EP0421062A1 - Flat coil - Google Patents

Flat coil Download PDF

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Publication number
EP0421062A1
EP0421062A1 EP90113442A EP90113442A EP0421062A1 EP 0421062 A1 EP0421062 A1 EP 0421062A1 EP 90113442 A EP90113442 A EP 90113442A EP 90113442 A EP90113442 A EP 90113442A EP 0421062 A1 EP0421062 A1 EP 0421062A1
Authority
EP
European Patent Office
Prior art keywords
coil
wires
winding
flat coil
per turn
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.)
Granted
Application number
EP90113442A
Other languages
German (de)
French (fr)
Other versions
EP0421062B1 (en
Inventor
Klaus Dipl.-Ing. Böhm
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.)
Dornier Medizintechnik GmbH
Original Assignee
Dornier Medizintechnik GmbH
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 Dornier Medizintechnik GmbH filed Critical Dornier Medizintechnik GmbH
Publication of EP0421062A1 publication Critical patent/EP0421062A1/en
Application granted granted Critical
Publication of EP0421062B1 publication Critical patent/EP0421062B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01F5/00—Coils
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated

Definitions

  • the invention relates to a coil for a device for the contactless smashing of concrements located in the body of living beings with a shock wave generator, which is aligned in the target area in the body and which has the coil lying in one surface, in front of which there is a membrane with one Closes liquid-filled space and generates a shock wave when the coil is briefly switched on to a high voltage.
  • such a device is described as a shock wave tube, which has a coil carrier made of ceramic.
  • a single-wound flat coil is glued to the front using a synthetic resin.
  • An insulating film is placed as an intermediate layer between the flat coil and a membrane. Flat coil, insulating film and membrane are pressed close together.
  • the coil used is wound in a single spiral and the embedding in the synthetic resin gives the coil an additional distance from its wire outer surfaces to the membrane.
  • a short electrical voltage pulse of high amplitude is applied to the flat coil, whereby energy stored in a capacitor discharges into the coil.
  • the electromagnetic field generated in this way causes an applied metal membrane to move suddenly away from the flat coil and trigger a shock wave.
  • An insulating film between the coil and membrane prevents voltage flashovers.
  • shock wave pressure maximization is achieved, inter alia, in that the distance between the coil and membrane is as small as possible and the amplitude of the current pulse is as large as possible.
  • the object of the invention is to provide a flat coil for devices for generating shock waves with which higher pressures are achieved.
  • the invention proposes to use a two-wire or multi-wire coil with the same number of turns.
  • the wires wound in parallel count as one winding. Due to the smaller diameter of the wires, the volumes between two wires and the insulation layer and thus the membrane attached to it become smaller. With a constant current pulse, a reduction in these volumes causes an increase in the shock wave pressure, since the pressure is inversely proportional to this volume.
  • the radius of the wires used is preferably equal to 1 / n times the original radius of the single-wire coil, where n indicates the number of wires per winding.
  • the radius of the wires of the multi-wire winding is advantageously chosen to be half the size of the radius of the single-wire winding and two wires are used.
  • a multi-wire winding also results in a reduction in the inductance of the coil, which results in an increase in the current amplitude.
  • Figure 1 shows a single-wire coil according to the prior art with a diameter D1 and the number of individual turns n1.
  • a section through the wires is sketched in the lower part of the figure.
  • Figure 2 shows a two-wire coil with a diameter D2 and the number of double turns n2.
  • Figure 3a shows a section through the solid coil with d1 as the diameter of the wires and V1 as the volume between two wires and the insulation cut 2, which bears directly on the membrane 4.
  • Figure 3b shows a section through the two-wire coil with d2 as Diameter of the wires and V2 as a volume between two wires and the insulation layer 2, which is also applied directly to the membrane 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Surgical Instruments (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

