WO2009150279A1 - Common-mode filter and door-control device using said filter - Google Patents

Common-mode filter and door-control device using said filter Download PDF

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Publication number
WO2009150279A1
WO2009150279A1 PCT/ES2009/070217 ES2009070217W WO2009150279A1 WO 2009150279 A1 WO2009150279 A1 WO 2009150279A1 ES 2009070217 W ES2009070217 W ES 2009070217W WO 2009150279 A1 WO2009150279 A1 WO 2009150279A1
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WO
WIPO (PCT)
Prior art keywords
filter
common mode
lines
common
mode filter
Prior art date
Application number
PCT/ES2009/070217
Other languages
Spanish (es)
French (fr)
Inventor
Javier Gonzalez Fernandez
Mª Antonia GARCIA SAN ANDRES
Carlos Sancho De Mingo
Pilar MUÑOZ CONDES
Jaime DE LA PEÑA LLERANDI
Angel R. Cezon Dominguez
José A. RUIZ CANO
Original Assignee
Metro De Madrid, S.A.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Metro De Madrid, S.A. filed Critical Metro De Madrid, S.A.
Publication of WO2009150279A1 publication Critical patent/WO2009150279A1/en

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/09—Filters comprising mutual inductance
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/42—Networks for transforming balanced signals into unbalanced signals and vice versa, e.g. baluns
    • H03H7/425—Balance-balance networks
    • H03H7/427—Common-mode filters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy
    • H02J2300/24—The renewable source being solar energy of photovoltaic origin
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H1/00—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
    • H03H2001/0021—Constructional details
    • H03H2001/005—Wound, ring or feed-through type inductor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers

Definitions

  • the purpose of the present invention patent application is a new filter of the so-called "common mode" used to eliminate disturbances or noise in electrical circuits.
  • the filter that the invention proposes is intended to filter the electrical noise coming from the power and signal lines to the protected circuit, as well as minimizing the interferences that could be generated in conducted mode.
  • the object of the present invention is a device for controlling doors in the railway environment using said filter.
  • the switched power supplies incorporate a common mode filter to eliminate the interference led to the power supply. These filters are used in the power lines.
  • the common mode filter In the case of continuous feeding, the common mode filter consists of two coils, one in each supply wire, coupled on the same magnetic core. In the case of three-phase feeders, the common mode filter is made up of three coils, one in each supply wire, coupled on the same magnetic core. Finally, the feed systems based on tripoli (one input wire, one output and one common return), as in three-phase systems, the common mode filter consists of three coils, one in each feed wire, coupled on the same magnetic core, as described in European patent EP1487092.
  • the transformer will act generating voltages in its windings to try to compensate for the imbalance of currents. These tensions, which can become very high, will manifest themselves in the form of electrical noise peaks that will appear in the control and power lines.
  • Figure 2A shows how when the switch S1 is open and switch S2 is also open, the current balance is fulfilled by the coils in common mode (L1 of a first device A and L2 of a second device B). Therefore:
  • coils L1 and L2 tend to match the currents by their windings they generate a voltage VL1 and VL2 to oppose this increase in current.
  • coils L1 and L2 tend to saturate. If it is assumed that L2 is the one that is previously saturated (by constructive dispersions), the influence thereof disappears, which causes the potential of point A to be superior to that of point B, and the appearance of a current 17. This current is interpreted by equipment B as if switch S1 were closed, causing equipment B to act abnormally.
  • the common mode filter that the present invention proposes solves the aforementioned drawbacks, becoming an effective and economical alternative.
  • the common mode filter of the invention is materialized in such a way that it comprises, in addition to the coils corresponding to each feed wire (continuous, alternating, three-phase and tripoli), an extra coil for each of the control lines or external signals with reference to the common power return prior to the filter.
  • the filter of the invention is structured so that, as already mentioned, it includes an extra coil for each of the external signals with reference to the common power return.
  • the filter of the invention when introducing the signal lines referenced to the external power supply in the common mode filter, the sum of the input and output currents will be balanced, leaving all the filtered lines of electrical noise conducted in mode common when the currents remain by the different windings of the compensated coils, making sure that the filter works correctly and that the undesired tensions in the control lines and the interactions with other devices disappear.
  • Figure 1 They show a schematic diagram or circuit of a common mode filter of the state of the art for the particular case in which only one equipment or system is to be protected.
  • Figures 2A, 2B and 2C- They show three diagrams or schematic circuits of the common mode filters of the state of the art for the particular case in which two parallel connected devices are to be protected.
  • Figure 3. Shows a schematic diagram or circuit of the common mode filter of the present invention.
  • Figure 4.- Shows a schematic figure of the use of the filter of the invention when there are n control lines.
  • Figure 5. Shows two perspective figures of the physical embodiment of a common mode filter of the invention in case there are 2 power lines and 3 control lines referenced to the power supply.
  • Figure 6. Shows, also schematically, the application of the filter of the invention in a door control device. PREFERRED EMBODIMENT OF THE INVENTION
  • control signals can be both input and output, for example in the case where it is necessary to command external loads from the control equipment, even with different potential references, provided that all lines are filtered of electrical noises conducted in common mode when the currents (H, 12, 13 and 14) remain by the different windings of the coils (L1, L2, L3 and L4) compensated, making sure that the filter works correctly and disappears the unwanted tensions in control lines and interactions with other devices.
  • the two control lines (3) and (4) have no negative effect on the filter when the currents remain due to the different windings of the coils (L3) and (L4) compensated.
  • the filter of the invention is capable of being extended in case there are n control lines (1, 2, ... n) for a circuit (5) or electronic equipment, according to the needs of each application.
  • Figure 5 shows a possible physical embodiment of a common mode filter of the invention in the case that there are 2 windings as feed lines (7,8) and 3 windings as control lines (9, 10, 1 1) referenced to the feed. All lines (7, 8, 9, 10 and 1 1) are magnetically coupled to each other through a magnetic core (12), wherein said magnetic core (12) may be toroidal in shape, or in any other way as E, U, I cores, etc.
  • the magnetic core (12) may also be formed by joining several toroids of different permeability to achieve attenuations at different frequencies.
  • the windings of the inductances can be made of different sections depending on the current flowing through them.
  • a door control device specifically, for the control of opening doors, for example in the railway field, where said door is commanded by a door control unit (13) or CPU, shown schematically in Figure 6, where the problems indicated in the current state of the art may appear, that is, where said door control units (13) are fed by the same power supply ( 6), typically 1 10 volts, which share two control lines (1) and (2), one for

