CN103561531A - Electrodeless lamp ballast - Google Patents
Electrodeless lamp ballast Download PDFInfo
- Publication number
- CN103561531A CN103561531A CN201310597141.1A CN201310597141A CN103561531A CN 103561531 A CN103561531 A CN 103561531A CN 201310597141 A CN201310597141 A CN 201310597141A CN 103561531 A CN103561531 A CN 103561531A
- Authority
- CN
- China
- Prior art keywords
- circuit
- output
- electrodeless lamp
- light modulation
- bridge
- 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.)
- Pending
Links
Images
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
The invention provides an electrodeless lamp ballast which comprises an EMI filter circuit, a rectifier, a PFC circuit, a half-bridge inverter circuit, an output stage circuit, a half-bridge driving circuit, a transformer isolating circuit and a single chip microcomputer control circuit. The EMI filter circuit receives an alternating-current input signal, the rectifier is connected with the output end of the EMI filter circuit, the PFC circuit is connected with the output end of the rectifier, the half-bridge inverter circuit is connected with the output end of the PFC circuit, the output stage circuit is connected with the output end of the half-bridge inverter circuit, the half-bridge driving circuit is connected with the half-bridge inverter circuit, the transformer isolating circuit converts a received dimming direct-current input signal into an isolated dimming direct-current output signal, and the single chip microcomputer control circuit is connected with the transformer isolating circuit and the half-bridge inverter circuit. A PWM square signal with the variable duty ratio is generated according to the dimming direct-current output signal and used for controlling the half-bridge inverter circuit and the half-bridge driving circuit to be turned on or turned off. According to the electrodeless lamp ballast, the human body safety can be effectively protected, the ballast is protected, and noise and stroboflash do not exist in an electrodeless lamp tube in the dimming process.
Description
Technical field
The present invention relates to electronic ballast for electrodeless lamp technology, relate in particular to a kind of electronic ballast for electrodeless lamp of normally lighting a lamp with light modulation that integrates.
Background technology
Non-polarized lamp is as the illuminating product of a kind of long-life, non-maintaining, high light efficiency and high-color rendering, by domestic and international market, accepted extensively, Non-polarized lamp product all has remarkable result in factory floor illumination, road/tunnel illumination and light projector floodlighting engineering.
The electromagnetic wave coupling that Non-polarized lamp is launched radio-frequency region by high frequency magnetic core excites the discharging substance (as mercury atom) in fluorescent tube, and then the ultraviolet ray (for example ultraviolet ray of 253.7nm) that mercury atom is launched can effectively excite the light of three primary colors or other spectrum components to throw light on.Because Non-polarized lamp itself does not have electrode, thereby can guarantee that it for example, under long-term (5 years or longer time) service condition, still possess stable, without features such as replacements.
Non-polarized lamp drives with electronic ballast for electrodeless lamp conventionally, in prior art, conventionally adopt PWM square wave to control and drive the mode of chip concussion triangular wave end to carry out light modulation to Non-polarized lamp, but which exists potential safety hazard.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of electronic ballast for electrodeless lamp, adopts single chip machine controlling circuit to carry out brightness adjustment control, and light modulation direct-flow input signal and ballast control circuit are isolated safely, can effectively protect human-body safety, protection ballast.
For solving the problems of the technologies described above, the invention provides a kind of electronic ballast for electrodeless lamp, comprising:
EMI filter circuit, receives ac input signal;
Rectifier, is connected with the output of described EMI filter circuit;
Pfc circuit, is connected with the output of described rectifier;
Half-bridge inversion circuit, is connected with the output of described pfc circuit;
Output-stage circuit, is connected with the output of described half-bridge inversion circuit;
Half-bridge drive circuit, is connected with described half-bridge inversion circuit;
Transformer isolation circuit, is converted into the light modulation direct-flow input signal receiving the light modulation direct-flow output signal of isolation, and this light modulation direct-flow output signal is directly proportional to light modulation direct-flow input signal;
Single chip machine controlling circuit, be connected with half-bridge inversion circuit with described transformation buffer circuit, the PWM square-wave signal that produces variable duty ratio according to described light modulation direct-flow output signal, this PWM square-wave signal is used for controlling described half-bridge inversion circuit and half-bridge drive circuit work or shutoff.
According to one embodiment of present invention, described single chip machine controlling circuit comprises A/D converter, for described light modulation direct-flow output signal is sampled.
