CN2450849Y - Electronic ballast of constant power gas discharge lamp - Google Patents
Electronic ballast of constant power gas discharge lamp Download PDFInfo
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- CN2450849Y CN2450849Y CN 00232309 CN00232309U CN2450849Y CN 2450849 Y CN2450849 Y CN 2450849Y CN 00232309 CN00232309 CN 00232309 CN 00232309 U CN00232309 U CN 00232309U CN 2450849 Y CN2450849 Y CN 2450849Y
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- circuit
- discharge lamp
- power
- high frequency
- oscillation
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Abstract
The utility model relates to an electronic ballast of a constant power gas discharge lamp. The electronic ballast comprises a main gas discharge lamp loop which is connected with the gas discharge lamp, and a damping oscillation starting and current limiting control circuit which is connected with the loop. The electronic ballast is characterized in that the main loop comprises a low-pass filtering rectification circuit, a power factor correction PFC boosted circuit, a high frequency oscillation half-bridge drive circuit, a high frequency DC blocking current-limiting circuit, a high frequency full-bridge rectification circuit, a low frequency oscillation full-bridge drive circuit, a 12V power supply circuit, an output open circuit, a short circuit protection circuit, and a damping oscillation generating high-voltage lamp bulb starting working circuit. The ballast takes low frequency output, and overcomes the acoustic resonance phenomenon.
Description
The utility model belongs to lighting field, particularly a kind of permanent power gas discharge lamp electric ballast.
High-intensity gas discharge lamp (HID) comprises Metal halogen lamp, sodium vapor lamp, mercury lamp etc., compare with incandescent lamp, iodine-tungsten lamp, have characteristics such as energy-conservation, that luminous efficiency is high, spectrum good, the life-span is long, be widely used in the illumination in places such as shop, stadiums, highway, square.At present, abroad some major company has developed the following small-power HID electronic lamp ballast of 150W, but costs an arm and a leg.And existing electronic ballast for gas discharging lamp is operated under 26KHZ to the 50KHZ high frequency mostly, has more serious " acoustic resonance " phenomenon, and the gaseous discharge lamp of different size has different " acoustic resonance " phenomenons, can cause blow-out when serious.The domestic traditional electrical sense ballast that also is to use basically at present.
The purpose of this utility model is a kind of permanent power gas discharge lamp electric ballast of design, adopts the low frequency drive circuit, overcomes " acoustic resonance " of the prior art phenomenon.
Task of the present utility model is achieved in that a kind of permanent power gas discharge lamp electric ballast; comprise the gaseous discharge lamp major loop that is connected with gaseous discharge lamp; and with loop-coupled damped oscillation striking circuit; it is characterized in that described gaseous discharge lamp major loop is successively by the low-pass filtering rectification circuit; circuit of power factor correction PFC booster circuit; high frequency half bridge formula power output circuit; high frequency is every straight current-limiting circuit; the high frequency full bridge rectifier; the low frequency full bridge power output circuit; the damped oscillation self coupling striking circuit that boosts; the output open circuit short-circuit protection circuit; higher-order of oscillation drive circuit is formed by connecting; high frequency provides power supply to provide the low-frequency oscillation drive circuit after the 12V power circuit is handled every straight current-limiting circuit simultaneously; the working power of output open circuit short-circuit protection circuit and higher-order of oscillation drive circuit; this moment, the output of higher-order of oscillation drive circuit fed back to high frequency half bridge formula power output circuit again; simultaneously the low-frequency oscillation drive circuit is then exported a drive signal and is given the low frequency full bridge power output circuit, and the low frequency full bridge power output circuit drives the damped oscillation self coupling striking circuit that boosts and starts bulb work.
The utility model designs a kind of permanent power gas discharge lamp electric ballast, except having solved the acoustic resonance phenomenon, also has following characteristics: the power factor height; Current harmonic content is low; Loss is low, the efficient height; Operating frequency is the 130HZ low-frequency square-wave; Power output is constant, not influenced by light tube electric voltage variation and mains fluctuations; It is low that operational environment requires, but input voltage 150V～265V operate as normal all; Volume is little, and is in light weight, simple in structure, long working life; Radiation and conducted interference (EMI) meet the IEC standard.
Below in conjunction with concrete legend the utility model is described further:
Fig. 1 is the utility model theory diagram.
Fig. 2 is the utility model circuit theory diagrams.
Fig. 3 is a SIP4 modular circuit among Fig. 2.
Fig. 4 is a SIP2 modular circuit among Fig. 2.
Fig. 5 is a SIP5 modular circuit among Fig. 2.
Fig. 6 is a SIP3 modular circuit among Fig. 2.
