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1. 发明授权

US5691605A Electronic ballast with interface circuitry for multiple dimming inputs 失效
标题翻译：具有多个调光输入接口电路的电子镇流器
公开(公告)号：US5691605A
公开(公告)日：1997-11-25
申请号：US512868
申请日：1995-08-09
申请人： Yongping Xia , Joshua Zhu , Sreeraman Venkitasubrahmanian , Raj Jayaraman , Thomas Farkas
发明人： Yongping Xia , Joshua Zhu , Sreeraman Venkitasubrahmanian , Raj Jayaraman , Thomas Farkas
IPC分类号： H05B41/38 , H05B37/02 , H05B41/285 , H05B41/36 , H05B41/392 , H02B37/02
CPC分类号： H05B41/2855 , H05B37/0263 , H05B41/2985 , H05B41/36 , H05B41/3921 , H05B41/3924 , Y10S315/04
摘要： A lamp controller includes an interface circuit, or receiver, which receives an input signal and decodes control signals supplied from a transmitting device, such as a power line wall controller, according to at least two of the following communication techniques: phase angle control, step control, and coded control. The receiver tests the input signal and identifies which type of control technique is employed by the wall controller connected to the lamp controller. The receiver then decodes the control command from the input signal. In a disclosed embodiment, the lamp controller is gas discharge lamp dimming ballast having a two wire input for connection to the hot dimmed and neutral leads of the power line controller. The ballast has an improved topology in which a pre-conditioner supplies a substantially constant DC voltage to a ballast stage including an inverter, a resonant tank output and a control circuit. The dim signal output by the receiver is independent of the DC rail voltage and, in combination with the maintenance of a substantially constant DC rail voltage, permits of improved dimming control while providing the ease of installation of a two wire ballast.
摘要翻译：灯控制器包括接口电路或接收器，接口电路或接收器根据以下通信技术中的至少两个接收输入信号和解码从诸如电力线壁控制器的发送设备提供的控制信号：相位角控制，步骤控制和编码控制。接收机测试输入信号，并识别连接到灯控制器的墙壁控制器采用哪种类型的控制技术。然后，接收器从输入信号解码控制命令。在公开的实施例中，灯控制器是具有两线输入的气体放电灯调光镇流器，用于连接到电力线控制器的热调光和中性线。镇流器具有改进的拓扑结构，其中预调节器向包括逆变器，谐振回路输出和控制电路的镇流器提供基本上恒定的DC电压。由接收器输出的暗信号与直流轨道电压无关，并且与基本上恒定的直流轨电压的维持相结合，允许改进的调光控制，同时提供双线镇流器的易于安装。

