Method for wiring multilayer power conductors (ribbon cables or printed-circuit boards) when laying three-phase conducting communication lines to suppress noise due to electromagnetic pickup caused by self-induction in power circuits

FIELD: printed-circuit boards, multilayer conductors, and ribbon cables.

SUBSTANCE: proposed method involves spatial disposition of conducting communication lines which makes it possible to compensate for electromagnetic pickups in three-phase power circuits caused by self-induction and is based on compensating effect attained by superimposing electromagnetic inductances shifted in phase due to phase shift of currents carried by three adjacent conductors; novelty is that only positive (forward) currents carried by three adjacent layers and shifted in phase through 120 deg. are used in three-phase circuits. Passing three-phase current of same amplitude through three adjacent conducting tracks disposed strictly in parallel one on top of other in these three adjacent layers where columns built of conducting tracks occurring in three layers are formed we shall obtain equal-amplitude vectors in each layer using cyclic phase transfer; these vectors correspond to harmonic oscillations on vector diagram from all three phases (A, B, C).

EFFECT: maximized compensation of noise caused by self-induction.

4 cl, 3 dwg

 

The invention relates to the field of electrical engineering and can be used to increase noise immunity in the transmission 3-phase signal as by means of a flat ribbon cables, and using conductive tracks (tracks), laid in multilayer printed circuit boards. Known methods of protection from interference, for example:

1 having intertwined with a certain step and shielding 2 conductors (see p.115, RIC and symmetric cables, p.140 (protection of communication lines from electromagnetic influences) "Handbook of the young signalman" graduate school" 1985);

2 "Method and apparatus for suppressing interference in the connection means (see patent WO 94/06216 on March 17, 1994);

3 "the Method of constructing the conductive paths (routes) in the multilayer wires of the power to suppress electromagnetic interference originating from the slopes (see U.S. patent No. 5357050 on October 18, 1994 (US 005357 Q50A)).

The ribbon cables which are flexible flat ribbon with two or more conductive paths, as well as for multilayer printed wiring method Peravia conductors to reduce interference impossible.

The above methods of noise reduction is the closest prototype to the proposed technical solution is: U.S. patent No. 5357050 on October 18, 1994, "a Method of laying conductive is of orogen (tracks) in the multilayer wires of the power to suppress electromagnetic interference, outgoing from the slopes". This method of noise reduction (compensation) in single-phase circuit for multilayer printed wiring and flat ribbon cables.

In this way the lines of communication are divided into pairs:

1-I (S) communication line - signal, in which the current flows, with the sign "+"(live)* 2-I (R) is the line through which current flows, with the sign "-" (″return track″)*, in which the currents differ from each other in phase by 180°. These lines are located in the adjacent layers, so that a direct lies above the return, as shown in figure 1.

By passing an alternating current of equal amplitude value in the upper layer (1-(S) and 2-(R) paths) and in the lower layer (3-(R) and * is the wording taken from the prototype.

4-(5)), there are magnetic fields. When the phase shift of 180° harmonic oscillations of current in the conductor of the upper layer relative to the harmonic oscillations of the current in the conductor, the bottom layer of the vectors corresponding to these harmonic oscillations, and the vector diagram opposite and equal in amplitude.

Therefore, in this case there is the effect of compensation of the interference phenomenon of self-induction. Thus, noise generated in the conductive layers, will balance each other. The method proposed in the prototype, it is not possible to solve the problem of noise in 3-phase the network, as in the 3-phase network flow in adjacent layers, only currents with a "+" sign (direct), shifted in phase by 120°.

The technical result of the invention is the suppression of electromagnetic interference arising from the phenomenon of self-induction in a circuit for 3-phase network when transmitting the signal using the ribbon cables, multi-layer wiring or multilayered printed circuit boards.

The proposed method of installation when installing the conductive lines transferred for three-phase current is used to suppress electromagnetic interference arising from the phenomenon of self-induction in a circuit is to use only flowing in adjacent layers currents with a "+" sign (direct), shifted in phase by 120°.

In a symmetrical three-phase network at any point in time, the sum of the currents at a node is equal to zero, as the combination of three separate circuits have the same frequency and the amplitude of the EMF, which are shifted in phase by 120°. The current flowing in the 3-phase network, creates its own magnetic field. As shown in figure 2 and 3, comprobadas tracks must be in 3 arranged in parallel one above the other layers.

