EP0612096A1 - Entraînement pour anode tournante - Google Patents

Entraînement pour anode tournante Download PDF

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Publication number
EP0612096A1
EP0612096A1 EP94200323A EP94200323A EP0612096A1 EP 0612096 A1 EP0612096 A1 EP 0612096A1 EP 94200323 A EP94200323 A EP 94200323A EP 94200323 A EP94200323 A EP 94200323A EP 0612096 A1 EP0612096 A1 EP 0612096A1
Authority
EP
European Patent Office
Prior art keywords
rotor
drive device
stator
motor
drive
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
EP94200323A
Other languages
German (de)
English (en)
Other versions
EP0612096B1 (fr
Inventor
Dieter C/O Philips Patentverwalt. Gmbh Gerling
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.)
Philips Intellectual Property and Standards GmbH
Koninklijke Philips NV
Original Assignee
Philips Patentverwaltung GmbH
Koninklijke Philips Electronics NV
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 Philips Patentverwaltung GmbH, Koninklijke Philips Electronics NV filed Critical Philips Patentverwaltung GmbH
Publication of EP0612096A1 publication Critical patent/EP0612096A1/fr
Application granted granted Critical
Publication of EP0612096B1 publication Critical patent/EP0612096B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H05G1/66—Circuit arrangements for X-ray tubes with target movable relatively to the anode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J35/00—X-ray tubes
    • H01J35/02—Details
    • H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
    • H01J35/08—Anodes; Anti cathodes
    • H01J35/10—Rotary anodes; Arrangements for rotating anodes; Cooling rotary anodes
    • H01J35/101—Arrangements for rotating anodes, e.g. supporting means, means for greasing, means for sealing the axle or means for shielding or protecting the driving
    • H01J35/1017—Bearings for rotating anodes
    • H01J35/1024—Rolling bearings

Definitions

  • the invention relates to a drive device for the rotating anode of an X-ray tube with a drive motor with stator and rotor, which are operated at anode potential, a rotor shaft driving the rotating anode.
  • the object is achieved in that the rotor of the drive motor is designed as an external rotor and the motor is fed by means of a potential-isolating transmission device.
  • a further substantial reduction in the volume of the motor can be achieved in that the rotor as Outrunner is realized. Since the torque of the motor is essentially determined by the bore area, the total volume of the motor is determined by the motor parts lying outside the bore area at the desired torque. A stator lying outside the bore area is now of substantially larger size than a rotor lying outside the bore area, in particular if, according to a preferred embodiment of the invention, the rotor consists of one or more concentric metal cylinders.
  • the external rotor also has the advantage of a higher moment of inertia compared to an internal rotor, so that in the event of malfunctions in the electronics that feed the motor, e.g. due to high electromagnetic fields, as are typical in X-ray tubes, smaller speed fluctuations will occur. A speed control can then be dispensed with or can be carried out more simply.
  • the external rotor shields the motor's electromagnetic field better against the electron and X-ray beam than with an external stator. This is especially the case if, according to a further embodiment of the invention, the rotor length is greater than the laminated core length of the stator, but less than the total length of the stator. The torque is additionally increased by this rotor arrangement.
  • the stator interior is drilled through to allow the introduction of cooling liquid, for example oil. Drilling the inside of the stator does not adversely affect the motor properties. The However, coolant can be transported to the desired locations.
  • cooling liquid for example oil
  • the rotor cylinder consists of copper.
  • the external rotor also has such small dimensions that there are no strength problems at high speeds (for example between 3000 rpm and 20,000 rpm) in the rotor designed as a copper cylinder .
  • a rotating anode drive can be realized which has a power factor of 0.4 to 0.5 and an efficiency of 40% to 60%. This leads to significant cost reductions in the motor's power supply and in the cooling device of the X-ray tube.
  • the drive motor is supplied via an isolating transformer arrangement or via a potential-isolating DC / DC converter.
  • the drive of the drive motor is guaranteed by the potential isolation by means of an isolating transformer arrangement or a potential-isolating DC / DC converter.
  • volume must be made available for the isolating transformer and DC / DC converter. Due to the spatial separation of motor and electrical isolation, a lower total volume is achieved and this total volume can be more skillfully distributed throughout the device.
  • the rotor is vacuum-separated from the stator by means of a non-magnetic separating layer which also supports the stator laminated core, the separating layer consisting for example of nickel-chromium steel, ceramic or glass.
  • the rotor 5b of the drive motor 5 is located inside the vacuum chamber 3 .
  • the separation from the vacuum chamber 3 is realized in the gap of the motor 5 by the separating layer 4, which can be made, for example, of stainless steel, ceramic or glass.
  • This separating layer 4 also serves to receive the stationary stator laminate 5d.
  • the stator winding 5c is inserted into the slots of this stator lamination stack 5d.
  • Stator winding 5c and stator laminated core 5d form the stator 5a of the drive motor 5.
  • the rotor 5b consists of two different materials, a copper cylinder 5e and an iron cylinder 5f surrounding it.
  • the drive motor 5 drives the rotating anode 7 via a shaft 6.
  • the bearing 7a of the shaft 6 is designed as a ball bearing, but can also be a sliding or a spiral groove bearing.
  • the motor supply takes place via electrically isolating transmission devices according to FIG. 2 or 3.
  • the electrically isolating transmission device according to FIG. 2 consists of a rectifier 11 connected to mains terminals 10a and 10b, an adjoining inverter 12 and an isolating transformer device 13 with the isolating transformer coils 13a and 13b.
  • a frame 14 indicates that the coil 13b and the motor 5 are in the high-voltage region of the X-ray tube.
  • the part of the inverter on the AC side, as well as the coils 13a and 13b and the motor 5 are of three-phase design.
  • FIG. 3 shows another variant of the transmission device.
  • an alternating voltage is supplied to the rectifier 11 via the terminals 10a and 10b, which converts the supplied alternating current into a direct current and forms one DC / DC converter 15 feeds.
  • the DC / DC converter 15 has an inverter part 15a, a rectifier part 15b and an isolating transformer part 15c.
  • the isolating transformer part 15c has two coils 15d and 15e.
  • the rectifier part 15b supplies a DC voltage to an inverter 12, which converts the DC voltage supplied to it into a three-phase AC voltage system and outputs it to the motor 5.
  • the high-voltage region, outlined by line 14, coil 15e and rectifier part 15b of DC / DC converter 15 includes inverter 12 and motor 5.

