CN203327349U - Low frequency electrodeless lamp electronic ballast capable of automatically adjusting output frequency - Google Patents
Low frequency electrodeless lamp electronic ballast capable of automatically adjusting output frequency Download PDFInfo
- Publication number
- CN203327349U CN203327349U CN2013202715122U CN201320271512U CN203327349U CN 203327349 U CN203327349 U CN 203327349U CN 2013202715122 U CN2013202715122 U CN 2013202715122U CN 201320271512 U CN201320271512 U CN 201320271512U CN 203327349 U CN203327349 U CN 203327349U
- Authority
- CN
- China
- Prior art keywords
- circuit
- resistance
- point
- electric capacity
- output
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
The utility model discloses a low frequency electrodeless lamp electronic ballast capable of automatically adjusting an output frequency. A power source input protection circuit is connected on an alternate current power source, and an output terminal of the alternate current power source is connected with input terminals of a driving circuit and a half-bridge output circuit through a filtering circuit, a rectification circuit and a power factor correction circuit. An output terminal of the driving circuit is connected with another input terminal of the half-bridge output circuit, and the half-bridge output circuit is connected with coils of an electrodeless lamp through a resonance network circuit of the half-bridge output circuit. One feedback terminal of the resonance network circuit is connected with a signal feedback input terminal of a frequency automatic adjusting circuit of the driving circuit, and the other feedback terminal of the resonance network circuit is connected with a feedback signal input terminal of an abnormal protection circuit. A signal output terminal of the abnormal protection circuit is connected with an signal input terminal of the driving circuit. The low frequency electrodeless lamp electronic ballast is capable of adapting to the changes of parameters such as the distance between the electronic ballast and the electrodeless lamp and the changes of the output frequency of the electrodeless lamps after being turned on for a long time, so that work stability of the electrodeless lamp electronic ballast is improved.
Description
Technical field
The utility model relates to a kind of electronic ballast of low-frequency nonpolar lamp.
Background technology
Non-polarized lamp is a kind of new type light source, and it mainly is comprised of electric ballast, coupler, bulb foam three parts.Because the mode that has adopted electromagnetic induction makes gas discharge luminous, so it does not have the fragile parts such as filament.With conventional fluorescent lamps, compare, Non-polarized lamp is operated in upper frequency, has the longer life-span, and optical efficiency has had certain raising.Electronic ballast of electrodeless lamp, have another name called the Non-polarized lamp driving power, for electrodeless lamp bulb work provides high-frequency alternating current, to excite and to maintain Non-polarized lamp, normally moves, and be the core building block of stepless lamp system.The high-frequency current that electronic ballast of electrodeless lamp produces, at the luminous flux that improves light source, when improving luminous mass, also exists some problems.Because the life-span of electrodeless lamp bulb is longer, at some, special application places is as the street lamp of outdoor eminence, electrodeless lamp bulb in the situation that can normally use, is changed the electric ballast damaged and can be brought a large amount of maintenance costs, comprising the lease expenses of equipment machine, labour cost etc.Between existing electronic ballast of low-frequency nonpolar lamp and Non-polarized lamp, the output distance is generally between 0-1m, its output distance is too short, while as the ballast of the Non-polarized lamp by eminence, being placed in lower, output distance between itself and Non-polarized lamp lengthens far away, can cause like this frequency change of ballast output, the caused Non-polarized lamp had is build-up of luminance work normally, although the Non-polarized lamp that can make had works, it works and can cause the damage of ballast under long-time abnormal condition.And the low-frequency electronic ballast that existing market exists adopts integrated circuit (IC) chip to drive half-bridge circuit mostly, and driving signal frequency is fixed, the output services frequency is also thereupon fixing.For the fixing electric ballast of output frequency, after Non-polarized lamp is lighted for a long time, the variation of inner core parameter can cause the variation of electric ballast operating state, causes the variation of output frequency.Therefore, for the continuous demand that lengthens and constantly change of output distance between electronic ballast of electrodeless lamp and Non-polarized lamp with along with Non-polarized lamp is lighted the requirement that rear its output frequency changes for a long time, the development electric ballast of regulation output frequency automatically has great importance.