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Filters And Equalizers (AREA)

Abstract

The invention relates to a common-mode filter and to a device which uses said filter in order to control the doors of railway vehicles, in which the filter is intended to filter electrical noise originating from signal and power lines, essentially comprising a structure whereby the external control lines (1, 2, 3, 4) intended for common power return consist of a coil such that the sum of the input and output currents of the filter is balanced.

Description

FILTRO EN MODO COMÚN Y DISPOSITIVO DE CONTROL DE PUERTAS QUE FILTER IN COMMON MODE AND DOOR CONTROL DEVICE THAT
UTILIZA DICHO FILTROUSE SUCH FILTER
D E S C R I P C I Ó ND E S C R I P C I Ó N
OBJETO DE LA INVENCIÓNOBJECT OF THE INVENTION
La presente solicitud de Patente de Invención tiene por objeto un nuevo filtro de los denominados "en modo común" utilizado para eliminar las perturbaciones o ruidos en los circuitos eléctricos.The purpose of the present invention patent application is a new filter of the so-called "common mode" used to eliminate disturbances or noise in electrical circuits.
Más concretamente, el filtro que Ia invención propone tiene por objeto filtrar los ruidos eléctricos procedentes de las líneas de alimentación y de señales hacia el circuito protegido, así como minimizar las interferencias que en modo conducido se pudieran generar.More specifically, the filter that the invention proposes is intended to filter the electrical noise coming from the power and signal lines to the protected circuit, as well as minimizing the interferences that could be generated in conducted mode.
Además, es objeto de Ia presente invención un dispositivo para el control de puertas en el entorno ferroviario que utiliza dicho filtro.In addition, the object of the present invention is a device for controlling doors in the railway environment using said filter.
ANTECEDENTES DE LA INVENCIÓNBACKGROUND OF THE INVENTION
En general, al alimentar un circuito desde una fuente de tensión externa, éste puede recibir y generar interferencias que perturben tanto su propio funcionamiento como el del resto de los equipos conectados a Ia misma tensión externa.In general, when feeding a circuit from an external voltage source, it can receive and generate interference that disturb both its own operation and that of the rest of the equipment connected to the same external voltage.
En Ia actualidad, las fuentes conmutadas de alimentación incorporan un filtro en modo común para eliminar las interferencias conducidas a Ia alimentación. Estos filtros se utilizan en las líneas de alimentación.At present, the switched power supplies incorporate a common mode filter to eliminate the interference led to the power supply. These filters are used in the power lines.
En el caso de alimentación continua el filtro en modo común está formado por dos bobinas, una en cada hilo de alimentación, acopladas sobre un mismo núcleo magnético. En caso de alimentadores trifásicos el filtro en modo común esta formado por tres bobinas, una en cada hilo de alimentación, acopladas sobre un mismo núcleo magnético. Por último los sistemas de alimentación basados en tripolos (un hilo de entrada, uno de salida y un retorno común), al igual que en los sistemas trifásicos, el filtro en modo común está formado por tres bobinas, una en cada hilo de alimentación, acopladas sobre un mismo núcleo magnético, como se describe en Ia patente europea EP1487092.In the case of continuous feeding, the common mode filter consists of two coils, one in each supply wire, coupled on the same magnetic core. In the case of three-phase feeders, the common mode filter is made up of three coils, one in each supply wire, coupled on the same magnetic core. Finally, the feed systems based on tripoli (one input wire, one output and one common return), as in three-phase systems, the common mode filter consists of three coils, one in each feed wire, coupled on the same magnetic core, as described in European patent EP1487092.
Así, típicamente, existen diferentes filtros de este tipo dependiendo de Ia naturaleza de Ia referencia de dichas líneas, las cuales pueden ser:Thus, typically, there are different filters of this type depending on the nature of the reference of said lines, which can be:
- Líneas de entrada de alimentación que deben pasar por el filtro como es habitual.- Power input lines that must pass through the filter as usual.
- Señales que provienen del exterior y cuya referencia se hace a un potencial interno del circuito a proteger y por Io tanto no presentan ningún problema y no deben pasar por el filtro ya que a todos los efectos son señales internas, independientemente de que se cableen dentro o fuera de Ia placa que contiene Ia electrónica; y- Signals that come from outside and whose reference is made to an internal potential of the circuit to be protected and therefore do not present any problem and should not pass through the filter since for all intents and purposes they are internal signals, regardless of whether they are wired inside or outside the board containing the electronics; Y