A flat coil for a device for the contact-free disintegration of concretions in the bodies of living organisms with the aid of shock waves in a fluid, having a coil former, a metallic diaphragm arranged in front of the coil, and insulation between the coil and diaphragm. The winding of the coil is constructed from a number of wires while maintaining the number of turns, the individual wires per turn being parallel and the diameter of the wires being reduced with respect to a single wire turn in accordance with the number of wires per turn. …<IMAGE>…

Description

Die Erfindung betrifft eine Spule für eine Vorrichtung zum berührungslo­sen Zertrümmern von im Körper von Lebewesen befindlichen Konkremen­ten mit einem Stoßwellengenerator, der aus in Zielgebiet im Körper aus­gerichtet ist und der die in einer Fläche liegende Spule aufweist, vor der eine Membran liegt, die einen mit einer Flüssigkeit gefüllten Raum ab­schließt und darin beim kurzzeitigen Anschalten der Spule an eine Hoch­spannung eine Stoßwelle erzeugt.The invention relates to a coil for a device for the contactless smashing of concrements located in the body of living beings with a shock wave generator, which is aligned in the target area in the body and which has the coil lying in one surface, in front of which there is a membrane with one Closes liquid-filled space and generates a shock wave when the coil is briefly switched on to a high voltage.

In der Europäischen Patentanmeldung EP 0 275 427 ist eine derartige Ein­richtung als Stoßwellenrohr beschrieben, das einen Spulenträger aus Kera­mik aufweist. Auf der Stirnseite ist eine eindrähtig gewickelte Flachspule mit Hilfe eines Kunstharzes aufgeklebt. Zwischen der Flachspule und einer Membran ist eine Isolierfolie als Zwischenlage gelegt. Flachspule, Isolierfolie und Membran liegen eng aneinandergepreßt.In European patent application EP 0 275 427, such a device is described as a shock wave tube, which has a coil carrier made of ceramic. A single-wound flat coil is glued to the front using a synthetic resin. An insulating film is placed as an intermediate layer between the flat coil and a membrane. Flat coil, insulating film and membrane are pressed close together.

Die dabei verwendete Spule ist eindrähtig spiralförmig gewickelt und durch die Einbettung in das Kunstharz erfährt die Spule einen zusätzlichen Abstand ihrer Drahtaußenflächen zur Membran.The coil used is wound in a single spiral and the embedding in the synthetic resin gives the coil an additional distance from its wire outer surfaces to the membrane.

Bei der elektromagnetischen Stoßwellenerzeugung wird auf die Flachspule ein kurzer elektrischer Spannungsimpuls von hoher Amplitude gegeben, wobei sich in einem Kondensator gespeicherte Energie in die Spule ent­lädt. Das so erzeugte elektromagnetische Feld bewirkt, daß sich eine an­gelegte Metallmembran schlagartig von der Flachspule wegbewegt und eine Stoßwelle auslöst. Eine Isolierfolie zwischen Spule und Membran verhindert Spannungsüberschläge.When generating electromagnetic shock waves, a short electrical voltage pulse of high amplitude is applied to the flat coil, whereby energy stored in a capacitor discharges into the coil. The electromagnetic field generated in this way causes an applied metal membrane to move suddenly away from the flat coil and trigger a shock wave. An insulating film between the coil and membrane prevents voltage flashovers.

Für die Stoßwelle wird eine Druckmaximierung unter anderem dadurch erreicht, daß der Abstand zwischen Spule und Membran möglichst gering ist und die Amplitude des Stromimpulses möglichst groß ist.For the shock wave, pressure maximization is achieved, inter alia, in that the distance between the coil and membrane is as small as possible and the amplitude of the current pulse is as large as possible.

Aufgabe der Erfindung ist es, eine Flachspule für Einrichtungen zur Er­zeugung von Stoßwellen anzugeben, mit der höhere Drucke erreicht werden.The object of the invention is to provide a flat coil for devices for generating shock waves with which higher pressures are achieved.

Die Aufgabe wird durch die Erfindung mit den Merkmalen des Anspruchs 1 gelöst. Ausgestaltungen sind Gegenstand von Unteransprüchen.The object is achieved by the invention with the features of claim 1. Refinements are the subject of subclaims.

