-oxide-semiconductor and shield shell.
A kind of 9. controllable output filter of multichannel as claimed in claim 1, it is characterised in that：It is filled with shield shell Thermal conductive insulation glue.
A kind of 10. controllable output filter of multichannel as claimed in claim 1, it is characterised in that：The shield shell includes Lower cover and upper lid, wherein lower cover are fixedly connected with switching circuit board, and lower cover side wall is provided with positive switch outlet terminal, negative pole is opened Close outlet terminal and control terminals；Upper lid is fixedly connected with filter circuit plate, upper lid side wall be provided with positive pole input terminal, Negative pole input terminal, control common terminal, it is additionally provided with a number of identical positive pole filtering outlet terminal and is filtered with negative pole Ripple outlet terminal；Positive pole, which filters outlet terminal and corresponded with the cathode output end of filter branch, to be connected, and negative pole filtering is defeated Go out terminals with the cathode output end one-to-one corresponding of filter branch to be connected.