公开(公告)号：US20060244395A1

公开(公告)日：2006-11-02

申请号：US11120229

申请日：2005-05-02

申请人： Mark Taipale ,  Venkatesh Chitta ,  Dragan Veskovic

发明人： Mark Taipale ,  Venkatesh Chitta ,  Dragan Veskovic

IPC分类号： H05B41/16

CPC分类号： H05B41/2855

摘要： An electronic ballast for driving a plurality of gas discharge lamps in parallel includes a rectifier to convert an AC mains input voltage to a rectified voltage, a filter circuit to convert the rectified voltage to a substantially DC bus voltage, an inverter to convert the DC bus voltage to a high-frequency AC voltage for driving the lamp, and an output stage for coupling the high-frequency AC voltage to the lamps. The ballast also includes a plurality of balancing transformers coupled to the lamps for balancing the currents in the lamps. When one of the parallel lamps is missing or faulty, a substantially large voltage is produced across one or more of the balancing transformers. This large voltage is detected by a missing-lamp detect circuit that provides a control signal to a ballast control circuit. In response to a detected missing-lamp condition, the control circuit stops the ballast from driving the lamps. Optionally, the ballast control circuit can transmit a message regarding the missing-lamp condition via an external communication link.

摘要翻译： 用于并行驱动多个气体放电灯的电子镇流器包括将AC电源输入电压转换为整流电压的整流器，将整流电压转换为基本上DC总线电压的滤波电路，将DC总线 电压到用于驱动灯的高频AC电压，以及用于将高频AC电压耦合到灯的输出级。 镇流器还包括耦合到灯的多个平衡变压器，用于平衡灯中的电流。 当并联灯之一丢失或故障时，跨越一个或多个平衡变压器产生大的电压。 这种大的电压由向镇流器控制电路提供控制信号的缺失灯检测电路来检测。 响应于检测到的缺失灯状况，控制电路停止镇流器驱动灯。 可选地，镇流器控制电路可以经由外部通信链路发送关于缺少灯状况的消息。

公开(公告)号：US20060244392A1

公开(公告)日：2006-11-02

申请号：US11120230

申请日：2005-05-02

申请人： Mark Taipale ,  Venkatesh Chitta ,  Dragan Veskovic

发明人： Mark Taipale ,  Venkatesh Chitta ,  Dragan Veskovic

IPC分类号： H05B37/00

CPC分类号： H05B41/282 ,  Y02B20/183

摘要： An electronic ballast for driving a gas discharge lamp includes a rectifier to convert an AC mains input voltage to a rectified voltage, a valley-fill circuit for producing a DC bus voltage, an inverter for converting the DC bus voltage to a high-frequency AC voltage for driving the lamp, a control circuit for controlling the inverter, and a flyback cat-ear power supply for supplying current to the inverter when the rectified voltage is less than a predetermined level. The flyback cat-ear power supply also provides power to the control circuit. Preferably, the flyback cat-ear power supply draws current only when the inverter is not drawing current directly from the AC mains, so as to make the input current to the ballast substantially sinusoidal. The result is a ballast having substantially improved power factor and THD. Also, the ballast operates more efficiently because the flyback cat-ear ear power supply supplies excess energy not needed by the ballast control circuitry to the inverter to be used to drive the lamp.

摘要翻译： 用于驱动气体放电灯的电子镇流器包括将AC电源输入电压转换为整流电压的整流器，用于产生DC总线电压的谷底填充电路，用于将DC总线电压转换为高频AC的逆变器 用于驱动灯的电压，用于控制逆变器的控制电路和用于在整流电压小于预定电平时向逆变器提供电流的回扫式猫耳电源。 反激式猫耳电源还为控制电路提供电源。 优选的是，只有当逆变器没有直接从交流电源引出电流时，回扫式猫耳电源才能产生电流，以使输入电流达到镇流器基本正弦。 结果是具有明显改善的功率因数和THD的镇流器。 此外，镇流器更有效地运行，因为回扫式耳塞式电源将镇流器控制电路不需要的多余能量提供给用于驱动灯的逆变器。