2. 发明授权

US5872429A Coded communication system and method for controlling an electric lamp 失效
标题翻译：用于控制电灯的编码通信系统和方法
公开(公告)号：US5872429A
公开(公告)日：1999-02-16
申请号：US824024
申请日：1997-03-25
申请人： Yongping Xia , Sreeraman Venkitasubrahmanian , Raj Jayaraman , Thomas Farkas
发明人： Yongping Xia , Sreeraman Venkitasubrahmanian , Raj Jayaraman , Thomas Farkas
IPC分类号： H05B37/02 , H05B41/282 , H05B41/298 , H05B41/392
CPC分类号： H05B41/2828 , H05B37/0263 , H05B41/2981 , H05B41/3921 , Y10S315/04
摘要： A communication method particularly suited for lighting control employs encoding of perturbations in a voltage signal having a fundamental period with a nominal waveform. A control period includes a pre-selected number of fundamental periods of the voltage signal. Different control commands are indicated by imposing a selected perturbation, such as a phase cut, on the nominal waveform with a respective occurrence signature within the control period. The control commands are decoded from the voltage signal by detecting the occurrence signature of the perturbations within each control period. Decoding is accomplished by differentiating the nominal waveform to detect encoded perturbations. The technique is particularly suited for two-wire dimming applications for gas discharge lamps, in which the voltage signal carrying the encoded commands is the sinusoidal mains voltage powering the ballast, since the encoded perturbations may be small enough so that lamp flicker is avoided even with encoded signals on the line voltage. In a favorable embodiment for dimming, no perturbations are introduced on the line voltage unless a change in the operating characteristic, for example the light level, of the electric lamp is desired. This has the advantage that when lamp operation is to be kept constant, no distortions are imposed on the mains voltage, so that flicker of the lamp(s) is completely avoided and there are no adverse effects to the power factor, THD or component stress.
摘要翻译：特别适用于照明控制的通信方法使用具有标称波形的基本周期的电压信号中的扰动编码。控制周期包括电压信号的预选数量的基本周期。通过在控制周期内具有相应的发生签名在标称波形上施加选择的扰动（例如相位切除）来指示不同的控制命令。通过检测每个控制周期内扰动的发生特征，从电压信号对控制命令进行解码。通过区分标称波形来检测编码的扰动来完成解码。该技术特别适用于气体放电灯的双线调光应用，其中携带编码命令的电压信号是为镇流器供电的正弦电源电压，因为编码的扰动可能足够小，以便避免灯闪烁，即使使用编码信号的线路电压。在用于调光的有利实施例中，除非需要电灯的工作特性（例如光级）的改变，否则不会在线路电压上引入扰动。这样做的优点在于，当灯管运行保持恒定时，不会对电源电压造成失真，从而完全避免了灯的闪烁，并且对功率因数，THD或分量应力没有不利影响。

3. 发明授权

US5604411A Electronic ballast having a triac dimming filter with preconditioner offset control 失效
标题翻译：电子镇流器具有预调节偏移控制的三端双向可控硅调光滤波器
公开(公告)号：US5604411A
公开(公告)日：1997-02-18
申请号：US422198
申请日：1995-03-31
申请人： Sreeraman Venkitasubrahmanian , Gert W. Bruning , Paul Veldman , Thomas Farkas , Raj Jayaraman , Yongping Xia
发明人： Sreeraman Venkitasubrahmanian , Gert W. Bruning , Paul Veldman , Thomas Farkas , Raj Jayaraman , Yongping Xia
IPC分类号： H05B41/28 , H05B41/392 , G05F1/00
CPC分类号： H05B41/3924 , H05B41/28 , Y10S315/04
摘要： A dimming ballast for use with a phase control dimmer, and particularly a triac dimmer, includes an EMI filter selected with a high impedance to avoid excessive voltage and peak currents in the filter due to resonance with the phase controlled AC waveform at low conduction angles, when the load presented by the lamp is low. The EMI filter includes a filter capacitor connected at the output of a rectifier. The ballast also includes circuitry to sense the rectified DC voltage and to discharge the filter capacitor when the rectified voltage is at or near zero, to thereby keep the EMI filter loaded and prevent misfiring of the triac dimmer. In a favorable embodiment, the sensing and discharge function is carried out by a pre-conditioner of the switched-mode type.
摘要翻译：与相位控制调光器特别是三端双向可控硅调光器一起使用的调光镇流器包括由高阻抗选择的EMI滤波器，以避免由于在低导通角下与相位受控AC波形的谐振而导致滤波器中过大的电压和峰值电流，当灯呈现的负载较低时。 EMI滤波器包括连接在整流器输出端的滤波电容器。镇流器还包括用于感测整流的直流电压并在整流电压处于或接近零时对滤波电容器进行放电的电路，从而保持EMI滤波器的负载并防止三端双向可控硅调光器的失火。在有利的实施例中，感测和放电功能由切换模式类型的预调节器来执行。

