US2227353A - Voltage regulation - Google Patents

Voltage regulation Download PDF

Info

Publication number
US2227353A
US2227353A US251049A US25104939A US2227353A US 2227353 A US2227353 A US 2227353A US 251049 A US251049 A US 251049A US 25104939 A US25104939 A US 25104939A US 2227353 A US2227353 A US 2227353A
Authority
US
United States
Prior art keywords
voltage
grid
tube
load
source
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.)
Expired - Lifetime
Application number
US251049A
Other languages
English (en)
Inventor
Kuntke Alfred
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.)
Hartford National Bank and Trust Co
Original Assignee
Hartford National Bank and Trust Co
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 Hartford National Bank and Trust Co filed Critical Hartford National Bank and Trust Co
Application granted granted Critical
Publication of US2227353A publication Critical patent/US2227353A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H05G1/10—Power supply arrangements for feeding the X-ray tube
    • H05G1/22—Power supply arrangements for feeding the X-ray tube with single pulses
    • H05G1/24—Obtaining pulses by using energy storage devices

Definitions

  • My invention relates to a circuit arrangement for maintaining the voltage across a load .at a constant value.
  • the main object of my invention is to improve such circuits.
  • a further object is to provide a circuit arrangement which is Iparticularly adapted vto control the voltage across an X-ray tube.
  • a still further object is to provide a circuit arrangement in which the voltage across the load can be maintained at a predetermined value even when the voltage of the supply source very closely 40 approaches this value.
  • I use the plate Voltage of the amplifier tube as a negative grid voltage in the ⁇ grid circuit of the control tube, and so control the amplifier tube that the grid potential thereof is dependent upon the terminal voltage to be maintained constant, and in contradistinction to known'arrangements, increases with decreasing terminal voltage.
  • control tube is placed at a fixed grid voltage, which makes it of particular advantage in controlling the voltage of an AX-ray tube. More particularly, with the instantaneous loads occurring in the opera.
  • the circuit arrangement according to the invention has the additional advantage that the internal resistance of the control tube can be reduced to a Very low value. As a result, the terminal voltage of the load can be maintained at the desired predetermined value even when the voltage of the current supply has become very close to this value. This, of course, is particularly advantageous in the case of an X-ray tube which is supplied with operating voltage by a discharging condenser.
  • the arrangement illustrated comprises a load 2 in the form of an X-ray tube having an anode I8 and a cathode I'l, a condenser I serving as a supply source of variable voltage, a control tube 3 having a grids a plate 20 and a cathode IU, and an amplifier ytube 4 having a cathode II, a grid I3 and a plate I2.
  • Condenser I is charged by a charging arraz'igementv 2l, and as such arrangements are well known in the art, further description of the same is believed unnecessary.
  • a suitable charging circuit is illustrated in the U. S. Patent #1,954,612 to Albert Bouwers.
  • Condenser I has one terminal connected through a conductor 22 to the cathode I'I, and has its other terminal connected to the plate 20 of tube 3 Whose, cathode I is connected through a conductor 23 to anode I8 of the X-ray tube.
  • control tube 3 is connected in series with the X-ray tube and condenser, and takes up the potential difference between the variable supply voltage of the condenser and the load voltage across the X-ray tube.
  • a series circuit comprising a potentiometer having a xed resistor 'I and a variable resistor 6 provided with a sliding contact I4, an anode resstor 8, and an auxiliary current source I5, shown as a battery.
  • the amplifier tube 4 has its cathode I connected to grid 9 of tube 3 and to one terminal of an auxiliary current supply 5 whose other terminal is connected to a point 24.
  • Supply 5 is shown as a battery, but the well-known combination of a transformer and rectiyingsmoothing device may be used.
  • riihe grid I3 is connected through a conductor to a point 2'3 between resistors E and 1.
  • a heavy current may flow through the X-ray tube 2, and a low current may flow through the amplifier tube 4 and resistances 6 and l. Furthermore, a current Will flow from the auxiliary current source 5 through resistance 8 to the amplifier tube 4. As the grid I-S is connected to point 25 on the potentiometer, the potential thereof will be dependent upon the high tension across the X-ray tube.
  • the voltage difference between grid' i3 and cathode II is composed of two parts; the voltage across the auxiliary source of current 5 and .he voltage across resistance 5.
  • the first cornponent part of the grid voltage is positive, the second component part of the grid voltage is negative. Consequently the potential of grid I3 will increase relative to the potential of cathode Il when the voltage across the X-ray tube 2 and thereby the voltage across resistance 6 decreases.
  • the resistor 8 may have a resistance of about 105 ohms, resistor 'I a resistance of about megohrns, and resistor 6 may be adjusted hy sliding the contact I4 to a resistance of about l to 3 megohrns.
  • the auxiliary current source 5 may have a voltage of about 2,000 volts, and the predetermined value cf the voltage to be applied across the X-ray tube may be between 40 and 90 kilovolts.