3-phase AC current flowing in the 1st layer (FA, fV, FS), shifted in phase by 120° relative to the AC current flowing in the 2nd layer (fV, FS, FA). The current flowing in the 3rd with the OE (FS, FA, fV), shifted in phase by 120° in the same direction relative to the AC current flowing in the 2nd layer and to 240° relative to the current 1-th layer. If you miss 3-phase alternating current in each layer of the conductive paths, equal amplitude, each of these layers, a magnetic field induction.

Representation of harmonic oscillations in the form of vectors on the complex plane (with the aid of vector diagrams presented in figure 3) allows to obtain the resulting value vectors at any phase shift between them.

In the first column of conductive tracks when the phase shift of 120° harmonic oscillations of current in the conductor of the 1st layer relative to the harmonic oscillations of the current in the conductor, 2-layer, harmonic oscillation of the current in the conductor 3-layer are shifted in phase by 120° in the same direction that the 1-m and 2-m layer.

In the 1st column are - (FA, fV, FS),

in the 2nd column are - (fV, FS, FA),

in the 3rd column are - (FS, FA, fV).

As the conductive layers (ribbon cable) are close, we can assume that the spatial vector are combined.

Vector equal to the amplitude of the corresponding harmonic oscillations on a vector diagram, according to the rule of the parallelogram, balance each other.

Therefore, in this case, there is the effect of compens is the interference caused by the phenomenon of self-induction. Thus, noise generated in the conductive layers, will balance each other. The loss in the transmitted signal are reduced the more, the closer the conductive layers.

1. The mounting method, which consists in the spatial location of the conductive lines, to compensate for electromagnetic interference arising in the power supply circuits of three-phase AC from the phenomenon of self-induction, based on the presence of compensating the effect of the superposition of shifted phase of electromagnetic induction, characterized in that for three-phase current are used only direct currents shifted by 120°and for suppression of electromagnetic interference is applied cyclic permutation of the phase currents

proceeding in three adjacent conductive tracks arranged parallel to each other in three adjacent layers, in which the columns are formed, consisting of conductive paths lying in these three layers, which leads to the suppression of electromagnetic interference in layers and columns; the best technical result (maximum compensation) is achieved by equality of the amplitudes of the three-phase currents flowing in layers.

2. The method according to claim 1, including the use of multilayer wires.

3. The method according to claim 1, including the use of ribbon cables.

4. The method according to claim 1, including the use of printed circuit boards.



 

Same patents:

FIELD: electronics.

SUBSTANCE: device has electronic boards block with radio-elements thereon and with radial grooves made in them, electric connectors of electronic boards and arc shields separating boards with sockets for bodies of radio-elements, connected to electronic boards by frame fixing, central bushing and rods. Along peripheral line of each arc shield slits are made, combined with radial grooves of each electronic board. Electric connectors of boards are made in form of shields curved around side surface for console portions of boards, current-conducting drawing of which is made in form of circular sectors, positioned between shields slits.

EFFECT: higher resistance to physical impact.

2 dwg

The electronic unit // 2234205
The invention relates to electronics and can be used in blocks of electronic equipment to improve cooling efficiency, in particular in the aviation lights - multi-function remote control

Electronic unit // 2233566
The invention relates to the field of electronic structures of blocks that can be used in miniature transceiver devices and control systems

Electronic unit // 2233565
The invention relates to the field of electronic structures of blocks used in missiles or portable launchers

The invention relates to the electrical industry in particular to thin film microelectronics

Electronic unit // 2224388
The invention relates to the field of electronic equipment, the design of electronic units, in which the electrical connection of printed circuit boards is carried out using electrical connectors without backplane

The invention relates to a printed circuit Board for electrical devices with RF components, in particular for mobile radio communication devices

Electronic unit // 2216886
The invention relates to electronic equipment, namely, blocks design batch containing PCB and plug-in electric connection, and can be used in computing and similar units

Electronic unit // 2216885
The invention relates to the construction of electronic blocks that can be used in equipment subjected to significant mechanical impact

The invention relates to the design and manufacturing technology transition pads and printed circuit boards and can be used in electronics, instrumentation and other engineering fields

FIELD: electronic engineering; gas panel manufacture.

SUBSTANCE: protective coating that can be used for manufacturing contact members of gas-panel strip conductors is formed on both sides of polyamide and applied by stenciling method using for the purpose dielectric composition resistant to 20-30% alkali solutions at temperature of 65 - 85oC that incorporates in its composition ethyl cellulose in the amount of maximum 9 parts by weight and organic solvent in the amount of minimum 91 parts by weight with boiling temperature of ≥ 190oC, minimal amount of ethyl cellulose and maximal amount of organic solvent being, respectively, 7.5 and 92.5 parts by weight.

