摘要:
A discharge lamp with excellent arc stability and excellent durability in which the use level of thoriated tungsten is restrained has an anode and a cathode in the interior of a discharge vessel, wherein said cathode is made up from a thoriated tungsten part with a tungsten filling ratio of at least 90 vol.-% and a main body part connected to said thoriated tungsten part and consisting of pure tungsten, wherein a ratio ST/S of a side surface area ST of said thoriated tungsten part and a side surface area S of said cathode is in a range of from 0.005 to 0.15, with the proviso that, in case the cathode has a length in the direction of the cathode axis which exceeds twice the maximum diameter of the cathode, a side surface area S is used for calculating the ratio ST/S which corresponds to the side surface area where the distance along the cathode axis from a tip end adjacent to the anode is twice the maximum diameter of the cathode.
摘要翻译:具有优异的电弧稳定性和优异耐久性的放电灯,其中钍钨的使用水平被限制在放电容器的内部具有阳极和阴极,其中所述阴极由具有钨填充比的钍钨部分 至少90体积%,以及连接到所述钍钨部分并由纯钨组成的主体部分,其中所述钍钨部分的侧表面积ST和所述钍钨部分的侧表面积S的比率ST / S 阴极在0.005至0.15的范围内,条件是在阴极的长度方向上阴极轴线的长度超过阴极最大直径的两倍的情况下,侧面积S用于计算 与沿着阴极轴线距离与阳极相邻的尖端的距离为两倍于阴极最大直径的侧表面积的比率ST / S。
摘要:
A discharge lamp lighting apparatus includes a discharge container, a pair of electrodes and a power supply apparatus. An alternating current of a frequency, which is lower than stationary frequency, is inserted periodically into the alternating current of stationary frequency. When a lighting current value of the discharge lamp is smaller than a predetermined lower limit, the frequency is set as predetermined minimum frequency. When the lighting current value of a discharge lamp is larger than a predetermined maximum value, the frequency is set as predetermined maximum frequency. When a lighting current value of the discharge lamp is between the lower limit and the maximum value, the frequency is set as a selected frequency corresponding to the lighting current value. The selected frequency increases according to an increase of frequency change as a lighting current value increases.
摘要:
A device for operating a discharge lamp of the alternating current operating type has a high pressure discharge lamp with a silica glass discharge vessel in which a pair of opposed electrodes are located and on which a trigger electrode is located, a feed device which supplies an alternating discharge current to the high pressure discharge lamp, the feed device having a starter circuit, an inverter circuit with at least two switching devices; a coil which is located downstream of the inverter circuit and is series-connected to the discharge lamp; and a control element which produces on/off driving in alternation with a dead time, and in which the inductance of the coil is at most 210 μH.
摘要:
An emission device for an ultra-high pressure mercury lamp which maintains an electrode tip shape by which a stable discharge can always be carried out is achieved for a short arc ultra-high pressure mercury lamp with silica glass arc tube containing a pair of opposed electrodes spaced apart a distance of at most 2 mm and in which the arc tube is filled with at least 0.15 mg/mm3 of mercury, a rare gas and a halogen in the range from 1×10−6 μmole/mm3 to 1×10−2 μmole/mm3; by providing an operating device which produces a current feed by which the surface of the tip of at least one of the electrodes is shifted into a molten state during lamp operation.
摘要翻译:对于具有总是能够进行稳定放电的电极末端形状的超高压汞灯的发射装置,对于具有包含一对相对电极的石英玻璃电弧管的短弧超高压汞灯实现 间距为至多2mm的距离,其中电弧管填充有至少0.15mg / mm 3的汞,稀有气体和卤素在1×10 -3以下的范围内, 6毫马/毫米3至1×10 -2 / m 3 / mm 3; 通过提供一种操作装置,该操作装置产生电流进料,在灯运行期间,至少一个电极的尖端的表面被转换成熔融状态。
摘要:
A device which improves the starting of a high pressure discharge lamp containing a large amount of mercury, in which the amount of mercury adhering to the lamp electrodes is not the same, by shortening the formation time of the glow discharge in order to reduce the sputtering of the electrodes to a minimum. When the discharge lamp starts, an AC voltage with rectangular waves produced by the full bridge circuit is applied to the discharge lamp. Next, a high voltage pulse is superimposed and applied by an igniter device; the pulse is synchronized to the polarity of the above described AC voltage with rectangular waves. As a result, an alternating current discharge is started in the discharge lamp. Then, the ON/OFF state of the switching devices in the full bridge circuit is fixed and a direct current voltage is applied to the lamp. After a pre-selected time has expired after the transition into direct current operation, the full bridge circuit is operated such that rectangular alternating current waves form. The AC voltage with rectangular waves is then applied to the discharge lamp and a transition into steady-state operation is carried out.
