CN1003828B - High-pressure sodium discharge lamp - Google Patents
High-pressure sodium discharge lamp Download PDFInfo
- Publication number
- CN1003828B CN1003828B CN85101656.1A CN85101656A CN1003828B CN 1003828 B CN1003828 B CN 1003828B CN 85101656 A CN85101656 A CN 85101656A CN 1003828 B CN1003828 B CN 1003828B
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- Prior art keywords
- circuit
- lamp
- thyristor
- main
- voltage
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- 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.)
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- 239000011734 sodium Substances 0.000 title abstract description 8
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 title abstract description 4
- 229910052708 sodium Inorganic materials 0.000 title abstract description 4
- 239000003990 capacitor Substances 0.000 claims abstract description 27
- 238000007599 discharging Methods 0.000 claims description 22
- 230000002457 bidirectional effect Effects 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000010304 firing Methods 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 abstract description 3
- 239000007858 starting material Substances 0.000 abstract 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229920002994 synthetic fiber Polymers 0.000 description 3
- 230000004907 flux Effects 0.000 description 2
- 238000007537 lampworking Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 229910052724 xenon Inorganic materials 0.000 description 2
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 2
- 206010011906 Death Diseases 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000000266 injurious effect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- MJGFBOZCAJSGQW-UHFFFAOYSA-N mercury sodium Chemical compound [Na].[Hg] MJGFBOZCAJSGQW-UHFFFAOYSA-N 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 230000004224 protection Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
A high-pressure sodium discharge lamp is composed of a discharge vessel provided with external additional electrodes, which lamp is additionally provided with a starting circuit comprising an electric circuit composed of a transformer coil, a capacitor and a semiconductor switching element. This circuit is connected in series with a resistor and then in parallel with the discharge vessel. The transformer is connected to the external additional electrode. According to the invention, the semiconductor switching element is a thyristor-type, uncontrollable, pressure-sensitive switching element which, for a switching time of less than 10 microseconds, has a switching current of less than 1 milliampere, so that a lamp which is very reliable in starting and in which a starter is accommodated which consumes a small power train is obtained.
Description
The present invention relates to a kind of high-pressure Na discharge lamp, it is made up of a discharging shell of being furnished with two main electrodes, stable discharging between lower two main electrodes in working order, in addition this discharging shell is furnished with an electrode that outside is additional, this lamp is furnished with a starting circuit in addition, this starting circuit comprises that one by transformer, the circuit of a main capacitor and a thyristor composition, and the series connection of main resistor is then connected in parallel between two main electrodes and this circuit is connected by the secondary coil of the transformer electrode additional with outside for this circuit.
This lamp of mentioning at the preceding paragraph, with Netherlands patent applications book 8006802(PHN.9919) in known.This lamp carrys out work with alternating voltage conventionally.In known lamp, thyristor is the controllable semiconductor element of a bidirectional thyristor formula, selected known like this structure, and result is to trigger this thyristor at the switching current of 2 milliamperes that during starts at least will provide of electric light.Therefore, this also causes under the condition of work of electric light, and a larger electric current flows through the starting circuit in parallel with lamp current, this with regard to injurious effects the efficiency of electric light.In addition, in the situation that electric light does not start immediately, this will cause a larger electric current of the long-time transmission of starting circuit, and result produces a sizable heat.In actual conditions, have been found that produced heat is so large, so that exceed maximum permissible value in the surface temperature of main capacitor and/or thyristor, this will cause main electrical equipment and/or thyristor to degenerate and therefore cause the too early end-of-life of electric light.
The object of this invention is to provide a kind of device, the unfavorable factor described in can avoiding with this device.For this object, according to the present invention, starting that lamp mentioned of section, it is characterized in that thyristor is a kind of uncontrollable pressure-sensitive opening component of unidirectional or bidirectional thyristor formula, in the time that the opening time is less than 10 microsecond, its firing current is less than 1 milliampere.Firing current is little its superiority, on the one hand and the circuit resistance of connecting can be very large, in circuit, a less main capacitor is just enough on the other hand.In starting circuit, the larger resistance of resistance can ensure only to have very little electric current to flow through circuit under condition of work, and this has good effect to the efficiency that improves electric light.A less main capacitor has additional advantage, namely the voltage at the two ends of this capacitor only lags behind applied voltage slightly, and result produces in the time that applied voltage is large, thereby on the additional electrode in outside, produce start pulse, this is favourable to rapid starting electric light.
