Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
  • H01F38/14—Inductive couplings

Definitions

• the present invention relates to a device for coupling, with galvanic isolation, of the "certain cut" type of two electrical circuits.
• the invention may be used in a device used to remotely control and monitor the bulbs of a public lighting network, such as that described in patent FR No. 95 05748 of May 12, 1995 filed in the name of the Applicant.
• this device involves, near each of the discharge lamps fitted to the candelabra, a means of transmission / reception by current carrying messages conveyed by the power supply lines of these candelabras, these messages coming from or being transmitted.
• the transmission / reception means associated with a lamp are coupled, on the one hand, to a device for controlling the switching on and off of the lamp, according to instructions issued by the central station and, on the other hand , to a lamp fault detection circuit which generates, if necessary, a fault signal intended for the central station.
• the electrical network intended to supply the candelabras usually involves at least one electrical transformer station making it possible to transform the high voltage electrical current which it receives into three-phase low voltage electrical current intended to supply a set of electrical distribution cabinets for parts assigned to public lighting.
• Each distribution cabinet for lighting receives three-phase electrical current as input and supplies a series of low-voltage single-phase power lines. Each of these lines supplies a plurality of successive candelabras equipped in accordance with the device according to the invention.
• this electrical network is complex and includes several transformer stations each connected to a plurality of electrical cabinets, the power lines supplied by different transformer stations are isolated from each other from high frequency currents and cannot not communicate with each other by carrier current.
• the invention therefore more particularly aims to eliminate these drawbacks and to solve these problems by means of coupling devices specially designed to meet these safety requirements.
• an electromagnetic coupling device comprising two separate circuits which may alternately constitute a primary circuit and / or a secondary circuit, these two circuits being separated from each other by an electrically insulating material through which s 'performs the pairing.
• this device is characterized in that said insulating material is optically transparent so that the separation between the two circuits can be seen visually.
• said insulating material may consist of glass or of a transparent plastic material having two opposite parallel faces against which the two circuits of the coupling device are arranged.
• this coupling device may be of the electromagnetic type and comprise two windings (one per circuit) tuned to the frequency of the high or medium frequency signals to be transmitted.
• Each of these windings may be included in a high pass or band pass filter circuit, having a minimum impedance at the frequency of the above signals and a maximum impedance at the frequency of the alternating current of the lines to which this circuit is connected.
• FIG. 1 is a schematic representation of the architecture of an electricity distribution network equipped with a device for controlling and monitoring public lighting;
• Figure 2 is an electrical diagram of a coupling device
• Figure 3 is a schematic axial section of a first embodiment of the coupling device
• Figure 4 is a perspective view of this device
• Figure 5 is a schematic section of a second embodiment of the device.
• the network includes two independent electrical stations 1, 2 each for transforming the high voltage electricity they receive, into a low-voltage three-phase current (220 V). These stations 1, 2 are used to supply two sets of electrical distribution cabinets 6, 6 2 - 6' ⁇ , 6 ' 2 , some of which (for example cabinets 6 ⁇ and 6' 2 ) are used for public lighting.
• the cabinet 6 ⁇ receives the low-voltage three-phase current as an input, and supplies a set of power lines 7 with low single-phase voltage.
• Each of these lines 7 comprise two wires 15, 16 making it possible to supply a plurality of discharge lamps each associated with a control and monitoring device 10.
• This device 10 is designed to transmit and receive information by carrier current, in phase modulation, for example at a frequency of 132 KHz, via the lines 7 of the electrical distribution network, to communicate with a central station 3 connected here to the 'one of the lines of another electrical distribution cabinet 6' 2 which supplies electrical lines 17 independent of the lines 7.
• the central station 3 is equipped with a computer 5, connected to line 17, by the through an interface module 4.
• the invention aims in particular to allow communication between the central station 3 and the control and monitoring devices 10 associated with the discharge lamps supplied by the lines 7 and 17 connected to the distribution cabinets ⁇ and 6 ' 2 . To this end, it plans to carry out a coupling connecting the conductors 15, 16, of one of the lines 7 to the conductors of one of the lines 17 connected to the distribution cabinet 2.
• a coupler 18 shown diagrammatically in FIG. 1 by a quadrupole connected by two of its terminals h B 2 to the two conductors 15, 16, and by its two other terminals B 3 , B 4 to the conductors 20, 21 of line 17.
• this coupler involves two coils Ei, E 2 arranged opposite one another, each of these coils Ei, E 2 being connected to the two conductors 15, 16 - 20, 21 of the corresponding line via two connecting conductors and a filtering circuit comprising an inductance Li, L 2 / capacitor in series Ci, C and a capacitor in parallel C'i, C.
• This circuit constitutes, with the coil Ei, E 2 , a bandpass filter whose bandwidth is centered on the frequency of the signals exchanged between the central station and the lamp control and monitoring devices 10 (for example 130 KHz).
• each of the coils Ei, E 2 is produced by winding a conductive wire around a ferrite core Ni, N 2 .
• the two coils E 1? E 2 are oriented parallel to each other and are respectively mounted on two coaxial printed circuit discs D 1; D 2 centered pe ⁇ endicular to the coils E 1; E.
• Each of these printed circuits Di, D 2 carries the inductance and the two capacitors of the filtering circuit.
• the two discs of printed circuits Di, D 2 are housed in two tabular sleeves Mi, M 2 for example made of polyvinyl chloride (PVC) arranged coaxially opposite one another and separated from each other. one from the other by a thick washer R made of an electrically insulating transparent material.
• PVC polyvinyl chloride
• the volume delimited by the printed circuit D 1; D 2 and the tubular sleeve Mi, M 2 allows the passage of the connecting wires FLi, FL 2 .
• This volume can be filled with a coating material ensuring the tightness of the assembly.
• the coupling device has a cylindrical shape having two opaque portions Pi, P 2 each containing a respective coupling circuit. These two portions Pi, P 2 are separated by a transparent portion P 3 of larger diameter constituted by the washer R.
• the coils each comprise a winding E'i, E ' 2 produced around the central core of ferrite pots PFi, PF 2 of E-shaped section.
• the two ferrite pots PFi, PF 2 are arranged coaxially opposite one another on the side opposite their bottoms FDi, FD 2 , and are separated from each other by a disc made of transparent material DT.
• the assembly is obtained by bonding the radial faces of the two pots to the two opposite parallel faces of the disc.
• the invention is not limited to the control and monitoring of public lighting. It can be used in many carrier current circuits, in particular between transmitting and / or receiving stations and Electric power distribution lines used as transmission lines.

