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WO2010002279A1 - Lampe et ballast électronique - Google Patents

Lampe et ballast électronique Download PDF

Info

Publication number
WO2010002279A1
WO2010002279A1 PCT/NZ2009/000132 NZ2009000132W WO2010002279A1 WO 2010002279 A1 WO2010002279 A1 WO 2010002279A1 NZ 2009000132 W NZ2009000132 W NZ 2009000132W WO 2010002279 A1 WO2010002279 A1 WO 2010002279A1
Authority
WO
WIPO (PCT)
Prior art keywords
lamp
light source
fluorescent light
current
transformer
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.)
Ceased
Application number
PCT/NZ2009/000132
Other languages
English (en)
Inventor
Thomas W. Mackenzie
Vinod K. Gopal
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.)
Intellectual Property Energy Mad Ltd
Original Assignee
Intellectual Property Energy Mad 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 Intellectual Property Energy Mad Ltd filed Critical Intellectual Property Energy Mad Ltd
Priority to CN2009801270077A priority Critical patent/CN102084181A/zh
Publication of WO2010002279A1 publication Critical patent/WO2010002279A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/08—High-leakage transformers or inductances
    • H01F38/10—Ballasts, e.g. for 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
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Definitions

  • the invention relates to a lamp.
  • a lamp including a fluorescent bulb and a ballast.
  • the present invention is of particular application to situations where high energy light lamps (bulbs) are employed which operate from a low voltage input.
  • the 12 volt halogen bulb is currently used in many types of lights.
  • a lamp which includes:
  • the housing encloses an electronic ballast including a transformer capable of raising an input voltage of between 9-14 volts to that required to operate the lamp;
  • the transformer is coupled to a current regulation circuit which maintains a substantially constant and limited current during operation of the fluorescent light source and wherein the lamp includes a 12 volt electrical connector.
  • the input voltage may be substantially 12 volts.
  • the housing may have a cross sectional diameter which is substantially 45mm or less.
  • a housing of this size has the advantage that it may be used with some common lighting fixtures as used for halogen lamps, a standard MR16 halogen bulb having an outer diameter of approximately 50mm.
  • the housing may generally be substantially tubular in nature.
  • the housing includes a reflective internal surface which is proximate the fluorescent light source.
  • the current regulation circuit may be an electronic ballast which includes at least one passive impedance device.
  • the current regulation circuit may be an electronic ballast which includes an intelligent chip, a self oscillating controller or a switch mode controller for example.
  • a lamp including:
  • an electronic ballast including a transformer having an output connection to provide power to the fluorescent light source
  • the electronic ballast includes at least one passive impedance device which provides feedback resisting a change of current in the transformer during operation of the fluorescent light source.
  • ballast for a lamp including a fluorescent light source, the ballast including;
  • a transformer having an output connection to provide current to the fluorescent light source
  • the ballast includes at least one passive impedance device which provides feedback resisting a change of the current in the transformer during operation of the fluorescent light source.
  • the passive impedance device is a coupled inductor.
  • the integrated ballast includes a transformer capable of raising an input voltage of between 9-14 volts to that required to operate the lamp;
  • the transformer is coupled to a current regulation circuit, which, in use, maintains a substantially constant current within the specified current ratings of the attached CFL.
  • the fluorescent light source may generally be in the form of a Tubular Fluorescent Lamp, Cold Cathode Fluorescent Lamp (CCFL), Compact Fluorescent Lamp (CFL), or the like.
  • CFL compact fluorescent lamp
  • CFLs provide a number of advantages over other forms of lighting, including long operating lifetimes (around 6,000 to 15,000 hours compared with about 750 to 1000 hours for typical incandescent lamps).
  • the energy required to operate a CFL may also be (for the same luminous flux) around 50% less than that required to operate a halogen lamp and around 80% less than that required to operate a 240V incandescent lamp.
  • CFLs may also be safer to use than halogen lamps, which require UV filters over the halogen bulbs, and can be handled more easily than halogen lamps (the operating lifetime of which can be significantly shortened if the surface of the bulb becomes contaminated, for example by fingerprints).
  • the lamp includes an electrical connector configured to connect with a 12V electrical connection.
  • the 12V connector is a two pin connector.
  • the connector is an industry standard GX2.5 bi-pin connector, such as is standard on MR16 halogen bulbs.
  • Bi-pin connectors are the industry standard connector used for connecting MR16 halogen lamps to 12V supplies.
  • An advantage of a light bulb according to the present invention including a bi-pin connector is that it may be plugged directly into a 12V fitting designed for an MR16 12V halogen lamp.
  • having a cross sectional diameter substantially corresponding to 45mm allows the lamp to be used in lighting appliances normally used with MR 16 Halogen lamps. Therefore, in many instances, such as for vertically mounted halogen lamp fittings, a halogen lamp can be replaced by a fluorescent lamp according to the present invention without the need to replace the fitting. In this way the advantages provided by CFLs over halogen lamps can be provided by replacing the halogen lamp with a CFL (configured as above) in the same fitting.
  • the CFL lamp may be connected to the ballast with a four-pin connector.
  • a four-pin connector assists with preheating the lamp filament prior to initiation of the gas discharge. Preheating may increase the operational lifetime of the CFL
  • the CFL lamp may be connected to the ballast with a two pin connector, not providing the facility for pre-heating of the lamp filaments.
  • the low voltage input may be AC or DC. It is envisaged in addition the low voltage input can be sourced from any type of commonly known transformer used to supply substantially 12V AC or DC.
  • references to electronic ballast throughout this specification should be understood to refer to a device, consisting of a number of electronic components connected in a circuit, configured to limit the amount of current in an electric circuit.
  • ballast typically now electronic although magnetic ballasts may be used
  • a ballast is commonly used in circuits where the load is not static, instead presenting a negative, or negative differential, impedance whereby increasing current flow causes the resistance to drop, thereby creating a runaway effect of increasing current and decreasing resistance.
  • Fluorescent light sources are one such device that exhibits a negative impedance, thus a non-current limited fluorescent light source would draw an ever increasing amount of current from the power supply until failure of the tube, or some component of the supply.
  • An electronic ballast according to the present invention includes a transformer capable of raising an input voltage of substantially 12V to that required to initiate a gas discharge in the CFL. Typically this may occur at around 1200V to 1500V.
