CN101917813B - Post-stage drive circuit used for HID electronic ballast - Google Patents
Post-stage drive circuit used for HID electronic ballast Download PDFInfo
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- CN101917813B CN101917813B CN201010104511.XA CN201010104511A CN101917813B CN 101917813 B CN101917813 B CN 101917813B CN 201010104511 A CN201010104511 A CN 201010104511A CN 101917813 B CN101917813 B CN 101917813B
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Abstract
The invention discloses a post-stage drive circuit used for a high intensity discharge (HID) electronic ballast, which can reduce the power consumption of a metal-oxide-semiconductor field effect transistor MOSFET and has high reliability. The drive circuit comprises four MOSFETs, two diodes, two Buck inductors and a capacitor, which are respectively marked as S1, S2, S3, S4, D1, D2, L1, L2 and C, wherein D1 and D2 are positioned outside the MOSFET; S1, L1 and S4 are connected in series; S2, L2 and S3 are connected in series; S1 is connected in parallel with S2 and then connected with a positive electrode or negative electrode of an output end of a pre-stage power supply circuit; S4 is connected with S3 in parallel and then connected with the negative electrode or the positive electrode; L1 and S4 are also connected with D1 in parallel; L2 and S3 are also connected with D2 in parallel; one end of an HID lamp is connected between L1 and S4, while the other end is connected between L2 and S3; the HID lamp is connected with C in parallel; and control ends of S1, S2, S3 and S4 and output ends of S1 and S2 or S3 and S4 are connected with a central control unit.
Description
Technical field
The present invention relates to HID electric ballast technical field, is specifically a kind of post-stage drive circuit for HID electric ballast.
Background technology
HID(High Intensity Discharge) electric ballast is a kind of for driving the electric ballast of HID lamp (high-intensity gas discharge lamp), and traditional HID electric ballast comprises tertiary structure: BOOST boost power factor correction circuit, Buck reduction voltage circuit and DC-AC full bridge inverter.Sort circuit structure is comparatively complicated, and cost is high.In order to simplify described tertiary structure, a kind of HID electric ballast is disclosed in prior art, it is merged into one-level by Buck reduction voltage circuit and DC-AC full bridge inverter, the HID electric ballast after improving becomes two-layer configuration, concrete structure as shown in Figure 1, we are named as the post-stage drive circuit for HID electric ballast by this one-level forming after Buck reduction voltage circuit and the merging of DC-AC full bridge inverter, and prime is referred to as prime power supply circuits.
There is at present a kind of post-stage drive circuit for HID electric ballast, it comprises four MOSFET, be positioned at four diodes of MOSFET body, a Buck inductance, an electric capacity, MOSFET refers to Metal-Oxide-Semicoductor Field-Effect Transistor, it is metal oxide semiconductor field effect tube, for convenience of description, described four MOSFET, four diodes, a Buck inductance, an electric capacity is designated as respectively S1, S2, S3, S4, D11, D12, D13, D14, L, C, concrete structure as shown in Figure 2, as can see from Figure 2, connect with one end of S4 in one end of S1, connect with one end of S3 in one end of S2, the other end of S1 is connected with the positive pole of the output of prime power supply circuits after being connected with the other end of S2 again, the other end of S4 is connected with the negative pole of the output of prime power supply circuits after being connected with the other end of S3 again, the control end of described S1, S2, S3, S4 is respectively used to be connected with the central control unit of HID electric ballast, described S1, S2, each diode in parallel of S3, S4, the conducting direction of diode is from bottom to top, L is connected with the junction of junction, S2 and the S3 of S1 and S4 respectively after being cascaded from left to right with HID lamp, and L and HID lamp are connected between the junction and S2 and the junction of S3 of S1 and S4, HID lamp is also in parallel C.In this circuit, in order to realize, low-frequency square-wave drives and permanent power is controlled, and has several type of drive, conventional a kind of be that S3 and S4 are as the components and parts of commutation and freewheel current using S1 and S2 as Buck main switch components and parts.In this scheme, there are following three defects, one, S3 and S4 oneself power consumption will be larger, affect the steady operation of MOSFET, reduce the reliability of the post-stage drive circuit of HID electric ballast.Equally, also there is such problem in other several type of drive, and two MOSFET, as Buck main switch components and parts, remain two MOSFET as the components and parts of commutation and freewheel current.Two MOSFET oneself power consumptions as commutation and freewheel current will be larger, and caloric value is also large thereupon.Two, described L is no matter be that the positive half cycle of low-frequency square-wave or negative half period are all by running order, and because the square wave of positive half cycle and negative half period switches, can cause the magnetic flux instantaneous variation of L very large, once the control signal sequential of central control unit output has deviation, to make L produce larger induced voltage, when serious, will puncture MOSFET, cause whole circuit collapse.Three, owing to being directly connected with the both positive and negative polarity of the output of prime power supply circuits after S1 and S4, S2 and S3 series connection, once control sequential, there is deviation, be easy to cause S1 and S4 or S2 and S3 conducting simultaneously and cause burning MOSFET and cause whole circuit collapse, therefore, the control signal time sequence precision of central control unit output is had higher requirements.
