GB1032306A - - Google Patents

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Publication number
GB1032306A
GB1032306A GB1032306DA GB1032306A GB 1032306 A GB1032306 A GB 1032306A GB 1032306D A GB1032306D A GB 1032306DA GB 1032306 A GB1032306 A GB 1032306A
Authority
GB
United Kingdom
Prior art keywords
phase
voltage
contactor
resistor
delay
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.)
Active
Application number
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.)
Publication of GB1032306A publication Critical patent/GB1032306A/en
Active 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
    • H05G1/56—Switching-on; Switching-off
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
    • H02M7/068—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode mounted on a transformer
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/02—Manually-operated control
    • H03G3/04—Manually-operated control in untuned amplifiers
    • H03G3/10—Manually-operated control in untuned amplifiers having semiconductor devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • X-Ray Techniques (AREA)

Abstract

1,032,306. Rectifying. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. Aug. 26, 1964 [Aug. 29, 1963], No. 34911/64. Heading H2F. In a high-voltage D.C. supply (e.g. for X-ray apparatus) comprising a three-phase transformer 1 feeding a bridge rectifier 8, switch-on voltage surges in the rectified output are prevented by using a relay contactor 10 to connect all three phases of the transformer 1 to a threephase supply at the instant the voltage on one phase passes through zero and by including in one phase a damping resistor 21 which is shorted out after a delay (of e.g. 3 to 7 milliseconds for a 50 c/s. supply). A known circuit arrangement Sy detects the said voltage zero on one phase (T) and operates the contactor 10, and the resistor 21 is connected in the phase (R) whose voltage lags by 120 degrees with respect to the phase T. An auxiliary contact 24 on contactor 10 operates an auxiliary relay 23 which shorts out resistor 21 after a delay. In a modification (Fig. 3, not shown) the auxiliary relay 23 may be omitted and the contact 24 itself then operates with a delay to short out the resistor 21. In a further modification (not shown) the relay contactor 10 may be replaced by gas-discharge tubes.
GB1032306D 1964-08-28 Active GB1032306A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR986614A FR1405199A (en) 1964-08-28 1964-08-28 Circuit for three-phase high voltage transformers feeding a rectifier

Publications (1)

Publication Number Publication Date
GB1032306A true GB1032306A (en)

Family

ID=8837472

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1032306D Active GB1032306A (en) 1964-08-28

Country Status (2)

Country Link
FR (1) FR1405199A (en)
GB (1) GB1032306A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2652940C2 (en) * 1976-11-22 1985-12-05 Siemens AG, 1000 Berlin und 8000 München X-ray diagnostic generator with directly heated X-ray tube
DE2719373C2 (en) * 1977-04-30 1982-10-21 Philips Patentverwaltung Gmbh, 2000 Hamburg Circuit arrangement of an X-ray generator with an electronic switch controlled by a timing control element in the primary circuit of a high-voltage transformer
FR2507408A1 (en) * 1981-06-05 1982-12-10 Jeumont Schneider Switching in three-phase transformer to avoid in rush transient - using switch in each arm of delta connected transformer circuit and electronically monitoring voltage and slope to control thyristor switch

Also Published As

Publication number Publication date
FR1405199A (en) 1965-07-02

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