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公开(公告)号：US5841239A
公开(公告)日：1998-11-24
申请号：US671277
申请日：1996-06-27
IPC分类号： H05B41/285 , H05B41/392 , G05F1/00
CPC分类号： H05B41/3927 , H05B41/2851 , H02M2001/346 , Y02B20/19 , Y02B70/1491 , Y10S315/04 , Y10S315/07
摘要： A dimming control circuit provides power from an ac source to a compact fluorescent lamp. The circuit generally includes a resonant half-bridge inverter driven by a pulse-duration-modulated voltage, for providing a high-frequency ac voltage between the lamp electrodes. A combination inductive and capacitive snubber circuit reduces switching losses in the inverter and increases the efficiency of the dimming circuit. A low-voltage transformer connected across the resonant portion of the inverter provides voltage to heat the lamp filaments. The filament voltage is substantially constant over a range of pulse-durations providing a dimming range from about 100% to 1% of full light output. A power supply circuit having a power factor of about 0.95 provides both high-voltage and low-voltage dc power to the dimming circuit with minimal losses. A shutdown circuit is provided to shut off power to the lamp if the dimming circuit is miswired or a ground fault occurs.
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公开(公告)号：US5001386A
公开(公告)日：1991-03-19
申请号：US455644
申请日：1989-12-22
IPC分类号： H05B41/14 , H05B41/232 , H05B41/24 , H05B41/285 , H05B41/392
CPC分类号： H05B41/3927 , H05B41/2858 , Y02B20/19 , Y10S315/04
摘要： A dimming circuit provides power from an ac source to a compact fluorescent lamp. The circuit generally includes a resonant circuit driven by a high-frequency switching inverter. The resonant circuit is essentially an ac current source and provides sinusoidal current to the lamp, which loads the resonant circuit in parallel. A small amount of dc current is simutaneously provided to the lamp. The resultant asymmetric current waveform flowing through the lamp substantially eliminates striation over a dimming range from about 100% to 1% of full light output.
摘要翻译： 调光电路提供从交流电源到紧凑型荧光灯的电源。 该电路通常包括由高频开关逆变器驱动的谐振电路。 谐振电路基本上是交流电源，并且向灯提供正弦电流，其并联加载谐振电路。 与灯同时提供少量的直流电流。 所产生的流过灯的非对称电流波形基本上消除了在全光输出的约100％至1％的调光范围内的条纹。
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公开(公告)号：US5173643A
公开(公告)日：1992-12-22
申请号：US543271
申请日：1990-06-25
IPC分类号： H05B41/285 , H05B41/392
CPC分类号： H05B41/3927 , H05B41/2851 , H02M2001/346 , Y02B20/19 , Y02B70/1491 , Y10S315/04 , Y10S315/07
摘要： A dimming control circuit provides power from an ac source to a compact fluorescent lamp. The circuit generally includes a resonant half-bridge inverter driven by a pulse-duration-modulated voltage, for providing a high-frequency ac voltage between the lamp electrodes. A combination inductive and capacitive snubber circuit reduces switching losses in the inverter and increases the efficiency of the dimming circuit. A low-voltage transformer connected across the resonant portion of the inverter provides voltage to heat the lamp filaments. The filament voltage is substantially constant over a range of pulse-durations providing a dimming range from about 100% to 1% of full light output. A power supply circuit having a power factor of about 0.95 provides both high-voltage and low-voltage dc power to the dimming circuit with minimal losses. A shutdown circuit is provided to shut off power to the lamp if the dimming circuit is miswired or a ground fault occurs.
摘要翻译： 调光控制电路提供从交流电源到紧凑型荧光灯的电力。 电路通常包括由脉冲持续时间调制电压驱动的谐振半桥逆变器，用于在灯电极之间提供高频交流电压。 组合电感和电容缓冲电路减少了逆变器中的开关损耗，并提高了调光电路的效率。 连接在逆变器谐振部分的低压变压器提供电压以加热灯丝。 灯丝电压在脉冲持续时间的范围内基本上是恒定的，从而提供约100％至1％全光输出的调光范围。 功率因数为约0.95的电源电路以最小的损耗向调光电路提供高压和低压直流电力。 如果调光电路发生错误接线或发生接地故障，则提供关闭电路以切断灯的电源。
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公开(公告)号：US5144205A
公开(公告)日：1992-09-01
申请号：US450185
申请日：1989-12-12
申请人： Eric R. Motto , Scott R. Jurell
发明人： Eric R. Motto , Scott R. Jurell
IPC分类号： H05B41/233 , H05B41/38 , H05B41/392
CPC分类号： H05B41/3924 , H05B41/382 , Y02B20/19 , Y02B20/204 , Y10S315/02 , Y10S315/07
摘要： A dimming system provides power from a switch-controlled power source in series with a leakage auto-transformer to a compact fluorescent lamp. The system incorporates a high-frequency resonant converter that provides high voltages to strike and maintain an electric discharge in the lamp. The converter is loaded in parallel by the lamp, whose impedance damps the converter to stabilize lamp operation. An inductor, connected between the leakage auto-transformer and the resonant converter, isolates the switch-controlled power source from the high-frequency voltage. The system can be used with a variety of standard leakage reactance auto-transformers to provide full-range dimming of compact fluorescent lamps from 5 to 100 percent light output with minimal flicker.
