CN201248184Y - Ballast circuit - Google Patents
Ballast circuit Download PDFInfo
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- CN201248184Y CN201248184Y CNU2008201633637U CN200820163363U CN201248184Y CN 201248184 Y CN201248184 Y CN 201248184Y CN U2008201633637 U CNU2008201633637 U CN U2008201633637U CN 200820163363 U CN200820163363 U CN 200820163363U CN 201248184 Y CN201248184 Y CN 201248184Y
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
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Abstract
The utility model relates to a ballast circuit aiming at overcoming the defects that the prior circuit has complicated structure and high cost. The ballast circuit comprises an AC-DC conversion module and a DC-AC conversion module, wherein the AC-DC conversion module comprises a bridge rectifier VD1, a varistor VR1, a filtering inductor L1, a filtering capacitor C5 and a filtering capacitor C6, and the DC-AC conversion module comprises a bipolar power transistor VT1, a bipolar power transistor VT2, a starting charging resistor R1, a staring capacitor C1, a discharge diode VD2, a bilateral diode VD3, a high-frequency capacitor C4, an emitter resistor R4, an emitter resistor R5, a bypass resistor R6, a primary coil T1a, a secondary coil T1b and/or a secondary coil T1c; the primary coil T1a is connected with a ballasting inductor L4; one end of a starter S is connected with the tap of the ballasting inductor L4, and the other end is connected with the filtering capacitor C5 and the filtering capacitor C6. The utility model adopts a bipolar transistor half-bridge inversion circuit, has mature and reliable components and parts, low cost and rich sources.
Description
Technical field
The utility model belongs to the control technology field, relates to a kind of circuit, is specifically related to a kind of ballast circuit of improved high-intensity discharge lamp.
Background technology
High-intensity discharge lamp has dynatron effect, and discharge resistance raises with voltage and sharply descends, and must add current-limiting apparatus during work.Typical method adopts the series inductance ballast, and lamp tube ends startup-firing circuit in parallel is realized stably working and starting.Inductive ballast has reliable and stable advantage, but volume is big.Electric ballast adopts higher frequency of oscillation that discharge lamp is powered, and inductive impedance raises with operating frequency and improves, so available small inductor replaces original very big inductor, the overall volume of having dwindled ballast under upper frequency.The starting resistor height of high-intensity discharge lamp must add startup-firing circuit, provides transient high voltages to puncture the gas in the fluorescent tube, enters lasting conduction state after the gas breakdown.Classical fluorescent lamp starter (department beats and takes off) adopts short circuit ballast output end heat filament, and moment opens circuit after the time-delay, cuts off the ballast electric current, causes the ballast coil self-induction to produce high voltage.The leakage transformer that traditional igniter for automobile adopts can produce the above high pressure of 10000V.Can form starter according to different operation principles, finish the igniting task as long as can produce the starting voltage that surpasses fluorescent tube, and the discharging current that can allow circuit keep continuing get final product.
High-intensity discharge lamp has specific questions such as acoustic resonance, can't adopt general electricity-saving lamp ballasting circuit.Ballast circuit for high-intensity discharging lamp is than energy-saving lamp circuit complexity, generally adopts application-specific integrated circuit (ASIC) abroad, adopts the ballast of full-bridge MOS power device more, and is with high costs accordingly.Present high-intensity discharge lamp, as the electric ballast of headlight for vehicles with xenon lamp, additional igniter produces 25000V and triggers high pressure, but the hot gases at high pressure of instantaneous breakdown, but also lamp tube service life has been caused influence; The ignition voltage height, very strict to the line insulation requirement, brought difficulty for installation and use.
Summary of the invention
The purpose of this utility model is exactly at the deficiencies in the prior art, and a kind of low-cost circuit of electronic ballast of high-intensity discharge lamp is provided.
The utility model comprises AC-DC modular converter and DC-AC inverter circuit module.
The AC-DC modular converter comprises bridge rectifier VD1, piezo-resistance VR1, filter inductance L1, the first filter capacitor C5, the second filter capacitor C6, fuse F; The input of bridge rectifier VD1 is connected with the end of piezo-resistance VR1 and an end of single phase alternating current power supply, another input of bridge rectifier VD1 is connected with the end of the other end of piezo-resistance VR1 and fuse F, and the other end of fuse F is connected with the other end of single phase alternating current power supply; The output of bridge rectifier VD1 is connected with the end of filter inductance L1, the other end of filter inductance L1 is connected with the end of the first filter capacitor C5, another output of bridge rectifier VD1 is connected with the end of the second filter capacitor C6, and the other end of the second filter capacitor C6 is connected with the other end of the first filter capacitor C5.Convert AC power to DC power supply by the AC-DC modular converter.
