CN104540310A - Output resonant converter of ballast for plant light-compensating light and control method thereof - Google Patents
Output resonant converter of ballast for plant light-compensating light and control method thereof Download PDFInfo
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- CN104540310A CN104540310A CN201510019155.4A CN201510019155A CN104540310A CN 104540310 A CN104540310 A CN 104540310A CN 201510019155 A CN201510019155 A CN 201510019155A CN 104540310 A CN104540310 A CN 104540310A
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Abstract
The invention discloses an output resonant converter of a ballast for a plant light-compensating light and a control method of the output resonant converter, and belongs to the technical field of lighting control. By improving a traditional half-bridge resonant converter, a gain adjustment coil, an excite inductor and an output matching coil are additionally arranged on the original base, so that a resonant filtering network is formed, the voltage adjusting range is enlarged, clutter in the resonant network can be filtered out, and the switch conduction and radiated interference are reduced.
Description
Technical field
The present invention relates to a kind of export resonance converter and control method thereof of plant light compensation ballast for lamp, belong to lighting control technique field.
Background technology
Under agricultural modernization background, its special light filling equipment use is widelyd popularize, greenhouse plants is answered to produce light filling needs, some Lighting Inc release powerful plant illumination special lamp in the world, its bulb electrical equipment feature is pipe pressure scope is 175-330V, operating frequency range 100-200KHZ's, dimming scope requires within the scope of 50-110% adjustable, the standard-required of electromagnetic compatibility reaches the standard of civilian FCC, efficiency reaches 96%, and can power output adjustment etc. be carried out, this proposes quite high requirement to the design of ballast, at use high pressure, during high frequency voltage driving bulb, electromagnetic compatibility problem is a difficult problem for design electric ballast, in addition in power inverter, increase power density, the requirement reducing design size is more and more higher, switching frequency is improved in the urgent need to designer, reduce switching loss, realize soft switch conversion, Switching Power Supply is made to have higher efficiency.
Summary of the invention
For there being the defect of technology on overcoming, object of the present invention is intended to the output control method proposing the special bulb of a kind of agricultural, is a kind of special resonant network, to solve output matching bulb, possesses good unit for electrical property parameters and electromagnetic compatibility characteristic.
For achieving the above object, the present invention adopts following technical scheme:
A kind of export resonance converter of plant light compensation ballast for lamp and control method thereof, comprise resonant capacitance, resonance transformer, starting ignition electric capacity and load, gain-adjusted coil, magnetizing inductance and output matching coil is also provided with between starting ignition electric capacity and load, wherein, the two ends of magnetizing inductance and the two ends of starting ignition electric capacity are connected in parallel, and wherein one end of magnetizing inductance is also connected with one end of gain-adjusted coil; Output matching coil has four terminals, and wherein two terminals of homonymy are connected with load two ends, and two terminals of opposite side are connected with the other end of gain-adjusted coil and the other end of magnetizing inductance respectively.
Adopt the control method of the light compensating lamp of claim 1, comprise MCU, driven unit, isolation control switch, controlled resonant converter, voltage detection circuit and current detection circuit, MCU connects driven unit respectively, voltage detection circuit and current detection circuit, and control isolation control switch by driver module, and control controlled resonant converter by isolation control switch, the voltage and current that voltage detection circuit and current detection circuit are used for detecting starting ignition electric capacity two ends in controlled resonant converter respectively changes, and sampled data is transferred to MCU, and carry out regulating and controlling by MCU.
Because technique scheme is used, the present invention has following advantages:
The present invention by MCU programming generation square wave, and is become square-wave voltage, is exported, after resonance and filter network, solve its emc issue by square-wave generator; The turn ratio of gain-adjusted coil and magnetizing inductance can carry out the setting of voltage gain, meets the adjustment that output voltage is interior in a big way, and its operating frequency is stablized, and efficiency is high, and the change of light modulation output frequency is little.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of half bridge resonant transformer in prior art;
Fig. 2 is the invention process: the circuit diagram of 1 controlled resonant converter provided;
The light compensating lamp control principle schematic diagram that Fig. 3 provides for the embodiment of the present invention 2.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described:
Embodiment 1: shown in Fig. 1, Fig. 2:
The coupling of picture and text: resonant capacitance Cr, resonance transformer Lr, starting ignition electric capacity Ci, magnetizing inductance Lm, gain-adjusted coil Ls, output matching coil LF, load RO.