The utility model content
The purpose of this utility model solves the above-mentioned problems in the prior art exactly, provide a kind of along with the output isoparametric variation of distance between electric ballast and Non-polarized lamp and along with Non-polarized lamp is lighted the electronic ballast of low-frequency nonpolar lamp of regulation output frequency automatically that the variation of its output frequency afterwards can adapt to its variation automatically for a long time, this kind of ballast can be widely used in various particular surroundingss, also can give according to requirement of engineering the electrodeless lamp bulb power supply of different output distances.
For achieving the above object, technical solution of the present utility model is: a kind of electronic ballast of low-frequency nonpolar lamp of regulation output frequency automatically, and it comprises power supply input protection circuit, filter circuit, rectification circuit, circuit of power factor correction, comprise the drive circuit of frequency automatic circuit, comprise half-bridge output circuit and the abnormity protection circuit of resonant network circuit; Connect the power supply input protection circuit on AC power, its output is connected to the input of drive circuit and half-bridge output circuit after by filter circuit, rectification circuit and circuit of power factor correction, the output of drive circuit connects another input of half-bridge output circuit, and the half-bridge output circuit connects the coil of Non-polarized lamp by its resonant network circuit; Feedback end one tunnel of resonant network circuit connects the signal feedback input of the frequency automatic circuit in drive circuit; another road connects the feedback signal input of abnormity protection circuit, and the signal output part of abnormity protection circuit connects the signal input part of drive circuit.
Described drive circuit comprises frequency automatic circuit, transformer T3, resistance 2R1,2R2,2R3,2R4,2R9,2R10, diode 2D1 and 2D2; The frequency automatic circuit is comprised of resistance 2R5,2R6,2R7,2R8, electric capacity 2C1,2C2 and inductance 2L1; The half-bridge output circuit comprises field effect transistor 2Q1,2Q2, voltage stabilizing didoe 2VD1,2VD2,2VD3,2VD4, inductance 2L2 and resonant network circuit; The resonant network circuit comprises transformer T2, electric capacity 2C5 and 2C3;
The auxiliary winding one end ground connection of transformer T2, feedback end one tunnel is connected on electric capacity 2C2, after electric capacity 2C2 connects inductance 2L1, lead up to electric capacity 2C1 ground connection, another road is connected to the F end of the primary coil of transformer T3, the other end ground connection of the primary coil of transformer T3 after by resistance 2R5,2R6,2R7 and 2R8 in parallel; Transformer T3 has two secondary coils, the secondary coil G end of upper end is by being connected to the grid of field effect transistor 2Q1 after a road electric capacity 2C4 after resistance 2R10, another road is by resistance 2R9 with along connecing after diode 2VD1 the output that is connected to circuit of power factor correction, the output of circuit of power factor correction is also by after resistance 2R1,2R2, the electric capacity 2C6 of leading up to is connected to the A point, and another road is by resistance 2R3 and 2R4 ground connection; The drain electrode of the source electrode of field effect transistor 2Q1 and field effect transistor 2Q2 all is connected to the A point, and the secondary coil other end of transformer T3 upper end also is connected to the A point; The secondary coil of transformer T3 lower end and the secondary coil of upper end connect the same head end H end that A orders and connect the grid of field effect transistor 2Q2, other end ground connection by resistance 2R11; The A point is connected to an end of the main winding of transformer T2, ground connection after the other end one tunnel connection electric capacity 2C3 of this main winding, ground connection after the coil 2L2 of another road connection electric capacity 2C5 and Non-polarized lamp.
Power supply input protection circuit described above comprises piezo-resistance YMR, YMR1, YMR2, temperature safety tube F2, F3 and gas discharge tube GAS; The L live wire is connected to the B point after by temperature safety tube F2, and the N zero line is connected to the C point after by temperature safety tube F3; Be connected with piezo-resistance YMR between B point and C point, be connected to the end of gas discharge tube GAS after B point connection piezo-resistance YMR1, be connected to the end of gas discharge tube GAS after C point connection piezo-resistance YMR2, the other end ground connection of gas discharge tube GAS.
