CN201491352U - Self-oscillating half-bridge circuit device and ballast and lamp comprising same - Google Patents
Self-oscillating half-bridge circuit device and ballast and lamp comprising same Download PDFInfo
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- CN201491352U CN201491352U CN2008201403137U CN200820140313U CN201491352U CN 201491352 U CN201491352 U CN 201491352U CN 2008201403137 U CN2008201403137 U CN 2008201403137U CN 200820140313 U CN200820140313 U CN 200820140313U CN 201491352 U CN201491352 U CN 201491352U
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- 238000004804 winding Methods 0.000 claims abstract description 37
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000004020 luminiscence type Methods 0.000 claims 2
- 230000006698 induction Effects 0.000 claims 1
- 239000003990 capacitor Substances 0.000 abstract description 10
- 230000005291 magnetic effect Effects 0.000 description 33
- 238000010586 diagram Methods 0.000 description 6
- 239000011162 core material Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000005292 diamagnetic effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
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Classifications
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- 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
- H05B41/2825—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 bridge converter in the final stage
- H05B41/2827—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 bridge 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
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- 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
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- 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
Abstract
The utility model discloses a self-oscillating half-bridge circuit device which comprises a switch unit, a driving unit and a stopping capacitor, wherein the switch unit comprises a first triode and a second triode which are connected in series for forming a half bridge, the emitter of the first triode is coupled with the collector of the second triode, the collector of the first triode is coupled to a power supply of the self-oscillating half-bridge circuit device, and the emitter of the second triode is coupled to a second output node of the self-oscillating half-bridge circuit device; the driving unit comprises an air-gap transformer, a same name end of a primary winding is coupled with a connection point between the first triode and the second triode, and the other end is coupled with one end of the stopping capacitor; the same name end of a first secondary winding is coupled with the base of the first triode, and the other end is coupled with the connection point; the same name end of a second secondary winding is coupled with the second output node, and the other end is coupled with the base of the second triode; and the other end of the stopping capacitor is coupled with a first output node of the self-oscillating half-bridge circuit device.
Description
Technical field
The circuit field of the oscillator that the utility model relate generally to transformer drives more specifically, relates to the self-oscillation half-bridge circuit that transformer drives, and the ballast and the lamp that use this self-oscillation half-bridge circuit.
Background technology
The self-oscillation half-bridge circuit is widely used in applications such as illumination.What in the prior art, the driver element in the self-oscillation half-bridge circuit used is magnetic ring transformer.Because the tolerance of the parameters of magnetic ring transformer is very big, for example, the tolerance of magnetic ring transformer inductance value can only reach under existing technical conditions+/-25% level, can bring adverse influence to the operating frequency of using the self-oscillation half-bridge circuit that this transformer drives thus, make the numerical value of its operating frequency be difficult to be controlled in certain scope, thereby the operating frequency of final products that can further cause using this self-oscillation half-bridge circuit is widely different.For example, when this self-oscillation half-bridge circuit is applied to ballast, the consistency of the ballast of being produced on operating frequency is relatively poor, causes the ballast that does not meet the operating frequency range demand in a large number to scrap, and causes the waste of great amount of manpower and financial resources thus.In addition, another shortcoming of magnetic ring transformer is that diamagnetic saturability is poor, and a bit small flip-flop will cause that the work of magnetic ring transformer is undesired.As everyone knows, be that also to be to use the ballast of self-oscillation half-bridge circuit often all be should be in various electrical networks for transformer, the self-oscillation half-bridge circuit that uses transformer, there are various power consumption equipments in the electrical network, and these power consumption equipments are not to be the pure resistance characteristic, so the electrical network waveform is contaminated, can make to reach magnetic saturation in the magnetic core of transformer, produce magnetic radiation and disturb.Thus, when using magnetic ring transformer to drive the self-oscillation half-bridge circuit, this magnetic radiation disturbs the service behaviour that can influence the self-oscillation half-bridge circuit.
The utility model content
In view of the above-mentioned problems in the prior art, the utility model provides a kind of self-oscillation half-bridge circuit device that uses air gap transformator to drive, and ballast and the lamp with this self-oscillation half-bridge circuit device is provided.