Statt einer eindrähtigen Windung der Flachspule wird erfindungsgemäß vorgeschlagen, eine zwei- oder mehrdrähtige Spule mit gleicher Win­dungszahl zu verwenden. Die parallel gewickelten Drähte zählen bei mehrdrähtigen Wicklungen als eine Wicklung. Durch den kleineren Durchmesser der Drähte werden die Volumina zwischen jeweils zwei Drähten und der Isolationsschicht und damit der daran anliegenden Membran geringer.
Bei konstantem Stromimpuls bewirkt eine Verminderung dieser Volu­mina eine Steigerung des Stoßwellendrucks, da der Druck umgekehrt proportional zu diesem Volumen ist.
Der Radius der verwendeten Drähte ist bevorzugt gleich dem 1/n-fachen des ursprünglichen Radius der Eindrahtspule, wobei n die Anzahl der Drähte je Wicklung angibt.Instead of a single-turn winding of the flat coil, the invention proposes to use a two-wire or multi-wire coil with the same number of turns. In the case of multi-wire windings, the wires wound in parallel count as one winding. Due to the smaller diameter of the wires, the volumes between two wires and the insulation layer and thus the membrane attached to it become smaller.
With a constant current pulse, a reduction in these volumes causes an increase in the shock wave pressure, since the pressure is inversely proportional to this volume.
The radius of the wires used is preferably equal to 1 / n times the original radius of the single-wire coil, where n indicates the number of wires per winding.

Vorteilhafterweise wird der Radius der Drähte der Mehrdrahtwicklung halb so groß gewählt wie der Radius der Eindrahtwicklung und zwei Drähte verwendet.The radius of the wires of the multi-wire winding is advantageously chosen to be half the size of the radius of the single-wire winding and two wires are used.

Eine mehrdrähtige Wicklung ergibt auch eine Verringerung der Indukti­vität der Spule, was eine Zunahme der Stromamplitude zur Folge hat.A multi-wire winding also results in a reduction in the inductance of the coil, which results in an increase in the current amplitude.

Die Erfindung wird durch Figuren näher erläutert.The invention is illustrated by figures.

Es zeigen:

  • Figur 1 eine skizzierte Draufsicht auf eine eindrähtige Spule nach dem Stand der Technik,
  • Figure 2 eine skizzierte Draufsicht auf eine zweidrähtige Spule,
  • Figure 3 Schnitte durch beide Spulenarten.
Show it:
  • FIG. 1 shows a sketched top view of a single-wire coil according to the prior art,
  • Figure 2 is a sketched top view of a two-wire coil,
  • Figure 3 Cuts through both types of coils.

Die Figur 1 zeigt eine eindrähtige Spule nach dem Stand der Technik mit einem Durchmesser D₁ und der Anzahl der Einzelwindungen n₁. Neben der Darstellung in Draufsicht ist im unteren Teil der Figur ein Schnitt durch die Drähte skizziert.Figure 1 shows a single-wire coil according to the prior art with a diameter D₁ and the number of individual turns n₁. In addition to the top view, a section through the wires is sketched in the lower part of the figure.

Die Figur 2 zeigt eine zweidrähtige Spule mit einem Durchmesser D₂ und der Anzahl der Doppelwindungen n₂. Der Spulendurchmesser ist bei ein- und mehrdrähtigen Spulen unverändert und durch die Einbaubedingungen bestimmt (D₁=D₂). Ebenso ist die Anzahl der Windungen gleich (n₁=n₂).Figure 2 shows a two-wire coil with a diameter D₂ and the number of double turns n₂. The coil diameter is unchanged for single and multi-wire coils and determined by the installation conditions (D₁ = D₂). Likewise, the number of turns is the same (n₁ = n₂).