According to one embodiment of present invention, the PWM square-wave signal of described single chip machine controlling circuit output has fixing frequency.
According to one embodiment of present invention, the frequency of described PWM square-wave signal is 20KHz.
According to one embodiment of present invention, this electronic ballast of electrodeless lamp also comprises: abnormal protection sample circuit, is connected with output and the described half-bridge drive circuit of described output-stage circuit.
According to one embodiment of present invention, described single chip machine controlling circuit and half-bridge drive circuit share same power supply.
Compared with prior art, the present invention has the following advantages:
The electronic ballast for electrodeless lamp of the embodiment of the present invention adopts transformer isolation circuit light modulation direct-flow input signal to be converted into the light modulation direct-flow output signal of isolation; single chip machine controlling circuit produces the PWM square-wave signal of variable duty ratio according to this light modulation direct-flow output signal; thereby control work and the shutoff of half-bridge inversion circuit and half-bridge drive circuit; light modulation direct-flow input signal and ballast control circuit are isolated safely; can effectively protect human-body safety, protection ballast.
In addition, light modulation direct-flow input signal and ballast control circuit are isolated safely, make single chip circuit power supply can link together reliably with the power supply ground of half-bridge drive circuit, single chip machine controlling circuit and half-bridge drive circuit can be used a power supply jointly, without providing insulating power supply to single chip machine controlling circuit separately.
In addition, the PWM square-wave signal that the single chip machine controlling circuit of the embodiment of the present invention produces adopts 20KHZ frequency, compares fluorescent tube noiselessness stroboscopic in light modulation process with traditional electrodeless lamp dimming mode.
Accompanying drawing explanation
Fig. 1 is the structural representation of the electronic ballast for electrodeless lamp of the embodiment of the present invention.
Embodiment
Below in conjunction with specific embodiments and the drawings, the invention will be further described, but should not limit the scope of the invention with this.
With reference to figure 1, the electronic ballast for electrodeless lamp of the present embodiment comprises: EMI filter circuit 101, rectifier 102, pfc circuit 103, half-bridge inversion circuit 104, output-stage circuit 105, abnormal protection sample circuit 106, half-bridge drive circuit 107, single chip machine controlling circuit 108 and transformer isolation circuit 109.Wherein, half-bridge drive circuit 107 can be the half-bridge driven chip of various appropriate configuration in prior art.
Furthermore, electromagnetic interference (EMI) filter circuit 101 is for receiving outside ac input signal; Rectifier 102 is connected with the output of EMI filter circuit 101; Power factor correction (PFC) circuit 103 is connected with the output of rectifier 102; Half-bridge inversion circuit 104 is connected with the output of pfc circuit 103; Output-stage circuit 105 is connected with the output of half-bridge inversion circuit 104; Half-bridge drive circuit 107 is connected with half-bridge inversion circuit 104; Transformer isolation circuit 109 is converted into the light modulation direct-flow input signal receiving the light modulation direct-flow output signal of isolation, and this light modulation direct-flow output signal is directly proportional to light modulation direct-flow input signal; Single chip machine controlling circuit, 108 are connected with half-bridge inversion circuit 104 with transformation buffer circuit 109, according to this light modulation direct-flow output signal, produce the PWM square-wave signal of variable duty ratio, this PWM square-wave signal is used for controlling half-bridge inversion circuit 104 and half-bridge drive circuit 107 work or turn-offs; Abnormal protection sample circuit 106 is connected with output and the half-bridge drive circuit 107 of output-stage circuit 105; The output of output-stage circuit 105 is also configured to be connected with electrodeless lamp tube 100, for driving electrodeless lamp tube 100.
Wherein, single chip machine controlling circuit 108 can comprise A/D converter, and for transformer isolation light modulation direct-flow output signal is sampled, the signal that sampling obtains transfers to single-chip microcomputer to process, to produce PWM square-wave signal.As a nonrestrictive example, the duty ratio of this PWM square-wave signal is directly proportional to the amplitude of light modulation direct-flow output signal.In addition, when PWM square-wave signal is high level, half-bridge inversion circuit 104 and half-bridge drive circuit 107 work; When PWM square-wave signal is low level, half-bridge inversion circuit 104 and half-bridge drive circuit 107 turn-off.
