US2854618A - Electrical power supply - Google Patents

Electrical power supply Download PDF

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Publication number
US2854618A
US2854618A US574404A US57440456A US2854618A US 2854618 A US2854618 A US 2854618A US 574404 A US574404 A US 574404A US 57440456 A US57440456 A US 57440456A US 2854618 A US2854618 A US 2854618A
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US
United States
Prior art keywords
voltage
tube
conductive
output voltage
grid
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
US574404A
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English (en)
Inventor
Crowther Gerald Offley
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.)
US Philips Corp
North American Philips Co Inc
Original Assignee
US Philips Corp
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
Priority claimed from GB13896/55A external-priority patent/GB769815A/en
Application filed by US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US2854618A publication Critical patent/US2854618A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/04—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of vacuum tubes only, with positive feedback
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current 
    • G05F1/46—Regulating voltage or current  wherein the variable actually regulated by the final control device is DC
    • G05F1/52—Regulating voltage or current  wherein the variable actually regulated by the final control device is DC using discharge tubes in series with the load as final control devices

Definitions

  • the present invention relates to a voltage stabilizer circuit. More particularly, the invention relates to a voltage stabilizer circuit having a substantially direct voltage input and an output voltage capable of being switched from one stabilized and preset direct current voltage to another stabilized and preset direct current voltage.
  • the present invention is an improvement in the circuit described in U. S. Patent No. 2,752,555, issued June 26, 1956, to Light. Patent No.
  • 2,752,555 describes a voltage stabilizer circuit capable of being switched from one stabilized and preset direct current output voltage to another stabilized and preset direct current output voltage comprising a variable impedance connected between an input terminal and an output terminal, means for producing a plurality of fractions of the output voltage, each fraction being independently preset, and further means enabling each of the fractions at separate times to be compared with a reference voltage, the result of the comparison being used to influence said variable impedance so as to cause the output voltage to stabilize at a value corresponding to the fraction being compared.
  • An object of the present invention is to provide a circuit which mitigates this disadvantage.
  • a voltage stabilizer circuit as described in U. S. Patent No. 2,752,555 adapted for use with a load having a capacitive component, is provided with discharging means between the output terminals, which discharging means is conductive only while the output voltage is in transition from one voltage to a lower voltage.
  • the discharging means comprises a grid controlled high vacuum electric discharge tube connected substantially between the output terminals. Said tube is held non-conductive by bias except when rendered conductive during said transition by a positive going pulse applied to the control grid.
  • the positive going pulse may be obtained from the means enabling each of the fractions at separate times to be compared with a reference voltage.
  • a series electric discharge tube 1 is connected in the positive lead 18, 18 between an input terminal 19 and an output terminal 20.
  • 19 is connected the combination of a resistor 7, first and second electric discharge tubes 2 and 3 respectively, having their anodes and cathodes connected in parallel and "ice a reference voltage source in the form of a neon stabilizer tube 8.
  • the resistor 7 is the common anode load of the tubes 2 and 3, the voltage developed across it being applied to the control grid of the tube 1.
  • a resistor 9 is provided in parallel with resistor 7 and tubes 2 and 3 to ensure that the neon stabilizer tube 8 is kept ignited.
  • the control grid 4 of tube 2 is supplied from the junction of a variable resistor 11 and a fixed resistor 1?. of a resistor chain 10, 11 and 12 connected across the output terminals 20, 20.
  • the voltage of the control grid 4 is a proportion of the output voltage and the proportion may be varied between limits by variation of the resistor 11.
  • the control grid 5 of tube 3 is similarly supplied from the resistor chain 13, 14 and 15 with the exception that another resistor 16 is interposed between the junction of resistors 14 and 15 and the control grid 5.
  • This resistor to acts as part of the anode load of a keying tube 17 connected between the control grid 5 and ground.
  • the tube 17 is caused to be conductive or non-conductive by the application of a voltage to its control grid via terminals 21, 21.
  • the proportion of voltage supplied to grid 4 is less than that supplied to grid 5 so that when the keying tube 17 is non-conductive, tube 3 is conductive and tube 2 is non-conductive, whereas when the tube 17 is conductive the voltage of control grid 5 falls well below the cathode voltage determined by neon stabilizer tube 8 and tube 3 becomes non-conductive and tube 2 becomes conductive.
  • a substantially direct current source of supply which may be in the form of a power pack supplied from the alternating current supply source and may comprise a transformer, rectifier and smoothing filter.
  • This circuit arrangement is modified in accordance with the present invention by the addition of a triode 22 having its anode connected to the cathode of tube 1, its control grid connected to the anode of tube 17 and its cathode connected to the junction of a voltage divider connected between the anode of tube 1 and ground and formed by resistor 23 in series with a resistor 24. Resistor 24 is shunted by a bypass capacitor 25.
  • the voltage divider 23, 24 provides a positive bias voltage for the cathode of tube 22 so that it remains nonconductive in the quiescent condition.
  • T he ciricuit operates as follows:
  • variable resistor 14 is adjusted.
  • tube 3 becomes conducting causing the output voltage to decrease which, in turn, causes tube 2 to be nonconducting.
  • tube 22 is made conductive its anode falls in voltage, the grid of tube 22 falls with it and tube 22 remains non-conductive.
  • the output voltage rises to the new stabilized voltage and accordingly the voltage at the junction of resistors 14, and 16 also rises, so that when tube 17 is again made non-conductive the voltage of the anode of tube 17 and the grid of tube 22 rises towards the voltage of the junction of resistors 14, 15 and 16.
  • the output voltage falls to the lower voltage which is stabilized by control tube 3, and with it falls the voltage of the grid of tube 22 until it (tube 22) again becomes non-conductive.
  • tube 22 is conductive only during a transition from a higher stabilized voltage to a lowerstabilized voltage and serves to discharge the capacitive components of a load across terminals 20, 20 thereby enabling a quicker transition:
  • the portion of the circuit comprising components 22 to 25 inclusive may be connected in similar manner to the circuit shown in Figure 2 of U. S. Patent No. 2,752,555 with equal advantage.
  • a voltage stabilizer circuit capable of being switched from one stabilized and preset direct current output voltage to another stabilized and preset direct current output voltage, said circuit having a pair of output terminals, and a load having a capacitive component connected between said output terminals, comprising a variable impedance connected between an input terminal and an output terminal of said circuit, means for producing a plurality of fractions of the output voltage, each fraction being independently preset, means enabling each of the fractions at separate times to be compared with a reference voltage, the result of the comparison being used to influence said variable impedance so as to cause the output voltage to stabilize at a value corresponding to the fraction being compared, discharge means connected between said output terminals, and means for rendering said discharge means conductive during the transition of the output voltage from one value to another value of relatively lower magnitude.
  • a voltage stabilizer circuit capable of being switched from one stabilized and preset direct current output voltage to another stabilized and preset direct current output voltage, said circuit having a pair of output terminals, and a load having a capacitive component connected between said output terminals, comprising a variable impedance connected between an input terminal and an output terminal of said circuit, means for producing a plurality of fractions of the output voltage, each fraction being independently preset, means enabling each of the fractions at separate times to be compared with a reference voltage, the result of the comparison being used to influence said variable impedance so as to cause the output voltage to stabilize at a value corresponding to the fraction being compared, discharge means comprising a grid-controlled electron discharge device connected between said output terminals, means for normally maintaining said discharge device non-conductive, and means for rendering said discharge device conductive during the transition of the output voltage from one value to another value of relatively lower magnitude.
  • a voltage stabilizer circuit capable of being switched from one stabilized and preset direct current output voltage to another stabilized and preset direct current output voltage, said circuit having a pair of output terminals, and a load having a capacitive component connected between said output terminals, comprising a variable impedance connected between an input terminal and an output terminal of said circuit, said variable impedance comprising a first electron discharge tube having a grid, means for producing a plurality of fractions of the output voltage, each fraction being independently preset, means enabling each of the fractions at separate times to be compared with a reference voltage, the result of the comparison being used to influence said variable impedance so as to cause the output voltage to stabilize at a value corresponding to the fraction being compared, said last-mentioned means comprising the arrangement of first and second control tubes each having a cathode, an anode and a grid, the two control tubes having a common anode circuit and a common cathode circuit, the common anode circuit being connected to the grid of said first discharge tube and