4. 发明授权

US5559395A Electronic ballast with interface circuitry for phase angle dimming control 失效
标题翻译：具有接口电路的电子镇流器，用于相位角调光控制
公开(公告)号：US5559395A
公开(公告)日：1996-09-24
申请号：US414859
申请日：1995-03-31
申请人： Sreeraman Venkitasubrahmanian , Thomas Farkas , Raj Jayaraman , Yongping Xia
发明人： Sreeraman Venkitasubrahmanian , Thomas Farkas , Raj Jayaraman , Yongping Xia
IPC分类号： H05B37/02 , H05B41/285 , H05B41/36 , H05B41/392
CPC分类号： H05B41/2985 , H05B37/0263 , H05B41/2855 , H05B41/36 , H05B41/3921 , H05B41/3924 , Y10S315/04
摘要： A gas discharge lamp dimming ballast has a two wire input for connection to the hot dimmed and neutral leads of a phase control dimmer. The ballast has an improved topology in which a pre-conditioner supplies a substantially constant DC voltage to a ballast stage including an inverter, a resonant tank output and a control circuit. A dimming interface circuit derives a dimming signal having a voltage equal to the average value of the rectified output voltage of a full-bridge rectifier feeding the pre-conditioner circuit. The dim signal is independent of the DC rail voltage and, in combination with the maintenance of a substantially constant DC rail voltage, permits of improved dimming control while providing the ease of installation of a two wire ballast. The response time of the interface circuit relative to the pre-conditioner is selected to avoid power imbalances. The ballast also includes an EMI filter and circuitry to prevent capacitive hold-up by the EMI filter of the rectified voltage to preserve the conduction angle for the interface circuit.
摘要翻译：气体放电灯调光镇流器具有两线输入，用于连接到相位控制调光器的热调光和中性线。镇流器具有改进的拓扑结构，其中预调节器向包括逆变器，谐振回路输出和控制电路的镇流器提供基本上恒定的DC电压。调光接口电路导出具有等于馈送预调节器电路的全桥整流器的整流输出电压的平均值的电压的调光信号。昏暗的信号与直流轨道电压无关，并且与基本上恒定的直流轨道电压的维持相结合，允许改进的调光控制，同时提供双线镇流器的易于安装。选择接口电路相对于预调节器的响应时间以避免电源不平衡。镇流器还包括EMI滤波器和电路，用于防止EMI滤波器对整流电压的电容性保持，以保持接口电路的导通角。

5. 发明授权

US5382881A Ballast stabilization circuitry for eliminating moding or oscillation of the current envelope in gas discharge lamps and method of operating 失效
标题翻译：用于消除气体放电灯中的电流包络的调制或振荡的镇流器稳定电路及其操作方法
公开(公告)号：US5382881A
公开(公告)日：1995-01-17
申请号：US997989
申请日：1992-12-28
申请人： Thomas Farkas , Sreeraman Venkitasubrahmanian
发明人： Thomas Farkas , Sreeraman Venkitasubrahmanian
IPC分类号： H05B41/02 , H05B41/24 , H05B41/298 , H05B41/392 , G05F1/00
CPC分类号： H05B41/392 , H05B41/2988 , Y10S315/05 , Y10S315/07
摘要： A ballast stabilization arrangement is provided for minimizing or eliminating lamp current oscillation, or moding, of gas discharge lamps, such as fluorescent lamps, and a method for carrying out this arrangement is described. This is carried out by adding a frequency response zero to the current circuitry in a ballast. An example of this circuitry includes a feedback network where a sensed lamp current signal is compared with a reference signal by an error amplifier having a resistance placed in series with its feedback capacitance to implement the zero in the frequency response of the control circuit.
摘要翻译：提供了一种用于最小化或消除诸如荧光灯的气体放电灯的灯电流振荡或调制的镇流器稳定装置，并且描述了用于执行这种布置的方法。这通过在镇流器中的当前电路添加频率响应零来实现。该电路的示例包括反馈网络，其中感测到的灯电流信号与具有与其反馈电容串联的电阻的误差放大器与参考信号进行比较，以实现控制电路的频率响应中的零。