With reference to Fig. 1 theory diagram of the present utility model and in conjunction with Fig. 2 to Fig. 6, the composition and the operating state of each functional module in the principle frame is described further:
Low-pass filtering rectification circuit: form by inductance L 1, L2, capacitor C 1, C2, C3, C4 and rectifier bridge U1.Higher-order of oscillation drive circuit: form oscillating circuit by U8 and peripheral circuit thereof in the SIP4 module, the concrete course of work is as follows: DC400V is through resistance R 5 step-downs, start U8 work, be controlled at U8 the 11st pin, suitable driving pulse driving power pipe T2, the T3 conducting of 15 pin output by Dead Time, then provide its normal working voltage, start frequency f 0 by resistance R among Fig. 2 30, R26, capacitor C 25 decisions by the 12V power supply.The source resistance R6 of power tube T3 is as the detection resources electrode current, and is that voltage passes through through R25 with current conversion, and U8 the 6th pin is delivered to the amplifier inverting input.Amplifier the 5th pin is connected to the 4th pin by diode D13, resistance R 28, along with resistance R 6 two ends average voltages increase, lamp is realized closed-loop control to electric current during normal ignition, regulate resistance R 26 and can adjust power, thereby control bulb output constant power, and realize dimming function.
High frequency is every straight current-limiting circuit: be made up of capacitor C 11, inductance L 4, owing to adopt the PFM modulation system, 4 bidirectionally employings of inductance L can reduce volume.
High frequency full bridge rectifier: form by diode D2, D3, D4 and D5.
Power factor correction PFC booster circuit: form the interrupted booster type circuit of inductive current by power tube T1, inductance L 3, diode D1, capacitor C 7, SIP2 module etc., at capacitor C 7 two ends output direct current 400V voltage.
The low oscillation drive circuit that shakes: form by U13, U14, U15 and peripheral cell thereof, output phase drives square wave on the contrary, driving power pipe T4, T7, T5, T6 one after the other conducting, the output of formation full-bridge inverting, the startup frequency of circuit is 500HZ, and the damped oscillation self coupling booster circuit of capacitor C 14, inductance L 5 compositions produces about 3KV high voltage startup bulb operate as normal at this moment.After the normal startup of circuit, utilize amplifier LM358, power tube T8 to change U14 the 3rd pin ground capacity appearance value realization startup frequency and from about 500HZ, reduce to 130HZ operating frequency process, make bulb work in the 130HZ square wave.
12V DC power supply circuit: form by capacitor C 40, inductance L 7, diode D26, D28, voltage-stabiliser tube D27, D29 etc.Utilize the C40 high frequency every directly, inductance L 7 step-downs, diode D26, D28 rectification, output 12V power supply is supplied with the IC operate as normal and is used after voltage-stabiliser tube D27, the D29 voltage stabilizing, is characterized in guaranteeing long-time low power operation under the no-load condition.
Output short circuit protection circuit: form by U7, U9 and peripheral cell thereof.In order to guarantee that electric ballast is under abnormal conditions, can work reliably and with long-term, introduce open circuit, short-circuit protection function, realize lamp open circuit, short-circuit protection function by U8 the 8th pin current potential in the control higher-order of oscillation drive circuit, in case short circuit appears in lamp, U9 the 14th pin output high level forces the U8 failure of oscillation; In case lamp output open circuit, U9 the 8th pin output low level, U7 picks up counting, after 8 minutes, U7 the 3rd pin output high level to U8 the 8th pin forces the U8 failure of oscillation, and switch-off power pipe T2, T3 output, guarantees under lamp open circuit, short-circuit conditions, power switch pipe is not worked, thereby avoids the electric ballast heating to damage.
The trend of work of the utility model electric ballast is described in detail in detail below:
When electronic ballast for high-strength gas discharge lamp is in running order, electric current is via inductance L 1, L2, capacitor C 1, C2, C3, C4, low-pass filtering rectification circuit 1 back (Fig. 2) that rectifier bridge U2 forms, ingoing power factor correcting PFC booster circuit 2, power factor correction pfc circuit module SIP2 (Fig. 4) and peripheral cell power tube T1 thereof, inductance L 3, diode D1, electrochemical capacitor C7 etc. form the interrupted booster type circuit of inductive current, power factor correction pfc circuit module SIP2 is by detecting input, the waveform of output current, and by continuous conducting between power controlling pipe T1, reach and increase angle of flow effect, and suppress harmonic wave to greatest extent, thereby at the stable DC400V of C7 two ends output.
After DC400V entered the higher-order of oscillation drive circuit of being made up of SIP4 module (Fig. 3) and peripheral circuit thereof 8, the one tunnel through resistance R 5 step-downs, started U8 work, started frequency f 0 by resistance R among Fig. 3 30, R26, capacitor C 25 decisions.Be controlled at U8 the 11st pin, suitable driving pulse driving T2, the T3 conducting (being high frequency half bridge formula power output circuit 3) of 15 pin output by Dead Time, produce higher-order of oscillation output; The high frequency that higher-order of oscillation waveform is formed via capacitor C 11, inductance L 4 is behind the high frequency full bridge rectifier 5 that straight current-limiting circuit 4 and D2, D3, D4, D5 form, for low frequency full bridge power output circuit 6 provides dc power supply; Provide power supply for 12V power circuit 11 simultaneously; herein electric current through capacitor C 40 high frequencies every directly; transformer L7 transformation; diode D26, D28 rectification; output 12V power supply supply high frequency oscillation drive circuit 8, low oscillation drive circuit 9 and output open circuit, short-circuit protection circuit 10 operate as normal are used after voltage-stabiliser tube D27, the D29 voltage stabilizing, guarantee that no-load condition down can long-time low power operation.