- Señales que provienen del exterior y cuya referencia se hace a un potencial anterior al filtro, o dicho de otro modo, señales de control exteriores utilizadas en sistemas para cuya protección se utiliza un filtro en modo común para las líneas de alimentación (activo y retorno), en donde dichas señales cuentan con retornos comunes al retorno de las líneas de alimentación.- Signals that come from outside and whose reference is made to a potential prior to the filter, or in other words, external control signals used in systems for whose protection a common mode filter is used for the supply lines (active and return ), where these signals have common returns to the return of the power lines.
Para este último caso, sin embargo, los filtros en modo común convencionales presentan serias deficiencias, pues dichas señales aportan unas corrientes directas al sistema que no entran por el filtro en modo común, pero que sí salen por él, produciendo Ia descompensación del mismo, y haciendo que éste se comporte como un generador de ruido eléctrico. Es decir, que dichas señales descompensan el flujo de corrientes de entrada y salida del filtro haciéndole trabajar de forma incorrecta y generando ruido indeseable tanto en las líneas de control como en Ia alimentación.For the latter case, however, conventional common mode filters have serious deficiencies, since these signals provide direct currents to the system that do not enter through the filter in common mode, but that do exit through it, producing decompensation thereof, and making it behave like an electric noise generator. That is to say, said signals decompensate the flow of filter in and out currents by making it work improperly and generating undesirable noise both in the control lines and in the power supply.
Dicho de otro modo, dado que Ia filosofía de este tipo de filtros en modo común se basa en que Ia suma de las corrientes entrantes y salientes ha de ser forzosamente cero por tener sentidos inversos, de no ser así significa que parte de Ia corriente circula por alguna línea exterior y luego retorna por el filtro, generando tensiones de Ia polaridad y valor adecuadas en él para intentar compensar este desequilibrio.In other words, given that the philosophy of this type of filters in mode common is based on the fact that the sum of the incoming and outgoing currents must necessarily be zero because of having inverse senses, otherwise it means that part of the current flows through some outside line and then returns through the filter, generating polarity tensions and adequate value in it to try to compensate for this imbalance.
De forma más concreta, en Ia figura 1 puede verse un circuito esquemático que representa dicho inconveniente presentado por el estado de Ia técnica actual de este tipo de filtros, en donde se aprecia cómo Ia bobina L estaría compensada sólo en el caso de pasar Ia misma corriente por sus dos bobinas, es decir, si se da Ia condición de que 12 = 13. Esto es cierto siempre que 11 tenga un valor de cero amperios.More specifically, in Figure 1 a schematic circuit can be seen that represents said inconvenience presented by the current state of the art of this type of filters, where it is appreciated how the coil L would be compensated only in the case of passing the same current through its two coils, that is, if the condition is given that 12 = 13. This is true provided that 11 has a value of zero amps.
Sin embargo, en el momento de aplicar una señal de tensión positiva con respecto a Ia línea de tierra, aparece una corriente 11 que retornará a tierra porHowever, at the time of applying a positive voltage signal with respect to the ground line, a current 11 appears that will return to ground by
Ia bobina inferior de L. Esto hace que ahora:The lower coil of L. This causes that now:
13 = 11 + 12; Io cual lleva a Ia incongruencia de tener que cumplir simultáneamente:13 = 11 + 12; Which leads to the inconsistency of having to comply simultaneously:
I3 = I2 I3 = I2 + 11 con I1# OI3 = I2 I3 = I2 + 11 with I1 # O
Como esto es, lógicamente, imposible, el transformador actuará generando tensiones en sus bobinados para intentar compensar el desequilibrio de corrientes. Estas tensiones, que pueden llegar a ser muy elevadas, se manifestarán en forma de picos de ruido eléctrico que aparecerán en las líneas de control y alimentación.As this is logically impossible, the transformer will act generating voltages in its windings to try to compensate for the imbalance of currents. These tensions, which can become very high, will manifest themselves in the form of electrical noise peaks that will appear in the control and power lines.