Landscapes

  • X-Ray Techniques (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
EP94200323A 1993-02-17 1994-02-10 Entraínement pour anode tournante Expired - Lifetime EP0612096B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4304760A DE4304760A1 (de) 1993-02-17 1993-02-17 Antriebsvorrichtung für eine Drehanode
DE4304760 1993-02-17

Publications (2)

Publication Number Publication Date
EP0612096A1 true EP0612096A1 (fr) 1994-08-24
EP0612096B1 EP0612096B1 (fr) 1999-05-06

Family

ID=6480653

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94200323A Expired - Lifetime EP0612096B1 (fr) 1993-02-17 1994-02-10 Entraínement pour anode tournante

Country Status (4)

Country Link
US (1) US5490198A (fr)
EP (1) EP0612096B1 (fr)
JP (1) JP3696263B2 (fr)
DE (2) DE4304760A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19752114A1 (de) * 1997-11-25 1999-05-27 Philips Patentverwaltung Antriebsvorrichtung für eine Röntgen-Drehanode sowie Verfahren zur Steuerung der Antriebsvorrichtung
US6212753B1 (en) * 1997-11-25 2001-04-10 General Electric Company Complaint joint for interfacing dissimilar metals in X-ray tubes
US6281610B1 (en) 1999-06-29 2001-08-28 General Electric Company Slip ring brush assembly and method
US6198803B1 (en) 1999-08-20 2001-03-06 General Electric Company Bearing assembly including rotating element and magnetic bearings
DE19945414C2 (de) * 1999-09-22 2001-07-19 Siemens Ag Rotor für eine Drehanode einer Röntgenröhre
US6542577B1 (en) 2000-08-18 2003-04-01 Koninklijke Philips Electronics, N.V. Hermetically sealed stator cord for x-ray tube applications
DE102009022916B4 (de) * 2009-05-27 2011-05-19 Dst Dauermagnet-System Technik Gmbh Magnetkupplung sowie Spalttopf für eine Magnetkupplung
KR101105967B1 (ko) * 2009-12-21 2012-01-17 엘지전자 주식회사 컴팩트형 압축기
DE102012212133B3 (de) * 2012-07-11 2013-07-25 Siemens Aktiengesellschaft Drehanodenanordnung und Röntgenröhre
CN107546089B (zh) * 2016-08-04 2024-05-28 上海钧安医疗科技有限公司 一种大功率x射线球管
DE102022117847A1 (de) 2022-07-18 2024-01-18 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Vorrichtung zum Kühlen einer elektrischen Antriebsmaschine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4107535A (en) * 1975-06-20 1978-08-15 Hitachi, Ltd. X-ray apparatus utilizing rotary anode type X-ray tubes
FR2484698A1 (fr) * 1980-06-16 1981-12-18 Siemens Ag Tube a rayons x a anode tournante
EP0108336A2 (fr) * 1982-11-03 1984-05-16 General Electric Company Dispositif d'alimentation de puissance à haute fréquence pour générateur à rayons X
JPS61225745A (ja) * 1985-03-29 1986-10-07 Shimadzu Corp 回転陽極ｘ線管
EP0401901A2 (fr) * 1989-06-03 1990-12-12 Philips Patentverwaltung GmbH Générateur pour le fonctionnement d'un tube à rayons x à anode tournante
US5090048A (en) * 1991-05-22 1992-02-18 General Electric Company Shielded enclosure with an isolation transformer

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2399124A1 (fr) * 1977-07-29 1979-02-23 Radiologie Cie Gle Tube a rayons x a anode tournante
DE2815893A1 (de) * 1978-04-12 1979-10-18 Siemens Ag Roentgendiagnostikgenerator mit einem den hochspannungstransformator speisenden wechselrichter

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4107535A (en) * 1975-06-20 1978-08-15 Hitachi, Ltd. X-ray apparatus utilizing rotary anode type X-ray tubes
FR2484698A1 (fr) * 1980-06-16 1981-12-18 Siemens Ag Tube a rayons x a anode tournante
EP0108336A2 (fr) * 1982-11-03 1984-05-16 General Electric Company Dispositif d'alimentation de puissance à haute fréquence pour générateur à rayons X
JPS61225745A (ja) * 1985-03-29 1986-10-07 Shimadzu Corp 回転陽極ｘ線管
EP0401901A2 (fr) * 1989-06-03 1990-12-12 Philips Patentverwaltung GmbH Générateur pour le fonctionnement d'un tube à rayons x à anode tournante
US5090048A (en) * 1991-05-22 1992-02-18 General Electric Company Shielded enclosure with an isolation transformer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 11, no. 70 (E - 485)<2517> 3 March 1987 (1987-03-03) *

Also Published As

Publication number Publication date
DE4304760A1 (de) 1994-08-18
EP0612096B1 (fr) 1999-05-06
JPH06251734A (ja) 1994-09-09
DE59408190D1 (de) 1999-06-10
JP3696263B2 (ja) 2005-09-14
US5490198A (en) 1996-02-06

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