EP0330658A1 - Convertisseur de chaleur pour generateur de rayons x - Google Patents

Convertisseur de chaleur pour generateur de rayons x

Info

Publication number
EP0330658A1
EP0330658A1 EP19870906733 EP87906733A EP0330658A1 EP 0330658 A1 EP0330658 A1 EP 0330658A1 EP 19870906733 EP19870906733 EP 19870906733 EP 87906733 A EP87906733 A EP 87906733A EP 0330658 A1 EP0330658 A1 EP 0330658A1
Authority
EP
European Patent Office
Prior art keywords
heating
shells
winding
ferrite core
ray generator
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.)
Ceased
Application number
EP19870906733
Other languages
German (de)
English (en)
Inventor
Günter Menge
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.)
General Electric CGR Deutschland GmbH and Co KG
Original Assignee
General Electric CGR Deutschland GmbH and Co KG
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 General Electric CGR Deutschland GmbH and Co KG filed Critical General Electric CGR Deutschland GmbH and Co KG
Publication of EP0330658A1 publication Critical patent/EP0330658A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05G—X-RAY TECHNIQUE
    • H05G1/00—X-ray apparatus involving X-ray tubes; Circuits therefor
    • H05G1/08—Electrical details
    • H05G1/26—Measuring, controlling or protecting
    • H05G1/30—Controlling
    • H05G1/34—Anode current, heater current or heater voltage of X-ray tube
    • 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
    • H01F27/02—Casings
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05G—X-RAY TECHNIQUE
    • H05G1/00—X-ray apparatus involving X-ray tubes; Circuits therefor
    • H05G1/02—Constructional details

Definitions

  • the heating transducer generates a heating voltage in the range of approx. 3.5 V - 25 V and causes the electrons to be freed by electrical heating of the heating coil of the cathode of the X-ray tube.
  • the tube heating can be regulated in order to change the X-ray current in the X-ray tube; transformers are usually used here which are made up of cut tape cores. Due to their mechanical structure, these transformers have relatively large geometric dimensions. Another disadvantage is that they cannot be strung together in the event that several tubes or a multi-focus tubes are to be connected.
  • the cutting tape cores compared to the ferrite cores used is that the cutting tape core has a square or rectangular cross section and thus there is no close connection to the winding.
  • cores normally layered from individual sheets are also used Heat converters their application. The same disadvantages are to be mentioned here as with the cutting tape cores.
  • these heating transducers are usually only operated at a frequency of 50 Hz.
  • the high frequency inverter technology enables the construction of small heating converters due to the high frequencies, which can reach up to 100 kHz, and suitable insulation materials.
  • a heating converter for the operation of X-ray tubes has become known with the utility model GM 78 21 220. This heating converter is also fed by an inverter.
  • the constructive design of the Isolierstoffk ⁇ rper should avoid the occurrence of leakage currents and flashovers between the secondary winding and the core. This is achieved in that the secondary winding is arranged in an insulating body which is enclosed on all sides by a cap. Because the X-ray tubes are operated with different outputs, the heating transducers also vary in their output and therefore also in the level of the potential to earth, in contrast to an operating voltage transformer. The consequence of this is that special requirements must be placed on the insulating material.
  • Polypropylene a highly insulating plastic, fulfills all the requirements that are necessary To build up the heat converter in the smallest possible space. Further advantages and features of the inventive subject matter are explained in more detail with the aid of the exemplary embodiments shown more or less schematically in the drawings and described below.
  • the primary winding (2) is located on a polypropylene coil body (1), which is rounded at the ends.
  • the primary winding is covered by an insulating layer (3).
  • the screen winding (4) which is crimped over the rounded ends of the bobbin (1), forms the safe end.
  • the shield winding (4) is not short-circuited in itself, but has a finite opening (8) opposite the connection (5). Notches (7) are located on each side of the shield winding (4), which ensure reliable derivation of the connections (5) and do not cause any protruding edges at the opening (8).
  • the electrical connection (6) of the shield winding (4) is attached to one end.
  • the coil former (9) of the secondary winding (10) is also made of polypropylene and securely embeds the secondary winding (10) against rollovers on all sides with the minimum wall thickness.
  • the cover ring (11) is pushed over the coil former (9).
  • This cover ring (11) made of polypropylene is designed in such a way that the outer surface is conical from the center to the sides.
  • the insulation half-shells (13) are on the inner surface. (14) oppositely conical.
  • the assembly takes place in the following steps: The primary winding and the secondary winding are prefabricated.
  • the secondary winding (10) provided with the cover ring (11) is pressed into the lower insulation half-shell (13) with the aid of a tool.
  • connection (12) are exactly on the bushing (15).
  • the axially led out connections (5, 6) of the primary winding are now inserted centrally into the secondary winding.
  • the connection is formed by the second insulation half-shell (13), which is also pressed onto the protruding second half of the secondary winding using a tool.
  • the fact that the outer inner surfaces (14) run conically in the opposite direction to the cover ring (11) results in a quasi-homogeneous connection between the cover ring and the insulation half-shells after assembly.
  • the connections (5) of the primary winding and the shield winding (4) are screwed onto the outer surfaces.
  • the conclusion is the assembly of the ferrite core (19), which consists of two halves.
  • the ferrite core (19) is completely enclosed by the two insulation half-shells (13).
  • the insulation half-shells (13) have a hole in their central center through which one leg of the U-shaped ferrite core half passes. This leg is enclosed by the coil former (1) of the primary winding, which in turn is mechanically supported against the stop (17) and is thus fixed against slipping.
  • the second leg of the U-shaped ferrite core half (19) lies in the indentation (21). Through this indentation
  • this constructive measure ensures that the heat converter is significantly smaller in its mechanical dimensions than known heat converters in the version with a cutting band core.
  • the heating converter delivers just as great a power as heating converters with cutting tape cores.
  • the use of a ferrite core with a circular cross section also provides a close magnetic coupling to the primary and secondary windings.
  • the two ferrite core halves are glued together on their abutting surfaces with suitable adhesive. This is necessary so that even the smallest displacements of the two ferrite core halves cannot cause an inadmissible change in induction in the event of a strong impact load.
  • FIG. 1 seen primary and shield winding with connections from above