  • EH-ETTG in which, E5 is the voltage of the auxiliary source of current 5, and Re and R7 are the resistances of the resistors 5 and I respectively.
  • the voltage drop in the tube 3 should become as small as possible in order that the tube voltage can be retained at the desired value.
  • the source of bias voltage I5 is used and is so calculated that if the grid voltage of tube 4 is equal to Zero, it can cause a considerable current to ilow through this tube. Since the grid circuit of tube 3 does not include a considerable ohmic resistance, the internal resistance of control tube 3 can thus be reduced to a negligible value.
  • the voltage across the X- ray tube set to a predetermined value of kv., will not decrease by more than 5% as along as the condenser voltage is 500 volt in excess of the tube voltage.
  • the source of bias voltage I5 is connected between the cathode ID of the control tube 3 and the anode I2 of the amplier 4.
  • the grid capacity of the control tube 3 may be a minimum and the grid voltage may be maintained as stationary as possible. More particularly, in the event of rapid potential variations, the internal capacity of source I5 exercises less influence on the grid voltage of the control tube 3 than if source I5 were connected between the grid 9 and the cathode II.
  • a circuit arrangement for maintaining co1- stant the terminal voltage of a load supplied from a source of variable voltage comprising a control tube connected between said load and source and having an anode, a cathode and a. grid ⁇ a grid circuit for said control tube, an amplifier tube having a grid, said amplifier tube being connected in said grid circuit and with the voltage across the same acting as a negative grid voltage, and means associated with the load to vary the potential of the grid of the amplifier tube with the terminal voltage of the load and to thereby vary the potential of the grid of the control tube and decrease the voltage difference between the grid and anode of the control tube when thc terminal voltage of the load decreases.
  • a circuit arrangement for maintaining constant the terminal voltage of an X-ray tube supplied from a charged condenser comprising a control tube connected between said X-ray tube and condenser and having an anodeA a cathode and a grid, a grid circuit for said control tube,
  • an amplifier tube having a grid said ampiifier c Iii) the X-ray tube and to thereby vary the potential of the grid of the control tube and decrease the voltage difference between the grid and anode of the control tube when the terminal voltage of the X-ray tube decreases.
  • a circuit arrangement for maintaining constant the terminal voltage of a load supplied from a source of variable voltage comprising a control tube connected between said load and source and having a grid, a grid circuit for said control tube, an amplifier tube having a grid, a potentiometer having a tap connected to the grid of said amplifier tube, an auxiliary current source, said amplier tube, currentsource and potentiometer being connected in the order named to form a series connection, said series connection being connected in parallel with the load, and a resistance shunting said amplier and auxiliary current source.
  • a circuit arrangement for maintaining constant the terminal voltage of a load supplied from a source of variable voltage comprising, a control tube connected between said load and source and having an anode, a cathode and a grid, a grid circuit for said control tube, a source of positive bias in said grid circuit and on the cathode side, an amplifier tube having a grid, said amplier tube being connected in said grid circuit and with the voltage across the same acting as a negative grid voltage, and means associated with the load to vary the potential of the grid of the amplifier tube with the terminal voltage of the load and to thereby vary the potential of the grid of the control tube and decrease the voltage diierence between the grid and anode of the control tube when the terminal voltage of the load decreases.
  • a circuit arrangement for maintaining constant the terminal voltage of a load supplied from a source of variable voltage comprising a control tube connected between said load and source and having an anode, a cathode and a grid, a grid circuit for said control tube, an ampliiier tube having a grid and a cathode, said amplifier tube being connected in said grid circuit and with the voltage across the same acting as a negative grid voltage, means associat/ed with the load to vary the potential of the grid of the amplier tube with the terminal voltage of the X-ray tube and thereby vary the potential of the grid of the control tube and decrease the voltage diierence between the grid and anode of the control tube when the terminal voltage of the X-ray tube decreases, and means to interrupt the flow of cul'- rent through the load including a source of negative grid potential adapted to be connected between the cathode and grid of the amplifier.
  • a circuit arrangement for maintaining constant the terminal voltage of an X-ray tube supplied from a charged condenser comprising a control tube having a plate, a cathode and a grid, a plate circuit for said tube including said condenser and X-ray tube, an amplier tube having a grid, a cathode lconnected to the grid of said control tube and an anode connected to the Acathode of said control tube, an auxiliary current supply and a resistor connected in series across the cathode and anode of said amplifier, a potentiometer having a tap, said potentiometer and resistor being connected in series across said load, and a connection between said tap and the grid of the ampliiier.

