CN102088814B - Low-frequency electrodeless lamp drive circuit with open-circuit protection function - Google Patents
Low-frequency electrodeless lamp drive circuit with open-circuit protection function Download PDFInfo
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- CN102088814B CN102088814B CN2010105699476A CN201010569947A CN102088814B CN 102088814 B CN102088814 B CN 102088814B CN 2010105699476 A CN2010105699476 A CN 2010105699476A CN 201010569947 A CN201010569947 A CN 201010569947A CN 102088814 B CN102088814 B CN 102088814B
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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
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- 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
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Abstract
The invention provides a low-frequency electrodeless lamp drive circuit with an open-circuit protection function. The drive circuit comprises an EMI (electromagnetic interference) filter, a rectifier bridge and a PFC (power factor correction) circuit which are sequentially connected together, wherein, a first output terminal of the PFC circuit is sequentially connected with a first resistor, a choke coil, the coupling coil of the electrodeless lamp and a second resistor and then is connected with the input terminal of the PFC circuit; a second output terminal of the PFC circuit is connected with the input terminal of a half-bridge controller; the output terminal of the half-bridge controller is connected with a first MOST (metal oxide semiconductor transistor) and a second MOST which are connected in parallel; the output terminal of the first MOST is connected with the output terminal of the second MOST and is connected with the input terminal of the choke coil through a third resistor and a first capacitor which are connected in parallel; and the input terminal of the second MOST is connected on two ends of the coupling coil of the electrodeless lamp through a second capacitor and a third capacitor respectively. The drive circuit has the beneficial effect that the ballast used in the electrodeless lamp has the open-circuit protection function so as to protect the MOSTs for a long time.
Description
(1) technical field
The circuit that the invention belongs to the low frequency electrodeless electronic ballast for fluoresent lamp improves, and relates to a kind of low frequency electrodeless lamp drive circuit with open-circuit-protection.
(2) background technology
Electric ballast is widely adopted in the application of electrodeless florescent lamp, and the electric ballast of present most of manufacturer production does not all have the fluorescent tube open loop protection circuit, causes the electric ballast that causes because of the fluorescent tube open circuit to burn easily.The circuit of the fluorescent tube open-circuit-protection that possesses of some manufacturer production is to adopt the electric current that detects output choke 1-11 to realize in addition; this method is under the situation of fluorescent tube open circuit; short time work can play a protective role; but, can cause that equally metal-oxide-semiconductor 1-6,1-7 that slab bridge drives burn when being in fluorescent tube open-circuit condition following time for a long time.
(3) summary of the invention
The present invention provides the low frequency electrodeless lamp drive circuit with open-circuit-protection of a kind of good reliability, long service life in order to remedy the deficiencies in the prior art.
The present invention is achieved through the following technical solutions:
Low frequency electrodeless lamp drive circuit with open-circuit-protection of the present invention, its special character is: comprise the electromagnetic interface filter that connects successively, rectifier bridge and pfc circuit, also be connected with undervoltage detection circuit between rectifier bridge and the pfc circuit, first output of pfc circuit connects first resistance successively, choke, the coupling coil of electrodeless lamp, the input that connects pfc circuit behind second resistance, the output of second resistance is ground connection behind polar capacitor also, second output of pfc circuit connects the input of half-bridge controller, the output of half-bridge controller connects first metal-oxide-semiconductor and second metal-oxide-semiconductor in parallel, an output termination high level of first metal-oxide-semiconductor, another output connects an output of second metal-oxide-semiconductor, be connected simultaneously the input of choke behind the 3rd resistance of parallel connection and first electric capacity, another output of second metal-oxide-semiconductor is connected the coupling coil two ends of electrodeless lamp respectively through second electric capacity and the 3rd electric capacity; Utilize the coupling coil series connection of first resistance, second resistance and electrodeless lamp, form the startup loop of pfc circuit.
The invention has the beneficial effects as follows, when the fluorescent tube open circuit situation occurring, pfc circuit is quit work, entire circuit is not worked, thereby play the purpose of long-term protection metal-oxide-semiconductor.The present invention makes the electric ballast of low frequency electrodeless lamp possess open circuit protecting function, has increased the unfailing performance and the practicality of electric ballast, has prolonged useful life.