Landscapes

• Power Engineering (AREA)
• Engineering & Computer Science (AREA)
• Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
• Cable Accessories (AREA)
• Distribution Board (AREA)
• Circuit Arrangement For Electric Light Sources In General (AREA)
• Farming Of Fish And Shellfish (AREA)
• Soil Working Implements (AREA)
• Burglar Alarm Systems (AREA)
• Coils Or Transformers For Communication (AREA)
• Constitution Of High-Frequency Heating (AREA)
• Processing Of Terminals (AREA)
• Breakers (AREA)
• Insulating Bodies (AREA)
• Arrangements For Transmission Of Measured Signals (AREA)
• Control Of Motors That Do Not Use Commutators (AREA)
• Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Priority Applications (10)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8846772

Family Applications (1)

Country Status (17)

Families Citing this family (1)

Citations (4)

• 2000
  • 2000-02-07 FR FR0001558A patent/FR2804789B1/fr not_active Expired - Fee Related
• 2001
  • 2001-02-05 RU RU2002123874/09A patent/RU2002123874A/ru not_active Application Discontinuation
  • 2001-02-05 AT AT01904051T patent/ATE464644T1/de active
  • 2001-02-05 CN CN01804611.8A patent/CN1398415A/zh active Pending
  • 2001-02-05 DE DE60141812T patent/DE60141812D1/de not_active Expired - Lifetime
  • 2001-02-05 EP EP01904051A patent/EP1254465B1/de not_active Expired - Lifetime
  • 2001-02-05 ES ES01904051T patent/ES2344586T3/es not_active Expired - Lifetime
  • 2001-02-05 AU AU31976/01A patent/AU3197601A/en not_active Abandoned
  • 2001-02-05 CA CA002399168A patent/CA2399168A1/fr not_active Abandoned
  • 2001-02-05 WO PCT/FR2001/000335 patent/WO2001057891A1/fr active Application Filing
  • 2001-02-05 PT PT01904051T patent/PT1254465E/pt unknown
  • 2001-02-05 PL PL357303A patent/PL198157B1/pl unknown
  • 2001-02-05 DK DK01904051.8T patent/DK1254465T3/da active
  • 2001-02-05 BR BR0107988-3A patent/BR0107988A/pt not_active IP Right Cessation
• 2002
  • 2002-07-31 IL IL151002A patent/IL151002A/en not_active IP Right Cessation
• 2003
  • 2003-05-14 HK HK03103068.8A patent/HK1051257A1/xx not_active IP Right Cessation
• 2010
  • 2010-07-06 CY CY20101100626T patent/CY1110175T1/el unknown

Patent Citations (4)

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