公开(公告)号：US20110241561A1

公开(公告)日：2011-10-06

申请号：US12955988

申请日：2010-11-30

申请人： Venkatesh Chitta ,  Mehmet Ozbek ,  Jonathan Robert Quayle ,  Mark S. Taipale ,  Dragan Veskovic

发明人： Venkatesh Chitta ,  Mehmet Ozbek ,  Jonathan Robert Quayle ,  Mark S. Taipale ,  Dragan Veskovic

IPC分类号： H05B41/16

CPC分类号： H05B41/3921 ,  H05B41/3925

摘要： An electronic ballast circuit for driving a gas discharge lamp is operable to control the lamp to avoid flicking and flashing of the intensity of the lamp during low temperature conditions. The ballast circuit includes an inverter circuit for receiving a DC bus voltage and for generating a high-frequency output voltage, a resonant tank circuit for receiving the high-frequency output voltage and generating a sinusoidal voltage for driving said lamp, and a control circuit operatively coupled to the inverter circuit for adjusting an intensity of the lamp between a minimum intensity and a maximum intensity. The control circuit receives a control signal representative of a lamp temperature of the lamp, and increases the minimum intensity of the lamp if the lamp temperature of the lamp drops below a cold temperature threshold. In addition, the ballast circuit may also include a temperature sensing circuit operable to generate the control signal representative of the lamp temperature of the lamp.

摘要翻译： 用于驱动气体放电灯的电子镇流器电路可操作以控制灯以避免在低温条件下灯的强度的闪烁和闪烁。 镇流器电路包括用于接收直流母线电压并用于产生高频输出电压的反相器电路，用于接收高频输出电压并产生用于驱动所述灯的正弦电压的谐振回路电路，以及可操作地控制电路的控制电路 耦合到逆变器电路，用于在最小强度和最大强度之间调节灯的强度。 控制电路接收表示灯的灯温度的控制信号，并且如果灯的灯温降低到低温阈值以下，则增加灯的最小强度。 此外，镇流器电路还可以包括温度检测电路，其可操作以产生表示灯的灯温度的控制信号。

公开(公告)号：US07432661B2

公开(公告)日：2008-10-07

申请号：US11120230

申请日：2005-05-02

申请人： Mark S. Taipale ,  Venkatesh Chitta ,  Dragan Veskovic

发明人： Mark S. Taipale ,  Venkatesh Chitta ,  Dragan Veskovic

IPC分类号： H05B37/02 ,  G05F1/00

CPC分类号： H05B41/282 ,  Y02B20/183

摘要： An electronic ballast for driving a gas discharge lamp includes a rectifier to convert an AC mains input voltage to a rectified voltage, a valley-fill circuit for producing a DC bus voltage, an inverter for converting the DC bus voltage to a high-frequency AC voltage for driving the lamp, a control circuit for controlling the inverter, and a flyback cat-ear power supply for supplying current to the inverter when the rectified voltage is less than a predetermined level. The flyback cat-ear power supply also provides power to the control circuit. Preferably, the flyback cat-ear power supply draws current only when the inverter is not drawing current directly from the AC mains, so as to make the input current to the ballast substantially sinusoidal. The result is a ballast having substantially improved power factor and THD. Also, the ballast operates more efficiently because the flyback cat-ear ear power supply supplies excess energy not needed by the ballast control circuitry to the inverter to be used to drive the lamp.

