公开(公告)号：US6111368A

公开(公告)日：2000-08-29

申请号：US938651

申请日：1997-09-26

申请人： David G. Luchaco

发明人： David G. Luchaco

IPC分类号： H05B41/282 ,  H05B41/285 ,  H05B41/392 ,  H05B41/00 ,  H05B41/14

CPC分类号： H05B41/2853 ,  H05B41/3924

摘要： A ballast adapted to power a fluorescent lamp as a function of a variable input signal, includes a power stage for providing power to a fluorescent lamp; a control circuit for controlling the power stage as a function of the variable input signal; a control circuit power supply for supplying control power to the control circuit; and a monitor and enabling circuit which permits the ballast to provide power to the lamp only when characteristics of the variable input signal meet predetermined criteria.

摘要翻译： 适于作为可变输入信号的函数对荧光灯供电的镇流器包括用于向荧光灯提供电力的功率级; 控制电路，用于根据可变输入信号控制功率级; 用于向控制电路提供控制电力的控制电路电源; 以及仅当可变输入信号的特性满足预定标准时才允许镇流器向灯提供电力的监视和使能电路。

公开(公告)号：US5841239A

公开(公告)日：1998-11-24

申请号：US671277

申请日：1996-06-27

申请人： Charles R. Sullivan ,  Scott R. Jurell ,  David G. Luchaco

发明人： Charles R. Sullivan ,  Scott R. Jurell ,  David G. Luchaco

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.

公开(公告)号：US4894587A

公开(公告)日：1990-01-16

申请号：US45898

申请日：1987-05-04

申请人： Aaron Jungreis ,  Dennis Capewell ,  David G. Luchaco

发明人： Aaron Jungreis ,  Dennis Capewell ,  David G. Luchaco

IPC分类号： H05B41/392

CPC分类号： H05B41/3924 ,  Y10S315/04 ,  Y10S315/05

摘要： A high frequency dimming ballast dims to about 1 percent of rated output in a repeatable way so that parallel connected dimming ballasts will all produce the same light illumination when dimmed to a very low percentage of their rated light output. A first current sensor is connected in series with a semiconductor power switching device which is coupled to and controls power to the ballast. A second current sensor is connected directly to the lamp circuit to detect actual lamp current, particularly at low illumination conditions, for example at less than 10 percent of the rated light output. Lamp control under low illumination conditions is derived from the lamp current sensor and overrides control by the sensor in series with the transistor switch means.

摘要翻译： 高频调光镇流器以可重复的方式降至约1％的额定输出，使得并联连接的调光镇流器在调光到其额定光输出的非常低的百分比时都将产生相同的光照。 第一电流传感器与半导体功率开关器件串联连接，半导体功率开关器件与镇流器耦合并控制镇流器的功率。 第二电流传感器直接连接到灯电路以检测实际灯电流，特别是在低照度条件下，例如小于额定光输出的10％。 在低照度条件下的灯控制来自灯电流传感器，并且覆盖与晶体管开关装置串联的传感器的控制。

公开(公告)号：US4876498A

公开(公告)日：1989-10-24

申请号：US122588

申请日：1987-11-17

申请人： David G. Luchaco ,  Charles C. Houng

发明人： David G. Luchaco ,  Charles C. Houng

IPC分类号： G05F5/02 ,  H02M5/257 ,  H05B39/08

CPC分类号： H02M5/257 ,  H05B39/08 ,  Y10S315/04 ,  Y10S323/905

摘要： A low voltage two wire dimming circuit comprises voltage compensating means for regulating the RMS value of an AC voltage applied to a load and correcting means for eliminating damaging DC current that may flow through the load. The voltage compensating means adjusts the firing angle of electronic switch means disposed in the dimming circuit to compensate for fluctuations in the AC supply voltage. The correcting means advances or retards the firing angle during selected half cycles to correct for asymmetries in the AC load voltage waveform caused by excessive DC current. According to the invention, there is also provided a two wire low voltage dimming circuit without voltage compensating means but having improved dimming ability at low load currents and improved resistance to the flow of damaging DC currents.

摘要翻译： 低压双线调光电路包括用于调节施加到负载的AC电压的RMS值的电压补偿装置和用于消除可能流过负载的有害的DC电流的校正装置。 电压补偿装置调节设置在调光电路中的电子开关装置的触发角度，以补偿AC电源电压的波动。 校正装置在选定的半周期期间推进或延迟触发角，以校正由过大的直流电流引起的交流负载电压波形的不对称性。 根据本发明，还提供了一种没有电压补偿装置的双线低压调光电路，但是在低负载电流下具有改进的调光能力，并且改善了对损坏的直流电流的流动的抵抗力。

公开(公告)号：US4663570A

公开(公告)日：1987-05-05

申请号：US642072

申请日：1984-08-17

申请人： David G. Luchaco ,  Dennis Capewell

发明人： David G. Luchaco ,  Dennis Capewell

IPC分类号： H05B41/392 ,  H05B37/02 ,  H05B39/04 ,  H05B41/36

CPC分类号： H05B41/3924 ,  Y10S315/04

摘要： A high frequency gas discharge lamp dimming ballast with good line power factor is disclosed. The unit is controlled by a current sensing loop which senses control switch current rather than lamp current and employs simple circuitry with sufficiently rapid control response necessary to maintain high line power factor and stable lamp operating characteristics over a very wide range of light output. An isolated output transformer provides protection against most common miswire conditions and accurately regulates lamp energy over a wide range of input and lamp arc voltage conditions. A pulse width modulated control input provides an isolated control input for easier wiring and reduces the susceptibility of the control to noise interference.

摘要翻译： 公开了具有良好线路功率因数的高频气体放电灯调光镇流器。 该单元由感应控制开关电流而不是灯电流的电流感测回路控制，并且采用具有足够快速控制响应的简单电路，以在非常宽的光输出范围内保持高线路功率因数和稳定的灯工作特性。 一个隔离的输出变压器提供了保护，防止大多数通用的错线条件，并在宽范围的输入和灯电弧电压条件下精确地调节灯泡能量。 脉宽调制控制输入提供了一个隔离的控制输入，便于布线，并降低了控制对噪声干扰的敏感性。

公开(公告)号：US4449074A

公开(公告)日：1984-05-15

申请号：US468870

申请日：1983-02-23

申请人： David G. Luchaco

发明人： David G. Luchaco

IPC分类号： H05B37/02

CPC分类号： H05B37/0218 ,  Y02B20/46

摘要： An illumination control device controls the level of artificial lighting depending upon the intensity of natural light in the area being controlled. A single adjustment is used to set the switching point at which the illumination control device becomes operative. An indicator is provided to indicate the adjustment status before a change in the artificial light condition occurs. A filter is employed to produce turn-on and turn-off time delays which differ from one another and are automatically changed in accordance with the instantaneous light level which exists prior to a necessary circuit switching operation.

摘要翻译： 照明控制装置根据所控制的区域中的自然光的强度来控制人造照明的水平。 使用单次调整来设定照明控制装置的切换点。 在发生人造光条件变化之前提供指示器来指示调节状态。 使用滤波器来产生彼此不同的导通和关断时间延迟，并且根据在必要的电路切换操作之前存在的瞬时光级自动地改变。