Además, en el caso de que existiesen otros equipos conectados alimentados en paralelo dichos picos de ruido llegarán también a ellos, habiéndose verificado experimentalmente que existe una visible perturbación en el funcionamiento de los mismos, tal y como puede apreciarse en las figuras 2A, 2B yIn addition, in the case of other connected equipment fed in parallel, said noise peaks will also reach them, having experimentally verified that there is a visible disturbance in their operation, as can be seen in Figures 2A, 2B and
2C.2 C.
De forma más concreta, en Ia figura 2A se muestra cómo cuando el interruptor S1 se encuentra abierto y el interruptor S2 también está abierto se cumple el balance de corrientes por las bobinas en modo común (L1 de un primer equipo A y L2 de un segundo equipo B). Por Io tanto:More specifically, Figure 2A shows how when the switch S1 is open and switch S2 is also open, the current balance is fulfilled by the coils in common mode (L1 of a first device A and L2 of a second device B). Therefore:
11 =12 13=1411 = 12 13 = 14
En Ia figura 2B se cierra el interruptor S2 dejando abierto el interruptor S1. Aparecen las corrientes 15 e 16. En esta situación se tiene que cumplir:In Figure 2B the switch S2 is closed leaving the switch S1 open. Currents 15 and 16 appear. In this situation, the following must be met:
12=11 +15 I4=I3+I612 = 11 +15 I4 = I3 + I6
Como las bobinas L1 y L2 tienden a igualar las corrientes por sus bobinados generan una tensión VL1 y VL2 para oponerse a este incremento de corriente. Por último, como puede verse en Ia figura 2C, dado que Ia diferencia de corrientes persiste, las bobinas L1 y L2 tienden a saturarse. Si se supone que sea L2 Ia que antes se sature (por dispersiones constructivas), Ia influencia de Ia misma desaparece, Io que hace que el potencial del punto A se haga superior al del punto B, y Ia aparición de una corriente 17. Esta corriente es interpretada por el equipo B como si estuviese cerrado el interruptor S1 , produciendo que el equipo B actúe de forma anómala.As coils L1 and L2 tend to match the currents by their windings they generate a voltage VL1 and VL2 to oppose this increase in current. Finally, as can be seen in Figure 2C, given that the difference in currents persists, coils L1 and L2 tend to saturate. If it is assumed that L2 is the one that is previously saturated (by constructive dispersions), the influence thereof disappears, which causes the potential of point A to be superior to that of point B, and the appearance of a current 17. This current is interpreted by equipment B as if switch S1 were closed, causing equipment B to act abnormally.
Así, para un caso particular de control de varios sistemas alimentados a Ia misma tensión que comparten líneas de control, como puede ser el utilizado para el control de puertas de viajeros en donde dichas señales de control pueden ser las de apertura y cierre de las puertas, surge el problema de Ia aparición de señales en una de las líneas de control creadas por Ia influencia de Ia otra, como se ha explicado anteriormente, provocando un funcionamiento descontrolado del sistema.Thus, for a particular case of control of several systems fed to the same voltage that share control lines, such as that used for the control of passenger doors where said control signals can be those of opening and closing the doors , the problem arises of the appearance of signals in one of the control lines created by the influence of the other, as explained above, causing uncontrolled operation of the system.
Para tratar de solucionar estos problemas señalados, se dispone en el estado de Ia técnica de diferentes soluciones, como son:To try to solve these problems, different solutions are available in the state of the art, such as:
- Incluir sofisticados filtros por cada línea de entrada que minimicen los efectos del ruido generado; o - Utilizar optoacopladores, relés u otro tipo de aisladores galvánicos para las señales que independicen Ia alimentación a ambos lados del filtro, y que presentan Ia ventaja respecto a Ia técnica anterior de que siempre es preferible no producir ruidos eléctricos a producirlos y luego eliminarlos.- Include sophisticated filters for each input line that minimize the effects of the generated noise; or - Use optocouplers, relays or other types of galvanic isolators for signals that separate the power supply to both sides of the filter, and that have the advantage over the prior art that it is always preferable not to produce electrical noise to produce them and then eliminate them.