Die Figur 3a zeigt einen Schnitt durch die eindrähtige Spule mit d₁ als Durchmesser der Drähte und V₁ als Volumen zwischen je zwei Drähten und der Isolationsschnit 2, die unmittelbar an der Membran 4 anliegt.Figure 3a shows a section through the solid coil with d₁ as the diameter of the wires and V₁ as the volume between two wires and the insulation cut 2, which bears directly on the membrane 4.

Die Figur 3b zeigt einen Schnitt durch die zweidrähtige Spule mit d₂ als Durchmesser der Drähte und V₂ als Volumen zwischen je zwei Drähten und der Isolationsschicht 2, die ebenfalls unmittelbar an der Membran 4 anliegt.Figure 3b shows a section through the two-wire coil with d₂ as Diameter of the wires and V₂ as a volume between two wires and the insulation layer 2, which is also applied directly to the membrane 4.

Claims (3)

1. Flachspule, insbesondere für eine Vorrichtung zum berührungslosen Zertrümmern von in Körpern von Lebewesen sich befindenden Kon­krementen mit Hilfe von Stoßwellen in einer Flüssigkeit mit einem Spulenträger, einer vor der Spule angeordneten metallischen Mem­bran und einer Isolation zwischen Spule und Membran, dadurch gekennzeichnet, daß die Wicklung der Spule unter Einhaltung der Windungszahl mehrdrähtig ausgebildet ist, wobei einzelnen Drähte je Windung parallel gewickelt sind.1. Flat coil, in particular for a device for contactless smashing of concrements located in bodies of living beings with the aid of shock waves in a liquid with a coil support, a metallic membrane arranged in front of the coil and insulation between the coil and membrane, characterized in that the Winding of the coil is multi-stranded in compliance with the number of turns, with individual wires are wound in parallel per turn. 2. Flachspule nach Anspruch 1, dadurch gekennzeichnet, daß die Wicklung der Spule mit zwei Drähten je Windung ausgebildet ist.2. Flat coil according to claim 1, characterized in that the winding of the coil is formed with two wires per turn. 3. Flachspule nach Anspruch 1, dadurch gekennzeichnet, daß die Wicklung der Spule mit drei Drähten je Windung ausgebildet ist.3. Flat coil according to claim 1, characterized in that the winding of the coil is formed with three wires per turn.
EP90113442A 1989-09-30 1990-07-13 Flat coil Expired - Lifetime EP0421062B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3932745A DE3932745A1 (en) 1989-09-30 1989-09-30 FLAT REEL
DE3932745 1989-09-30

Publications (2)

Publication Number Publication Date
EP0421062A1 true EP0421062A1 (en) 1991-04-10
EP0421062B1 EP0421062B1 (en) 1994-12-28

Family

ID=6390600

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90113442A Expired - Lifetime EP0421062B1 (en) 1989-09-30 1990-07-13 Flat coil

Country Status (5)

Country Link
US (1) US5137014A (en)
EP (1) EP0421062B1 (en)
JP (1) JPH03125410A (en)
DE (2) DE3932745A1 (en)
ES (1) ES2068951T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5191560A (en) * 1990-10-12 1993-03-02 Dornier Medizintechnik Gmbh Sound wave generator for therapeutic purposes

