US3777249A - Multiplier assembly - Google Patents

Multiplier assembly Download PDF

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Publication number
US3777249A
US3777249A US00340968A US3777249DA US3777249A US 3777249 A US3777249 A US 3777249A US 00340968 A US00340968 A US 00340968A US 3777249D A US3777249D A US 3777249DA US 3777249 A US3777249 A US 3777249A
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components
dielectric
compartments
voltage
assembly
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US00340968A
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C Dumas
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L25/00—Assemblies consisting of a plurality of semiconductor or other solid state devices
    • H01L25/03—Assemblies consisting of a plurality of semiconductor or other solid state devices all the devices being of a type provided for in a single subclass of subclasses H10B, H10D, H10F, H10H, H10K or H10N, e.g. assemblies of rectifier diodes
    • H01L25/10—Assemblies consisting of a plurality of semiconductor or other solid state devices all the devices being of a type provided for in a single subclass of subclasses H10B, H10D, H10F, H10H, H10K or H10N, e.g. assemblies of rectifier diodes the devices having separate containers
    • H01L25/11—Assemblies consisting of a plurality of semiconductor or other solid state devices all the devices being of a type provided for in a single subclass of subclasses H10B, H10D, H10F, H10H, H10K or H10N, e.g. assemblies of rectifier diodes the devices having separate containers the devices being of a type provided for in subclass H10D
    • 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
    • H02M7/10—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 arranged for operation in series, e.g. for multiplication of voltage
    • H02M7/103—Containing passive elements (capacitively coupled) which are ordered in cascade on one source
    • H02M7/106—With physical arrangement details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/0001—Technical content checked by a classifier
    • H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/30—Technical effects
    • H01L2924/301—Electrical effects
    • H01L2924/3011—Impedance