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • X-Ray Techniques (AREA)

Abstract

Le convertisseur de chaleur décrit est d'une configuration extrêmement petite et peut être alimenté avec 125 kV. Sa conception rend superflue toute isolation supplémentaire et plusieurs convertisseurs sont empilables pour former un module sans modifications techniques nécessaires. Les raccordements des enroulements primaire et isolant (5, 6) sont situés sur le côté opposé de l'enroulement secondaire (12) qui se trouve à un potentiel haute tension. On utilise comme matériau de noyau un tore de ferrite de section arrondie.
EP19870906733 1986-10-30 1987-10-17 Convertisseur de chaleur pour generateur de rayons x Ceased EP0330658A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3636938 1986-10-30
DE19863636938 DE3636938A1 (de) 1986-10-30 1986-10-30 Heizwandler fuer einen roentgengenerator

Publications (1)

Publication Number Publication Date
EP0330658A1 true EP0330658A1 (fr) 1989-09-06

Family

ID=6312809

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870906733 Ceased EP0330658A1 (fr) 1986-10-30 1987-10-17 Convertisseur de chaleur pour generateur de rayons x

Country Status (4)

Country Link
EP (1) EP0330658A1 (fr)
JP (1) JPH02501016A (fr)
DE (1) DE3636938A1 (fr)
WO (1) WO1988003355A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2646549B1 (fr) * 1989-04-28 1993-01-08 Marchal Equip Auto Dispositif de fixation d'une bobine d'allumage, en particulier pour moteur a combustion interne de vehicule automobile
US7495539B2 (en) * 2006-10-02 2009-02-24 General Electric Company Filament transformer for X-ray tubes

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7821220U1 (de) * 1979-12-20 Siemens Ag, 1000 Berlin Und 8000 Muenchen Heiztransformator für einen Röntgengenerator
GB910420A (en) * 1960-02-08 1962-11-14 Gen Electric Co Ltd Improvements in or relating to radiographic apparatus
US3070766A (en) * 1961-03-20 1962-12-25 Ransburg Electro Coating Corp Coil casing comprising interconnecting shells
DE2208001A1 (de) * 1972-02-21 1973-09-06 Hohenloher Spulenkoerper Spulenkoerper
US4334206A (en) * 1979-08-23 1982-06-08 Sanyo Electric Co., Ltd. Ferrite core type transformer
US4317040A (en) * 1980-07-14 1982-02-23 Pennwalt Corporation Low ripple regulated X-ray tube power supply filament transformer
EP0149337A3 (fr) * 1984-01-16 1986-06-04 Picker International, Inc. Appareil de production de rayons X et procédé pour la mise en marche d'un tube à rayons X

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8803355A1 *

Also Published As

Publication number Publication date
WO1988003355A1 (fr) 1988-05-05
DE3636938C2 (fr) 1988-10-20
JPH02501016A (ja) 1990-04-05
DE3636938A1 (de) 1988-05-11

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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17P Request for examination filed

Effective date: 19890425

AK Designated contracting states

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Designated state(s): DE FR GB IT NL

17Q First examination report despatched

Effective date: 19910807

STAA Information on the status of an ep patent application or granted ep patent

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18R Application refused

Effective date: 19920203