摘要翻译： 调光系统将开关控制电源的电源与泄漏自动变压器串联连接到紧凑型荧光灯。 该系统包含一个高频谐振转换器，它提供高电压来击打并保持灯中的放电。 转换器由灯并联，其阻抗阻止转换器稳定灯的工作。 连接在泄漏自动变压器和谐振转换器之间的电感器将开关控制的电源与高频电压隔离开来。 该系统可用于各种标准漏电自动变压器，以最小的闪烁提供5至100％光输出的紧凑型荧光灯的全范围调光。
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公开(公告)号：US5055742A
公开(公告)日：1991-10-08
申请号：US353984
申请日：1989-05-18
申请人： Scott R. Jurell , Eric R. Motto , Gordon E. Windows, Jr. , David G. Luchaco , Dennis M. Capewell , Donald F. Hausman , Joel S. Spira
发明人： Scott R. Jurell , Eric R. Motto , Gordon E. Windows, Jr. , David G. Luchaco , Dennis M. Capewell , Donald F. Hausman , Joel S. Spira
IPC分类号： H05B41/38 , H05B41/392
CPC分类号： H05B41/3924 , H05B41/382 , Y02B20/204
摘要： A dimming system, which provides a time-varying current from a power source between the electrodes of a gas discharge lamp, simultaneously provides high-frequency, low-level current between the electrodes to sustain an electric discharge in the lamp when the time varying current alone is insufficient. The system provides reduced starting stress in the lamp and, therefore, longer lamp life by delaying the formation of an arc discharge, during start-up, until the electrodes have been heated. The system can be used with standard magnetic ballasts to provide full-range dimming of gas discharge lamps from 3 to 100 percent light output with minimal striations, lamp drop out, and flicker.
摘要翻译： 在气体放电灯的电极之间提供来自电源的时变电流的调光系统同时在电极之间提供高频，低电平电流，以在时变电流时维持灯中的放电 一个人不够。 该系统在启动期间，通过延迟电弧放电的形成，直到电极被加热，从而在灯中提供降低的启动应力，并因此延长灯的寿命。 该系统可与标准的电子镇流器一起使用，以最小的条纹，灯掉落和闪烁的方式，将气体放电灯的全范围调光范围从3％到100％的光输出。
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公开(公告)号：US5041763A
公开(公告)日：1991-08-20
申请号：US553201
申请日：1990-07-13
IPC分类号： H05B41/285 , H05B41/392
CPC分类号： H05B41/3927 , H05B41/2858 , Y02B20/19 , Y10S315/04
摘要： A dimming circuit provides power from an ac source to a compact fluorescent lamp. The circuit generally includes a resonant circuit driven by a high-frequency switching inverter and a current feedback control system. The circuit is essentially an ac current source of unusually high impedance and provides substantially symmetrical high-frequency current to the lamp. This allows flicker-free dimming of compact fluorescent lamps over a wide range with good light output stability. A small amount of dc or low-frequency ac current may be simultaneously provided to the lamp. The resulting composite current waveform flowing through the lamp substantially eliminates visible striations over a dimming range from about 100% to 1% of full light output.
摘要翻译： 调光电路提供从交流电源到紧凑型荧光灯的电源。 该电路通常包括由高频开关逆变器和电流反馈控制系统驱动的谐振电路。 该电路基本上是异常高阻抗的交流电源，并向灯提供基本对称的高频电流。 这允许紧凑型荧光灯在宽范围内无闪烁调光，具有良好的光输出稳定性。 可以同时向灯提供少量的直流或低频交流电流。 所产生的流过灯的复合电流波形基本上消除了在全光输出的约100％至1％的调光范围内的可见条纹。
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