Abnormity protection circuit described above comprises diode 2D2,2D3 2D4, controllable silicon Q4, voltage stabilizing didoe 2VD5, electric capacity 2C7,2C8,2C9,2C10,2C11, resistance 2R12,2R13,2R14,2R15,2R16,2R17,2R18,2R19,2R20 and 2R21; Be connected to the input D point of abnormity protection circuit after resistance 2R12,2R13,2R14 and the 2R15 of the output of circuit of power factor correction by series connection, this input D point also is connected to the feedback end of the auxiliary winding of transformer T2; The secondary coil H end of transformer T3 lower end connects another input E point of abnormity protection circuit by another road after resistance 2R11, the D point is leaded up to ground connection after electric capacity 2C7 in parallel and resistance 2R17 along connecing after diode 2D2, and another road is along connecing after diode 2D3 by resistance 2R18, the contrary control utmost point that is connected to controllable silicon Q4 that connects after voltage stabilizing didoe 2VD5; Tie point between diode 2D3 and resistance 2R18 is by electric capacity 2C8 ground connection, by ground connection after resistance 2R19 in parallel and electric capacity 2C9, pass through ground connection after electric capacity 2C10 and resistance 2R20 on the tie point between the control utmost point of voltage stabilizing didoe 2VD5 and controllable silicon Q4 on tie point between resistance 2R18 and voltage stabilizing didoe 2VD5; The E point is along connecing the anode that diode 2D4Hou mono-tunnel is connected to controllable silicon Q4, another road by resistance 2R21 and electric capacity 2C11 after ground connection, the minus earth of controllable silicon Q4.
The output of described circuit of power factor correction is by thermistor 1TR output.
The utility model operation principle is: the civil power alternating current changes direct current into after filter circuit and rectification circuit, direct current is raised voltage by circuit of power factor correction, output to through drive circuit the half-bridge output circuit that comprises the resonant network circuit and light Non-polarized lamp, and maintain its normal operation.The power supply input protection circuit can provide protective effect to the overvoltage input of electrical network and the special circumstances such as surge current that produced by thunder and lightning.Abnormity protection circuit can detect the Non-polarized lamp state automatically, in the situation that open circuit and the lower lockable output of output voltage, now circuitry is in micro-loss state.In the utility model the power supply input protection circuit adopt two piezo-resistance YMR1 and YMR2 in parallel and be connected in series the circuit form of gas discharge tube GAS, and carry out backup protection when temperature safety tube F2 and F3 are installed pressure responsive resistor failure before every piezo-resistance YMR1 and YMR2.Filter circuit is to being input to electric ballast and carrying out filtering by the individual harmonic current that electronic ballast feeds back to output, control the EMI value, making it meet relevant national standard.Circuit of power factor correction is raised direct-current working volts, and the power factor of raising circuitry reaches more than 0.95.After DC-voltage supply, by two field effect transistor 2Q1 and the 2Q2 of drive circuit driven half-bridge output circuit, the half-bridge output circuit, according to the Non-polarized lamp loading condition, automatically carries out frequency sweep and reaches resonance frequency, and electrodeless lamp tube produces high pressure, lights Non-polarized lamp.Drive circuit adopts feedback to drive, and produce driving voltage by the self-oscillation mode, the utility model patent adopts the auxiliary winding feeding classification of transformer T2, select to set operating frequency by frequency automatic circuit in drive circuit, and carry out the output of driving voltage by EPC high frequency transformer T3.Abnormity protection circuit can detect output state, when the voltage protection collection terminal reaches operation voltage, drives controllable silicon Q4, stops the driving to field effect transistor 2Q1 and 2Q2.
The electronic ballast of low-frequency nonpolar lamp of the fixedly output frequency extensively existed with existing market is compared, the utility model can be according to the variation of Non-polarized lamp load parameter and output distance parameter, Auto-matching impedance network, and the driving frequency of inching field effect transistor 2Q1 and 2Q2.By design of the present utility model, make electronic ballast of electrodeless lamp output distance adjustable, and greatly improve the job stability of electronic ballast of electrodeless lamp.When load parameter changes, circuit automatic fine tuning output frequency reaches stable operating state again.Requiring to export in the lengthening distance situation, the resonant capacitance 2C3 that can suitably adjust output can reach stable operating state.The utility model can be applicable to the street lamp post input supply terminal, in the electric power centralized-control box of factories and miness illuminating lamp, waits special occasions in water in the far-end distribution box of light source.In the situation that ballast damages, only change ballast and get final product, reduced a large amount of maintenance costs.