摘要翻译： 用于驱动气体放电灯的电子镇流器包括将AC电源输入电压转换为整流电压的整流器，用于产生DC总线电压的谷底填充电路，用于将DC总线电压转换为高频AC的逆变器 用于驱动灯的电压，用于控制逆变器的控制电路和用于在整流电压小于预定电平时向逆变器提供电流的回扫式猫耳电源。 反激式猫耳电源还为控制电路提供电源。 优选的是，只有当逆变器没有直接从交流电源引出电流时，回扫式猫耳电源才能产生电流，以使输入电流达到镇流器基本正弦。 结果是具有明显改善的功率因数和THD的镇流器。 此外，镇流器更有效地运行，因为回扫式耳塞式电源将镇流器控制电路不需要的多余能量提供给用于驱动灯的逆变器。

公开(公告)号：US07983012B2

公开(公告)日：2011-07-19

申请号：US12815469

申请日：2010-06-15

申请人： Venkatesh Chitta ,  Elik Dvorkin ,  Dragan Veskovic

发明人： Venkatesh Chitta ,  Elik Dvorkin ,  Dragan Veskovic

IPC分类号： H02H3/08

CPC分类号： H05B37/0254 ,  H04L25/028

摘要： A communication circuit for an electronic dimming ballast provides high-voltage miswire protection and improved rise and fall times of a transmitted digital signal. The electronic dimming ballast comprises a control circuit, which is coupled to a digital communication link, for example, a DALI communication link, via the communication circuit. The communication circuit comprises a receiving circuit for detecting when the digital ballast communication link is shorted and for providing a received digital message to the control circuit. The communication circuit also comprises a transmitting circuit for shorting the communication link in response to the control circuit. The communication circuit also includes a high-voltage fault protection circuit for protecting the circuitry of the communication circuit if the communication circuit high-voltage mains voltages. The communication circuit is operable to reliably transmit digital messages having improved rise and fall times. The communication circuit draws acceptable amounts of current when the communication link is alternatively in idle and active states.

摘要翻译： 用于电子调光镇流器的通信电路提供高电压的不连线保护和改善发射的数字信号的上升和下降时间。 电子调光镇流器包括经由通信电路耦合到数字通信链路（例如，DALI通信链路）的控制电路。 通信电路包括一个接收电路，用于检测数字镇流器通信链路何时被短路，并向接收到的数字消息提供给控制电路。 通信电路还包括用于响应于控制电路使通信链路短路的发送电路。 通信电路还包括用于保护通信电路的电路的高压故障保护电路，如果通信电路是高压电源电压。 通信电路可操作地可靠地发送具有改善的上升和下降时间的数字消息。 当通信链路交替地处于空闲和活动状态时，通信电路吸收可接受的电流量。

公开(公告)号：US07764479B2

公开(公告)日：2010-07-27

申请号：US11787934

申请日：2007-04-18

申请人： Venkatesh Chitta ,  Elik Dvorkin ,  Dragan Veskovic

发明人： Venkatesh Chitta ,  Elik Dvorkin ,  Dragan Veskovic

IPC分类号： H02H3/20

CPC分类号： H05B37/0254 ,  H04L25/028

摘要： A communication circuit for an electronic dimming ballast provides high-voltage miswire protection and improved rise and fall times of a transmitted digital signal. The electronic dimming ballast comprises a control circuit, which is coupled to a digital communication link, for example, a DALI communication link, via the communication circuit. The communication circuit comprises a receiving circuit for detecting when the digital ballast communication link is shorted and for providing a received digital message to the control circuit. The communication circuit also comprises a transmitting circuit for shorting the communication link in response to the control circuit. The communication circuit also includes a high-voltage fault protection circuit for protecting the circuitry of the communication circuit if the communication circuit high-voltage mains voltages. The communication circuit is operable to reliably transmit digital messages having improved rise and fall times. The communication circuit draws acceptable amounts of current when the communication link is alternatively in idle and active states.