Traditional controlled resonant converter for light compensating lamp, comprise resonant capacitance, resonance transformer, starting ignition electric capacity and load, can find out in FIG, resonant capacitance, resonance transformer, starting ignition electric capacity series winding connect, and load is parallel to starting ignition electric capacity two ends.Like this under high frequency, high tension voltage drive, its emc issue is serious.For this reason, traditional controlled resonant converter is improved, as shown in Figure 2, gain-adjusted coil, magnetizing inductance and output matching coil is also being provided with between starting ignition electric capacity and load, wherein, the two ends of magnetizing inductance and the two ends of starting ignition electric capacity are connected in parallel, and wherein one end of magnetizing inductance is also connected with one end of gain-adjusted coil; Output matching coil has four terminals, and wherein two terminals of homonymy are connected with load two ends, and two terminals of opposite side are connected with the other end of gain-adjusted coil and the other end of magnetizing inductance respectively.Can be carried out the setting of voltage gain by the turn ratio adjusting gain-adjusted coil and magnetizing inductance, meet output voltage and adjust in a big way, and its resonance current is sinusoidal wave, exports as sine voltage.And square-wave voltage is applied to network, substantially only have sinusoidal current to allow and flow through resonant network, electric current lags behind the voltage putting on resonant network, the unlatching of guarantee switching tube is no-voltage, achieve soft commutation, therefore reduce noise and radiation, this resonant network can filter out clutter, reduces conduction and the radiated interference of switch.
Embodiment 2:
The coupling of picture and text: driver module DR, isolation control switch Q1 and Q2, resonant capacitance CR, resonance transformer LR, starting ignition electric capacity CI, gain-adjusted coil LS, magnetizing inductance LM, output matching coil LF, load LAMP, voltage sampling electric capacity CV, current sampling inductance L C.
As shown in Figure 3, adopt controlled resonant converter control principle drawing in embodiment 1, comprise MCU, driven unit, isolation control switch, controlled resonant converter, voltage detection circuit and current detection circuit, its operation principle is: MCU connects driven unit respectively, voltage detection circuit and current detection circuit, and control isolation control switch by driver module, and control controlled resonant converter by isolation control switch, the voltage and current that voltage detection circuit and current detection circuit are used for detecting starting ignition electric capacity two ends in controlled resonant converter respectively changes, and sampled data is transferred to MCU, and carry out regulating and controlling by MCU.
Specific as follows:
Controller contains the control MCU of a resonance, driven unit, its major function for arranging maximum resonance frequency, lowest resonant frequency, the detecting computing function of operating frequency and electric current and voltage, output packet exports containing the complementary duty of 2 50%, programmable Dead Time, to guarantee that Sofe Switch operates, the highest support 200KHZ driving frequency, soft start function, idle function, current detecting, the resonance control module of the functions such as output voltage detection, fault locking.
The aspect of resonance control module is the alternating drive signal that MCU internal side wave producer produces 50%, square-wave voltage Vd is produced by two connected isolation control switch Q1, Q2, square-wave generator is a half-bridge, isolation control switch Q1 upper end connects direct voltage, half-bridge mid point M connects the resonant capacitance in controlled resonant converter, and the load in controlled resonant converter is bulb.
Voltage detection circuit comprises voltage sampling electric capacity, and one end of described voltage sampling electric capacity connects the intersection of resonance transformer and starting ignition electric capacity, and the other end connects MCU, and its function is lighted a fire for collection and operating voltage VS inputs to MCU.
Current detection circuit comprises current sampling inductance, its function is that collection preheating and operating current CS input to MCU, controlled resonant converter is frequency modulation type PFM, its work initial condition is constant current, start electric current that rear sampled inductance inputs to MCU measuring circuit to carry out sampling and calculate, carry out invariable power management.
Light compensating lamp light modulation implementation is that MCU modulates the operating frequency of driving according to current sampling and DIM signal, to reach the function controlling resonance current, DIM regulates input to be analog signal, A/D is by MCU, reduce according to signal or strengthen the electric current regulating resonant network, full power is exported, if dim signal is 2.5V export half-power, the voltage in proportion relation that its export ratio and light modulation DIM export when its dim signal is 5V.
The present invention to be programmed generation square wave by MCU, and square wave is the driven switch Q1 of 50%, and Q2 produces square-wave voltage, and square-wave generator is a half-bridge, this driving voltage be connection be the direct current of 400-430V; By resonance transformer, resonant capacitance, gain-adjusted coil, the resonance of magnetizing inductance composition and filter network, the filter function of resonant network the principle that is similar to of let us first-harmonic can obtain the voltage gain of resonance, the multiple harmonic interference of output can be reduced again, its output voltage adjusts in a big way, and its resonance current is sinusoidal wave, exports as sine voltage, during exporting change, frequency change is less, and can realize Zero voltage transition in full-load range.
Isolation control switch employs resonance type soft switch topology, the conducting resistance of employing is low, parasitic capacitance and reverse recovery time little field effect transistor, working range is 100-200KHZ, thus makes Switching Power Supply have higher efficiency.When being operated in underloading, operating frequency can raise as maximum, and for making output voltage controlled, MCU is provided with the highest frequency, and realizes detecting real-time and ensured that operating state is controlled.Output frequency reduces close to resonance center frequeH when fully loaded, and circuit gain increases, and provides larger voltage and current to export the requirement on electric performance meeting load; When non-loaded, need lasting certain working pulse, reduce transformer magnetizing current as far as possible, reduce stand-by power consumption.Be operated in interval trigger state for overcoming problem MCU, make MOS closed condition after exporting a string little switch periods, operating frequency average is like this low, and average power consumption is little, enters lock-out state for a long time for output is then closed in zero load.