Preferably, the PWM square-wave signal of single chip machine controlling circuit 108 outputs has fixing frequency.The calibration of PWM square-wave signal is 20KHz, to avoid the noise stroboscopic in light modulation process.Certainly, it will be appreciated by those skilled in the art that 20KHz, only for preferably, can also adopt other suitable frequencies.
In addition, single chip machine controlling circuit 108 can share same power supply with half-bridge drive circuit 107, without extra power supply.
At a nonrestrictive example, single chip machine controlling circuit 108 can also be exported the second road PWM square-wave signal, frequency 30KHz for example, amplitude 5V, the PWM square-wave signal of duty ratio 50%, this the second road PWM square-wave signal (is for example greater than 10V) and transfers to the secondary winding output of transformer isolation circuit 109 after triode VT1 voltage amplification, this secondary winding output produces sinusoidal wave through LC resonant selecting frequency circuit, sinusoidal wave for example, after over commutation (diode halfwave rectifier), the light modulation direct-flow output signal that the light modulation direct-flow input signal that generation receives with the armature winding of transformer buffer circuit 109 (being for example 0-10V) is directly proportional linear.Wherein, triode VT1 supply power voltage can be same road with the supply power voltage VCC2 of half-bridge drive circuit 107, as long as this supply power voltage VCC2 fixes, when the light modulation direct-flow input signal within the scope of 0-10V is inputted, the magnitude range of the output voltage of transformer isolation circuit 109 is fixed.
The operation principle of the electronic ballast for electrodeless lamp of the present embodiment is as follows: when AC power is connected, electronic ballast for electrodeless lamp is normally lit a lamp; Transformer isolation circuit 109 receives light modulation direct-flow input signal, by the second road square-wave signal of sampling single chip machine controlling circuit 108 outputs, light modulation direct-flow input signal is converted into the light modulation direct-flow output signal of isolation, the light modulation direct-flow output signal of isolation and the voltage swing of light modulation direct-flow input signal are proportional; A/D converter in single chip machine controlling circuit 108 (ADC) is by detecting the size of transformer isolation circuit 109 output voltages, and output frequency is fixed, the PWM square-wave signal of variable duty ratio; When the PWM square-wave signal of this variable duty ratio is low level, turn-off half-bridge drive circuit 107, turn-off half-bridge inversion circuit 104 simultaneously; When this PWM square-wave signal is high level, half-bridge drive circuit 107 work, half-bridge inversion circuit 104 work; By the duty ratio size (being the ADC sampled voltage size of control single chip computer control circuit 108) of effective control PWM square-wave signal, also be the length of low and high level, the light modulation power that can obtain wanting, the PWM square-wave signal duty ratio of output is larger, power is just larger, otherwise power is less.Single chip machine controlling circuit 108 can be by the size of internal circuit or default program control ADC voltage, and then controls brightness adjustment control input voltage size.
The technical scheme that adopts the present embodiment, the dimming scope of electronic ballast for electrodeless lamp can reach 30%～100%.
To sum up, the electronic ballast for electrodeless lamp of the present embodiment is compared with traditional dimming ballast of electrodeless lamp, adopt single chip machine controlling circuit to carry out brightness adjustment control, not use PWM square wave to control and drive chip concussion triangular wave end, but adopt the mode of turn-offing half-bridge driven chip and half-bridge inversion circuit to realize, light modulation direct-flow input signal and ballast control circuit are isolated safely, can effectively protect human-body safety, protection ballast; And electrodeless lamp tube noiselessness stroboscopic in light modulation process.
Although the present invention with preferred embodiment openly as above; but it is not for limiting the present invention; any those skilled in the art without departing from the spirit and scope of the present invention; can make possible change and modification, so protection scope of the present invention should be as the criterion with the scope that the claims in the present invention were defined.
Claims (6)
1. an electronic ballast for electrodeless lamp, comprising:
EMI filter circuit, receives ac input signal;
Rectifier, is connected with the output of described EMI filter circuit;
Pfc circuit, is connected with the output of described rectifier;
Half-bridge inversion circuit, is connected with the output of described pfc circuit;
Output-stage circuit, is connected with the output of described half-bridge inversion circuit;
Half-bridge drive circuit, is connected with described half-bridge inversion circuit;
It is characterized in that, also comprise:
Transformer isolation circuit, is converted into the light modulation direct-flow input signal receiving the light modulation direct-flow output signal of isolation, and this light modulation direct-flow output signal is directly proportional to light modulation direct-flow input signal;
Single chip machine controlling circuit, be connected with half-bridge inversion circuit with described transformation buffer circuit, the PWM square-wave signal that produces variable duty ratio according to described light modulation direct-flow output signal, this PWM square-wave signal is used for controlling described half-bridge inversion circuit and half-bridge drive circuit work or shutoff.