  • the electronic ballast includes a passive impedance device in the electronic ballast. In especially preferred embodiments this is a coupled inductor.
  • references to a 'coupled inductor' as used herein refers to one or more inductors sharing some substantial degree of mutual inductance therebetween. It would therefore be apparent to a person skilled in the art that any variation in the current flow in one inductor, will result in a corresponding alteration in the current flow in the other inductor.
  • the coupled inductor includes two inductive elements; these are for clarity referred to as the primary inductor and secondary inductor.
  • Reference to a passive impedance device throughout this specification should be understood to refer to an electronic element that is not capable of power gain. Examples of passive devices include resistors, capacitors, inductors, diodes and transformers.
  • an active device is an electronic element that is capable of providing gain.
  • Active devices include transistors, integrated circuits and similar devices.
  • the coupled inductor includes primary and secondary windings which may be connected such that they are in an opposed relationship.
  • a coupled inductor comprises primary and secondary inductances which are formed by being counter wound in opposite directions on the same magnetic structure, such that a mutual inductance couples said two inductors.
  • Other embodiments may include primary and secondary inductors wound in the same direction on the same structure, but connected in an opposed relationship.
  • the coupled inductor configured as above is connected to the ballast circuit in such a manner as to provide negative feedback to resist any rapid or out of specification change in the current flowing in the transformer when the lamp is operating.
  • ballasts of the prior art which do not include a coupled inductor
  • Such a change in current can occur in ballasts of the prior art (which do not include a coupled inductor) as a result of overheating of the components of the ballast, and in particular of the switching elements.
  • the ratio of the primary to secondary inductances is substantially in the range from about 1 :5 to about 1 :8.
  • the ratio of the inductance values will vary depending on the power rating of the CFL.
  • a significant advantage of using a coupled inductor as described above is that it may take up less physical space within the housing as well as being less expensive than alternative methods of providing a current limited and regulated supply, such as through the use of active circuitry. Both of these features are important in providing a lamp which is relatively compact in size and at a cost that makes it an attractive alternative to the use of a halogen lamp.
  • the passive device may be a resistor. In others it may be an air gap in the transformer core used to adjust the inductance of the circuit.
  • the electronic ballast includes switching elements in the form of bipolar transistors.
  • Bipolar transistors are preferred as switches as they may provide a low cost solution while meeting the requirements for switching speed and low storage time.
  • a housing for a fluorescent light source which is configured to retain the fluorescent light source, wherein the housing includes:
  • preferred embodiments of the present invention may have a number of advantages which can include:
  • Figure 1A shows an isometric view of a lamp according to one embodiment of the present invention
  • Figure 1B shows a plan view of the lamp shown in Figure 1 A;
  • Figure 1C shows a left side cross sectional view of the lamp shown in Figure 1A;
  • Figure 1D shows a profile view of the lamp of Figure 1 A
  • Figure 1E shows a right side cross sectional view of the lamp of Figure 1 A
  • FIG. 2 shows a schematic diagram of an electronic ballast according to one embodiment of the present invention
  • FIG. 3 shows a schematic diagram of an electronic ballast according to another embodiment of the present invention.
  • FIG. 4 shows a schematic diagram of an electronic ballast according to one embodiment of the present invention
  • Figure 5 shows a schematic diagram of an electronic ballast according to another embodiment of the present invention
  • Figure 6 shows a schematic diagram of an electronic ballast according to another embodiment of the present invention.
  • FIG. 7 shows a schematic diagram of an electronic ballast according to another embodiment of the present invention.
  • a lamp according to a preferred embodiment of the present invention is generally indicated by arrow (1) in Figures 1 A, 1B 1 1C, 1 D and 1E.
  • the lamp (1) includes a fluorescent light source, in the form of a compact fluorescent lamp (CFL) (2), shown in Figures 1C and 1E.
  • CFL compact fluorescent lamp
  • the CFL (2) is shown enclosed within a lamp housing (3) which also has a ballast housing (4), also shown is internal reflective surface (21) proximate the CFL (2), all as shown in Figures 1C and 1E.
  • the housing (3) also contains a transformer (not shown) located within the ballast housing (4) which is capable of raising an input voltage of between 9 to 14V to that required to operate the lamp (1, 2).
  • the lamp (1) includes a 12V electrical connector, shown as a bi-pin GX5.3 connector (5), shown in Figures 1A, 1B, 1C, 1D and 1E.
  • FIG 2 there is shown a current regulation circuit in the form of an electronic ballast, generally indicated by arrow (6) for use with a lamp.
  • the ballast (6) includes two interconnected circuits, a rectifying circuit (7) and a self oscillating inverter circuit (8).
  • the rectifying circuit (7) and a self oscillating inverter circuit (8) being interconnected at a current regulated node (25), a non-current regulated node (13) and a return node (26).
  • the ballast (6) includes a transformer (9) providing an output to CFL terminals (10) to provide power to the CFL (2) (not shown in Figure 2).
  • the connection (10) shown in Figure 2 is a 4 pin 12V connector.
  • Power is supplied to the ballast (6) through the 12V input (5, 11) which is in the form of a bi-pin GX5.3 connector.
  • the ballast (6) includes a passive device, in the form of a pair of coupled inductors (15).
  • the coupled inductors (15) are configured such that both primary 23 and secondary 24inductors are connected in an opposing polarity.
  • the ratio between the primary 23 and secondary 24 inductances is in the range of 1 :5 to 1:8 depending on the power rating of the CFL.
  • FIGs 3 - 6 The schematic diagrams of a number of ballast circuits according to further embodiments of the present invention are shown in Figures 3 - 6, all are variants of well known ballasts of the prior art except for the novel inclusion of a coupled inductor (15) in place of a standard inductor (not shown).
  • the coupled inductor (15) resists any change in the current flow when the lamp is operating normally.
  • the coupled inductor (15) acts to limit the flow of current due to the opposed nature of the inductive elements.
  • the primary inductor (23) inducing an opposing emf in the mutually coupled second inductor (24), thereby reducing the voltage available at current regulated node (25) supplying the self oscillating inverter circuit (8).
  • a change in current through the coupled inductor 15 can arise when the operating temperature of the components (mainly the switching elements, typically transistors (16) as shown in Figures 2 -5, or MOSFETs (17) as shown in Figure 6) nears or exceeds their maximum operationing temperature specification.
  • the components mainly the switching elements, typically transistors (16) as shown in Figures 2 -5, or MOSFETs (17) as shown in Figure 6) nears or exceeds their maximum operationing temperature specification.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