The accompanying drawing explanation
Fig. 1 is circuit block diagram of the present utility model;
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with accompanying drawing and concrete example, the utility model is further described.
As depicted in figs. 1 and 2, the present embodiment comprise power supply input protection circuit, filter circuit, rectification circuit, circuit of power factor correction, comprise the frequency automatic circuit drive circuit, comprise half-bridge output circuit and the abnormity protection circuit of resonant network circuit.
Between L live wire and N zero line, input voltage is the alternating current that 220V, frequency are 50HZ; because output supply voltage is unstable; in superpotential situation, need be protected circuitry; the piezo-resistance YMR that wherein connects L live wire and N zero line is the excess voltage protection between L live wire and N zero line; YMR1 is overvoltage protection between L live wire and ground; YMR2 is the overvoltage protection between N zero line and ground wire; if have the thunderbolt situation; gas discharge tube GAS can provide the path of releasing for surge current, and the protection ballast can not damage because of thunderbolt.In the time of 2 temperature safety tube F2 and F3 welding must from YMR1 and YMR2 very close to and need straight line to weld, it provides backup protection for piezo-resistance YMR1, YMR2.The power supply input protection circuit is connected with filter circuit; while inputting because of civil power with the interference such as high order harmonic component a large amount of in electrical network; and the half-bridge output circuit can feed back to the humorous wave interference that supply network is produced by electric ballast self; differential mode interference between electric capacity 1C1,1C2 and 1C3 filtering L live wire and N zero line wherein; inductance 1L1,1L2, electric capacity 1C4 and 1C5 filtering L live wire and N zero line common mode disturbances over the ground; the processing of circuit after filtering, export comparatively pure alternating current.Filter circuit is connected with rectification circuit, and the effect by rectifier bridge 1B1, change alternating current into direct current, and 1C6,1C7 carry out filtering to direct current.For improving power factor; improve power consumption efficiency; after alternating current changes direct current into; the access power factor correcting circuit; power factor drives chip 33232 can automatically detect voltage and the current value of input and output; and drive the grid of field effect transistor 1Q1 in good time, and adjust input current value, wherein 1TR carries out current-limiting protection to the electric ballast cold start.By the adjustment of power factor circuit, can suitably raise the direct current supply bus voltage, contribute to the startup of low frequency electrodeless lamp.Drive circuit is that the Non-polarized lamp normal operation improves high-frequency alternating current, after the direct voltage input, by drive circuit, drives respectively two field effect transistor 2Q1 and 2Q2 alternate conduction and shutoff, and its curent change that outputs to the resonant network circuit is high-frequency alternating current.Two voltage stabilizing didoes of 2VD1 and 2VD2 adopt the contrary mode that connects in succession, and the driving voltage of field effect transistor 2Q1 is disappeared and pushes up and protect, and 2VD3 and 2VD4 are disappeared and push up and protect the driving voltage of field effect transistor 2Q2.The high-frequency alternating current of half-bridge output circuit output is connected with the Non-polarized lamp coil by the resonant network circuit.Wherein output transformer T2 main winding plays the ballast effect, auxiliary winding is feedback end, before Non-polarized lamp starts, auxiliary winding by output transformer T2 arrives drive circuit by signal feedback, the drive circuit frequency-selecting, and the resonance point that finds the resonant network circuit to export, produce high pressure at the Non-polarized lamp two ends, light Non-polarized lamp.After Non-polarized lamp is lighted, the driving voltage of the selected operating frequency of drive circuit output.Electric capacity 2C3 is variable partition, by changing the capacitance of this high-voltage capacitance, can make the ballast can the different output distance of self adaptation, can easily successfully light Non-polarized lamp.Electric capacity 2C5 is afterflow electric capacity.The core that drive circuit is electronic ballast for electrodeless lamp, high-frequency alternating current through the auxiliary winding of output transformer T2 feedback, can be by inductance 2L1, the electronic devices and components such as electric capacity 2C, 2C2 in the frequency automatic circuit, these 3 electronic devices and components are selected feedback frequency, and according to the variation of loading condition, the Non-polarized lamp driving frequency is finely tuned, by the frequency stabilization of the secondary coil of EPC high frequency transformer T3 within the specific limits, can not produce larger variation.The output of the secondary coil by transformer T3, driven field effect transistor 2Q1 and 2Q2 respectively.Abnormal state protection circuit has the two-way input; the feed back input of the auxiliary winding of output transformer T2; rectified action by diode VD2, VD3; uprising alternating current frequently is direct current, when the operating state of the work of Non-polarized lamp changes, in the situations such as Non-polarized lamp fragmentation, gas leakage; can produce high electrical breakdown voltage stabilizing didoe VD5; make controllable silicon Q4 action conducting, the grid of field effect transistor 2Q2 is without input current, and Non-polarized lamp quits work.The input of protection sampling end, if the electronic ballast of electrodeless lamp open circuit directly punctures voltage-stabiliser tube VD5, controllable silicon Q4 conducting, defencive function starts, and when electric ballast is worked in guard mode, circuitry enters micro-loss state.