Ambas soluciones, sin embargo, presentan los problemas derivados de un mayor coste y por Io tanto un encarecimiento del sistema en general, así como el de un aporte de elementos electrónicos extra susceptibles de fallos que disminuyen Ia fiabilidad del sistema, con una mayor ocupación de placa.Both solutions, however, present the problems derived from a higher cost and therefore a higher cost of the system in general, as well as a contribution of extra electronic elements susceptible to failures that decrease the reliability of the system, with a greater occupation of license plate.
DESCRIPCIÓN DE LA INVENCIÓNDESCRIPTION OF THE INVENTION
El filtro en modo común que Ia presente invención propone soluciona los inconvenientes antes señalados, constituyéndose como una alternativa efectiva y económica.The common mode filter that the present invention proposes solves the aforementioned drawbacks, becoming an effective and economical alternative.
Así, el filtro en modo común de Ia invención se materializa de tal forma que comprende, además de las bobinas correspondientes a cada hilo de alimentación (continua, alterna, trifásica y tripolos), una bobina extra por cada una de las líneas de control o señales externas con referencia al retorno de alimentación común anterior al filtro.Thus, the common mode filter of the invention is materialized in such a way that it comprises, in addition to the coils corresponding to each feed wire (continuous, alternating, three-phase and tripoli), an extra coil for each of the control lines or external signals with reference to the common power return prior to the filter.
Más concretamente, cuando las líneas de control o señales que provienen del exterior se referencian a un potencial anterior al filtro, que son las que descompensarían el flujo de corrientes de entrada y salida de éste haciéndole trabajar de forma incorrecta y generando ruido indeseable tanto en las líneas de control como en Ia alimentación, el filtro de Ia invención se estructura de forma que, como ya se ha dicho, incluya una bobina extra por cada una de las señales externas con referencia al retorno de alimentación común.More specifically, when the control lines or signals that come from outside are referred to a potential prior to the filter, which are those that would decompensate the flow of input and output currents of the latter making it work improperly and generating undesirable noise in both Control lines as in the supply, the filter of the invention is structured so that, as already mentioned, it includes an extra coil for each of the external signals with reference to the common power return.
Así, en el filtro de Ia invención, al introducir las líneas de señal referenciadas a Ia alimentación externa en el filtro de modo común, Ia suma de las corrientes de entrada y salida quedarán equilibradas, quedando todas las líneas filtradas de ruidos eléctricos conducidos en modo común al quedar las corrientes por los distintos devanados de Ia bobinas compensadas, consiguiéndose que el filtro funcione correctamente y que así desaparezcan las tensiones indeseadas en las líneas de control y las interacciones con otros dispositivos.Thus, in the filter of the invention, when introducing the signal lines referenced to the external power supply in the common mode filter, the sum of the input and output currents will be balanced, leaving all the filtered lines of electrical noise conducted in mode common when the currents remain by the different windings of the compensated coils, making sure that the filter works correctly and that the undesired tensions in the control lines and the interactions with other devices disappear.
DESCRIPCIÓN DE LOS DIBUJOSDESCRIPTION OF THE DRAWINGS
Para complementar Ia descripción que se está realizando y con objeto de ayudar a una mejor comprensión de las características de Ia invención, de acuerdo con un ejemplo preferente de realización práctica de Ia misma, se acompaña como parte integrante de dicha descripción un juego de dibujos en donde con carácter ilustrativo y no limitativo, se ha representado Io siguiente:To complement the description that is being made and in order to help a better understanding of the characteristics of the invention, according to a preferred example of practical realization of the same, a set of drawings is accompanied as an integral part of said description. where, as an illustration and not limitation, the following has been represented:
Figura 1.- Muestran un diagrama o circuito esquemático de un filtro en modo común del estado de Ia técnica para el caso particular en el que únicamente se quiere proteger un equipo o sistema.Figure 1.- They show a schematic diagram or circuit of a common mode filter of the state of the art for the particular case in which only one equipment or system is to be protected.
Figuras 2A, 2B y 2C- Muestran tres diagramas o circuitos esquemáticos de los filtros en modo común del estado de Ia técnica para el caso particular en el que se quieren proteger dos equipos conectados en paralelo.Figures 2A, 2B and 2C- They show three diagrams or schematic circuits of the common mode filters of the state of the art for the particular case in which two parallel connected devices are to be protected.