DC-AC inverter circuit module comprises the first power bipolar transistor VT1, the second power bipolar transistor VT2, starts charging resistor R1, starts capacitor C 1, discharge diode VD2, bidirectional diode VD3, high frequency capacitance C4, the first emitter resistance R4, the second emitter resistance R5, bypass resistance R6, primary coil T1a, the first secondary coil T1b and the second secondary coil T1c anti-phase with the first secondary coil T1b; One end of the first frequency-selecting capacitor C 2 is connected with the end that a Q value is regulated resistance R 2, the other end that the one Q value is regulated resistance R 2 is connected with an end of the first frequency-selecting inductance L 2, the other end of the first frequency-selecting inductance L 2 is connected with the base stage of the first power bipolar transistor VT1, the emitter of the first power bipolar transistor VT1 is connected with the end of the first emitter resistance R4, one end of the second frequency-selecting capacitor C 3 is connected with the end that the 2nd Q value is regulated resistance R 3, the other end that the 2nd Q value is regulated resistance R 3 is connected with an end of the second frequency-selecting inductance L 3, the other end of the second frequency-selecting inductance L 3 is connected with the base stage of the second power bipolar transistor VT2 and the end of bidirectional diode VD3, and the emitter of the second power bipolar transistor VT2 is connected with the end of the second emitter resistance R5; The other end of the first emitter resistance R4 is connected with the end of primary coil T1a, the end of the first secondary coil T1b, the end of bypass resistance R6, the end of high frequency capacitance C4, the negative pole of discharge diode VD2, the collector electrode of the second power bipolar transistor VT2, and the other end of the first secondary coil T1b is connected with the other end of the first frequency-selecting capacitor C 2; The other end of the second frequency-selecting capacitor C 3 is connected with the end of the second secondary coil T1c, the end of the second emitter resistance R5 is connected with the emitter of the second power bipolar transistor VT2, and an end of startup capacitor C 1, the other end of the second secondary coil T1c are connected with another output of bridge rectifier VD1 and the end of the second filter capacitor C6 with the second emitter resistance R5 other end; Starting the other end of capacitor C 1 is connected with the other end of bidirectional diode VD3, the anodal and end that starts charging resistor R1 of discharge diode VD2; The other end of startup charging resistor R1, the other end of high frequency capacitance C4, the other end of bypass resistance R6, the collector electrode of the first power bipolar transistor VT1 are connected with the other end of filter inductance L1 and the end of the first filter capacitor C5.
The other end of primary coil T1a is connected with the end of ballast inductance L4, the other end is connected with a utmost point of high-intensity discharge lamp, the end of starter S is connected with the tap of ballast inductance L4, and the other end of starter S is connected with the other end and the other end of the second filter capacitor C6 and another utmost point of high-intensity discharge lamp of the first filter capacitor C5.
Circuit of electronic ballast of the present utility model is connected with outside high-intensity discharge lamp by inner ballast inductance, with the stationary arc discharging current, the high pressure output-parallel of startup-igniter starts required igniting high pressure at the electrode two ends of high-intensity discharge lamp for the cold conditions high-intensity discharge lamp provides.The utility model adopts two preselected frequencies of oscillation of RLC frequency-selective network, avoids the acoustic resonance of external high-intensity gas discharge lamp.The utility model adopts the bipolar transistor half-bridge inversion circuit, the components and parts mature and reliable, with low cost, the source is abundant.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
As shown in Figure 1, this ballast circuit for high-intensity discharging lamp comprises AC-DC modular converter and DC-AC inverter circuit module.