The low-frequency oscillation drive circuit 9 that this moment, U14, U15 and peripheral cell thereof were formed is started working, output phase drives square wave on the contrary, driving power pipe T4, T7, T5, T6 one after the other conducting (low frequency full bridge power output circuit 6), export the interchange that a frequency is 500HZ, behind the damped oscillation self coupling booster circuit 7 that capacitor C 14, inductance L 5 are formed, produce about 3KV high voltage startup bulb work at bulb side.After the normal startup of circuit, utilize amplifier LM358, triode T8 to change the 3 pin ground capacity appearance values of U14, thereby change the output frequency of low frequency full bridge power output circuit 6, for bulb provides 130HZ square wave running current.
After the lamp normal ignition, the source resistance R6 of power tube T3 is as the detection resources electrode current, and be that voltage resistance R 25 in the SIP4 module is delivered to the amplifier inverting input by U8 the 6th pin with current conversion, amplifier the 5th pin is connected to the 4th pin by diode D13, resistance R 28, along with resistance R 6 two ends average voltages increase, can realize closed-loop control to electric current; Regulate resistance R 26 and can adjust power, thus control bulb output constant power, and realize dimming function.
Introducing lamp open circuit, short-circuit protection function under abnormal conditions, can work reliably and with long-term in order to guarantee electric ballast, in the SIP4 module, realize lamp open circuit, short-circuit protection function by control U8 the 8th pin current potential, in case short circuit appears in lamp, U9 the 14th pin output high level forces the U8 failure of oscillation; In case lamp output open circuit, U9 the 8th pin output low level, U7 picks up counting, after 8 minutes, U7 the 3rd pin output high level to U8 the 8th pin forces the U8 failure of oscillation, and switch-off power pipe T2, T3 output, guarantees under open circuit or short-circuit conditions, power switch pipe is not worked, thereby avoids the electric ballast heating to damage.
Claims (1)
1; a kind of permanent power gas discharge lamp electric ballast; comprise the gaseous discharge lamp major loop that is connected with gaseous discharge lamp; and form with loop-coupled damped oscillation build-up of luminance; it is characterized in that described gaseous discharge lamp major loop is successively by the low-pass filtering rectification circuit; circuit of power factor correction PFC booster circuit; high frequency half bridge formula power output circuit; high frequency is every straight current-limiting circuit; the high frequency full bridge rectifier; the low frequency full bridge power output circuit; the damped oscillation self coupling striking circuit that boosts; the output open circuit short-circuit protection circuit; higher-order of oscillation drive circuit is formed by connecting; high frequency provides power supply to provide the low-frequency oscillation drive circuit after the 12V power circuit is handled every straight current-limiting circuit simultaneously; the working power of output open circuit short-circuit protection circuit and higher-order of oscillation drive circuit; this moment, the output of higher-order of oscillation drive circuit fed back to high frequency half bridge formula power output circuit again; simultaneously the low-frequency oscillation drive circuit is then exported a drive signal and is given the low frequency full bridge power output circuit, and the low frequency full bridge power output circuit drives the damped oscillation self coupling striking circuit that boosts and starts bulb work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00232309 CN2450849Y (en) | 2000-10-31 | 2000-10-31 | Electronic ballast of constant power gas discharge lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00232309 CN2450849Y (en) | 2000-10-31 | 2000-10-31 | Electronic ballast of constant power gas discharge lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2450849Y true CN2450849Y (en) | 2001-09-26 |
Family
ID=33594983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00232309 Expired - Lifetime CN2450849Y (en) | 2000-10-31 | 2000-10-31 | Electronic ballast of constant power gas discharge lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2450849Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100473252C (en) * | 2001-11-02 | 2009-03-25 | 贝格利股份公司 | High energy-saving electronic regulating control equipment |
| WO2012007953A1 (en) * | 2010-07-13 | 2012-01-19 | Kamalabai Russel Rajeev | Electronic ballast for self ballasted lamps and other gas discharged lamps with or without filaments |
-
2000
- 2000-10-31 CN CN 00232309 patent/CN2450849Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100473252C (en) * | 2001-11-02 | 2009-03-25 | 贝格利股份公司 | High energy-saving electronic regulating control equipment |
| WO2012007953A1 (en) * | 2010-07-13 | 2012-01-19 | Kamalabai Russel Rajeev | Electronic ballast for self ballasted lamps and other gas discharged lamps with or without filaments |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20101031 Granted publication date: 20010926 |