According to an aspect of the present utility model, a kind of self-oscillation half-bridge circuit device is provided, comprise switch element, driver element and capacitance, wherein:
Described switch element comprises first triode and second triode, described first triode and second triode formation half-bridge that is connected in series, wherein the collector electrode of the emitter of first triode and second triode couples, the collector electrode of first triode is couple to the power supply of self-oscillation half-bridge circuit device, and the emitter of second triode is couple to second output node of self-oscillation half-bridge circuit device;
Described driver element comprises air gap transformator, described air gap transformator comprises elementary winding, first secondary winding and second subprime winding, wherein, tie point between the end of the same name of described elementary winding and first triode and second triode couples, and an end of the other end and capacitance couples; The end of the same name of described first secondary winding is coupled to the base stage of first triode, and the other end is coupled to the tie point between first triode and second triode; The end of the same name of described second subprime winding is coupled to described second output node, and the other end is coupled to the base stage of second triode; And
First output node of the other end of described capacitance and self-oscillation half-bridge circuit device couples.
The utility model also provides a kind of ballast, electronic transformer, LED drive unit with above-mentioned self-oscillation half-bridge circuit device, and the lamp that utilizes this ballast.
The self-oscillation half-bridge circuit device that is driven by air gap transformator of the present utility model can be realized following technical benefits: avoided prior art middle magnetic ring magnetic core of transformer to have the defective of high inductance value tolerance, correspondingly improved the consistency of the operating frequency of self-oscillation half-bridge circuit device, improve the production efficiency of self-oscillation half-bridge circuit device, reduced waste.When being applied to self-oscillation half-bridge circuit device of the present utility model in the ballast, satisfied the temperature requirement of ballast better to half-bridge circuit, bring bigger design freedom for the design of ballast.
Description of drawings
In conjunction with the drawings to the description of embodiment of the present utility model, can know above and other purpose, characteristics and advantage of the present utility model.In each accompanying drawing, identical Reference numeral is represented the identical functions parts.In the accompanying drawings:
Fig. 1 shows the electrical schematic diagram of use according to the ballast of the self-oscillation half-bridge circuit device of an embodiment of the utility model;
Fig. 2 A and Fig. 2 B show the ballast that comprises the self-oscillation half-bridge circuit that is driven by magnetic ring transformer in the prior art respectively and comprise schematic diagram by the current waveform of the ballast of the self-oscillation half-bridge circuit device that drives according to the transformer that has air gap of the present utility model.
Embodiment
Fig. 1 shows the electrical schematic diagram of use according to the ballast of the self-oscillation half-bridge circuit device of an embodiment of the utility model.Wherein comprise switch element, driver element and block capacitor according to self-oscillation half-bridge circuit device of the present utility model.As shown in Figure 1, described switch element comprises the first triode Q1, and the second triode Q2 that is connected in series with the first triode Q1, and the described first triode Q1 and the second triode Q2 form half-bridge.Described driver element is air gap transformator T1, and described air gap transformator T1 comprises elementary winding T1a, the first secondary winding T2c and second subprime winding T2b.Wherein, the tie point of the end of the same name of described elementary winding T1a and the first triode Q1 and the second triode Q2, promptly the intermediate node A of half-bridge couples, and the end of the other end and block capacitor C1 couples.The end of the same name of the first secondary winding T2c is couple to the base stage of the first triode Q1 by first resistor R 1, be used to drive the first triode Q1, the end of the same name of second subprime winding T2b is couple to the second output node N (being ground in the present embodiment) of self-oscillation half-bridge circuit device, its other end is couple to the base stage of the second triode Q2 by second resistor R 2, is used to drive the second triode Q2.The collector electrode of the described first triode Q1 is couple to the power supply of self-oscillation half-bridge circuit device, is DC power supply VDC in the present embodiment.Wherein first and second resistor R 1 and R2 are known as base resistor, are used for limiting respectively the base current of the first triode Q1 and the second triode Q2.Described triode Q1 and Q2 can be BJT triode or CMOS triode etc.In addition, the first output node M of the other end of described capacitance C1 and self-oscillation half-bridge circuit device couples, and the second output node N of the emitter of the second triode Q2 and self-oscillation half-bridge circuit device couples.