Definitions

  • ABSTRACT g A voltage multlpher assembly for high voltage appllca-
  • Field 321/8 1 5 tion which provides a unique mechanical and dielectric construction to improve the dielectric breakdown
  • corona discharge may be initiated between the components'themselves or between the components and ground potential.
  • corona discharge can cause damage to the components, and can adversely affect the performance of the assembly and the quality of the picture.
  • FIG. 1 is an isometric view of the high voltage multiplier assembly in accordance with the invention
  • FIG. 2 is an isometric view as seen from the back of the assembly of FIG. 1;
  • FIG. 3 is a schematic diagram of the circuitry of the invention.
  • housing 11 of a high voltage tripler assembly 13, in accordance with the invention may be formed of a polypropylene material. Note that while a voltage tripler assembly is shown, the invention is applicable generally to multi-lattice networks including voltage doublers, triplers, etc.
  • Housing 11 includes a U-shaped case 14 having a closed end 16 and a mounting base closing the other end'of the case.
  • Mounting base 15 includes unting slots A and 208.
  • the back side of the housing 11 is open and after assembly of the components in the case, the case 14 is filled or potted with a suitable encapsulation compound.
  • the case 14 is formed to have three separate side-by-side compartments, 17, 18 and 19 which extend the length of the casing. and which house respective components as will be explained.
  • Compartment 17 is an elongated compartment which is separated from the adjacent compartment 18 by a dielectric barrier 23 extending substantially the full length of the case or casing 14.
  • the barrier 23 is open at a point adjcent the mounting base 15 to permit the input lead 22 to be passed therethrough to couple to an electrical terminal post 25 in compartment 18.
  • Compartment 18 is the center compartment and contains capacitors C1-C5 and diodes Dl-DS which comprise a voltage tripler and which are electrically connected as shown in FIG. 3.
  • the electrical components and the circuit connections of FIG. 3 are known in the art, and per se, do not comprise a part of this invention, hence, they will be explained only briefly.
  • the reference numerals are placed in FIG. 3 to show the points on the electrical circuitry corresponding to the physical construction of FIG. 2.
  • capacitors Cl and C2 function as AC coupling capacitors and also serve to store a DC voltage component, as is known in the art.
  • Capacitors C3, C4 and C5 function as the DC voltage adding capacitors.
  • One terminal of capacitor C4 is connected to terminal post 26, and, hence,'through electrical lead 28 to ground terminal pin 20.
  • Mounting or positioning plates 31, 32 and 33 provide means for positioning the capacitors C1-C5 in interleaved and staggered relation.
  • Terminal posts 35, 37, 39, 41 and 43 are positioned at the ends of, and intermediate, capacitors Cl-CS to facilitate the electrical connections between the capacitors and the diodes Dl-DS which are positioned in superposed, angled and juxtapositioned relation to capacitors Cl-C5.
  • a focusing resistor 45 is mounted in compartment 19 and extends substantially the full length of the compartment. An electrical connection is made from post 43 through lead 44 to one end terminal of resistor 45. Post 43 also connects to the high voltage lead 50.
  • the focusing output resistor 45 may be a potentiometer or a multi-tap resistor as shown in FIG. 1 wherein the resistor 45 provides a focus voltage output from tap 47 and a potentiometer output from terminal 47.
  • the other end terminal of resistor 45 is connected to a trimmer or focus control resistor 52, which is mounted externally of housing 11, as indicated by the dotted line adjacent resistor 52 in FIG. 3. Focusing resistor 45 may be of any suitable shape, such as a flat plate, rectangular rod, etc., and in this embodiment comprises an elongated circular rod or tube.
  • barriers 23 and 51 can be molded or formed as an integral part of the case 14, or the barriers can be separate members positioned in the case during assembly such as by posts, notches or other suitable means.
  • the input lead 22 in compartment 17 is separated from the capacitors Cl-CS and diodes D1-D5 in compartment 18 by dielectric barrier 23.
  • the capacitors Cl-CS and diodes Dl-DS are separated from the focusing resistor 45 by dielectric barrier 51.
  • compartment 17 was foreshortened at a point indicated by the dotted lines 56 in FIG. 2 and the terminal pin 21 relocated accordingly.
  • the function and operation of the assembly 13 remained the same.
  • case 14 is filled with a encapsulation compound such that the components are encapsulated or embedded in casing 14 in the position indicated.
  • the material used as the encapsulation compound is different from the material of the dielectric barrier.
  • a basic concept of the invention is that the dielectric barriers 23 and 51 are of a material which is different from the encapsulating compound, and thus, provide different dielectric impedances to corona breakdown, and accordingly provide improved corona voltage dissipation characteristics to thereby inhibit the initiation and continuation of corona discharge.
  • the voltage input to the assembly 13 is generally a low impedance, high voltage pulse which makes the components highly susceptible to the initiation of a corona discharge if the dielectric separation and spacing is not proper. Therefore, barrier 23 is provided to separate the input lead 22 from the rest of the components. As mentioned above, the barriers 23 and 51 are of material different from the encapsulating compound and have a different dielectric constant then the compound, and hence exhibit different corona breakdown characteristics, thus enhancing the corona inhibiting characteristics.
  • Capacitors C1 and C2 which are AC coupling capacitors, also store energy during the dwell periods between the input pulses. lf sufficient dielectric impedance such as provided by barrier 23 or the combination of barrier 23 and the encapsulating compounds is not present, a corona discharge will result.
  • barrier 51 extends the full length of compartment 19 and, thus completely separates the focusing resistor 45 from the capacitors and diode in compartment 18 and in addition, resistor 45 is embedded in the encapsulation compound.
  • the basic shape and thickness of the barrier 51 may vary depending upon the dielectric insulation parameters required between the diode capacitor matrix and the focusing resistor.
  • the focusing resistor 45 is positioned in spaced relation to he capacitors C1-C5 and diodes Dl-DS to thereby compensate for any corona start voltage which may tend to be initiated by a dielectric failure of barrier 51.
  • capacitor C1 is positioned such that it connects directly to the input lead on one side of the capacitor and the other side of the capacitor is mounted adjacent the barrier 23 to prevent corona breakdown.
  • the voltage gradients between the individual components in the Cl-CS and diode Dl-DS matrix is not equal. That is, in a usual assembly, each component may be at different voltage potential and there is therefore a high probability of corona discharge.
  • barrier construction of the invention an attempt is made to hold the voltage gradient between the various components parts substantially the same to improve corona breakdown characteristics as well as to provide improved voltage regulation.
  • the capacitor C4 which is the ground leg capacitor is positioned adjacent the mounting base to provide enhancedcapacity.
  • the foregoing adds to the overall capacity storage and ladder effect of capacitor C3, and also provides improved regulation and improved high voltage protection.
  • the spacing between the components and the barriers 23 and 51 provide thermal separation and insulation between the various components in the case 14.
  • the focusing resistor 45 which may have a power dissipation of about five watts maximum, is positioned to be physically spaced from other components of the assembly and, in addition, barrier 51 is positioned between the resistor and the other components.
  • the back of the the case 14 is open, and hence, the ambient temperature assists in providing a stable ther mal enviroment.
  • the barrier 51 has a thermal conductivity efficient which is different from that of the encapsulation compound and, thus will tend to prevent the heat from the focusing resistor to affect the diodes and capacitors. The heat from the focusing resistor will thus proceed outwardly through the encapsulating compound and the open bak of the case 14.
  • fins 54 are shown only adjacent the compartment 19, which houses the focusing resistor 45 to provide a chimney effect and cooling function to that portion of the case 14, it will be understood that fins can be provided all along the case as desired to provide a cooling effect to the other portions of the case.
  • the focusing resistor 45 functions as a quiescent load which tends to stabilize the output voltage of the multiplier system when current demands go from mininum to maximum. Further, the focusing resistor also changes the frequency-corona current load characteristics, and thereby minimizes any picture flutter which may be caused by variations in the beam currents. In other words, the focusing resistor 45 acts as a dampening resistor to this corona discharge and thereby minimizes the corona on the output line between the multiplier assembly and the picture tube or other portions of high voltage exterior to the multiplier assembly.
  • a focusing resistor can be connected in parallel with capacitor C4, and resistor 54 can be an untapped high voltage bleeder; however, the
  • FIGS. 1 and 2 1 construction of the assembly of FIGS. 1 and 2 remains essentially the same.
  • a high voltage multiplier assembly comprising a matrix of electronic components including capacitors, diodes and resistor means connectable to a source of voltage, a casing for said components, dielectric barrier means for dividing said casing into substantially fully separate compartments, a dielectric encapsulation compound in said compartments, said components being mounted within said encapsulation compound in said compartments, said encapsulation compound having a different dielectric constant than said barrier means and exhibiting different corona breakdown characteristics than said barrier means, said components mounted on said compartments being at different voltage levels, and said components being positioned and spaced in said compartments to enable the voltages developed in said components to provide voltage gradients between the various components which are substantially the same throughout the casing to thereby inhibit the initiation and continuation of corona discharge.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Details Of Television Scanning (AREA)
US00340968A 1972-02-28 1973-03-14 Multiplier assembly Expired - Lifetime US3777249A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US22990572A 1972-02-28 1972-02-28
US34096873A 1973-03-14 1973-03-14