Claims (6)
1. the electronic ballast of low-frequency nonpolar lamp of regulation output frequency automatically, it comprises filter circuit, rectification circuit, circuit of power factor correction, drive circuit and half-bridge output circuit; It is characterized in that, it also comprises power supply input protection circuit and abnormity protection circuit, and drive circuit also comprises the frequency automatic circuit, and the half-bridge output circuit also comprises the resonant network circuit; Connect the power supply input protection circuit on AC power, its output is connected to the input of drive circuit and half-bridge output circuit after by filter circuit, rectification circuit and circuit of power factor correction, the output of drive circuit connects another input of half-bridge output circuit, and the half-bridge output circuit connects Non-polarized lamp by its resonant network circuit; Feedback end one tunnel of resonant network circuit connects the signal feedback input of the frequency automatic circuit in drive circuit; another road connects the feedback signal input of abnormity protection circuit, and the signal output part of abnormity protection circuit connects the signal input part of drive circuit.
2. the electronic ballast of low-frequency nonpolar lamp of regulation output frequency automatically according to claim 1, it is characterized in that, described drive circuit comprises frequency automatic circuit, transformer T3, resistance 2R1,2R2,2R3,2R4,2R9,2R10, diode 2D1 and 2D2; The frequency automatic circuit is comprised of resistance 2R5,2R6,2R7,2R8, electric capacity 2C1,2C2 and inductance 2L1; The half-bridge output circuit comprises field effect transistor 2Q1,2Q2, voltage stabilizing didoe 2VD1,2VD2,2VD3,2VD4, inductance 2L2 and resonant network circuit; The resonant network circuit comprises transformer T2, electric capacity 2C5 and 2C3; The auxiliary winding one end ground connection of transformer T2, feedback end one tunnel is connected on electric capacity 2C2, after electric capacity 2C2 connects inductance 2L1, lead up to electric capacity 2C1 ground connection, another road is connected to the F end of the primary coil of transformer T3, the other end ground connection of the primary coil of transformer T3 after by resistance 2R5,2R6,2R7 and 2R8 in parallel; Transformer T3 has two secondary coils, the secondary coil G end of upper end is by being connected to the grid of field effect transistor 2Q1 after a road electric capacity 2C4 after resistance 2R10, another road is by resistance 2R9 with along connecing after diode 2VD1 the output that is connected to circuit of power factor correction, the output of circuit of power factor correction is also by after resistance 2R1,2R2, the electric capacity 2C6 of leading up to is connected to the A point, and another road is by resistance 2R3 and 2R4 ground connection; The drain electrode of the source electrode of field effect transistor 2Q1 and field effect transistor 2Q2 all is connected to the A point, and the secondary coil other end of transformer T3 upper end also is connected to the A point; The secondary coil of transformer T3 lower end and the secondary coil of upper end connect the same head end H end that A orders and connect the grid of field effect transistor 2Q2, other end ground connection by resistance 2R11; The A point is connected to an end of the main winding of transformer T2, ground connection after the other end one tunnel connection electric capacity 2C3 of this main winding, ground connection after the coil 2L2 of another road connection electric capacity 2C5 and Non-polarized lamp.