" pressure-sensitive opening component " can be understood as is in this manual so a kind of element, and in the time that this added voltage in element two ends exceedes the critical voltage of itself, it is opened, and therefore, this voltage is called cut-in voltage.The selection of cut-in voltage should make electric light not open during steady operation.On the other hand, cut-in voltage is also less than the minimum peak that is added in the supply voltage in two main electrodes of electric light.Select as far as possible low cut-in voltage to be conducive to start rapidly electric light.The every half cycle that is docked at like this alternating voltage on electric light produces two or more start pulses provides possibility, and this is generally very favorable concerning rapid starting electric light.The electric light of working under AC power in actual applications effective value is 220V, and minimum peak is approximately 310V, and cut-in voltage is preferably chosen in 220V within the scope of about 280V.
Opening time is short is favourable to producing a high start pulse, when main capacitor is larger compared with the impact of the amplitude of hour opening time on start pulse.
According to the present invention, to be used in electric light be known to a thyristor, for example US-PS3866088.Although thyristor is specified in the starting circuit of discharge lamp in described patent description, what with regard to all situations, all relate to is the situation that starting circuit separates with electric light.Therefore,, in the situation of this high-pressure Na discharge lamp, the electric light that does not relate to outside supplemantary electrode is directly supplied with the main electrode of each electric light with the start pulse that causes starting circuit to produce.In addition, this start pulse also offers stable ballast, and electric light carrys out work by means of this ballast, and this just produces and must prevent the overload being produced by start pulse to all stable ballast protections.
According to electric light of the present invention, more preferably the thyristor in circuit is arranged between main capacitor and transformer and main capacitor is directly connected with main resistor.The moment that the structure guarantee thyristor of this optimum seeking method is opened is not depended on transformer.
In the time of starting electric light, the potential pulse that electric starting circuit produces ensures to obtain a glow discharge in discharging shell.The glow discharge produced for increasing continuously of lamp current must be maintained by the power supply being added on electric light.But, find that the voltage on electric light presents unexpected reducing immediately after thyristor is opened, result is to maintaining glow discharge and the further increase counterproductive to lamp current.
According to the present invention, in the embodiment of a best electric light, discharging shell is in parallel with a circuit of being connected by auxiliary resistance and auxiliary capacitor.By means of this series circuit, the voltage after thyristor unlatching in discharging shell keeps constant immediately substantially.Therefore, the ionization in discharging shell maintained in the time of several microseconds, and it is enough exciting a current source from connected power supply like this.Therefore thereby electric current increases and has accelerated the starting of electric light, and this normally has desirable influence to the life-span of electric light.
This lamp according to the present invention will be described referring to accompanying drawing, in the accompanying drawings:
The partial sectional view of Fig. 1 indication lamp.
The cutaway view of the crown top of burner described in Fig. 2 presentation graphs 1.
Lamp circuit diagram shown in Fig. 3 presentation graphs 1.
The remodeling circuit diagram of circuit shown in Fig. 4 presentation graphs 3.
Fig. 5 is illustrated in the voltage variety during starts of lamp.
In Fig. 1, index mark 1 represents the shell of electric light, and the neck 10 of this shell is fixed on the lamp holder 2 with sleeve pipe 20.
This shell 1 seals a discharging shell 3.Discharging shell 3 is furnished with two main electrodes 4 and 5, has a stable electric discharge in working order between lower two electrodes.Electrode 4 use sheet metals 6 by feed-through 7 and sleeve pipe 20 carry out electricity with mechanical being connected.Electrode 5 use sheet metals 8 are connected with the connecting terminal 900 of lamp holder 2 by feed-through 9.Discharging shell 3 is furnished with an outside supplemantary electrode 11.