In the ballast of Fig. 1, load is a lamp, and inductor L1 is called as choking-winding, and it is coupled between the primary coil T1a and block capacitor C1 of air gap transformator T1, and capacitor C2 is called as ignition capacitor, and it is parallel to the two ends of lamp.Inductor L1 and capacitor C2 constitute resonant circuit.Described lamp can be fluorescent lamp, HID lamp etc.In other embodiments, as required, inductor L1 also can be coupled between capacitor C1 and the lamp.
Though in the embodiment in figure 1, couple as the end of the same name of the elementary winding T1a of the air gap transformator T1 of the driving transformer of self-oscillation half-bridge circuit device and the intermediate node A of half-bridge, the end of the same name of the first secondary winding T2c and the base stage of the first triode Q1 couple, the end of the same name of second subprime winding T2b and the emitter of the second triode Q2 couple, yet, in other embodiments, also can change the connected mode of above-mentioned each circuit element according to the actual needs.
As mentioned above, in self-oscillation half-bridge circuit device of the present utility model, employed driver element is an air gap transformator, rather than the magnetic ring transformer that uses in the prior art.Inventor of the present utility model finds through a large amount of tests, though the self-oscillation half-bridge circuit device of prior art uses magnetic ring transformer as driver element, but, replace magnetic ring transformer not only can increase substantially the consistency of the operating frequency of the self-oscillation half-bridge circuit device that is obtained with air gap transformator, and still can realize using originally the service behaviour of magnetic ring transformer as the self-oscillation half-bridge circuit device of driver element.Air gap transformator is the transformer that has air gap on the magnetic core of transformer, and for the transformer that has air gap, its inductance value is mainly decided by gas length.Inventor of the present utility model recognizes the inductance value of driving transformer according to test and comprises between the operating frequency of self-oscillation half-bridge circuit device of this driving transformer and have the relation of determining.Therefore, by regulating gas length, the tolerance of the inductance value of air gap transformator can reach+and/-3%, well below the inductance value tolerance of prior art middle magnetic ring transformer, this just can significantly improve the consistency of the operating frequency of self-oscillation half-bridge circuit device.
Specifically, use air gap transformator to drive self-oscillation half-bridge circuit device, the operating frequency of self-oscillation half-bridge circuit device is remained in certain scope, promptly can reduce the mobility scale of its operating frequency.Thereby in large-scale production, can reduce the ratio of the self-oscillation half-bridge circuit device of the super scope of operating frequency, make production efficiency improve and reduce waste.Secondly, the transformer that has air gap can make self-oscillation half-bridge circuit device have better temperature stability, to satisfy the temperature requirement of final equipment to parts.In addition, owing to increase the stability that air gap can improve temperature and magnetic field, therefore, compare with magnetic ring transformer of the prior art, the air gap transformator that uses in the utility model reduces the requirement of core material.According to the utility model, in the design of circuit, can come the relevant parameter of regulating circuit neatly by the air gap of regulating air gap transformator, for example, magnetic permeability and inductance value bring very big freedom to circuit design.In addition, the transformer of band air gap can prevent magnetic saturation effectively, thereby reduces the magnetic radiation of self-oscillation half-bridge circuit device is disturbed.
At the manufacture view of the driving transformer T1 of employed band air gap of the present utility model, in contrast to magnetic ring transformer by increasing by the number of turns with equal proportion with each winding, can make the inductance value of air gap transformator consistent with the inductance value of magnetic ring transformer.For example, suppose that the traditional magnet ring driving transformer of existing certain money has the inductance value of 8 microhenrys (μ H), its each winding T1a, T1b, the number of turns ratio of T1c is 2: 3: 3, so in the following manner, can obtain to have the air gap transformator of same inductance value: choose a kind of magnetic core, three winding T1a of coiling, T1b with air gap, T1c, making its number of turns ratio is 12: 18: 18.