Summary of the invention
The technical problem to be solved in the present invention is, a kind of power consumption that can reduce MOSFET is provided, has the post-stage drive circuit for HID electric ballast of higher reliability.
Technical scheme of the present invention is, the present invention is for the post-stage drive circuit of HID electric ballast, it comprises MOSFET, diode, Buck inductance, electric capacity, described MOSFET is four, diode and Buck inductance are two, electric capacity is a high-frequency filter capacitor, be designated as respectively a MOSFET S1, the 2nd MOSFET S2, the 3rd MOSFET S3, the 4th MOSFET S4, the first diode D1, the second diode D2, the one Buck inductance L 1, the 2nd Buck inductance L 2, capacitor C, the first diode D1, it is external that the second diode D2 is positioned at MOSFET, i.e. the first diode D1, the second diode D2 independently arranges, one end of a described MOSFET S1, connect with a Buck inductance L 1 in one end of the 4th MOSFET S4, one end of the 2nd MOSFET S2, connect with the second inductance L 2 in one end of the 3rd MOSFET S3, after being connected, the other end of the other end of a described MOSFET S1 and the 2nd MOSFET S2 is connected with the negative or positive electrode of the output of prime power supply circuits, after being connected, the other end of the other end of described the 4th MOSFET S4 and the 3rd MOSFET S3 is connected with negative pole or the positive pole of the output of prime power supply circuits, described the first inductance L 1, in parallel with the first diode D1 after the 4th MOSFET S4 series connection, the positive pole of the first diode D1 is connected with the 4th MOSFET S4, negative pole is connected with a Buck inductance L 1, described the 2nd Buck inductance L 2, in parallel with the second diode D2 after the 3rd MOSFET S3 series connection, the positive pole of the second diode D2 is connected with the 3rd MOSFET S3, negative pole is connected with the 2nd Buck inductance L 2, one end of HID lamp is connected to a Buck inductance L 1, between the 4th MOSFET S4, the other end is connected to the 2nd Buck inductance L 2, between the 3rd MOSFET S3, HID lamp is also in parallel with C, the grid of a described MOSFET S1, the 2nd MOSFET S2, the 3rd MOSFET S3, the 4th MOSFET S4 is connected with the central control unit of HID electric ballast respectively, and the source electrode of a described MOSFET S1, the 2nd MOSFET S2 or the 3rd MOSFET S3, the 4th MOSFET S4 is connected with central control unit.