The heat shield 16 of an aluminium has been installed between the discharging shell 3 in the shell 1 of lamp and neck 10.This heat shield 16 is used for the temperature of the circuit element in lamp holder 2 that the infrared radiation that produced by discharging shell of reflection and it is also used to prevent from causing due to infrared radiation to be increased.
Nickel sheet 17 is welded to feed-through 7 and in the time that nickel sheet 17 clamps around heat shield 16, it is engaged on around heat shield 16.So just fix heat shield in simple and effective mode.
Shown in Fig. 3 is according to the circuit diagram of lamp shown in Fig. 1.The main electrode 5 of the discharging shell 3 in figure is connected with connecting terminal 900 by feed-through 9.Main electrode 4 is connected with connecting terminal 700 by feed-through 7.A starting circuit is connected in parallel between two main electrodes 4 and 5.One end of starting circuit is connected with feed-through 7 by means of connecting terminal 701, and the other end is connected with feed-through 9 by connecting terminal 901.Starting circuit comprises a main resistor 32, this resistance and a primary coil 35a by 33, one transformers 35 of main capacitance, and a circuit series connection that thyristor 34 forms.Main capacitor 33 is directly connected with main resistor 32 with thyristor, and main capacitor 33 is directly connected with connecting terminal 701 with transformer 35a.The secondary coil 35b of transformer 35 is connected with outside supplemantary electrode 11 with feed-through 110 by other block-condenser 36.
In an improved circuit, thyristor 34 is connected between resistance 32 and connecting terminal 701.And the primary coil 35a of main capacitor 33 and transformer forms a series connection group, this series connection group is in parallel with thyristor 34.Thyristor is the pressure-sensitive opening component of a thyristor type.
The working condition of circuit arrangement is described below: in the time that AC supply voltage is added in connecting terminal 700 and 900, main capacitor 33 charges by resistance 32, when the voltage on main capacitor 33 is when to the cut-in voltage of thyristor 34, thyristor is opened and conducting.Main capacitor 33 discharges suddenly by the primary coil 35a of transformer 35, this just causes responding to a potential pulse in the secondary coil 35b of transformer, and result applies a very large transient voltage by other block-condenser 36 between outside supplemantary electrode 11 and the main electrode 4 of discharging shell 3.
Flow through the current reduction to zero of thyristor 34, switch element becomes non-conductor again, described this process is repeated subsequently, this repeats till being continued until forming a stable electric discharge between two main electrodes in discharging shell, therefore, arc voltage and the thus voltage in starting circuit, this magnitude of voltage hypothesis is the voltage on main capacitor 33, remains on the cut-in voltage lower than thyristor 34.In this case, thyristor 34 is elements of unidirectional thyristor formula, and only, in the time that additional alternating voltage has same-sign, described process is just repeated.In an embodiment by thyristor 34 the electric circuit constitutes of bidirectional thyristor formula, additional alternating voltage is in the time of contrary sign, and described process is also repeated.
In one embodiment, lamp working is at 220V, and in the AC power of 50Hz, the power loss of electric light is 113 watts.The work that combines of this lamp and a ballast, this ballast is intended for the high-voltage mercury discharging lamp work of a 125W.In the discharging shell of this lamp, except containing temperature at 300 absolute temperature, pressure is, outside the xenon of 100 kPas, to also have 25 milligrams of mercury sodium mixtures that contain 18% weight sodium.During lamp working, the luminous flux of lamp is that the arc voltage between 11000 lumens and two main electrodes is 115 volts.The component parameters of starting circuit is pressed following outfit:
Block-condenser 36 2.2nF
Secondary coil 600 circles
At electric light during starts, in the time that the time of filling is 50 milliseconds to the maximum, the charging current maximum of main capacitor is 6 milliamperes, in working order under, the electric current that flows through starting circuit is 0.35 milliampere.The start pulse producing in starting circuit is 1500 volts.This electric light of evidence is just to light a fire in the AC power of 170 volts at an effective value.
