CN101707845A - Method for improving electromagnetic compatibility of electronic ballast and electronic ballast - Google Patents
Method for improving electromagnetic compatibility of electronic ballast and electronic ballast Download PDFInfo
- Publication number
- CN101707845A CN101707845A CN200910254119A CN200910254119A CN101707845A CN 101707845 A CN101707845 A CN 101707845A CN 200910254119 A CN200910254119 A CN 200910254119A CN 200910254119 A CN200910254119 A CN 200910254119A CN 101707845 A CN101707845 A CN 101707845A
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- circuit
- power factor
- active power
- electronic ballast
- inductance
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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
- 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
Abstract
The invention provides a method for improving the electromagnetic compatibility of an electronic ballast and an electronic ballast. The method comprises the following steps of providing an electronic ballast which comprises an output terminal, a filter circuit, an active power factor improving circuit and a half-bridge circuit which are sequentially and electrically connected with each other. Mutual interference of the circuits is reduced because insulation is formed between the active power factor improving circuit and the half-bridge circuit. The method for improving the electromagnetic compatibility of the electronic ballast can reduce the mutual interference between the active power factor improving circuit and the half-bridge circuit so as to improve the stability and the electromagnetic compatibility (including conduction interference and radiation interference) of the whole electronic ballast, and can cooperate with the filter circuit (first level or second level) of a prepositioned rectification circuit to easily meet relative national standards.
Description
Technical field
The present invention relates to the electric lighting technical field, relate in particular to a kind of method and electric ballast that improves electromagnetic compatibility of electronic ballast.
Background technology
Electric ballast is a converter that power frequency AC is converted to high-frequency ac power, it is that power frequency supply is through radio frequency interference (RFI) filter, behind full-wave rectification and passive (or active) power factor corrector (PPFC or APFC), become DC power supply.By the DC/AC converter, the high-frequency ac power of output 20K-100KHZ is added to the LC series resonant circuit heat filament that is connected with lamp, on capacitor, produce simultaneously resonance high-voltage, be added in lamp tube ends, but make fluorescent tube " discharge " become " conducting " state, enter luminance again.
In the 3C of China authentication system, the electric ballast product also comprises electromagnetic compatibility (EMC) authentication except carrying out the safety certification.Electromagnetic compatibility be exactly research under limited space, time and frequency spectrum condition, various electric equipments can coexist and be unlikely to cause a science of degradation.It comprises the implication of two aspects: one side requires product to prevent or reduces the generation electromagnetic interference, in order to avoid cause other electric equipment decreased performance or damage; The 2nd, the requirement product electromagnetic interference that electric equipment produced to external world has certain resistivity, in order to avoid self performance descends or damages.
In the prior art, the buffer circuit that electronic lamp ballast adopts generally all is to be prepended to the rectification circuit front, as depicted in figs. 1 and 2, Fig. 1 is the schematic diagram that typically comprises the electric ballast of one-level filter circuit, it comprises: the input 110 of Lian Jieing successively, one-level filter circuit 120, active power factor improve circuit (PFC Power Factor Controller) 130, and half-bridge circuit 140.Fig. 2 is the schematic diagram that typically comprises the electric ballast of secondary filter circuit, and it comprises the input 210 that connects successively, and secondary filter circuit 220, active power factor improve circuit 230, and half-bridge circuit 240.According to scheming these two kinds of circuit of electronic ballast as can be known, all be before filter circuit is arranged on rectification circuit, and do not consider that active power factor improves interference and the frequency spectrum stack interference between circuit and half-bridge circuit.Thereby the circuit structure that adopts existing electromagnetic compatibility to improve causes electronic lamp ballast particularly the electromagnetic compatibility of the ballast of new type light sources such as electrodeless lamp, Metal halogen lamp to be improved poor effect, is difficult to satisfy more and more stricter electromagnetic compatibility standard.
Summary of the invention
The present invention is intended to solve in the prior art, and circuit of electronic ballast all is before filter circuit is arranged on rectification circuit, and does not consider that active power factor improves interference and the frequency spectrum stack interference between circuit and half-bridge circuit.Thereby, cause electromagnetic compatibility to improve poor effect, be difficult to satisfy more and more stricter electromagnetic compatibility standard.
In view of this, the invention provides a kind of method of improving electromagnetic compatibility of electronic ballast, may further comprise the steps:
One electric ballast is provided, and it comprises the input that electrically connects successively, filter circuit, and active power factor improves circuit, and half-bridge circuit;
Improve formation isolation between circuit and the half-bridge circuit at described active power factor, reduce the phase mutual interference between the circuit.
Further, described isolation is to improve at described active power factor to increase by the inductance of connecting between circuit and described half-bridge circuit, at described inductance two ends shunt capacitance is set.
Further, described inductance is that common mode inductance, two differential mode inductances or two magnetic beads are formed.
Further, the material of described common mode inductance is ferrite, ferrocart core or ultracrystallite.