Operation principle of the present invention is, the one MOSFET S1 and the 2nd MOSFET S2 are as Buck main switch components and parts, the first diode D1 and the second diode D2 are as the components and parts of freewheel current, the 3rd MOSFET S3 and the 4th MOSFET S4 are as the components and parts of commutation and freewheel current, positive half cycle at low-frequency square-wave, the one MOSFET S1 is operated in the high frequency Buck state of low-frequency square-wave modulation, the 3rd MOSFET S3 is operated in low-frequency square-wave state, the one Buck inductance L 1 is worked, the 2nd MOSFET S2, the 2nd Buck inductance L 2 and the 4th MOSFET S4 all do not work, negative half period at low-frequency square-wave, the 2nd MOSFET S2 is operated in the high frequency Buck state of low-frequency square-wave modulation, the 4th MOSFET S4 is operated in low-frequency square-wave state, and the 2nd Buck inductance L 2 is worked, and a MOSFET S1, a Buck inductance L 1 and the 3rd MOSFET S3 all do not work.
The present invention compared with prior art, have the following advantages, one, because the present invention is by a Buck inductance L 1, the 2nd Buck inductance L 2 is connected on respectively between a MOSFET S1 and the 4th MOSFET S4 and the 2nd MOSFET S2 and the 3rd MOSFET S3, in the time of in short-term, conducting can not produce large impact to a MOSFET S1 and the 4th MOSFET S4 or the 2nd MOSFET S2 and the 3rd MOSFET S3, the danger that is conducive to reduce a MOSFET S1 and the 4th MOSFET S4 in prior art or S2 and the 3rd MOSFET S3 conducting simultaneously and burns, improve the reliability of post-stage drive circuit, two, the present invention's the one Buck inductance L 1, the 2nd Buck inductance L 2 half cycle of all only working, curent change value is only half of prior art, and flux change will reduce, and caloric value will reduce, even the induced potential under abnormality is also half as large, be conducive to improve the reliability of post-stage drive circuit.Three, due to the first diode D1, that the second diode D2 is positioned at MOSFET is external, the first diode D1, the second diode D2 independently arrange, so the 3rd MOSFET S3, the 4th MOSFET S4 heating all decline, are conducive to improve the reliability of MOSFET.Four, due to one, the existence of 2 two, central control unit is controlled to time sequence precision and requires to reduce, be conducive to improve the antijamming capability of post-stage drive circuit, strengthened the reliability of post-stage drive circuit, be convenient to debugging and produce.The present invention have advantages of can reduce MOSFET power consumption, have higher reliability.
Accompanying drawing explanation
Fig. 1 is the frame principle figure of prior art HID electric ballast.
Fig. 2 is that prior art is for the circuit theory diagrams of the post-stage drive circuit of HID electric ballast.
Fig. 3 is that the present invention is for the circuit theory diagrams of the embodiment mono-of the post-stage drive circuit of HID electric ballast.
Fig. 4 is that the present invention is for the circuit theory diagrams of the embodiment bis-of the post-stage drive circuit of HID electric ballast.
Fig. 5 is the equivalent circuit theory figure of the post-stage drive circuit for HID electric ballast of the embodiment of the present invention one while being operated in the positive half cycle of low-frequency square-wave.
Fig. 6 is the equivalent circuit theory figure of the post-stage drive circuit for HID electric ballast of the embodiment of the present invention one while being operated in the negative half period of low-frequency square-wave.
Fig. 7 is the equivalent circuit theory figure of the post-stage drive circuit for HID electric ballast of the embodiment of the present invention two while being operated in the positive half cycle of low-frequency square-wave.
Fig. 8 is the equivalent circuit theory figure of the post-stage drive circuit for HID electric ballast of the embodiment of the present invention two while being operated in the negative half period of low-frequency square-wave.
Fig. 9 is that the present invention is for the positive half cycle excitation waveform figure of the post-stage drive circuit of HID electric ballast.
Figure 10 is that the present invention is for the negative half period excitation waveform figure of the post-stage drive circuit of HID electric ballast.
Figure 11 is that the present invention is for the actual measurement lamp current waveform figure of the post-stage drive circuit of HID electric ballast.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Adopt the present invention for the same prior art of frame principle figure of the HID electric ballast of the post-stage drive circuit of HID electric ballast, as shown in Figure 1.