(4) description of drawings
Fig. 1 is for adopting electric ballast block diagram of the present invention.Schematic diagram when Fig. 2 opens a way for fluorescent tube.
Among the figure, the coupling coil of the electrodeless lamp of L, 1-1 electromagnetic interface filter, the 1-2 rectifier bridge, 1-3 pfc circuit, 1-4 half-bridge driven controller, the 1-5 undervoltage detection circuit, 1-6 first metal-oxide-semiconductor, 1-7 second metal-oxide-semiconductor, 1-8 the 3rd resistance, the 1-11 choke, 1-12 second electric capacity, 1-9 first electric capacity, 1-13 the 3rd electric capacity, 1-10 first resistance, 1-14 second resistance, 1-15 polar capacitor.
(5) embodiment
Accompanying drawing is a kind of specific embodiment of the present invention.
Low frequency electrodeless lamp drive circuit with open-circuit-protection of the present invention, comprise the electromagnetic interface filter 1-1 that connects successively, rectifier bridge 1-2 and pfc circuit 1-3, also be connected with undervoltage detection circuit 1-5 between rectifier bridge and the PFC circuit of power factor correction, first output of pfc circuit connects the first resistance 1-10 successively, choke 1-11, the coupling coil L of electrodeless lamp, the input that connects pfc circuit behind the second resistance 1-14, the output of the second resistance 1-14 is ground connection behind polar capacitor 1-15 also, second output of pfc circuit connects the input of half-bridge controller 1-4, the output of half-bridge controller connects the first metal-oxide-semiconductor 1-6 and the second metal-oxide-semiconductor 1-7 in parallel, an output termination high level of first metal-oxide-semiconductor, another output connects the output of the second metal-oxide-semiconductor 1-7, be connected simultaneously the input of choke 1-11 behind the 3rd resistance 1-8 of parallel connection and the first electric capacity 1-9, another output of the second metal-oxide-semiconductor 1-7 is connected the coupling coil L two ends of electrodeless lamp respectively through the second electric capacity 1-12 and the 3rd electric capacity 1-13; Utilize the coupling coil L series connection of the first resistance 1-10, the second resistance 1-14 and electrodeless lamp, form the startup loop of pfc circuit 1-3.
Low frequency electrodeless lamp drive circuit with open-circuit-protection of the present invention utilizes the coupling coil L series connection of the first resistance 1-10, the second resistance 1-14 and electrodeless lamp, and forming circuit of power factor correction is the startup loop of pfc circuit 1-3.Before starting, fluorescent tube provides startup potential energy for pfc circuit 1-3, make pfc circuit 1-3 operate as normal, for providing stable 400V direct voltage and stable 13.5V direct voltage, the half-bridge drive circuit first metal-oxide-semiconductor 1-6, the second metal-oxide-semiconductor 1-7 give half-bridge driven controller (being the half-bridge driven control module) 1-4 power supply.After fluorescent tube starts, form the loop through the capacitance first electric capacity 1-9, the 3rd electric capacity 1-13 and choke 1-11, fluorescent tube coupling coil L by the high-frequency ac current of the half-bridge drive circuit first metal-oxide-semiconductor 1-6, second metal-oxide-semiconductor 1-7 output.When fluorescent tube is opened a way (electrodeless lamp is the place in circuit output not); the startup loop that pfc circuit 1-3 does not form through resistance 1-10,1-14; so pfc circuit is not worked; not having the direct voltage of 13.5V to supply with half-bridge controller 1-4(half-bridge controller 1-4 power supply is provided by the auxiliary winding of pfc circuit inductance); so half-bridge drive circuit metal-oxide-semiconductor 1-6,1-7 are in cut-off state; metal-oxide-semiconductor 1-6,1-7 do not have electric current to pass through, thereby play the metal-oxide-semiconductor 1-6 of protection half-bridge, the effect of 1-7.
Electromagnetic interface filter 1-1, rectifier bridge 1-2, pfc circuit 1-3, half-bridge driven controller 1-4, undervoltage detection circuit 1-5, metal-oxide-semiconductor is existing product.