2. electronic ballast for electrodeless lamp according to claim 1, is characterized in that, described single chip machine controlling circuit comprises A/D converter, for described light modulation direct-flow output signal is sampled.
3. electronic ballast for electrodeless lamp according to claim 1, is characterized in that, the PWM square-wave signal of described single chip machine controlling circuit output has fixing frequency.
4. electronic ballast for electrodeless lamp according to claim 3, is characterized in that, the frequency of described PWM square-wave signal is 20KHz.
5. electronic ballast for electrodeless lamp according to claim 1, is characterized in that, also comprises: abnormal protection sample circuit, is connected with output and the described half-bridge drive circuit of described output-stage circuit.
6. electronic ballast for electrodeless lamp according to claim 1, is characterized in that, described single chip machine controlling circuit and half-bridge drive circuit share same power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310597141.1A CN103561531A (en) | 2013-11-22 | 2013-11-22 | Electrodeless lamp ballast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310597141.1A CN103561531A (en) | 2013-11-22 | 2013-11-22 | Electrodeless lamp ballast |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103561531A true CN103561531A (en) | 2014-02-05 |
Family
ID=50015632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310597141.1A Pending CN103561531A (en) | 2013-11-22 | 2013-11-22 | Electrodeless lamp ballast |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103561531A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104797065A (en) * | 2015-04-10 | 2015-07-22 | 浙江宇光照明科技有限公司 | Electrodeless lamp circuit |
| CN106538055A (en) * | 2014-05-09 | 2017-03-22 | 奥斯兰姆施尔凡尼亚公司 | Synchronized PWM-dimming with random phase |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2636585Y (en) * | 2003-06-13 | 2004-08-25 | 龙裕斌 | High performance fully digital controlled dimming electron ballast |
| CN1805645A (en) * | 2005-11-29 | 2006-07-19 | 哈尔滨工业大学 | Electronic ballast applicable to 400V/600W high voltage sodium lamps for agricultural use |
| CN101272653A (en) * | 2007-03-19 | 2008-09-24 | 余启发 | Digital intelligent electric power of electromagnetic induction lamp |
| CN201153344Y (en) * | 2008-01-10 | 2008-11-19 | 合肥大明电子科技有限公司 | Intelligent light modulating electronic ballast |
| CN201267050Y (en) * | 2008-10-09 | 2009-07-01 | 无锡久顺电器有限公司 | Electronic light regulator |
| CN201590942U (en) * | 2009-11-25 | 2010-09-22 | 中国电子科技集团公司第五十二研究所 | Electronic ballast of FM (frequency modulation) light-dimming fluorescent lamp |
| CN201869429U (en) * | 2010-09-01 | 2011-06-15 | 孝感市惠维照明电器有限责任公司 | HID electronic ballast with functions for HF half-bridge boosting output and NC dimming |
| CN201928502U (en) * | 2011-01-20 | 2011-08-10 | 南京云泰电气制造有限公司 | Dimmer for electroless lamp |
| CN202103927U (en) * | 2011-05-18 | 2012-01-04 | 东南大学 | Light-adjustable gas discharge lamp electronic ballast |
| CN103002647A (en) * | 2012-12-13 | 2013-03-27 | 张家港智能电力研究院有限公司 | Intelligent electronic ballast |
| CN203086833U (en) * | 2012-11-28 | 2013-07-24 | 张家港智能电力研究院有限公司 | Street lamp electronic intelligent ballast |
| CN203590573U (en) * | 2013-11-22 | 2014-05-07 | 上海宏源照明电器有限公司 | Electrodeless lamp ballast |
-
2013
- 2013-11-22 CN CN201310597141.1A patent/CN103561531A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2636585Y (en) * | 2003-06-13 | 2004-08-25 | 龙裕斌 | High performance fully digital controlled dimming electron ballast |
| CN1805645A (en) * | 2005-11-29 | 2006-07-19 | 哈尔滨工业大学 | Electronic ballast applicable to 400V/600W high voltage sodium lamps for agricultural use |
