EP0356294A1 - Verfahren zur Reduzierung der Störsignale zwischen mindestens zwei untereinander verbundenen Einzelteilen - Google Patents

Verfahren zur Reduzierung der Störsignale zwischen mindestens zwei untereinander verbundenen Einzelteilen Download PDF

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Publication number
EP0356294A1
EP0356294A1 EP89402225A EP89402225A EP0356294A1 EP 0356294 A1 EP0356294 A1 EP 0356294A1 EP 89402225 A EP89402225 A EP 89402225A EP 89402225 A EP89402225 A EP 89402225A EP 0356294 A1 EP0356294 A1 EP 0356294A1
Authority
EP
European Patent Office
Prior art keywords
energy
intermediate energy
transformer
electrical energy
distribution network
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP89402225A
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English (en)
French (fr)
Inventor
André Dupuis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0356294A1 publication Critical patent/EP0356294A1/de
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H01F27/363—Electric or magnetic shields or screens made of electrically conductive material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F19/00—Fixed transformers or mutual inductances of the signal type
    • H01F19/04—Transformers or mutual inductances suitable for handling frequencies considerably beyond the audio range
    • H01F19/08—Transformers having magnetic bias, e.g. for handling pulses
    • H01F2019/085—Transformer for galvanic isolation

Definitions

  • the invention relates to a method for reducing the disturbing signals which are superimposed on the signals exchanged between at least two interconnected elements subjected via their respective supply transformers to a common supply.
  • the invention also relates to the means for implementing the method.
  • the invention relates to such a method intended to be applied in the field of so-called high fidelity sound reproduction.
  • the various elements connected directly to the distribution network, consist for example of an analog or digital disc player, a preamplifier, a power amplifier and d '' conventional or even electrostatic type enclosures.
  • connection cords capable of limiting faults.
  • the invention aims to remedy these drawbacks and proposes a method for reducing the presence of disturbing signals useful signals exchanged between at least two interconnected elements and more particularly a method which, applied to the field of sound reproduction called high fidelity makes it possible to get rid almost totally of said disturbing signals and consequently promotes musical listening of optimum quality.
  • the subject of the invention is a method of the aforementioned type, characterized in that, instead of directly connecting the various elements to the distribution network: at least one first means of transforming the electrical energy of the network into an intermediate energy is connected to the network, this first transformation is carried out, this intermediate energy is transferred to at least one second means for transforming this intermediate energy into secondary electrical energy then, - in this second means, this second transformation is carried out, - During at least one of these stages, any electrical coupling other than by intermediate energy is eliminated between said means and the various elements are supplied with this secondary electrical energy.
  • the invention also relates to the means for implementing the method.
  • these elements consist of an analog or digital disc player 1, a preamplifier 2, a power amplifier 3 and speakers 4 of conventional or even electrostatic types.
  • each of these elements comprises a supply transformer 5 as well as a rectifier 6 such as a full-wave rectifier in order to respectively lower and then rectify the voltage of the distribution network 7 into one or more direct voltages which supply the or the electronic circuits 8 specific to said elements.
  • a rectifier 6 such as a full-wave rectifier in order to respectively lower and then rectify the voltage of the distribution network 7 into one or more direct voltages which supply the or the electronic circuits 8 specific to said elements.
  • the intermediate energy is transformed so that the voltage characteristic of the secondary electrical energy obtained is substantially equal to that of the distribution network 7.
  • the means for implementing the method are characterized in that they include: at least one first means 13 for transforming the electrical energy of the distribution network into an intermediate energy, - At least a second means 14 for transforming this intermediate energy into secondary electrical energy. a means 15 for transferring this intermediate energy to at least a second means 14 for transforming this intermediate energy into secondary electrical energy, - Means eliminating between these means any electrical coupling other than by intermediate energy.
  • the impedance between them can be considered sufficiently large and therefore therefore, s 'adds to those of the power transformers 5 to further reduce stray currents.
  • the different means 13, 14, 15 are respectively produced by the parts 18, 19, 20 constituting a transformer 21, namely: - the primary winding 18, - the magnetic circuit 19, - the secondary winding 20, and this transformer is designed so as to reduce the parasitic capacitance C ′ which may appear between the primary 18 and secondary 20 and thereby increase the impedance.
  • the primary winding 18 transforms electrical energy from the network 7 into magnetic energy in the form of a flux which the magnetic circuit 19 channels towards the secondary winding 20 which transforms this magnetic energy into l 'electric energy.
  • this transformer is of ratio 1.
  • the primary winding 18 is protected, both on its first layer of turns 22 or 23 and on its last layer of turns, by a screen 24 made of non-magnetic and conductive material such as copper connected to neutral and, - that of the first and last layers of turns of the primary winding 18 which is closest to the secondary winding 20 has its first turn connected to the neutral 25 of the distribution network 7.
  • the secondary winding 20 is protected from the influence of the tension existing on the primary winding 18 since, since the screen 24 is connected to the neutral 25, the layer of turns 22 or 23 which , although connected to neutral 25, has a certain potential due to the number of turns per volt of transformer 21, can only be discharged in screen 24.
  • this screen is separated from this layer by an electrically insulating means, such as for example a insulation and / or a sufficient distance to avoid any risk of breakdown between them.
  • the means of the invention constitute a transformer 21
  • this can either be located at the head of the transformer 5 or be integrated into the element or replace the transformer integrated into the element, in which case the reduction ratio must be chosen according to the operating characteristics of the element's electronic circuits.
  • the means for implementing the method can also consist for example of a generator motor group coupled by a control shaft, of a laser-photovoltaic device coupling, etc.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Coils Or Transformers For Communication (AREA)
EP89402225A 1988-08-24 1989-08-04 Verfahren zur Reduzierung der Störsignale zwischen mindestens zwei untereinander verbundenen Einzelteilen Withdrawn EP0356294A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8811547A FR2635932B1 (fr) 1988-08-24 1988-08-24 Procede en vue de reduire les signaux perturbateurs entre au moins deux elements interconnectes
FR8811547 1988-08-24

Publications (1)

Publication Number Publication Date
EP0356294A1 true EP0356294A1 (de) 1990-02-28

Family

ID=9369687

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89402225A Withdrawn EP0356294A1 (de) 1988-08-24 1989-08-04 Verfahren zur Reduzierung der Störsignale zwischen mindestens zwei untereinander verbundenen Einzelteilen

Country Status (2)

Country Link
EP (1) EP0356294A1 (de)
FR (1) FR2635932B1 (de)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4484171A (en) * 1983-02-18 1984-11-20 Mcloughlin Robert C Shielded transformer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4484171A (en) * 1983-02-18 1984-11-20 Mcloughlin Robert C Shielded transformer

Also Published As

Publication number Publication date
FR2635932B1 (fr) 1990-10-26
FR2635932A1 (fr) 1990-03-02

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