Fig. 2 A-2B shows the ballast that comprises the self-oscillation half-bridge circuit that is driven by magnetic ring transformer in the prior art and comprises contrast schematic diagram according to the current waveform of the ballast of the self-oscillation half-bridge circuit device that is driven by the transformer that has air gap of the present utility model.This oscillogram obtains by for example LeCroy oscilloscope.Wherein, Fig. 2 A is depicted as the current waveform figure of the ballast that comprises the self-oscillation half-bridge circuit that is driven by magnetic ring transformer, and Fig. 2 B is the current waveform figure that comprises according to the ballast of the self-oscillation half-bridge circuit device that is driven by air gap transformator of the present utility model.In this comparison diagram, use Reference numeral 1-3 and 1 '-3 ' to come each current waveform shown in presentation graphs 2A and Fig. 2 B respectively.Physical circuit connection mode with the ballast among Fig. 1 is an example, curve 1,1 ' the flow through electric current of half-bridge intermediate node A of expression respectively, curve 2,2 ' the flow through electric current of choking-winding L1 of expression respectively, curve 3,3 ' the flow through electric current of the driving winding T2b that is connected to downside triode Q2 of expression respectively.Wherein, the inductance value of employed magnetic ring transformer and air gap transformator is 8 microhenrys, and the magnetic ring transformer diameter is 10 millimeters, and the number of turns ratio of each winding is 2: 3: 3, and the number of turns ratio of each winding of air gap transformator is 12: 18: 18.From the comparison diagram shown in Fig. 2 A-2B as can be seen, use the ballast of air gap transformator to reach similar current waveform with the ballast that uses magnetic ring transformer.This shows that self-oscillation half-bridge circuit device of the present utility model still can obtain the otherwise effect of the existing self-oscillation half-bridge circuit that is driven by magnetic ring transformer when obtaining the aforementioned techniques advantage.
Though be the utility model to be described above with the example that is applied as of self-oscillation half-bridge circuit device in ballast of using air gap transformator to drive, but, it will be appreciated by those skilled in the art that self-oscillation half-bridge circuit device of the present utility model also can be applicable in electronic transformer and the LED driving arrangement etc.In actual applications, self-oscillation half-bridge circuit device can be connected with external circuit in several ways according to concrete needs, does not repeat them here.Therefore, electronic transformer and the LED driving arrangement that comprises the self-oscillation half-bridge circuit device that is driven by air gap transformator of the present utility model all should be considered to fall in the protection range of the present utility model.
In addition, the ballast according to use air gap transformator of the present utility model can be used for comprising in the lamp of fluorescent lamp, HID lamp etc.Therefore, comprise the self-oscillation half-bridge circuit device that drives by air gap transformator of the present utility model ballast, comprise that the lamp of this ballast also should be considered to fall in the protection range of the present utility model.
Need explanation at this, mentioned physical circuit connected mode, the type of electronic component, parameter among the embodiment of this specification, especially the inductance value of air gap transformator and the winding number of turns all only are exemplary should not be construed as restriction of the present utility model than luminaire body numerical value etc.
Although the utility model is disclosed above by description to specific embodiment of the utility model, but, should be appreciated that those skilled in the art can design various modifications of the present utility model, improvement or equivalent in the spirit and scope of claims.These modifications, improvement or equivalent also should be believed to comprise in protection range of the present utility model.
Claims (7)
1. self-oscillation half-bridge circuit device, comprise switch element (Q1, Q2), driver element (T1a, T2c, T2b) and capacitance (C1), wherein
Described switch element comprises first triode (Q1) and second triode (Q2), described first triode (Q1) and second triode (Q2) the formation half-bridge that is connected in series, wherein the collector electrode of the emitter of first triode (Q1) and second triode (Q2) couples, the collector electrode of first triode (Q1) is couple to the power supply (VDC) of self-oscillation half-bridge circuit device, and the emitter of second triode (Q2) is couple to second output node (N) of self-oscillation half-bridge circuit device;
Described driver element comprises air gap transformator, described air gap transformator comprises elementary winding (T1a), first secondary winding (T2c) and second subprime winding (T2b), wherein, tie point (A) between the end of the same name of described elementary winding (T1a) and first triode (Q1) and second triode (Q2) couples, and an end of the other end and capacitance (C1) couples; The end of the same name of described first secondary winding (T2c) is coupled to the base stage of first triode (Q1), and the other end is coupled to the tie point (A) between first triode (Q1) and second triode (Q2); The end of the same name of described second subprime winding (T2b) is coupled to described second output node (N), and the other end is coupled to the base stage of second triode (Q2); And
First output node (M) of the other end of described capacitance (C1) and self-oscillation half-bridge circuit device couples.