Above-described embodiment, only for technical conceive of the present invention and feature are described, its object is to person skilled in the art can be understood content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (2)
1. the export resonance variator of a plant light compensation ballast for lamp, comprise resonant capacitance, resonance transformer, starting ignition electric capacity and load, it is characterized in that, gain-adjusted coil, magnetizing inductance and output matching coil is also provided with between starting ignition electric capacity and load, wherein, the two ends of magnetizing inductance and the two ends of starting ignition electric capacity are connected in parallel, and wherein one end of magnetizing inductance is also connected with one end of gain-adjusted coil; Output matching coil has four terminals, and wherein two terminals of homonymy are connected with load two ends, and two terminals of opposite side are connected with the other end of gain-adjusted coil and the other end of magnetizing inductance respectively.
2. adopt the control method of the export resonance variator of claim 1, it is characterized in that, comprise MCU, driven unit, isolation control switch, controlled resonant converter, voltage detection circuit and current detection circuit, MCU connects driven unit respectively, voltage detection circuit and current detection circuit, and control isolation control switch by driver module, and control controlled resonant converter by isolation control switch, the voltage and current that voltage detection circuit and current detection circuit are used for detecting starting ignition electric capacity two ends in controlled resonant converter respectively changes, and sampled data is transferred to MCU, and carry out regulating and controlling by MCU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510019155.4A CN104540310B (en) | 2015-01-15 | 2015-01-15 | The export resonance converter and its control method of a kind of plant light compensation ballast for lamp |
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| CN201510019155.4A CN104540310B (en) | 2015-01-15 | 2015-01-15 | The export resonance converter and its control method of a kind of plant light compensation ballast for lamp |
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| CN104540310B CN104540310B (en) | 2017-06-16 |
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| JP2008218333A (en) * | 2007-03-07 | 2008-09-18 | Matsushita Electric Works Ltd | Discharge lamp lighting device and luminaire |
| CN102281047A (en) * | 2010-06-13 | 2011-12-14 | 深圳市英可瑞科技开发有限公司 | LLC (resonance inductor, magnetizing inductor and resonance capacitor) series resonance combined controller |
| CN202077251U (en) * | 2011-03-21 | 2011-12-14 | 杭州电子科技大学 | Half-bridge contravariant resonant circuit |
| CN103326587A (en) * | 2013-07-17 | 2013-09-25 | 潘海铭 | Light load control method and device of LLC (Liquid Level Control) resonant converter |
| CN203435214U (en) * | 2013-08-19 | 2014-02-12 | 北京富桦明电子有限公司 | Firing circuit of high intensity discharge lamp |
| CN203504848U (en) * | 2013-10-16 | 2014-03-26 | 潍坊恒信电器有限公司 | High-energy-saving plant growth xenon light supplementary lamp |
| CN204046908U (en) * | 2014-01-08 | 2014-12-24 | 启东市顺康电子科技有限公司 | For the single-key remote-controlled dimming ballast of plant light compensation |
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2015
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Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6118223A (en) * | 1997-01-27 | 2000-09-12 | Magnetek, Inc. | Power supply for discharge lamps with balanced resonant circuit |
| CN101091303A (en) * | 2004-11-29 | 2007-12-19 | 皇家飞利浦电子股份有限公司 | Multi-resonance converter |
| JP2006278063A (en) * | 2005-03-28 | 2006-10-12 | Matsushita Electric Works Ltd | Discharge lamp lighting device, lighting system, and luminaire |
| CN101132665A (en) * | 2006-08-25 | 2008-02-27 | 株式会社小糸制作所 | Discharge lamp lighting circuit |
| JP2008218333A (en) * | 2007-03-07 | 2008-09-18 | Matsushita Electric Works Ltd | Discharge lamp lighting device and luminaire |
| CN102281047A (en) * | 2010-06-13 | 2011-12-14 | 深圳市英可瑞科技开发有限公司 | LLC (resonance inductor, magnetizing inductor and resonance capacitor) series resonance combined controller |
| CN202077251U (en) * | 2011-03-21 | 2011-12-14 | 杭州电子科技大学 | Half-bridge contravariant resonant circuit |
| CN103326587A (en) * | 2013-07-17 | 2013-09-25 | 潘海铭 | Light load control method and device of LLC (Liquid Level Control) resonant converter |
| CN203435214U (en) * | 2013-08-19 | 2014-02-12 | 北京富桦明电子有限公司 | Firing circuit of high intensity discharge lamp |
| CN203504848U (en) * | 2013-10-16 | 2014-03-26 | 潍坊恒信电器有限公司 | High-energy-saving plant growth xenon light supplementary lamp |
| CN204046908U (en) * | 2014-01-08 | 2014-12-24 | 启东市顺康电子科技有限公司 | For the single-key remote-controlled dimming ballast of plant light compensation |
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Address after: 215143 Jiangsu city in Suzhou Province town of Xiangcheng District Wong Tai Pan Yang Industrial Park Road No. 16 spring Patentee after: At Suzhou power technology Limited by Share Ltd Address before: 215143 Jiangsu city in Suzhou Province town of Xiangcheng District Wong Tai Pan Yang Industrial Park Road No. 16 spring Patentee before: Lumlux Lighting (Suzhou) Inc. |
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