Figura 3.- Muestra un diagrama o circuito esquemático del filtro en modo común de Ia presente invención.Figure 3.- Shows a schematic diagram or circuit of the common mode filter of the present invention.
Figura 4.- Muestra una figura esquemática de Ia utilización del filtro de Ia invención cuando existen n líneas de control.Figure 4.- Shows a schematic figure of the use of the filter of the invention when there are n control lines.
Figura 5.- Muestra sendas figuras en perspectiva de Ia realización física de un filtro en modo común de Ia invención para el caso de que existan 2 líneas de alimentación y 3 líneas de control referenciadas a Ia alimentación.Figure 5.- Shows two perspective figures of the physical embodiment of a common mode filter of the invention in case there are 2 power lines and 3 control lines referenced to the power supply.
Figura 6.- Muestra, de forma también esquemática, Ia aplicación del filtro de Ia invención en un dispositivo de control de puertas. REALIZACIÓN PREFERENTE DE LA INVENCIÓNFigure 6.- Shows, also schematically, the application of the filter of the invention in a door control device. PREFERRED EMBODIMENT OF THE INVENTION
Según una posible realización práctica de Ia invención, apreciable en Ia figura 3, para el caso en el que el filtro en modo común de Ia invención se aplica a un circuito (5) o equipo electrónico, que consta de una fuente de alimentación (6) de corriente continua, con cuatro líneas de control (1 , 2, 3 y 4), en donde las líneas de control (1 ) y (2) están referenciadas al punto de 0 voltios de dicha fuente de alimentación (6), anterior al filtro, mientras que las líneas de control (3) y (4) están referenciadas a un potencial interno del circuito (5).According to a possible practical embodiment of the invention, appreciable in Figure 3, for the case in which the common mode filter of the invention is applied to a circuit (5) or electronic equipment, consisting of a power supply (6 ) of direct current, with four control lines (1, 2, 3 and 4), where the control lines (1) and (2) are referenced to the 0 volt point of said power supply (6), above to the filter, while the control lines (3) and (4) are referenced to an internal potential of the circuit (5).
Así, según dicha figura 3, al introducir las líneas de control (1 ) y (2) referenciadas a Ia alimentación externa en el filtro de modo común, Ia suma de las corrientes de entrada y salida (11 , 12, 13 e 14) quedará equilibrada.Thus, according to said figure 3, when introducing the control lines (1) and (2) referenced to the external power supply in the common mode filter, the sum of the input and output currents (11, 12, 13 and 14) It will be balanced.
En realizaciones alternativas, las señales de control pueden ser tanto de entrada como de salida, por ejemplo para el caso en el que se necesitara comandar cargas exteriores desde el equipo de control, incluso con referencias de potencial distintas, siempre que se cumpla que todas las líneas queden filtradas de ruidos eléctricos conducidos en modo común al quedar las corrientes (H , 12, 13 e 14) por los distintos devanados de Ia bobinas (L1 , L2, L3 y L4) compensadas, consiguiéndose que el filtro funcione correctamente y desaparezcan las tensiones indeseadas en las líneas de control y las interacciones con otros dispositivos.In alternative embodiments, the control signals can be both input and output, for example in the case where it is necessary to command external loads from the control equipment, even with different potential references, provided that all lines are filtered of electrical noises conducted in common mode when the currents (H, 12, 13 and 14) remain by the different windings of the coils (L1, L2, L3 and L4) compensated, making sure that the filter works correctly and disappears the unwanted tensions in control lines and interactions with other devices.
Más concretamente, en este esquema, las corrientes 11 e 12 introducidas al activarse las líneas de control (1 ) y (2), pasan por las correspondientes bobinas del filtro (L1 ), (L2), retornando hacia el punto de 0 voltios de Ia fuente de alimentación (6) por Ia bobina (L4) inferior. Por Io tanto Ia suma de corrientes 11 + 12 + 13 - 14 = 0 A, quedando el transformador totalmente equilibrado. Las dos líneas de control (3) y (4) no tienen ningún efecto negativo sobre el filtro al quedar las corrientes por los distintos devanados de Ia bobinas (L3) y (L4) compensadas.More specifically, in this scheme, the currents 11 and 12 introduced when the control lines (1) and (2) are activated, pass through the corresponding filter coils (L1), (L2), returning to the point of 0 volts of The power supply (6) by the lower coil (L4). Therefore, the sum of currents 11 + 12 + 13 - 14 = 0 A, leaving the transformer fully balanced. The two control lines (3) and (4) have no negative effect on the filter when the currents remain due to the different windings of the coils (L3) and (L4) compensated.