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FR (1) FR2174041B3 (en:Method)
GB (1) GB1414625A (en:Method)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5011021U (en:Method) * 1973-05-28 1975-02-04
US4010535A (en) * 1973-10-31 1977-03-08 Victor Company Of Japan, Limited Method of fabricating a voltage multiplier circuit assembly
EP0090193B1 (en) * 1982-03-30 1987-07-08 FIAR FABBRICA ITALIANA APPARECCHIATURE RADIOELETTRICHE S.p.A. Voltage multiplier device for high tension equipment, in particular for applications in space.
US20030112297A1 (en) * 2001-12-18 2003-06-19 Fuji Xerox Co., Ltd. Power supply apparatus and image forming apparatus using the same
CN105309050A (zh) * 2013-07-11 2016-02-03 株式会社日立医疗器械 高电压发生装置以及x射线发生装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3428210A1 (de) * 1983-02-02 1986-02-20 Ernst Roederstein Spezialfabrik für Kondensatoren GmbH, 8300 Landshut Hochspannungskaskade
DE3303464A1 (de) * 1983-02-02 1984-08-09 Ernst Roederstein Spezialfabrik für Kondensatoren GmbH, 8300 Landshut Hochspannungskaskade

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2823347A (en) * 1953-10-13 1958-02-11 Samuel A Procter High-voltage power supply
US2880385A (en) * 1952-03-29 1959-03-31 Russell J Callender Voltage multiplication systems
US2985812A (en) * 1958-01-23 1961-05-23 Skysweeper Inc Encapsulated power supply
US3349310A (en) * 1964-03-19 1967-10-24 Medaris Cruger & Patterson Inc Multi-purpose and self-polarized power pack
US3566192A (en) * 1969-02-04 1971-02-23 Semtech Corp Electrical component assembly
US3614539A (en) * 1969-06-02 1971-10-19 Sybron Corp Intrinsically safe system including electrical barrier with external connectors

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2880385A (en) * 1952-03-29 1959-03-31 Russell J Callender Voltage multiplication systems
US2823347A (en) * 1953-10-13 1958-02-11 Samuel A Procter High-voltage power supply
US2985812A (en) * 1958-01-23 1961-05-23 Skysweeper Inc Encapsulated power supply
US3349310A (en) * 1964-03-19 1967-10-24 Medaris Cruger & Patterson Inc Multi-purpose and self-polarized power pack
US3566192A (en) * 1969-02-04 1971-02-23 Semtech Corp Electrical component assembly
US3614539A (en) * 1969-06-02 1971-10-19 Sybron Corp Intrinsically safe system including electrical barrier with external connectors

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5011021U (en:Method) * 1973-05-28 1975-02-04
US4010535A (en) * 1973-10-31 1977-03-08 Victor Company Of Japan, Limited Method of fabricating a voltage multiplier circuit assembly
EP0090193B1 (en) * 1982-03-30 1987-07-08 FIAR FABBRICA ITALIANA APPARECCHIATURE RADIOELETTRICHE S.p.A. Voltage multiplier device for high tension equipment, in particular for applications in space.
US20030112297A1 (en) * 2001-12-18 2003-06-19 Fuji Xerox Co., Ltd. Power supply apparatus and image forming apparatus using the same
US6759766B2 (en) * 2001-12-18 2004-07-06 Fuji Xerox Co., Ltd. Power supply apparatus and image forming apparatus using the same
CN105309050A (zh) * 2013-07-11 2016-02-03 株式会社日立医疗器械 高电压发生装置以及x射线发生装置
US10050550B2 (en) 2013-07-11 2018-08-14 Hitachi, Ltd. High-voltage generation device and X-ray generation device

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Publication number Publication date
GB1414625A (en) 1975-11-19
FR2174041B3 (en:Method) 1976-02-20
FR2174041A1 (en:Method) 1973-10-12

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