In another embodiment, relate to a kind of high-pressure Na discharge lamp, this lamp provides the stable ballast of the AC power of 220 volts of 50Hz to carry out work by one, and the power loss of this lamp is 75W; Luminous flux is that 7100 lumens and arc voltage are 100V.Discharging shell contains in the time of 300 absolute temperature, pressure is xenon and 25 milligrams of mixtures that contain 18% weight sodium of 10 kPas.The starting circuit of this lamp and the starting circuit of foregoing that lamp are just the same.The electric current that flows through circuit at the duration of work of electric light is 0.3 milliampere.The start pulse producing in starting circuit is 1500 volts, and it is that in the AC power of 170 volts, electric light is just lighted a fire that this lantern test has also proved at effective value.
In Fig. 4, shown in an improved starting circuit, in the drawings with the corresponding identical symbol for part of Fig. 3.This improvement is, a discharging shell circuit being composed in series by auxiliary resistance 38 and auxiliary capacitor 37 in parallel.
The part voltage variety during operation of electric light that Fig. 4 circuit is housed shown in Fig. 5.Curve a represents to be added in the variable quantity of the supply voltage on electric light, and curve b is illustrated in the voltage variety between two main electrodes 4 and 5, and by contrast, curve C represents to have the voltage variety between two main electrodes 4 and 5 of electric light of starting circuit shown in Fig. 3.As seen from the figure, according to this starting circuit shown in Fig. 3, open moment at thyristor, be added in voltage between two main electrodes and be to present and unexpected reduce 40.And there is not such voltage jump amount in the circuit shown in use Fig. 4.
In one embodiment, electric light, at 220 volts, is worked under the AC power of 50Hz, and the power loss of electric light is 110W.Starting circuit is pressed following outfit:
Block-condenser 3.*nF
Transformer 25 circles
Secondary coil 600 circles
During starts, the voltage variety between electrode 4 and 5 is the curve b shown in Fig. 5.
In the time of the situation of not connected by auxiliary resistance and auxiliary capacitor, the voltage variety between electrode 4 and 5 is the curve C shown in Fig. 5.The decrease of this mutation voltage approximately reaches 100 volts.
Claims (3)
1, a kind of high-pressure Na discharge lamp, it is made up of a discharging shell of being furnished with two main electrodes, stable discharging between lower two main electrodes in working order, in addition, this discharging shell is furnished with an outside supplemantary electrode, in addition, this electric light is furnished with a starting circuit, this starting circuit comprises that one by transformer, the circuit of a main capacitor and a thyristor composition, this circuit and main resistor are connected and are then connected in parallel between two electrodes, this circuit is connected with outside supplemantary electrode by the secondary coil of transformer, it is characterized in that, thyristor is a unidirectional or uncontrollable pressure-sensitive opening component of bidirectional thyristor formula, the firing current of this element in the time that the opening time is less than 10 microsecond is less than 1 milliampere.
2, lamp according to claim 1, is characterized in that, the thyristor in circuit is placed between main capacitor and transformer, and main capacitor is directly connected with main resistor.
3, lamp according to claim 1 and 2, is characterized in that, this lamp and a circuit being composed in series by auxiliary resistance and auxiliary capacitor are in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85101656.1A CN1003828B (en) | 1985-04-01 | 1985-04-01 | High-pressure sodium discharge lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85101656.1A CN1003828B (en) | 1985-04-01 | 1985-04-01 | High-pressure sodium discharge lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85101656A CN85101656A (en) | 1987-01-24 |
| CN1003828B true CN1003828B (en) | 1989-04-05 |
Family
ID=4791978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85101656.1A Expired CN1003828B (en) | 1985-04-01 | 1985-04-01 | High-pressure sodium discharge lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1003828B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100455156C (en) * | 2002-03-12 | 2009-01-21 | 电灯专利信托有限公司 | Switch equipment for high-pressure discharge lamp ignition |
-
1985
- 1985-04-01 CN CN85101656.1A patent/CN1003828B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100455156C (en) * | 2002-03-12 | 2009-01-21 | 电灯专利信托有限公司 | Switch equipment for high-pressure discharge lamp ignition |
Also Published As
| Publication number | Publication date |
|---|---|
| CN85101656A (en) | 1987-01-24 |
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| GR02 | Examined patent application | ||
| WD01 | Invention patent application deemed withdrawn after publication |