Further, described electric capacity is ceramic disc capacitor or polypropylene capactive.
Further, described filter circuit is one-level filter circuit or secondary filter circuit.
The present invention also provides a kind of electric ballast, comprise the input that electrically connects successively, filter circuit, active power factor improves circuit, and half-bridge circuit, it also comprises: buffer circuit is electrically connected at described active power factor and improves between circuit and the described half-bridge circuit, provide isolation, to reduce the mutual interference mutually that described active power factor improves circuit and described half-bridge circuit.
Further, buffer circuit comprises: inductance is series at described active power factor and improves between circuit and the described half-bridge circuit; Electric capacity is arranged at the inductance two ends and is parallel to described active power factor and improves circuit and described half-bridge circuit.
Further, described inductance common mode inductance, two differential mode inductances or two magnetic beads are formed.
Further, the material of described common mode inductance is ferrite, ferrocart core or ultracrystallite.
Further, described electric capacity is ceramic disc capacitor or polypropylene capactive.
Further, described filter circuit is one-level filter circuit or secondary filter circuit.
Utilize the method for improving electromagnetic compatibility of electronic ballast provided by the invention, can reduce active power factor in the electric ballast and improve mutual interference mutually between circuit and the half-bridge circuit, the stability of whole electric ballast is improved, and effectively raise Electro Magnetic Compatibility (comprising conducted interference and radiated interference), and be used the filter circuit (one-level or two utmost points) of preposition rectification circuit, be easy to satisfy relevant national standards.
Description of drawings
Figure 1 shows that the schematic diagram of the electric ballast that has the one-level filter circuit in the prior art;
Figure 2 shows that the schematic diagram of the electric ballast that has the secondary filter circuit in the prior art;
The circuit diagram of the electric ballast that provides according to one embodiment of the invention is provided Fig. 3 A;
The circuit diagram of the electric ballast that provides according to another embodiment of the present invention is provided Fig. 3 B.
Embodiment
For technical characterictic of the present invention is become apparent, below in conjunction with accompanying drawing, provide specific embodiment, the present invention will be further described.
The embodiment of the invention provides a kind of method of improving electromagnetic compatibility of electronic ballast, may further comprise the steps:
At first, provide an electric ballast, it comprises the input that electrically connects successively, filter circuit, and active power factor improves circuit, and half-bridge circuit;
Secondly, improve formation isolation between circuit and the half-bridge circuit, reduce the phase mutual interference between the circuit at described active power factor.
In the present embodiment, described isolation is to improve at described active power factor to increase by the inductance of connecting between circuit and described half-bridge circuit, at described inductance two ends shunt capacitance is set.
See also Fig. 3 A, the circuit diagram of the electric ballast that the method that it is depicted as provides according to the embodiment of the invention produces, this electric ballast 300, comprise the input 310 that electrically connects successively, filter circuit 320, active power factor improves circuit 330, and half-bridge circuit 340, it also comprises: buffer circuit 350, being electrically connected at described active power factor improves between circuit 330 and the described half-bridge circuit 340, in order to reduce the mutual interference mutually that described active power factor improves circuit 330 and described half-bridge circuit 340, improve the stability of electron rectifier.
In the present embodiment, described filter circuit 320 is the one-level filter circuit, also can be the secondary filter circuit, see also among Fig. 3 B 320 ', be used to stop the harmonic wave of electric ballast and various noise signal to disturb other electrical equipment, and stop extraneous harmonic wave and various noise signal to disturb electric ballast itself simultaneously.
Active power factor improves circuit 330 and is used to provide a galvanic current to press, and input power factor is brought up to more than 0.95.
Half-bridge circuit 340 is used to offer the voltage of a high-frequency ac of load 360 (comprising conventional fluorescent lamps, electrodeless lamp, high-pressure sodium lamp, Metal halogen lamp etc.), makes the reliable and secure work of load 360.
Described electric capacity 352,353 is ceramic disc capacitor or polypropylene capactive.Its parameter is relevant with the frequency that active power factor improves circuit and half-bridge circuit.Particularly in the electroless lamp ballasting device, select the good capacitors of high frequency characteristic such as ceramic disc capacitor or polypropylene capacitor for use.
In sum, the method of improving electromagnetic compatibility of electronic ballast of utilizing the embodiment of the invention to provide, can reduce active power factor in the electric ballast and improve mutual interference mutually between circuit and the half-bridge circuit, the stability of whole electric ballast is improved, and effectively raise Electro Magnetic Compatibility (comprising conducted interference and radiated interference), and be used the filter circuit (one-level or two utmost points) of preposition rectification circuit, be easy to satisfy relevant national standards.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; have in the technical field under any and know the knowledgeable usually; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking claims person of defining.
Claims (12)
1. a method of improving electromagnetic compatibility of electronic ballast is characterized in that, may further comprise the steps:
One electric ballast is provided, and it comprises the input that electrically connects successively, filter circuit, and active power factor improves circuit, and half-bridge circuit;
Improve formation isolation between circuit and the half-bridge circuit at described active power factor, reduce the phase mutual interference between the circuit.