Embodiment mono-,
The present invention is for the post-stage drive circuit of HID electric ballast, it comprises MOSFET, diode, Buck inductance, electric capacity, described MOSFET is four, diode and Buck inductance are two, electric capacity is a high-frequency filter capacitor, be designated as respectively a MOSFET S1, the 2nd MOSFET S2, the 3rd MOSFET S3, the 4th MOSFET S4, the first diode D1, the second diode D2, the one Buck inductance L 1, the 2nd Buck inductance L 2, capacitor C, the first diode D1, it is external that the second diode D2 is positioned at MOSFET, i.e. the first diode D1, the second diode D2 independently arranges, one end of a described MOSFETS1, connect with a Buck inductance L 1 in one end of the 4th MOSFET S4, one end of the 2nd MOSFET S2, connect with the 2nd Buck inductance L 2 in one end of the 3rd MOSFET S3, after being connected, the drain electrode of the drain electrode of a described MOSFETS1 and the 2nd MOSFET S2 is connected with the positive pole of the output of prime power supply circuits, after being connected, the source electrode of the source electrode of described the 4th MOSFET S4 and the 3rd MOSFET S3 is connected with the negative pole of the output of prime power supply circuits, a described Buck inductance L 1, in parallel with the first diode D1 after the 4th MOSFET S4 series connection, the positive pole of the first diode D1 is connected with the 4th MOSFET S4, negative pole is connected with a Buck inductance L 1, described the 2nd Buck inductance L 2, in parallel with the second diode D2 after the 3rd MOSFET S3 series connection, the positive pole of the second diode D2 is connected with the 3rd MOSFET S3, negative pole is connected with the 2nd Buck inductance L 2, one end of HID lamp is connected to a Buck inductance L 1, between the 4th MOSFET S4, the other end is connected to the 2nd Buck inductance L 2, between the 3rd MOSFETS3, HID lamp is also in parallel with capacitor C, the grid of a described MOSFET S1, the 2nd MOSFET S2, the 3rd MOSFET S3, the 4th MOSFET S4 is connected with the central control unit of HID electric ballast respectively, and the source electrode of a described MOSFET S1, the 2nd MOSFET S2 is connected with central control unit.Concrete structure as shown in Figure 3.
In this example, the one MOSFET S1 and the 2nd MOSFET S2 are as Buck main switch components and parts, the first diode D1 and the second diode D2 are as the components and parts of freewheel current, the 3rd MOSFET S3 and the 4th MOSFET S4 are as the components and parts of commutation and freewheel current, positive half cycle at low-frequency square-wave, the control of the central control unit by HID electric ballast, the one MOSFET S1 is operated in the high frequency Buck state of low-frequency square-wave modulation, the 3rd MOSFET S3 is operated in low-frequency square-wave state, the one Buck inductance L 1 is worked, the 2nd MOSFET S2, the 2nd Buck inductance L 2 and the 4th MOSFET S4 all do not work, equivalent circuit theory figure as shown in Figure 5, positive half cycle excitation waveform as shown in Figure 9, negative half period at low-frequency square-wave, the control of the central control unit by HID electric ballast, the 2nd MOSFET S2 is operated in the high frequency Buck state of low-frequency square-wave modulation, the 4th MOSFET S4 is operated in low-frequency square-wave state, the 2nd Buck inductance L 2 is worked, the one MOSFET S1, a Buck inductance L 1 and the 3rd MOSFET S3 all do not work, and as shown in Figure 6, negative half period excitation waveform as shown in figure 10 for equivalent circuit theory figure.The sense of current is as shown in arrow in Fig. 5 or Fig. 6, and actual measurement lamp current waveform as shown in figure 11.
