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1. 发明授权

US5623187A Controller for a gas discharge lamp with variable inverter frequency and with lamp power and bus voltage control 失效
标题翻译：用于具有变频器频率和灯功率和总线电压控制的气体放电灯的控制器
公开(公告)号：US5623187A
公开(公告)日：1997-04-22
申请号：US366337
申请日：1994-12-28
申请人： Paulo Caldeira , Lawrence Bourdillon , Antonius H. Holtslag , Jinrong Qian
发明人： Paulo Caldeira , Lawrence Bourdillon , Antonius H. Holtslag , Jinrong Qian
IPC分类号： H05B41/292 , H05B41/392 , G05F1/00
CPC分类号： H05B41/3928 , H05B41/2928 , Y02B20/208 , Y10S315/07
摘要： A high frequency HID ballast includes an inverter for operating the HID lamp at high frequency and an arc instability controller which detects and adjusts the operating frequency of the inverter to avoid acoustic resonance of the discharge arc. The ballast ensures that the power delivered to the lamp remains substantially constant despite variations in the gain of the inverter which occur with changes in the operating frequency. Power control is accomplished by sensing lamp power and controlling a boost converter to vary the bus voltage feeding the inverter. The boost converter is also controlled during lamp ignition, when the load provided by the HID lamp is low, to clamp the bus voltage at a predetermined level. The ballast employs universal techniques suitable for operating HID lamps of different types, wattages and manufacturers despite the occurrence of acoustic resonance/arc instabilities among these lamps over a fairly broad frequency range.
摘要翻译：高频HID镇流器包括用于高频操作HID灯的逆变器和检测并调节逆变器的工作频率以避免放电电弧的声共振的电弧不稳定性控制器。镇流器确保尽管随着工作频率的变化而发生变频器的增益的变化，但输送到灯的功率保持基本恒定。功率控制通过检测灯功率和控制升压转换器来改变馈送逆变器的总线电压来实现。在灯点亮期间，当HID灯提供的负载较低时，也可以控制升压转换器，以将总线电压钳位在预定的电平。镇流器采用通用技术，适用于操作不同类型，功率和制造商的HID灯，尽管在相当宽的频率范围内这些灯之间发生声共振/电弧不稳定。

2. 发明授权

US5569984A Method and controller for detecting arc instabilities in gas discharge lamps 失效
标题翻译：气体放电灯电弧不稳定性检测方法及控制器
公开(公告)号：US5569984A
公开(公告)日：1996-10-29
申请号：US366333
申请日：1994-12-28
申请人： Antonius H. Holtslag
发明人： Antonius H. Holtslag
IPC分类号： H05B41/282 , H05B41/292 , H05B37/02
CPC分类号： H05B41/2928 , Y02B20/208
摘要： A method for detecting arc instabilities in a gas discharge lamp by evaluating the deviations of an electrical parameter of the lamp. A method suitable for detecting frequencies at which acoustic resonance induced instabilities occur evaluates the deviations measured over a range of frequencies. Selection of an operating frequency to avoid acoustic resonance is based on an evaluation of the deviations, such as the frequency at which the lowest standard deviation occurs for the electrical parameter measured. Favorably, the electrical parameter used is the conductivity, which provides high insensitivity to noise, is independent of ballast topology, and enables detection of acoustic resonance at levels not visible to the human eye. A control scheme tracks acoustic resonance during run-up of the lamp and quickly selects a favorable operating frequency after the lamp reaches steady-state. Resonance detection is achieved both during run-up and the steady state substantially without inducing visible flicker. The method and ballast employ universal techniques suitable for operating HID lamps of different types, wattages and manufacturers despite the occurrence of acoustic resonance/arc instabilities among these lamps over a fairly broad frequency range.
摘要翻译：一种用于通过评估灯的电参数的偏差来检测气体放电灯中的电弧不稳定性的方法。适用于检测声共振引起的不稳定性的频率的方法评估在频率范围上测量的偏差。选择工作频率以避免声共振是基于偏差的评估，例如测量的电参数发生最低标准偏差的频率。有利地，所使用的电参数是导电性，其对噪声提供高度不敏感性，与镇流器拓扑无关，并且能够在人眼不可见的水平处检测声共振。控制方案在灯起动期间跟踪声共振，并在灯达到稳态后快速选择有利的工作频率。在启动期间和稳态下均实现谐振检测，而不引起可见的闪烁。该方法和镇流器采用适用于操作不同类型，功率和制造商的HID灯的通用技术，尽管在相当宽的频率范围内在这些灯之间发生声共振/电弧不稳定性。

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