Landscapes

  • X-Ray Techniques (AREA)
US251049A 1938-01-27 1939-01-14 Voltage regulation Expired - Lifetime US2227353A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEN41612D DE733891C (de) 1938-01-27 1938-01-27 Schaltungsanordnung zum Konstanthalten der Klemmenspannung einer Roentgenroehre

Publications (1)

Publication Number Publication Date
US2227353A true US2227353A (en) 1940-12-31

Family

ID=7348415

Family Applications (1)

Application Number Title Priority Date Filing Date
US251049A Expired - Lifetime US2227353A (en) 1938-01-27 1939-01-14 Voltage regulation

Country Status (7)

Country Link
US (1) US2227353A (fr)
BE (1) BE432356A (fr)
CH (1) CH214985A (fr)
DE (1) DE733891C (fr)
FR (1) FR849431A (fr)
GB (1) GB516047A (fr)
NL (1) NL53067C (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2420844A (en) * 1944-06-15 1947-05-20 Westinghouse Electric Corp Short exposure x-ray apparatus
US2420845A (en) * 1944-06-15 1947-05-20 Westinghouse Electric Corp Short exposure x-ray apparatus
US2549402A (en) * 1948-04-01 1951-04-17 Jr Carl A Vossberg X-ray measuring system
US2549959A (en) * 1944-04-27 1951-04-24 Hartford Nat Bank & Trust Co Device for controlling the terminal voltage of a current load
US2659016A (en) * 1950-07-22 1953-11-10 Gen Radiological Ltd Operation of x-ray tubes
US2712074A (en) * 1945-01-19 1955-06-28 Hugh G Neil Electrical control circuit
US2730628A (en) * 1950-07-22 1956-01-10 Gen Radiological Ltd Operation of x-ray tubes

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2535355A (en) * 1944-12-08 1950-12-26 Darol K Froman Voltage regulation and supply

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2549959A (en) * 1944-04-27 1951-04-24 Hartford Nat Bank & Trust Co Device for controlling the terminal voltage of a current load
US2420844A (en) * 1944-06-15 1947-05-20 Westinghouse Electric Corp Short exposure x-ray apparatus
US2420845A (en) * 1944-06-15 1947-05-20 Westinghouse Electric Corp Short exposure x-ray apparatus
US2712074A (en) * 1945-01-19 1955-06-28 Hugh G Neil Electrical control circuit
US2549402A (en) * 1948-04-01 1951-04-17 Jr Carl A Vossberg X-ray measuring system
US2659016A (en) * 1950-07-22 1953-11-10 Gen Radiological Ltd Operation of x-ray tubes
US2730628A (en) * 1950-07-22 1956-01-10 Gen Radiological Ltd Operation of x-ray tubes

Also Published As

Publication number Publication date
FR849431A (fr) 1939-11-23
BE432356A (fr) 1939-02-28
NL53067C (nl) 1942-09-15
CH214985A (de) 1941-05-31
DE733891C (de) 1943-04-05
GB516047A (en) 1939-12-20

Similar Documents

Publication Publication Date Title
US2697811A (en) Current limiting voltage regulator
US2227353A (en) Voltage regulation
US2206123A (en) Power supply device
US2634394A (en) Means for making a regulator alternatively responsive to voltage and current
US2085060A (en) Constant current system
US2337911A (en) Electric regulator
GB600511A (en) Improvements in or relating to mathematical squaring device of the electron tube type
US2509380A (en) Apparatus for operating devices having a negative temperature characteristic from an alternating current supply circuit
US2628340A (en) Voltage and current regulation
US2551407A (en) Constant current regulating circuit
US2373208A (en) Voltage regulation
US2659016A (en) Operation of x-ray tubes
US2961594A (en) System of regulation
US3766391A (en) Rms current regulator for an x-ray tube
US2519377A (en) Low drop voltage regulator
US2588427A (en) Condenser charge regulation
US2772387A (en) Power supply with regulated positive and negative output voltages
US2563486A (en) Voltage regulator
US2642558A (en) Electric power supply equipment
US2273586A (en) Electric valve circuits
US2717351A (en) Regulators
US3290596A (en) Ratio of permissible to actual X-ray load indicator using plural logarithmic response circuits
US2774032A (en) Electrical regulating circuits
US1880576A (en) Time delay apparatus
US2885627A (en) Voltage regulating device