2. the method for improving electromagnetic compatibility of electronic ballast according to claim 1 is characterized in that, described isolation is to improve at described active power factor to increase by the inductance of connecting between circuit and described half-bridge circuit, at described inductance two ends shunt capacitance is set.
3. the method for improving electromagnetic compatibility of electronic ballast according to claim 2 is characterized in that, described inductance is that common mode inductance, two differential mode inductances or two magnetic beads are formed.
4. the method for improving electromagnetic compatibility of electronic ballast according to claim 3 is characterized in that, the material of described common mode inductance is ferrite, ferrocart core or ultracrystallite.
5. the method for improving electromagnetic compatibility of electronic ballast according to claim 2 is characterized in that, described electric capacity is ceramic disc capacitor or polypropylene capactive.
6. the method for improving electromagnetic compatibility of electronic ballast according to claim 1 is characterized in that, described filter circuit is one-level filter circuit or secondary filter circuit.
7. electric ballast, comprise the input that electrically connects successively, filter circuit, active power factor improves circuit, and half-bridge circuit, it is characterized in that, also comprise: buffer circuit, be electrically connected at described active power factor and improve between circuit and the described half-bridge circuit, isolation is provided, to reduce the mutual interference mutually that described active power factor improves circuit and described half-bridge circuit.
8. electric ballast according to claim 7 is characterized in that buffer circuit comprises: inductance is series at described active power factor and improves between circuit and the described half-bridge circuit; Electric capacity is arranged at the inductance two ends and is parallel to described active power factor and improves circuit and described half-bridge circuit.
9. electric ballast according to claim 8 is characterized in that, described inductance common mode inductance, two differential mode inductances or two magnetic beads are formed.
10. electric ballast according to claim 9 is characterized in that, the material of described common mode inductance is ferrite, ferrocart core or ultracrystallite.
11. electric ballast according to claim 8 is characterized in that, described electric capacity is ceramic disc capacitor or polypropylene capactive.
12. electric ballast according to claim 7 is characterized in that, described filter circuit is one-level filter circuit or secondary filter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910254119A CN101707845A (en) | 2009-12-02 | 2009-12-02 | Method for improving electromagnetic compatibility of electronic ballast and electronic ballast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910254119A CN101707845A (en) | 2009-12-02 | 2009-12-02 | Method for improving electromagnetic compatibility of electronic ballast and electronic ballast |
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| Publication Number | Publication Date |
|---|---|
| CN101707845A true CN101707845A (en) | 2010-05-12 |
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| CN200910254119A Pending CN101707845A (en) | 2009-12-02 | 2009-12-02 | Method for improving electromagnetic compatibility of electronic ballast and electronic ballast |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683902A (en) * | 2012-09-24 | 2014-03-26 | 东芝照明技术株式会社 | Power supply apparatus and luminaire |
| CN105188241A (en) * | 2014-05-30 | 2015-12-23 | 湖北惠维科技股份有限公司 | Large-power HIG electronic ballast with excellent electromagnetic compatibility |
| CN106787670A (en) * | 2015-11-23 | 2017-05-31 | 现代自动车株式会社 | Power factor correction circuit and the vehicle charger using the circuit |
| CN107307723A (en) * | 2016-04-26 | 2017-11-03 | 广东美的生活电器制造有限公司 | Cooking machine circuit and cooking machine |
| CN111313669A (en) * | 2020-04-03 | 2020-06-19 | 北京中科宇航技术有限公司 | Filter circuit of power supply in floating system |
| CN111313685A (en) * | 2020-03-25 | 2020-06-19 | 广州华凌制冷设备有限公司 | Drive control module and vehicle-mounted air conditioner |
-
2009
- 2009-12-02 CN CN200910254119A patent/CN101707845A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683902A (en) * | 2012-09-24 | 2014-03-26 | 东芝照明技术株式会社 | Power supply apparatus and luminaire |
| CN105188241A (en) * | 2014-05-30 | 2015-12-23 | 湖北惠维科技股份有限公司 | Large-power HIG electronic ballast with excellent electromagnetic compatibility |
| CN106787670A (en) * | 2015-11-23 | 2017-05-31 | 现代自动车株式会社 | Power factor correction circuit and the vehicle charger using the circuit |
| CN107307723A (en) * | 2016-04-26 | 2017-11-03 | 广东美的生活电器制造有限公司 | Cooking machine circuit and cooking machine |
| CN111313685A (en) * | 2020-03-25 | 2020-06-19 | 广州华凌制冷设备有限公司 | Drive control module and vehicle-mounted air conditioner |
| CN111313669A (en) * | 2020-04-03 | 2020-06-19 | 北京中科宇航技术有限公司 | Filter circuit of power supply in floating system |
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Application publication date: 20100512 |