Según una posible realización de Ia invención mostrada esquemáticamente en Ia figura 4, el filtro de Ia invención es susceptible de ser ampliado para el caso de que existan n líneas de control (1 , 2, ... n) para un circuito (5) o equipo electrónico, según las necesidades de cada aplicación. En Ia figura 5 se muestra una posible realización física de un filtro en modo común de Ia invención para el caso de que existan 2 bobinados a modo de líneas de alimentación (7,8) y 3 bobinados a modo de líneas de control (9, 10, 1 1 ) referenciadas a Ia alimentación. Todas las líneas (7, 8, 9, 10 y 1 1 ) están acopladas magnéticamente entre ellas a través de un núcleo magnético (12), en donde dicho núcleo magnético (12) podrá ser de forma toroidal, o de cualquier otra forma como núcleos E, U, I, etc.According to a possible embodiment of the invention shown schematically in Figure 4, the filter of the invention is capable of being extended in case there are n control lines (1, 2, ... n) for a circuit (5) or electronic equipment, according to the needs of each application. Figure 5 shows a possible physical embodiment of a common mode filter of the invention in the case that there are 2 windings as feed lines (7,8) and 3 windings as control lines (9, 10, 1 1) referenced to the feed. All lines (7, 8, 9, 10 and 1 1) are magnetically coupled to each other through a magnetic core (12), wherein said magnetic core (12) may be toroidal in shape, or in any other way as E, U, I cores, etc.
El núcleo magnético (12) podrá ser además formado juntando varios toroides de distinta permeabilidad para conseguir atenuaciones a distintas frecuencias. Igualmente, los bobinados de las inductancias se podrán hacer de distinta sección dependiendo de Ia corriente que circule por ellos.The magnetic core (12) may also be formed by joining several toroids of different permeability to achieve attenuations at different frequencies. Likewise, the windings of the inductances can be made of different sections depending on the current flowing through them.
Dentro de las posibles aplicaciones prácticas de Ia invención se encuentra Ia de un dispositivo de control de puertas, específicamente, para el control de apertura en puertas, por ejemplo en el ámbito ferroviario, en donde dicha puerta es comandada por una unidad de control de puertas (13) o UCP, mostrada esquemáticamente en Ia figura 6, en donde pueden aparecer los problemas señalados del estado de Ia técnica actual, es decir, en donde dichas unidades de control de puertas (13) están alimentadas por Ia misma fuente de alimentación (6), típicamente de 1 10 voltios, que comparten dos líneas de control (1 ) y (2), una paraWithin the possible practical applications of the invention is that of a door control device, specifically, for the control of opening doors, for example in the railway field, where said door is commanded by a door control unit (13) or CPU, shown schematically in Figure 6, where the problems indicated in the current state of the art may appear, that is, where said door control units (13) are fed by the same power supply ( 6), typically 1 10 volts, which share two control lines (1) and (2), one for
Ia orden de cierre y otra para Ia orden de apertura que ejecuta el conductor que están referenciadas a dicha fuente de alimentación (6). Estos problemas serían, para este caso, el de Ia aparición de corrientes por las líneas de control (1 ) y (2) que podrían hacer que las puertas se abriesen o cerrasen sin que se hubiese ejecutadoThe closing order and another for the opening order executed by the conductor that are referenced to said power supply (6). These problems would be, for this case, the appearance of currents through the control lines (1) and (2) that could cause the doors to open or close without having been executed
Ia orden para ello.The order for it.
Sin embargo, al aplicarse el filtro de Ia invención, es decir, al introducir las líneas de control (1 ) y (2) referenciadas a Ia alimentación externa en el filtro de modo común según Io descrito, o dicho de otro modo, al incluir una bobina extra por cada una de dichas líneas de control (1 ) y (2) Ia suma de las corrientes de entrada y salida quedará equilibrada gracias a Ia compensación de corrientes por las bobinas. However, when applying the filter of the invention, that is, by introducing the control lines (1) and (2) referenced to the external power supply in the common mode filter as described, or in other words, by including an extra coil for each of said control lines (1) and (2) the sum of the input and output currents will be balanced thanks to the compensation of currents by the coils.