The AC-DC modular converter comprises bridge rectifier VD1, piezo-resistance VR1, filter inductance L1, the first filter capacitor C5, the second filter capacitor C6, fuse F; The input of bridge rectifier VD1 is connected with the end of piezo-resistance VR1 and an end of single phase alternating current power supply, another input of bridge rectifier VD1 is connected with the end of the other end of piezo-resistance VR1 and fuse F, and the other end of fuse F is connected with the other end of single phase alternating current power supply; The output of bridge rectifier VD1 is connected with the end of filter inductance L1, the other end of filter inductance L1 is connected with the end of the first filter capacitor C5, another output of bridge rectifier VD1 is connected with the end of the second filter capacitor C6, and the other end of the second filter capacitor C6 is connected with the other end of the first filter capacitor C5.The electric current of introducing from AC power is at first by being connected on the fuse F of input, the piezo-resistance VR1 that goes up in parallel then.After removing the high voltage spike of electrical network after filtration, output to the input of bridge rectifier VD1, the pulsating direct current after the rectification is by the other two ends output of bridge rectifier.Power filter inductance L 1 is connected on VD1 output and first, second power filtering capacitor C5 and C6 tandem compound and becomes between the total equivalent source filter capacitor, forms the filter circuit of falling L, has constituted the AC-DC module of ballast.Power filter inductance L 1 is not only level and smooth bridge rectifier output ripple electric current has also stoped the pollution to electrical network of high order harmonic component that the rear end inverter circuit produces.C5, C6 series connection is equivalent to a total capacitance, and it is connected in parallel on the two ends of the DC power supply output of L1, and wherein the serial connection point of C5, C6 is as the mid point output of DC power supply.
DC-AC inverter circuit module comprises the first power bipolar transistor VT1, the second power bipolar transistor VT2, starts charging resistor R1, starts capacitor C 1, discharge diode VD2, bidirectional diode VD3, high frequency capacitance C4, the first emitter resistance R4, the second emitter resistance R5, bypass resistance R6, primary coil T1a, the first secondary coil T1b and the second secondary coil T1c anti-phase with the first secondary coil T1b; One end of the first frequency-selecting capacitor C 2 is connected with the end that a Q value is regulated resistance R 2, the other end that the one Q value is regulated resistance R 2 is connected with an end of the first frequency-selecting inductance L 2, the other end of the first frequency-selecting inductance L 2 is connected with the base stage of the first power bipolar transistor VT1, the emitter of the first power bipolar transistor VT1 is connected with the end of the first emitter resistance R4, one end of the second frequency-selecting capacitor C 3 is connected with the end that the 2nd Q value is regulated resistance R 3, the other end that the 2nd Q value is regulated resistance R 3 is connected with an end of the second frequency-selecting inductance L 3, the other end of the second frequency-selecting inductance L 3 is connected with the base stage of the second power bipolar transistor VT2 and the end of bidirectional diode VD3, and the emitter of the second power bipolar transistor VT2 is connected with the end of the second emitter resistance R5; The other end of the first emitter resistance R4 is connected with the end of primary coil T1a, the end of the first secondary coil T1b, the end of bypass resistance R6, the end of high frequency capacitance C4, the negative pole of discharge diode VD2, the collector electrode of the second power bipolar transistor VT2, and the other end of the first secondary coil T1b is connected with the other end of the first frequency-selecting capacitor C 2; The other end of the second frequency-selecting capacitor C 3 is connected with the end of the second secondary coil T1c, the end of the second emitter resistance R5 is connected with the emitter of the second power bipolar transistor VT2, and an end of startup capacitor C 1, the other end of the second secondary coil T1c are connected with another output of bridge rectifier VD1 and the end of the second filter capacitor C6 with the second emitter resistance R5 other end; Starting the other end of capacitor C 1 is connected with the other end of bidirectional diode VD3, the anodal and end that starts charging resistor R1 of discharge diode VD2; The other end of startup charging resistor R1, the other end of high frequency capacitance C4, the other end of bypass resistance R6, the collector electrode of the first power bipolar transistor VT1 are connected with the other end of filter inductance L1 and the end of the first filter capacitor C5.Voltage on startup capacitor C1 surpasses the breakdown threshold of bidirectional diode VD3, and this manages conducting, and the base stage of electric current injecting power transistor VT2 also causes this transistor turns, discharges the electric charge that starts on the capacitor C 1 to VT2 by discharge diode VD2; After finishing initiating task, inverter circuit can be kept vibration automatically.
The other end of primary coil T1a is connected with the end of ballast inductance L4, the other end is connected with a utmost point of high-intensity discharge lamp, the end of starter S is connected with the tap of ballast inductance L4, the other end of the other end of the other end of starter S and the first filter capacitor C5 and the second filter capacitor C6, and another utmost point of high-intensity discharge lamp connects.Starter can adopt the glow starter of contact, perhaps contactless electronic starter.