摘要:
A high pressure discharge lamp light source device is provided having a quartz glass discharge vessel enclosing two opposed electrodes that are spaced apart by at most 2.0 mm, each electrode having a projection formed at a tip end thereof, at least 0.20 mg/mm3 of mercury and a halogen; and a power supply device for supplying alternating current to the lamp, The power supply device is adapted to switch between a nominal electric power lighting mode and a low electric power lighting mode having a defined current value in a range of 40 to 70% of a nominal electric power consumption. In the low power mode, the power supply alternately supplies a base current in a range between 100 Hz and 5 kHz a boost current having a higher current value than that of the base current.
摘要翻译:提供一种高压放电灯光源装置,其具有包围间隔开至多2.0mm的两个相对电极的石英玻璃放电容器,每个电极具有形成在其末端的突起,至少0.20mg / mm 3的汞 和卤素; 以及用于向灯提供交流电的电源装置。电源装置适于在具有限定电流值的标称电力照明模式和低电力照明模式之间切换,所述限定电流值在40至70%的范围内 标称电力消耗。 在低功率模式下,电源交替地在100Hz和5kHz之间的范围内提供具有比基极电流更高的电流值的升压电流的基极电流。
摘要:
It is an object of the present invention to provide a high pressure discharge lamp capable of shifting to arc discharge without going out at initial lighting. The object of the invention is achieved by a high discharge lamp in which mercury of 0.15 mg/mm3 is enclosed, and a power supply apparatus. The power supply apparatus comprises a chopper circuit including a switching element, and a smoothing circuit including at least one smoothing capacitor connected to an output terminal of the chopper circuit, and a feedback system control circuit which drives the switching element of the chopper circuit, wherein a parallel circuit comprising a resistor and a second switching circuit is in series connected to an output terminal of the smoothing circuit, and at least at time of initial lighting, the second switching circuit is turned off, and when the lamp is stabilized, the second switching element is turned on.
摘要翻译:本发明的目的是提供一种能够在初始照明时不熄灭的电弧放电的高压放电灯。 本发明的目的是通过封闭0.15mg / mm 3汞的高放电灯和电源装置实现。 电源装置包括包括开关元件的斩波电路和包括连接到斩波电路的输出端子的至少一个平滑电容器的平滑电路和驱动斩波电路的开关元件的反馈系统控制电路,其中, 包括电阻器和第二开关电路的并联电路串联连接到平滑电路的输出端子,并且至少在初始点亮时,第二开关电路被断开,并且当灯稳定时,第二 开关元件导通。
摘要:
A device for operating a discharge lamp of the short arc type having a feed device which supplies a direct current to the discharge lamp when operation starts and an alternating current afterwards, in which the feed device supplies a direct current which is smaller than the rated current to the discharge lamp at the start of operation, and a direct current which is at least as large as the rated current, afterwards. A control which ascertains whether the discharge lamp at the start of operation is in a hot or cold start operating state, and which establishes one of the following parameters based on whether the hot or cold operating state ascertained to exist: the value of the direct current which is at least as great as the rated current; the feed duration of the direct current which is at least as great as the rated current.
摘要:
A short arc ultra-high pressure mercury lamp, at least one of the electrodes of which has a melted part towards the electrode head and a coil part which extends from the melted part continuously and integrally with it in a direction away from the electrode head, avoids blackening of the tube wall and achieves a long service life by the provision of a power supply which supplies the discharge lamp with direct current when operation is starting and afterwards supplies it with an alternating current, the direct current supplied by the power supply to the discharge lamp being initially 0.3 to 0.6 times as great as the rated current and afterwards increasing to 1.0 to 2.0 times are great as the rated current.
摘要:
A discharge lamp lighting apparatus includes a discharge container, a pair of electrodes and a power supply apparatus. An alternating current of a frequency, which is lower than stationary frequency, is inserted periodically into the alternating current of stationary frequency. When a lighting current value of the discharge lamp is smaller than a predetermined lower limit, the frequency is set as predetermined minimum frequency. When the lighting current value of a discharge lamp is larger than a predetermined maximum value, the frequency is set as predetermined maximum frequency. When a lighting current value of the discharge lamp is between the lower limit and the maximum value, the frequency is set as a selected frequency corresponding to the lighting current value. The selected frequency increases according to an increase of frequency change as a lighting current value increases.