3. the electronic ballast of low-frequency nonpolar lamp of regulation output frequency automatically according to claim 1 and 2, it is characterized in that, described power supply input protection circuit comprises piezo-resistance YMR, YMR1, YMR2, temperature safety tube F2, F3 and gas discharge tube GAS; The L live wire is connected to the B point after by temperature safety tube F2, and the N zero line is connected to the C point after by temperature safety tube F3; Be connected with piezo-resistance YMR between B point and C point, be connected to the end of gas discharge tube GAS after B point connection piezo-resistance YMR1, be connected to the end of gas discharge tube GAS after C point connection piezo-resistance YMR2, the other end ground connection of gas discharge tube GAS.
4. the electronic ballast of low-frequency nonpolar lamp of regulation output frequency automatically according to claim 3, it is characterized in that, described abnormity protection circuit comprises diode 2D2,2D3 2D4, controllable silicon Q4, voltage stabilizing didoe 2VD5, electric capacity 2C7,2C8,2C9,2C10,2C11, resistance 2R12,2R13,2R14,2R15,2R16,2R17,2R18,2R19,2R20 and 2R21; Be connected to the input D point of abnormity protection circuit after resistance 2R12,2R13,2R14 and the 2R15 of the output of circuit of power factor correction by series connection, this input D point also is connected to the feedback end of the auxiliary winding of transformer T2; The secondary coil H end of transformer T3 lower end connects another input E point of abnormity protection circuit by another road after resistance 2R11, the D point is leaded up to ground connection after electric capacity 2C7 in parallel and resistance 2R17 along connecing after diode 2D2, and another road is along connecing after diode 2D3 by resistance 2R18, the contrary control utmost point that is connected to controllable silicon Q4 that connects after voltage stabilizing didoe 2VD5; Tie point between diode 2D3 and resistance 2R18 is by electric capacity 2C8 ground connection, by ground connection after resistance 2R19 in parallel and electric capacity 2C9, pass through ground connection after electric capacity 2C10 and resistance 2R20 on the tie point between the control utmost point of voltage stabilizing didoe 2VD5 and controllable silicon Q4 on tie point between resistance 2R18 and voltage stabilizing didoe 2VD5; The E point is along connecing the anode that diode 2D4Hou mono-tunnel is connected to controllable silicon Q4, another road by resistance 2R21 and electric capacity 2C11 after ground connection, the minus earth of controllable silicon Q4.
5. the electronic ballast of low-frequency nonpolar lamp of regulation output frequency automatically according to claim 1 and 2, it is characterized in that, described abnormity protection circuit comprises diode 2D2,2D3 2D4, controllable silicon Q4, voltage stabilizing didoe 2VD5, electric capacity 2C7,2C8,2C9,2C10,2C11, resistance 2R12,2R13,2R14,2R15,2R16,2R17,2R18,2R19,2R20 and 2R21; Be connected to the input D point of abnormity protection circuit after resistance 2R12,2R13,2R14 and the 2R15 of the output of circuit of power factor correction by series connection, this input D point also is connected to the feedback end of the auxiliary winding of transformer T2; The secondary coil H end of transformer T3 lower end connects another input E point of abnormity protection circuit by another road after resistance 2R11, the D point is leaded up to ground connection after electric capacity 2C7 in parallel and resistance 2R17 along connecing after diode 2D2, and another road is along connecing after diode 2D3 by resistance 2R18, the contrary control utmost point that is connected to controllable silicon Q4 that connects after voltage stabilizing didoe 2VD5; Tie point between diode 2D3 and resistance 2R18 is by electric capacity 2C8 ground connection, by ground connection after resistance 2R19 in parallel and electric capacity 2C9, pass through ground connection after electric capacity 2C10 and resistance 2R20 on the tie point between the control utmost point of voltage stabilizing didoe 2VD5 and controllable silicon Q4 on tie point between resistance 2R18 and voltage stabilizing didoe 2VD5; The E point is along connecing the anode that diode 2D4Hou mono-tunnel is connected to controllable silicon Q4, another road by resistance 2R21 and electric capacity 2C11 after ground connection, the minus earth of controllable silicon Q4.