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4118306A1 (en) * 1991-06-04 1992-12-10 Siemens Ag Flat-coil electromagnetic source of acoustic shock waves e.g. for medical use - has flat wire wound on-edge under conductive diaphragm and excited by high voltage generator
DE4123160C1 (en) * 1991-07-12 1992-09-17 Siemens Ag, 8000 Muenchen, De
DE4201138A1 (en) * 1992-01-17 1993-07-22 Siemens Ag Mfr. of coil arrangement for electromagnetic acoustic pressure pulse generator - involves attaching coil to carrier surface by pressing into adhesive film under temp. and then allowing to set
DE4228963C2 (en) * 1992-08-31 1998-10-22 Siemens Ag Pressure pulse source with a cavitation-resistant coated membrane
US7189209B1 (en) * 1996-03-29 2007-03-13 Sanuwave, Inc. Method for using acoustic shock waves in the treatment of a diabetic foot ulcer or a pressure sore
US6390995B1 (en) 1997-02-12 2002-05-21 Healthtronics Surgical Services, Inc. Method for using acoustic shock waves in the treatment of medical conditions
US8979776B2 (en) * 2008-05-02 2015-03-17 Daniel Gelbart Lithotripsy system with automatic 3D tracking
US20220072326A1 (en) * 2020-09-10 2022-03-10 Moshe Ein-Gal Combined pulsed electromagnetic field and low intensity shockwave system and method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2648837A (en) * 1952-03-10 1953-08-11 Standard Oil Dev Co Pulsed sound system
FR2332601A1 (en) * 1975-11-19 1977-06-17 Leroy Maurice COIL FOR INTENSE MAGNETIC FIELDS
DE8521196U1 (en) * 1985-07-23 1985-08-29 Eisenmenger, Wolfgang, Prof. Dr., 7140 Ludwigsburg Membrane-coil arrangement of electromagnetic devices for the contact-free crushing of calculus in the body of living beings
DE8709692U1 (en) * 1986-07-14 1987-09-24 Siemens AG, 1000 Berlin und 8000 München Shock wave generator for a device for the contactless destruction of concretions in the body of a living being
FR2605173A1 (en) * 1986-10-09 1988-04-15 Wolf Gmbh Richard ELECTROMAGNETIC TRANSDUCER, ESPECIALLY ACOUSTIC TRANSMITTER FOR MEDICAL PURPOSES

Family Cites Families (7)

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Publication number Priority date Publication date Assignee Title
CH128861A (en) * 1926-08-18 1928-11-16 Aeg Symmetrical winding, especially for transformer and relay coils.
JPS57187523A (en) * 1981-05-15 1982-11-18 Mitsubishi Heavy Ind Ltd Reheating method of treated gas in flue gas desulfurization
JPS60239011A (en) * 1984-05-11 1985-11-27 Furukawa Electric Co Ltd:The Manufacture of coil
EP0209053A3 (en) * 1985-07-18 1987-09-02 Wolfgang Prof. Dr. Eisenmenger Method and apparatus for the non-contacting disintegration of concretions in a living body
EP0263349A1 (en) * 1986-10-06 1988-04-13 Siemens Aktiengesellschaft Shock wave generator
EP0275427B1 (en) * 1986-12-15 1991-09-11 Siemens Aktiengesellschaft Shock wave discharge tube
DE8709363U1 (en) * 1987-07-07 1988-11-03 Siemens AG, 1000 Berlin und 8000 München Shock wave source

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2648837A (en) * 1952-03-10 1953-08-11 Standard Oil Dev Co Pulsed sound system
FR2332601A1 (en) * 1975-11-19 1977-06-17 Leroy Maurice COIL FOR INTENSE MAGNETIC FIELDS
DE8521196U1 (en) * 1985-07-23 1985-08-29 Eisenmenger, Wolfgang, Prof. Dr., 7140 Ludwigsburg Membrane-coil arrangement of electromagnetic devices for the contact-free crushing of calculus in the body of living beings
DE8709692U1 (en) * 1986-07-14 1987-09-24 Siemens AG, 1000 Berlin und 8000 München Shock wave generator for a device for the contactless destruction of concretions in the body of a living being
FR2605173A1 (en) * 1986-10-09 1988-04-15 Wolf Gmbh Richard ELECTROMAGNETIC TRANSDUCER, ESPECIALLY ACOUSTIC TRANSMITTER FOR MEDICAL PURPOSES

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5191560A (en) * 1990-10-12 1993-03-02 Dornier Medizintechnik Gmbh Sound wave generator for therapeutic purposes

Also Published As

Publication number Publication date
JPH03125410A (en) 1991-05-28
DE3932745A1 (en) 1991-04-18
DE59008128D1 (en) 1995-02-09
ES2068951T3 (en) 1995-05-01
EP0421062B1 (en) 1994-12-28
US5137014A (en) 1992-08-11

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