| CN101272653A (en) * | 2007-03-19 | 2008-09-24 | 余启发 | Digital intelligent electric power of electromagnetic induction lamp |
| CN201153344Y (en) * | 2008-01-10 | 2008-11-19 | 合肥大明电子科技有限公司 | Intelligent light modulating electronic ballast |
| CN201267050Y (en) * | 2008-10-09 | 2009-07-01 | 无锡久顺电器有限公司 | Electronic light regulator |
| CN201590942U (en) * | 2009-11-25 | 2010-09-22 | 中国电子科技集团公司第五十二研究所 | Electronic ballast of FM (frequency modulation) light-dimming fluorescent lamp |
| CN201869429U (en) * | 2010-09-01 | 2011-06-15 | 孝感市惠维照明电器有限责任公司 | HID electronic ballast with functions for HF half-bridge boosting output and NC dimming |
| CN201928502U (en) * | 2011-01-20 | 2011-08-10 | 南京云泰电气制造有限公司 | Dimmer for electroless lamp |
| CN202103927U (en) * | 2011-05-18 | 2012-01-04 | 东南大学 | Light-adjustable gas discharge lamp electronic ballast |
| CN203086833U (en) * | 2012-11-28 | 2013-07-24 | 张家港智能电力研究院有限公司 | Street lamp electronic intelligent ballast |
| CN103002647A (en) * | 2012-12-13 | 2013-03-27 | 张家港智能电力研究院有限公司 | Intelligent electronic ballast |
| CN203590573U (en) * | 2013-11-22 | 2014-05-07 | 上海宏源照明电器有限公司 | Electrodeless lamp ballast |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106538055A (en) * | 2014-05-09 | 2017-03-22 | 奥斯兰姆施尔凡尼亚公司 | Synchronized PWM-dimming with random phase |
| CN106538055B (en) * | 2014-05-09 | 2018-10-26 | 奥斯兰姆施尔凡尼亚公司 | Synchronization PWM light modulations with random phase |
| CN104797065A (en) * | 2015-04-10 | 2015-07-22 | 浙江宇光照明科技有限公司 | Electrodeless lamp circuit |
| CN104797065B (en) * | 2015-04-10 | 2018-05-01 | 浙江宇光照明科技有限公司 | A kind of nonpolar lamp circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2012049273A (en) | Dc power supply device and led lamp system | |
| JP2017526153A (en) | Electrodeless fluorescent lamp ballast drive circuit and resonance circuit with added filter and protection | |
| EP1327382B1 (en) | A system and method for employing pulse width modulation for reducing vertical segregation in a gas discharge lamp | |
| CN203590573U (en) | Electrodeless lamp ballast | |
| JP6373947B2 (en) | Lighting device and system in which dimmer and driver have electrically insulating structure | |
| CN102611316A (en) | Flyback converter controlled constant-current output circuit and method | |
| CN103561531A (en) | Electrodeless lamp ballast | |
| CN111918447A (en) | Adaptive dimming driving system | |
| CN101969722B (en) | LED drive circuit and LED lamp | |
| CN207665264U (en) | A kind of electric ballast and Non-polarized lamp | |
| CN211297065U (en) | PWM isolation dimming driving power circuit with NFC function | |
| CN102271441B (en) | Constant-current control LED (light-emitting diode) driving circuit | |
| CN204836755U (en) | Use electrodeless fluorescence lamp of adjusting luminance of frequency generator control duty cycle | |
| JP2009005304A (en) | Illumination system | |
| CN202738233U (en) | Universal electronic ballast | |
| CN202565166U (en) | Fly-back converter control constant current output circuit | |
| CN101820714B (en) | Start protection and intelligent control interface circuit for low frequency electrodeless lamp | |
| KR100675515B1 (en) | A dimmer of electrodeless induction discharge lamp | |
| CN203574921U (en) | Dimmable electrodeless lamp driving circuit | |
| CN104025718B (en) | Field emission light source power supply | |
| CN201928502U (en) | Dimmer for electroless lamp | |
| KR200426136Y1 (en) | Electrodeless fluorescent lamp using magnetic induction | |
| CN109743818A (en) | LED spotlight circuit | |
| CN203251492U (en) | Independent frequency output circuit capable of inhibiting electrodeless lamp electromagnetic wave interference | |
| CN202143282U (en) | Low frequency electroless lamp and control circuit thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140205 |