La présente invention concerne une lampe qui comprend : une source lumineuse fluorescente; et un boîtier dans lequel la source lumineuse est maintenue; le boîtier contenant un ballast électronique qui comprend un transformateur capable de relever une tension d’entrée comprise entre 9-14 volts à la tension nécessaire à l’utilisation de la lampe; caractérisée en ce que le transformateur est couplé à un circuit de régulation de courant qui maintient un courant sensiblement constant et limité pendant l’utilisation de la source lumineuse fluorescente et la lampe comprenant un ensemble connecteur de 12 volts/
PCT/NZ2009/000132 2008-07-04 2009-07-06 Lampe et ballast électronique Ceased WO2010002279A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009801270077A CN102084181A (zh) 2008-07-04 2009-07-06 灯和电子镇流器

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NZ567250 2008-07-04
NZ567250A NZ567250A (en) 2008-07-04 2008-07-04 A Fluorescent Lamp with feedback ballast resisting a change of current in the form of a coupled inductor

Publications (1)

Publication Number Publication Date
WO2010002279A1 true WO2010002279A1 (fr) 2010-01-07

Family

ID=41466168

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NZ2009/000132 Ceased WO2010002279A1 (fr) 2008-07-04 2009-07-06 Lampe et ballast électronique

Country Status (3)

Country Link
CN (1) CN102084181A (fr)
NZ (1) NZ567250A (fr)
WO (1) WO2010002279A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3746921A (en) * 1972-11-26 1973-07-17 Progressive Dynamics Fluorescent lamp circuit with low voltage supply
US5378964A (en) * 1993-11-01 1995-01-03 Goldstar Instrument & Electric Co., Ltd. Electronic ballast circuit for discharge lamps
CN2768195Y (zh) * 2004-07-14 2006-03-29 戴培钧 针式灯脚的反射式电子节能灯

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3746921A (en) * 1972-11-26 1973-07-17 Progressive Dynamics Fluorescent lamp circuit with low voltage supply
US5378964A (en) * 1993-11-01 1995-01-03 Goldstar Instrument & Electric Co., Ltd. Electronic ballast circuit for discharge lamps
CN2768195Y (zh) * 2004-07-14 2006-03-29 戴培钧 针式灯脚的反射式电子节能灯

Also Published As

Publication number Publication date
NZ567250A (en) 2011-03-31
CN102084181A (zh) 2011-06-01

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