IE39524B1 - Improvements in self-biased class coscillators - Google Patents

Improvements in self-biased class coscillators

Info

Publication number
IE39524B1
IE39524B1 IE1308/74A IE130874A IE39524B1 IE 39524 B1 IE39524 B1 IE 39524B1 IE 1308/74 A IE1308/74 A IE 1308/74A IE 130874 A IE130874 A IE 130874A IE 39524 B1 IE39524 B1 IE 39524B1
Authority
IE
Ireland
Prior art keywords
capacitor
winding
discharge
transistor
auxiliary
Prior art date
Application number
IE1308/74A
Other versions
IE39524L (en
Original Assignee
Thorn Electrical Ind Ltd
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 Thorn Electrical Ind Ltd filed Critical Thorn Electrical Ind Ltd
Publication of IE39524L publication Critical patent/IE39524L/en
Publication of IE39524B1 publication Critical patent/IE39524B1/en

Links

Classifications

    • 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
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5383—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a self-oscillating arrangement
    • H02M7/53832—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a self-oscillating arrangement in a push-pull arrangement
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
    • H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
    • H05B41/2821—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a single-switch converter or a parallel push-pull converter in the final stage
    • H05B41/2822—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a single-switch converter or a parallel push-pull converter in the final stage using specially adapted components in the load circuit, e.g. feed-back transformers, piezoelectric transformers; using specially adapted load circuit configurations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Inverter Devices (AREA)

Abstract

1471150 Transistor oscillators THORN ELECTRICAL INDUSTRIES Ltd 18 June 1974 [30 July 1973] 36200/73 Heading H3T [Also in Division H2] In a transistor class C tuned transformer feedback oscillator having a biasing capacitor 19 for the input electrode of a transistor 11, a circuit path 81, 82 is connected to a winding 80 which is coupled to an inductor 20 of a parallel resonant circuit 13 of the tuned transformer such that in operation the circuit 81, 82 provides a potential source of lower voltage than a terminal 14 to which the parallel resonant circuit is connected for discharging the bias capacitor 19 when the transistor 11 is in its non-conductive condition. The oscillator operates similar to Specification 1,308,284. The discharge from capacitor 19 is primarily through resistor 82, diode 81 and auxiliary winding 80 and only to a small extent through resistor 26. The auxiliary winding 80 and diode 81 provide an auxiliary positive rail of lower voltage than the terminal 14 which permits the capacitor 19 to discharge during alternate half cycles without excessive power dissipation. The rate of discharge is set by selecting the value of R82. In a modification (Fig. 2, not shown) a single winding (18a) is used in place of the feedback and auxiliary windings 18, 80, and the positive supply for discharging the biasing capacitor (19a) is provided by a diode (81a) which charges a storage capacitor (84). This discharge rate is adjusted by appropriate selection of the value of a resistor (83). In a further modification (Fig. 3 of the provisional Specification not shown) the lower end of auxiliary winding 80 is connected to 16 via a further winding (86) of the transformer 23. A transformer (Fig. 4, of the provisional Specification not shown) is constructed to provide leakage inductance between a winding section (A) containing windings 20, 18, 80 and a winding section (B) containing windings 24, 24a, 24b and (86) which takes the place of a ballast in a lamp circuit to limit the current through the discharge lamp 60. Windings 80 and (86) are connected in phase opposition so that in the pre-strike interval the discharge voltage across the capacitor 19 is reduced. When the lamp strikes the frequency of the oscillator increases and the output voltage of winding 86 falls to one third of its pre-strike value and the net discharge voltage for capacitor 19 is increased to maintain correct phasing at increased frequency. [GB1471150A]
IE1308/74A 1973-07-30 1974-06-21 Improvements in self-biased class coscillators IE39524B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3620073A GB1471150A (en) 1973-07-30 1973-07-30 Self-biased class c oscillators

Publications (2)

Publication Number Publication Date
IE39524L IE39524L (en) 1975-01-30
IE39524B1 true IE39524B1 (en) 1978-10-25

Family

ID=10385892

Family Applications (1)

Application Number Title Priority Date Filing Date
IE1308/74A IE39524B1 (en) 1973-07-30 1974-06-21 Improvements in self-biased class coscillators

Country Status (9)

Country Link
BE (1) BE817727A (en)
DE (1) DE2432761C2 (en)
DK (1) DK143430C (en)
FR (1) FR2239808B1 (en)
GB (1) GB1471150A (en)
IE (1) IE39524B1 (en)
IT (1) IT1017268B (en)
LU (1) LU70630A1 (en)
NL (1) NL172289C (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2642028C2 (en) * 1976-09-18 1986-01-09 Flender-Himmelwerk GmbH & Co KG, 7400 Tübingen Self-excited static alternator
WO1980001712A1 (en) * 1979-02-15 1980-08-21 T Fogelman Portable self contained lighting device working on solar radiation
DE2909377A1 (en) * 1979-03-09 1980-09-18 Siemens Ag METHOD AND CIRCUIT ARRANGEMENT FOR THE SIMULTANEOUS CONTROL OF MULTIPLE GAS DISCHARGE LAMPS WITH INNER GAS FILLING
FR2503954A1 (en) * 1981-04-09 1982-10-15 Sefli PROCESS FOR ESSENTIALLY SINUSOIDAL CUTTING OF CONTINUOUS VOLTAGE WITH REGULATION AND DEVICE FOR IMPLEMENTING SAID METHOD
US4587463A (en) * 1983-09-22 1986-05-06 Isco, Inc. Absorbance monitor
GB2174257A (en) * 1985-04-25 1986-10-29 Thantiri Mudalige Don Philip Oscillator for gas discharge lamp
JPH04295284A (en) * 1991-03-20 1992-10-20 Hiroshi Sakamoto Electric power supply device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1623117C3 (en) * 1967-09-29 1973-12-06 Siemens Ag, 1000 Berlin U. 8000 Muenchen Circuit arrangement for reducing the harmonic content of inductive loop detectors
GB1308284A (en) * 1971-01-25 1973-02-21 Thorn Electrical Ind Ltd Self-biased class c oscillators

Also Published As

Publication number Publication date
DE2432761A1 (en) 1975-02-13
DK143430C (en) 1981-12-21
DK402274A (en) 1975-03-24
IT1017268B (en) 1977-07-20
NL172289B (en) 1983-03-01
GB1471150A (en) 1977-04-21
BE817727A (en) 1974-11-18
NL172289C (en) 1983-08-01
FR2239808A1 (en) 1975-02-28
NL7409581A (en) 1975-02-03
DE2432761C2 (en) 1984-07-12
DK143430B (en) 1981-08-17
IE39524L (en) 1975-01-30
FR2239808B1 (en) 1979-01-26
LU70630A1 (en) 1974-12-10

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