Embodiment bis-,
The present invention is for the post-stage drive circuit of HID electric ballast, it comprises MOSFET, diode, Buck inductance, electric capacity, described MOSFET is four, diode and Buck inductance are two, electric capacity is a high-frequency filter capacitor, be designated as respectively a MOSFET S1, the 2nd MOSFET S2, the 3rd MOSFET S3, the 4th MOSFET S4, the first diode D1, the second diode D2, the one Buck inductance L 1, the 2nd Buck inductance L 2, capacitor C, the first diode D1, it is external that the second diode D2 is positioned at MOSFET, i.e. the first diode D1, the second diode D2 independently arranges, one end of a described MOSFET S1, connect with a Buck inductance L 1 in one end of the 4th MOSFET S4, one end of the 2nd MOSFET S2, connect with the 2nd Buck inductance L 2 in one end of the 3rd MOSFET S3, after being connected, the source electrode of the source electrode of a described MOSFET S1 and the 2nd MOSFET S2 is connected with the negative pole of the output of prime power supply circuits, after being connected, the drain electrode of the drain electrode of described the 4th MOSFET S4 and the 3rd MOSFET S3 is connected with the positive pole of the output of prime power supply circuits, a described Buck inductance L 1, in parallel with the first diode D1 after the 4th MOSFET S4 series connection, described the 2nd Buck inductance L 2, in parallel with the second diode D2 after the 3rd MOSFET S3 series connection, one end of HID lamp is connected to a Buck inductance L 1, between the 4th MOSFET S4, the other end is connected to L2, between the 3rd MOSFET S3, HID lamp is also in parallel with capacitor C, the grid of a described MOSFET S1, the 2nd MOSFET S2, the 3rd MOSFET S3, the 4th MOSFET S4 is connected with the central control unit of HID electric ballast respectively, and the source electrode of described the 3rd MOSFET S3, the 4th MOSFET S4 is connected with central control unit.Concrete structure as shown in Figure 4.
In this example, the one MOSFET S1 and the 2nd MOSFET S2 are as Buck main switch components and parts, the first diode D1 and the second diode D2 are as the components and parts of freewheel current, the 3rd MOSFET S3 and the 4th MOSFET S4 are as the components and parts of commutation and freewheel current, positive half cycle at low-frequency square-wave, the control of the central control unit by HID electric ballast, the one MOSFET S1 is operated in the high frequency Buck state of low-frequency square-wave modulation, the 3rd MOSFET S3 is operated in low-frequency square-wave state, the one Buck inductance L 1 is worked, the 2nd MOSFET S2, the 2nd Buck inductance L 2 and the 4th MOSFET S4 all do not work, equivalent circuit theory figure as shown in Figure 7, positive half cycle excitation waveform as shown in Figure 9, negative half period at low-frequency square-wave, the control of the central control unit by HID electric ballast, the 2nd MOSFET S2 is operated in the high frequency Buck state of low-frequency square-wave modulation, the 4th MOSFET S4 is operated in low-frequency square-wave state, the 2nd Buck inductance L 2 is worked, the one MOSFET S1, a Buck inductance L 1 and the 3rd MOSFET S3 all do not work, and as shown in Figure 8, negative half period excitation waveform as shown in figure 10 for equivalent circuit theory figure.The sense of current is as shown in arrow in Fig. 7 or Fig. 8, and actual measurement lamp current waveform as shown in figure 11.
In embodiment mono-, two, the central control unit of described prime power supply circuits and HID electric ballast is prior art, directly adopts.