EFFECT: improved rheological and protective properties of coating using proposed composition.

1 cl, 1 ex

FIELD: power supply cables.

SUBSTANCE: proposed cable that can be used to supply with power electrical loads and at the same time to transmit telephone, television, computer, and radio communication signals has one or more similar sections incorporating central flat current-carrying conductor disposed between two flat insulating tapes, the latter being disposed, in their turn, between two flat neutral conductors whose width is greater than that of current-carrying conductor by double thickness of insulating tape.

EFFECT: enhanced conductivity and enlarged functional capabilities of cable.

1 cl, 2 dwg

The invention relates to technology universal (multipurpose) electric cables for oil production that are used in conjunction with the equipment of oil and water wells to supply electric motors of submersible pumps, the limit of heating up of high-viscosity oil and gas mixture in the well, to prevent and eliminate parfenovitch tubes in the well, to the limit of heating up of pipelines, as well as the load-bearing cable

The invention relates to extruded cables, method of their production and harvesting, used for the manufacture of extruded cable this way
The invention relates to a cable technology, in particular to technology and devices for the manufacture of a ribbon (flat) cable

FIELD: power supply cables.

SUBSTANCE: proposed cable that can be used to supply with power electrical loads and at the same time to transmit telephone, television, computer, and radio communication signals has one or more similar sections incorporating central flat current-carrying conductor disposed between two flat insulating tapes, the latter being disposed, in their turn, between two flat neutral conductors whose width is greater than that of current-carrying conductor by double thickness of insulating tape.

EFFECT: enhanced conductivity and enlarged functional capabilities of cable.

1 cl, 2 dwg

FIELD: electronic engineering; gas panel manufacture.

SUBSTANCE: protective coating that can be used for manufacturing contact members of gas-panel strip conductors is formed on both sides of polyamide and applied by stenciling method using for the purpose dielectric composition resistant to 20-30% alkali solutions at temperature of 65 - 85oC that incorporates in its composition ethyl cellulose in the amount of maximum 9 parts by weight and organic solvent in the amount of minimum 91 parts by weight with boiling temperature of ≥ 190oC, minimal amount of ethyl cellulose and maximal amount of organic solvent being, respectively, 7.5 and 92.5 parts by weight.

EFFECT: improved rheological and protective properties of coating using proposed composition.

1 cl, 1 ex

FIELD: printed-circuit boards, multilayer conductors, and ribbon cables.

SUBSTANCE: proposed method involves spatial disposition of conducting communication lines which makes it possible to compensate for electromagnetic pickups in three-phase power circuits caused by self-induction and is based on compensating effect attained by superimposing electromagnetic inductances shifted in phase due to phase shift of currents carried by three adjacent conductors; novelty is that only positive (forward) currents carried by three adjacent layers and shifted in phase through 120 deg. are used in three-phase circuits. Passing three-phase current of same amplitude through three adjacent conducting tracks disposed strictly in parallel one on top of other in these three adjacent layers where columns built of conducting tracks occurring in three layers are formed we shall obtain equal-amplitude vectors in each layer using cyclic phase transfer; these vectors correspond to harmonic oscillations on vector diagram from all three phases (A, B, C).

EFFECT: maximized compensation of noise caused by self-induction.

4 cl, 3 dwg

Electric cable // 2302049

FIELD: electrochemical industry; power cables for feeding submersible motors of oil pumps.

SUBSTANCE: proposed cable has current-conductors covered with first and second insulating layers, as well as protective pad and armor common for all conductors. Insulation is made of fluorine-containing copolymers which enhances cable thermal stability to 230 °C.

EFFECT: reduced mass and size, enhanced thermal stability of cable.

9 cl, 1 dwg, 1 tbl

FIELD: electrical engineering; cables for feeding underground equipment of oil wells such as submersible oil pump motors and other pieces of equipment.

SUBSTANCE: novelty is that proposed electric cable has at least two parallel polymeric material insulated current-carrying conductors, each conductor being also covered with metal band sheath coated on two sides with crosswise corrugated polymeric material longitudinally placed on insulation with its edges overlapping; conductors covered with mentioned sheath have common external armor of spirally arranged metal bands. Mentioned sheath provided with longitudinally disposed corrugated metal band having integral polymeric weld provides for desired tightness of insulation and for its reliable protection. Compared with prior art, proposed cable is characterized in its suitability for use in oil wells in direct contact with well liquids.

EFFECT: enhanced resistance to environmental impacts, enlarged service life of cable.

1 cl, 4 dwg

Up!