6. 发明申请

US20060049811A1 Output voltage ripple reduction technique for burst mode operation of power converter 审中-公开
标题翻译：功率转换器突发模式运行的输出电压纹波降低技术
公开(公告)号：US20060049811A1
公开(公告)日：2006-03-09
申请号：US11213625
申请日：2005-08-26
申请人： Thomas Farkas
发明人： Thomas Farkas
IPC分类号： G05F1/56
CPC分类号： H02M3/158 , H02M2001/0032 , Y02B70/16
摘要： A power converter is controlled by a control circuit that includes a burst mode operation during low load conditions. A compensation circuit modifies a control signal to reduce the number of switch cycles during a burst. The compensation circuit includes a time-variant offset to the control signal that is removed when the power converter input signal is connected to low voltage.
摘要翻译：功率转换器由在低负载条件下包括突发模式操作的控制电路控制。补偿电路修改控制信号以减少突发期间的开关周期数。补偿电路包括当电力转换器输入信号连接到低电压时被去除的控制信号的时变偏移。

7. 发明授权

US06304041B1 Self-oscillating dimmable gas discharge lamp ballast 失效
标题翻译：自振荡可调光气体放电灯镇流器
公开(公告)号：US06304041B1
公开(公告)日：2001-10-16
申请号：US09729752
申请日：2000-12-06
申请人： Thomas Farkas , Emad Andarawis Andarawis
发明人： Thomas Farkas , Emad Andarawis Andarawis
IPC分类号： G05F100
CPC分类号： H05B41/2827 , H05B41/3921 , H05B41/3924 , Y02B20/185 , Y10S315/04 , Y10S315/07
摘要： A ballast includes a resonant load circuit having a resonant inductance and a resonant capacitance. The load circuit couples a.c. current to a gas discharge lamp. A self-oscillating complementary converter circuit of the ballast induces a.c. current in the resonant load circuit. The converter circuit includes a pair of switches serially connected between a d.c. voltage bus and a reference bus. Respective reference nodes of the switches are interconnected at a common node through which the induced a.c. current flows, and respective control nodes of the switches are substantially directly interconnected. A gate drive circuit controls the switches. The gate drive circuit includes a drive winding connected to the control nodes. The drive winding is mutually coupled to the resonant inductance for sensing current therein, and an inductor is serially connected to the drive winding and to the common node. A clamping circuit is directly coupled across terminals of the inductor of the gate drive circuit and controls voltage across the inductor in response to an error signal. The error signal represents the difference between a user-selectable signal and a feedback signal that represents a time-averaged value of a lamp operating parameter. The ballast circuit of the invention allows a user to adjust the output of the lamp while it operates. The ballast circuit improves over conventional ballast circuits by eliminating a bulky mutually coupled winding, thereby reducing ballast mass and volume.
摘要翻译：镇流器包括具有谐振电感和谐振电容的谐振负载电路。负载电路耦合a.c. 电流到气体放电灯。镇流器的自振荡互补转换器电路引起电流。谐振负载电路中的电流。转换器电路包括一对串联连接在直流电源之间的开关。电压总线和参考总线。交换机的各个参考节点在一个公共节点上互连，通过该节点引导的交流电流流动，并且开关的各个控制节点基本上直接相互连接。门驱动电路控制开关。栅极驱动电路包括连接到控制节点的驱动绕组。驱动绕组相互耦合到谐振电感以感测其中的电流，并且电感器串联连接到驱动绕组和公共节点。钳位电路直接耦合在栅极驱动电路的电感器的端子上，并响应于误差信号控制电感器两端的电压。误差信号表示用户可选择信号和表示灯操作参数的时间平均值的反馈信号之间的差异。本发明的镇流器电路允许用户在操作时调节灯的输出。镇流器电路通过消除庞大的相互耦合的绕组而改善了传统的镇流器电路，从而降低了镇流器的质量和体积。