Claims (1)
1. the post-stage drive circuit for HID electric ballast, it comprises MOSFET, diode, Buck inductance, electric capacity, it is characterized in that, described MOSFET is four, diode and Buck inductance are two, electric capacity is a high-frequency filter capacitor, be designated as respectively a MOSFET (S1), the 2nd MOSFET (S2), the 3rd MOSFET (S3), the 4th MOSFET (S4), the first diode (D1), the second diode (D2), the one Buck inductance (L1), the 2nd Buck inductance (L2), electric capacity (C), the first diode (D1), it is external that the second diode (D2) is positioned at MOSFET, i.e. the first diode (D1), the second diode (D2) is independent to be arranged, a described MOSFET(S1) one end, the 4th MOSFET(S4) connect with a Buck inductance (L1) in one end, the 2nd MOSFET(S2) one end, the 3rd MOSFET(S3) connect with the 2nd Buck inductance (L2) in one end, a described Buck inductance (L1), the 4th MOSFET(S4) in parallel with the first diode (D1) after series connection, the positive pole of the first diode (D1) and the 4th MOSFET(S4) be connected, negative pole is connected with a Buck inductance (L1), described the 2nd Buck inductance (L2), the 3rd MOSFET(S3) in parallel with the second diode (D2) after series connection, the positive pole of the second diode (D2) is connected with the 3rd MOSFET (S3), negative pole is connected with the 2nd Buck inductance (L2), one end of HID lamp is connected to a Buck inductance (L1), the 4th MOSFET(S4) between, the other end is connected to the 2nd Buck inductance (L2), the 3rd MOSFET(S3) between, HID lamp is also in parallel with electric capacity (C),
A described MOSFET(S1), the 2nd MOSFET(S2), the 3rd MOSFET(S3), the 4th MOSFET(S4) grid be connected with the central control unit of HID electric ballast respectively, a described MOSFET(S1), the 2nd MOSFET(S2) source electrode be connected with central control unit;
A described MOSFET(S1) drain electrode and the 2nd MOSFET(S2) drain electrode is connected with the positive pole of the output of prime power supply circuits after being connected, described the 4th MOSFET(S4) source electrode and the 3rd MOSFET(S3) source electrode be connectedly connected with the negative pole of the output of prime power supply circuits afterwards.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010104511.XA CN101917813B (en) | 2010-02-03 | 2010-02-03 | Post-stage drive circuit used for HID electronic ballast |
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| CN201010104511.XA CN101917813B (en) | 2010-02-03 | 2010-02-03 | Post-stage drive circuit used for HID electronic ballast |
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| CN101917813A CN101917813A (en) | 2010-12-15 |
| CN101917813B true CN101917813B (en) | 2014-04-09 |
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| CN108337795B (en) * | 2018-02-07 | 2024-02-06 | 深圳市朗文科技实业有限公司 | Two-stage low-frequency square wave electronic ballast |
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| US5932976A (en) * | 1997-01-14 | 1999-08-03 | Matsushita Electric Works R&D Laboratory, Inc. | Discharge lamp driving |
| CN2343739Y (en) * | 1998-09-29 | 1999-10-13 | 李卫阳 | Frequency conversion electronic ballast |
| CN1829407A (en) * | 2005-02-28 | 2006-09-06 | Nec液晶技术株式会社 | Cold cathode tube lighting device and driving method and integrated circuit to be used in same |
| CN1906979A (en) * | 2000-11-01 | 2007-01-31 | 皇家菲利浦电子有限公司 | Circuit arrangement |
| CN101527997A (en) * | 2009-04-20 | 2009-09-09 | 中国电子科技集团公司第五十二研究所 | Two-grade full-bridge mode low-frequency square-wave driven HID lamp electronic ballast |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2694703Y (en) * | 2004-03-22 | 2005-04-20 | 浙江大学 | High intensity gas-discharge lamp electronic ballast |
| WO2007138549A1 (en) * | 2006-05-31 | 2007-12-06 | Koninklijke Philips Electronics N.V. | Lamp driving circuit |
| CN101472373A (en) * | 2007-12-26 | 2009-07-01 | 林清华 | Mixing bridge type electric ballast |
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2010
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5932976A (en) * | 1997-01-14 | 1999-08-03 | Matsushita Electric Works R&D Laboratory, Inc. | Discharge lamp driving |
| CN2343739Y (en) * | 1998-09-29 | 1999-10-13 | 李卫阳 | Frequency conversion electronic ballast |
| CN1906979A (en) * | 2000-11-01 | 2007-01-31 | 皇家菲利浦电子有限公司 | Circuit arrangement |
| CN1829407A (en) * | 2005-02-28 | 2006-09-06 | Nec液晶技术株式会社 | Cold cathode tube lighting device and driving method and integrated circuit to be used in same |
| CN101527997A (en) * | 2009-04-20 | 2009-09-09 | 中国电子科技集团公司第五十二研究所 | Two-grade full-bridge mode low-frequency square-wave driven HID lamp electronic ballast |
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