2. self-oscillation half-bridge circuit device according to claim 1, wherein, the tolerance of the inductance value of described air gap transformator is+/-3%.
3. half-bridge circuit according to claim 1 and 2, wherein, the number of turns ratio of the elementary winding (T1a) of described air gap transformator, first secondary winding (T2c) and second subprime winding (T2b) is 12: 18: 18, its inductance value is 8 μ H.
4. ballast that has as each described self-oscillation half-bridge circuit device among the claim 1-3, wherein, choke induction unit (L1) is coupled between the other end and capacitance (C1) of elementary winding (T1a) of air gap transformator of described self-oscillation half-bridge circuit device, and the igniting electric capacity (C2) that is used for the load of ballast is coupled between first output node (M) and second output node (N) of self-oscillation half-bridge circuit device.
5. electronic transformer comprises the driver element of the operation that is used for control load, and wherein said driver element has as each described self-oscillation half-bridge circuit device among the claim 1-3.
6. LED driving arrangement comprises the driver element that is used to control as the operation of the LED of load, and wherein said driver element has as each described self-oscillation half-bridge circuit device among the claim 1-3.
7. lamp comprises:
Luminescence unit; With
Ballast as claimed in claim 4, this ballast is used to control the operation of described luminescence unit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008201403137U CN201491352U (en) | 2008-10-10 | 2008-10-10 | Self-oscillating half-bridge circuit device and ballast and lamp comprising same |
| PCT/EP2009/062457 WO2010040647A1 (en) | 2008-10-10 | 2009-09-25 | Self-oscillating half-bridge circuit device having transformer having air gap, and ballast and lamp including the device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008201403137U CN201491352U (en) | 2008-10-10 | 2008-10-10 | Self-oscillating half-bridge circuit device and ballast and lamp comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201491352U true CN201491352U (en) | 2010-05-26 |
Family
ID=41259349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008201403137U Expired - Fee Related CN201491352U (en) | 2008-10-10 | 2008-10-10 | Self-oscillating half-bridge circuit device and ballast and lamp comprising same |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN201491352U (en) |
| WO (1) | WO2010040647A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107707125A (en) * | 2017-10-20 | 2018-02-16 | 四川莱福德科技有限公司 | Drive circuit and bridge-type resonance circuit |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5416664A (en) * | 1977-06-08 | 1979-02-07 | Nippon Kinzoku Co Ltd | Reactor |
| US5138236B1 (en) * | 1991-05-28 | 1996-11-26 | Motorola Lighting Inc | Circuit for driving a gas discharge lamp load |
| US5889373A (en) * | 1996-12-30 | 1999-03-30 | General Electric Company | Fluorescent lamp ballast with current feedback using a dual-function magnetic device |
| DE10122686A1 (en) * | 2001-05-10 | 2002-11-14 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Control gear for light sources with inexpensive winding goods |
| US6784781B1 (en) * | 2003-04-08 | 2004-08-31 | General Electric Company | Reactor and ballast system |
-
2008
- 2008-10-10 CN CN2008201403137U patent/CN201491352U/en not_active Expired - Fee Related
-
2009
- 2009-09-25 WO PCT/EP2009/062457 patent/WO2010040647A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107707125A (en) * | 2017-10-20 | 2018-02-16 | 四川莱福德科技有限公司 | Drive circuit and bridge-type resonance circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010040647A1 (en) | 2010-04-15 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100526 Termination date: 20121010 |