Claims (1)
1. low frequency electrodeless lamp drive circuit with open-circuit-protection, it is characterized in that: comprise the electromagnetic interface filter that connects successively, rectifier bridge and pfc circuit, also be connected with undervoltage detection circuit between rectifier bridge and the pfc circuit, first output of pfc circuit connects first resistance successively, choke, the coupling coil of electrodeless lamp, the input that connects pfc circuit behind second resistance, the output of second resistance is ground connection behind polar capacitor also, second output of pfc circuit connects the input of half-bridge controller, the output of half-bridge controller connects first metal-oxide-semiconductor and second metal-oxide-semiconductor in parallel, an output termination high level of first metal-oxide-semiconductor, another output connects an output of second metal-oxide-semiconductor, be connected simultaneously the input of choke behind the 3rd resistance of parallel connection and first electric capacity, another output of second metal-oxide-semiconductor is connected the coupling coil two ends of electrodeless lamp respectively through second electric capacity and the 3rd electric capacity; Utilize the coupling coil series connection of first resistance, second resistance and electrodeless lamp, form the startup loop of pfc circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105699476A CN102088814B (en) | 2010-12-02 | 2010-12-02 | Low-frequency electrodeless lamp drive circuit with open-circuit protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105699476A CN102088814B (en) | 2010-12-02 | 2010-12-02 | Low-frequency electrodeless lamp drive circuit with open-circuit protection function |
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| Publication Number | Publication Date |
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| CN102088814A CN102088814A (en) | 2011-06-08 |
| CN102088814B true CN102088814B (en) | 2013-07-31 |
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| CN2010105699476A Expired - Fee Related CN102088814B (en) | 2010-12-02 | 2010-12-02 | Low-frequency electrodeless lamp drive circuit with open-circuit protection function |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102573247A (en) * | 2011-11-16 | 2012-07-11 | 上海浪腾电子科技有限公司 | Low-temperature starting circuit of electrodeless lamp ballast and use method |
| CN102751166B (en) * | 2012-06-13 | 2014-12-31 | 浙江科视电子技术有限公司 | Integrated electrodeless lamp |
| CN102931049B (en) * | 2012-10-18 | 2016-04-06 | 杭州新叶光电工程技术有限公司 | A kind of compact electrodeless fluorescent lamp |
| CN110943609B (en) * | 2018-09-25 | 2022-01-21 | 台达电子工业股份有限公司 | Power module |
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| CN101494938A (en) * | 2009-02-19 | 2009-07-29 | 英飞特电子（杭州）有限公司 | Centralization type light change circuit for LED illuminating system |
| CN201294668Y (en) * | 2008-11-13 | 2009-08-19 | 李名酉 | Metal halide, high-pressure sodium lamp and electric ballast of high-power florescent lamp |
| CN201438776U (en) * | 2009-04-16 | 2010-04-14 | 永磁电子（东莞）有限公司 | High-frequency generator circuit of electrodeless lamp |
| CN201491354U (en) * | 2009-09-09 | 2010-05-26 | 深圳市恩同光电科技开发有限公司 | Electronic rectifier circuit and electrodeless lamp |
Family Cites Families (3)
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|---|---|---|---|---|
| JP4186801B2 (en) * | 2003-11-25 | 2008-11-26 | 松下電工株式会社 | Electrodeless discharge lamp lighting device and electrodeless discharge lamp device |
| CN201393337Y (en) * | 2008-11-27 | 2010-01-27 | 常州菲尔普照明电器有限公司 | Electrodeless lamp ballast circuit with intelligent control interface |
| CN101820714B (en) * | 2010-04-22 | 2012-10-17 | 上海电机学院 | Start protection and intelligent control interface circuit for low frequency electrodeless lamp |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201294668Y (en) * | 2008-11-13 | 2009-08-19 | 李名酉 | Metal halide, high-pressure sodium lamp and electric ballast of high-power florescent lamp |
| CN101494938A (en) * | 2009-02-19 | 2009-07-29 | 英飞特电子（杭州）有限公司 | Centralization type light change circuit for LED illuminating system |
| CN201438776U (en) * | 2009-04-16 | 2010-04-14 | 永磁电子（东莞）有限公司 | High-frequency generator circuit of electrodeless lamp |
| CN201491354U (en) * | 2009-09-09 | 2010-05-26 | 深圳市恩同光电科技开发有限公司 | Electronic rectifier circuit and electrodeless lamp |
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| CN102088814A (en) | 2011-06-08 |
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Granted publication date: 20130731 Termination date: 20161202 |