Claims (1)
1, a kind of ballast circuit comprises AC-DC modular converter and DC-AC inverter circuit module, it is characterized in that:
The AC-DC modular converter comprises bridge rectifier VD1, piezo-resistance VR1, filter inductance L1, the first filter capacitor C5, the second filter capacitor C6, fuse F; The input of bridge rectifier VD1 is connected with the end of piezo-resistance VR1 and an end of single phase alternating current power supply, another input of bridge rectifier VD1 is connected with the end of the other end of piezo-resistance VR1 and fuse F, and the other end of fuse F is connected with the other end of single phase alternating current power supply; The output of bridge rectifier VD1 is connected with the end of filter inductance L1, the other end of filter inductance L1 is connected with the end of the first filter capacitor C5, another output of bridge rectifier VD1 is connected with the end of the second filter capacitor C6, and the other end of the second filter capacitor C6 is connected with the other end of the first filter capacitor C5;
DC-AC inverter circuit module comprises the first power bipolar transistor VT1, the second power bipolar transistor VT2, starts charging resistor R1, starts capacitor C 1, discharge diode VD2, bidirectional diode VD3, high frequency capacitance C4, the first emitter resistance R4, the second emitter resistance R5, bypass resistance R6, primary coil T1a, the first secondary coil T1b and the second secondary coil T1c anti-phase with the first secondary coil T1b; One end of the first frequency-selecting capacitor C 2 is connected with the end that a Q value is regulated resistance R 2, the other end that the one Q value is regulated resistance R 2 is connected with an end of the first frequency-selecting inductance L 2, the other end of the first frequency-selecting inductance L 2 is connected with the base stage of the first power bipolar transistor VT1, the emitter of the first power bipolar transistor VT1 is connected with the end of the first emitter resistance R4, one end of the second frequency-selecting capacitor C 3 is connected with the end that the 2nd Q value is regulated resistance R 3, the other end that the 2nd Q value is regulated resistance R 3 is connected with an end of the second frequency-selecting inductance L 3, the other end of the second frequency-selecting inductance L 3 is connected with the base stage of the second power bipolar transistor VT2 and the end of bidirectional diode VD3, and the emitter of the second power bipolar transistor VT2 is connected with the end of the second emitter resistance R5; The other end of the first emitter resistance R4 is connected with the end of primary coil T1a, the end of the first secondary coil T1b, the end of bypass resistance R6, the end of high frequency capacitance C4, the negative pole of discharge diode VD2, the collector electrode of the second power bipolar transistor VT2, and the other end of the first secondary coil T1b is connected with the other end of the first frequency-selecting capacitor C 2; The other end of the second frequency-selecting capacitor C 3 is connected with the end of the second secondary coil T1c, the end of the second emitter resistance R5 is connected with the emitter of the second power bipolar transistor VT2, and an end of startup capacitor C 1, the other end of the second secondary coil T1c are connected with another output of bridge rectifier VD1 and the end of the second filter capacitor C6 with the second emitter resistance R5 other end; Starting the other end of capacitor C 1 is connected with the other end of bidirectional diode VD3, the anodal and end that starts charging resistor R1 of discharge diode VD2; The other end of startup charging resistor R1, the other end of high frequency capacitance C4, the other end of bypass resistance R6, the collector electrode of the first power bipolar transistor VT1 are connected with the other end of filter inductance L1 and the end of the first filter capacitor C5;
The other end of primary coil T1a is connected with the end of ballast inductance L4, the other end is connected with a utmost point of high-intensity discharge lamp, the end of starter S is connected with the tap of ballast inductance L4, and the other end of starter S is connected with the other end and the other end of the second filter capacitor C6 and another utmost point of high-intensity discharge lamp of the first filter capacitor C5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201633637U CN201248184Y (en) | 2008-08-26 | 2008-08-26 | Ballast circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201633637U CN201248184Y (en) | 2008-08-26 | 2008-08-26 | Ballast circuit |
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|---|---|
| CN201248184Y true CN201248184Y (en) | 2009-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008201633637U Expired - Fee Related CN201248184Y (en) | 2008-08-26 | 2008-08-26 | Ballast circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101351070B (en) * | 2008-08-26 | 2013-04-24 | 杭州电子科技大学 | Ballast circuit for high-intensity discharging lamp |
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- 2008-08-26 CN CNU2008201633637U patent/CN201248184Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101351070B (en) * | 2008-08-26 | 2013-04-24 | 杭州电子科技大学 | Ballast circuit for high-intensity discharging lamp |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090527 Termination date: 20110826 |