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Generation Of Surge Voltage And Current (AREA)
US574404A 1952-06-30 1956-03-28 Electrical power supply Expired - Lifetime US2854618A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB1080229X 1952-06-30
GB13896/55A GB769815A (en) 1955-05-13 1955-05-13 Improvements in or relating to electrical power supplies
GB1021934X 1955-05-13
GB2854618X 1955-05-13

Publications (1)

Publication Number Publication Date
US2854618A true US2854618A (en) 1958-09-30

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Application Number Title Priority Date Filing Date
US574404A Expired - Lifetime US2854618A (en) 1952-06-30 1956-03-28 Electrical power supply

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US (1) US2854618A (enrdf_load_html_response)
NL (1) NL102990C (enrdf_load_html_response)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3089094A (en) * 1958-08-15 1963-05-07 Gen Electric Regulated pedestalled grid bias supply

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2427109A (en) * 1943-12-20 1947-09-09 Rca Corp Voltage regulator
US2752555A (en) * 1952-06-30 1956-06-26 Hartford Nat Bank & Trust Co Electrical regulated power supplies

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2427109A (en) * 1943-12-20 1947-09-09 Rca Corp Voltage regulator
US2752555A (en) * 1952-06-30 1956-06-26 Hartford Nat Bank & Trust Co Electrical regulated power supplies

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3089094A (en) * 1958-08-15 1963-05-07 Gen Electric Regulated pedestalled grid bias supply

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