6. the electronic ballast of low-frequency nonpolar lamp of regulation output frequency automatically according to claim 3, is characterized in that, the output of described circuit of power factor correction is by thermistor 1TR output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202715122U CN203327349U (en) | 2013-05-19 | 2013-05-19 | Low frequency electrodeless lamp electronic ballast capable of automatically adjusting output frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202715122U CN203327349U (en) | 2013-05-19 | 2013-05-19 | Low frequency electrodeless lamp electronic ballast capable of automatically adjusting output frequency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203327349U true CN203327349U (en) | 2013-12-04 |
Family
ID=49666638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202715122U Expired - Fee Related CN203327349U (en) | 2013-05-19 | 2013-05-19 | Low frequency electrodeless lamp electronic ballast capable of automatically adjusting output frequency |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203327349U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106374759A (en) * | 2016-10-19 | 2017-02-01 | 成都尚智恒达科技有限公司 | Multiplexed output power supply with protection function |
| CN106455199A (en) * | 2016-09-18 | 2017-02-22 | 成都聚商节能科技有限公司 | Heat radiation protection for LED driving power supply |
| CN109683641A (en) * | 2018-12-21 | 2019-04-26 | 北京无线电计量测试研究所 | A kind of Non-polarized lamp temprature control method and device |
-
2013
- 2013-05-19 CN CN2013202715122U patent/CN203327349U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106455199A (en) * | 2016-09-18 | 2017-02-22 | 成都聚商节能科技有限公司 | Heat radiation protection for LED driving power supply |
| CN106374759A (en) * | 2016-10-19 | 2017-02-01 | 成都尚智恒达科技有限公司 | Multiplexed output power supply with protection function |
| CN109683641A (en) * | 2018-12-21 | 2019-04-26 | 北京无线电计量测试研究所 | A kind of Non-polarized lamp temprature control method and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101447737B (en) | Constant power output direct current transforming circuit | |
| CN203327349U (en) | Low frequency electrodeless lamp electronic ballast capable of automatically adjusting output frequency | |
| CN101980587A (en) | Electronic ballast for cold cathode fluorescent lamp and output current adjusting method thereof | |
| CN201735934U (en) | Welding machine with low no-load output voltage | |
| CN107734778B (en) | LED driving power circuit and light emitting device | |
| CN202335026U (en) | LED (light-emitting diode) drive circuit and LED drive chip | |
| CN104918360B (en) | A kind of comprehensive protection circuit of LED power | |
| CN201332531Y (en) | DC (direct current) converting circuit | |
| CN201393337Y (en) | Electrodeless lamp ballast circuit with intelligent control interface | |
| CN207427521U (en) | A kind of LED illumination replaces light source | |
| CN201789672U (en) | Electronic ballast | |
| CN201878402U (en) | Electronic ballast for cold-cathode fluorescent lamp | |
| CN101917812A (en) | Metal halide lamp power supply and method for lighting metal halide lamp | |
| CN202841669U (en) | Novel electrodeless lamp ballast circuit | |
| CN204350389U (en) | A kind of LED drive power circuit | |
| CN1674757B (en) | Electromagnetic inductive lamp circuit | |
| CN205961507U (en) | RCC LED drive circuit that adjusts luminance | |
| CN205213132U (en) | Wide voltage electrodeless lamp ballast circuit of intelligence | |
| CN102695347A (en) | Power supply circuit for electronic ballast control chip | |
| CN202738239U (en) | Electronic ballast for metal halide lamp | |
| CN104582185A (en) | LED driving power supply circuit | |
| CN100395953C (en) | Ultramicro power consumption stand by switch circuit | |
| CN204350361U (en) | A kind of safety is exempted to tear LED lamp tube open | |
| CN2485914Y (en) | Electronic A.C. ballast for intensive gas discharge lamp | |
| CN201323694Y (en) | Energy-saving electronic ballast |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131204 Termination date: 20150519 |
|
| EXPY | Termination of patent right or utility model |