8. 发明申请

US20060226820A1 Overcurrent protection for power converters 审中-公开
标题翻译：电源转换器的过电流保护
公开(公告)号：US20060226820A1
公开(公告)日：2006-10-12
申请号：US11372734
申请日：2006-03-10
申请人： Thomas Farkas
发明人： Thomas Farkas
IPC分类号： G05F1/571
CPC分类号： G05F1/573
摘要： A power converter includes a main FET and a diode parallel to the main FET. A voltage divider circuit parallel to the main FET enables current to be sensed by a controller for overcurrent protection. A second diode parallel to one element of the voltage divider circuit and in series with a sense element causes the current through the sense element to increase with temperature as current increases through the first diode. In one implantation, a SenseFET comprises a main FET and a parallel mirror FET. A sense resistive element is in series with the mirror FET. A first Schottky diode is placed parallel to the main FET and a second Schottky diode parallel to the mirror FET and in series with the sense resistive element. The first and second diodes are thermally connected such that sensed current increases with increased current through the first Schottky diode. A controller provides overcurrent protection to the converter in response to the level of current through the sense resistive element.
摘要翻译：电源转换器包括主FET和与主FET并联的二极管。与主FET并联的分压电路使得电流可由控制器感应到过电流保护。平行于分压器电路的一个元件并与感测元件串联的第二二极管使电流通过感测元件随着电流随着第一二极管的电流而增加。在一次注入中，SenseFET包括主FET和并行反射FET。感测电阻元件与反射镜FET串联。第一肖特基二极管平行于主FET和与反射FET并联并与感测电阻元件串联的第二肖特基二极管放置。第一和第二二极管被热连接，使得感测的电流随着通过第一肖特基二极管的电流增加而增加。控制器响应于通过感测电阻元件的电流电平而向转换器提供过电流保护。

9. 发明申请

US20050110559A1 Charge pump with reduced noise 审中-公开
标题翻译：电荷泵噪音降低
公开(公告)号：US20050110559A1
公开(公告)日：2005-05-26
申请号：US10764823
申请日：2004-01-26
申请人： Thomas Farkas , Abram Dancy , Leif La White , Martin Schlecht
发明人： Thomas Farkas , Abram Dancy , Leif La White , Martin Schlecht
IPC分类号： H02M1/00 , H02M3/07 , H02M3/158 , G05F3/02
CPC分类号： H02M3/07 , H02M1/32 , H02M3/1588 , Y02B70/1466
摘要： A charge pump generates gate control voltage in a DC/DC converter. The input voltage to the charge pump may vary. To reduce noise at higher input voltages, a variable resistance is included in the charge pump and that resistance is controlled to vary with the input voltage.
摘要翻译：电荷泵在DC / DC转换器中产生栅极控制电压。到电荷泵的输入电压可以变化。为了降低较高输入电压下的噪声，电荷泵中包含可变电阻，该电阻被控制以随输入电压而变化。

10. 发明授权

US08593015B2 Battery balancing system 有权
标题翻译：电池平衡系统
公开(公告)号：US08593015B2
公开(公告)日：2013-11-26
申请号：US12914006
申请日：2010-10-28
申请人： Peter Gottlieb , C. Michael Hoff , Thomas Farkas
发明人： Peter Gottlieb , C. Michael Hoff , Thomas Farkas
IPC分类号： H02J1/00
CPC分类号： H02J7/34 , H02J1/10 , H02J7/0014 , Y10T307/625 , Y10T307/735
摘要： A battery system comprises a first battery unit; a DC voltage bus; a second battery unit electrically connected to the DC voltage bus; a current-limiting component; and switching circuitry for connecting the first battery unit to the DC voltage bus, where the switching circuitry is configured to electrically connect the first battery unit to the DC voltage bus either directly or through a current-limiting component, depending on an operating parameter of the first battery unit.
摘要翻译：电池系统包括第一电池单元; 直流电压总线; 电连接到所述直流电压总线的第二电池单元; 限流部件; 以及用于将第一电池单元连接到DC电压总线的开关电路，其中开关电路被配置为直接地或通过限流部件将第一电池单元电连接到DC电压总线，这取决于第一个电池单元。

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