Claims

R E I V I N D I C A C I O N E S
1.- Filtro en modo común que comprende varias líneas de alimentación cada una de las cuales incorpora una bobina y varias líneas de control (1 , 2, 3, 4) exteriores caracterizado porque Ia línea o líneas de control (1 , 2) referenciadas al retorno de alimentación común anterior al filtro comprenden una bobina de forma que se equilibre Ia suma de las corrientes de entrada y salida del filtro.1.- Common mode filter comprising several supply lines each of which incorporates a coil and several external control lines (1, 2, 3, 4) characterized in that the referenced line or control lines (1, 2) to the return of common feeding previous to the filter they comprise a coil so that the sum of the input and output currents of the filter is balanced.
2.- Filtro en modo común según reivindicación primera caracterizado porque comprende un núcleo magnético (12) sobre el cual se bobinan tanto las líneas de alimentación como las líneas de control referenciadas al retorno de alimentación común, acoplándose magnéticamente entre ellas.2. - Common mode filter according to claim one, characterized in that it comprises a magnetic core (12) on which both the power lines and the control lines referenced to the common power return are wound, magnetically coupling between them.
3.- Filtro en modo común según reivindicación segunda caracterizado porque el núcleo magnético (12) es de forma toroidal, "E" o "I".3.- Common mode filter according to claim 2, characterized in that the magnetic core (12) is toroidal, "E" or "I".
4.- Filtro en modo común según reivindicaciones segunda o tercera caracterizado porque el núcleo magnético (12) comprende varios toroides.4.- Common mode filter according to second or third claims characterized in that the magnetic core (12) comprises several toroids.
5.- Filtro en modo común según reivindicación primera caracterizado porque las líneas de control (1 , 2, 3, 4) son líneas de entrada o de salida.5.- Common mode filter according to claim one, characterized in that the control lines (1, 2, 3, 4) are input or output lines.
6.- Dispositivo para el control de puertas en vehículos ferroviarios que comprende una unidad de control de puertas (13) para cada puerta y dos líneas de control (1 , 2) una para Ia apertura y otra para el cierre referenciadas a Ia fuente de alimentación (6), caracterizado porque comprende, para cada unidad de control de puertas (13) de un filtro en modo común según las reivindicaciones 1 a 5. 6.- Device for the control of doors in railway vehicles comprising a door control unit (13) for each door and two control lines (1, 2) one for opening and one for closing referring to the source of supply (6), characterized in that it comprises, for each door control unit (13) a common mode filter according to claims 1 to 5.
PCT/ES2009/070217 2008-06-10 2009-06-10 Common-mode filter and door-control device using said filter WO2009150279A1 (en)

Applications Claiming Priority (2)

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ESP200801753 2008-06-10
ES200801753A ES2348883B1 (en) 2008-06-10 2008-06-10 FILTER IN COMMON MODE AND DOOR CONTROL DEVICE USED BY SUCH FILTER.

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WO2009150279A1 true WO2009150279A1 (en) 2009-12-17

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1487092A1 (en) 2003-06-13 2004-12-15 Alcatel Power switching system
JP2005080337A (en) * 2003-08-28 2005-03-24 Toshiba Kyaria Kk Noise filter, electric apparatus, and air conditioner

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1487092A1 (en) 2003-06-13 2004-12-15 Alcatel Power switching system
JP2005080337A (en) * 2003-08-28 2005-03-24 Toshiba Kyaria Kk Noise filter, electric apparatus, and air conditioner

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ES2348883A1 (en) 2010-12-16

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