摘要翻译： 用于电子调光镇流器的通信电路提供高电压的不连线保护和改善发射的数字信号的上升和下降时间。 电子调光镇流器包括经由通信电路耦合到数字通信链路（例如，DALI通信链路）的控制电路。 通信电路包括一个接收电路，用于检测数字镇流器通信链路何时被短路，并向接收到的数字消息提供给控制电路。 通信电路还包括用于响应于控制电路使通信链路短路的发送电路。 通信电路还包括用于保护通信电路的电路的高压故障保护电路，如果通信电路是高压电源电压。 通信电路可操作地可靠地发送具有改善的上升和下降时间的数字消息。 当通信链路交替地处于空闲和活动状态时，通信电路吸收可接受的电流量。

公开(公告)号：US20100246082A1

公开(公告)日：2010-09-30

申请号：US12815469

申请日：2010-06-15

申请人： Venkatesh Chitta ,  Elik Dvorkin ,  Dragan Veskovic

发明人： Venkatesh Chitta ,  Elik Dvorkin ,  Dragan Veskovic

IPC分类号： H02H3/20

CPC分类号： H05B37/0254 ,  H04L25/028

摘要： A communication circuit for an electronic dimming ballast provides high-voltage miswire protection and improved rise and fall times of a transmitted digital signal. The electronic dimming ballast comprises a control circuit, which is coupled to a digital communication link, for example, a DALI communication link, via the communication circuit. The communication circuit comprises a receiving circuit for detecting when the digital ballast communication link is shorted and for providing a received digital message to the control circuit. The communication circuit also comprises a transmitting circuit for shorting the communication link in response to the control circuit. The communication circuit also includes a high-voltage fault protection circuit for protecting the circuitry of the communication circuit if the communication circuit high-voltage mains voltages. The communication circuit is operable to reliably transmit digital messages having improved rise and fall times. The communication circuit draws acceptable amounts of current when the communication link is alternatively in idle and active states.

摘要翻译： 用于电子调光镇流器的通信电路提供高电压的不连线保护和改善发射的数字信号的上升和下降时间。 电子调光镇流器包括经由通信电路耦合到数字通信链路（例如，DALI通信链路）的控制电路。 通信电路包括一个接收电路，用于检测数字镇流器通信链路何时被短路，并向接收到的数字消息提供给控制电路。 通信电路还包括用于响应于控制电路使通信链路短路的发送电路。 通信电路还包括用于保护通信电路的电路的高压故障保护电路，如果通信电路是高压电源电压。 通信电路可操作地可靠地发送具有改善的上升和下降时间的数字消息。 当通信链路交替地处于空闲和活动状态时，通信电路吸收可接受的电流量。

公开(公告)号：US20080315779A1

公开(公告)日：2008-12-25

申请号：US12168977

申请日：2008-07-08

申请人： Mark S. Taipale ,  Venkatesh Chitta ,  Dragan Veskovic

发明人： Mark S. Taipale ,  Venkatesh Chitta ,  Dragan Veskovic

IPC分类号： H05B41/36

CPC分类号： H05B41/282 ,  Y02B20/183

摘要： An electronic ballast for driving a gas discharge lamp includes a rectifier to convert an AC mains input voltage to a rectified voltage, a valley-fill circuit for producing a DC bus voltage, an inverter for converting the DC bus voltage to a high-frequency AC voltage for driving the lamp, a control circuit for controlling the inverter, and a flyback cat-ear power supply for supplying current to the inverter when the rectified voltage is less than a predetermined level. The flyback cat-ear power supply also provides power to the control circuit. Preferably, the flyback cat-ear power supply draws current only when the inverter is not drawing current directly from the AC mains, so as to make the input current to the ballast substantially sinusoidal. The result is a ballast having substantially improved power factor and THD. Also, the ballast operates more efficiently because the flyback cat-ear ear power supply supplies excess energy not needed by the ballast control circuitry to the inverter to be used to drive the lamp.

摘要翻译： 用于驱动气体放电灯的电子镇流器包括将AC电源输入电压转换为整流电压的整流器，用于产生DC总线电压的谷底填充电路，用于将DC总线电压转换为高频AC的逆变器 用于驱动灯的电压，用于控制逆变器的控制电路和用于在整流电压小于预定电平时向逆变器提供电流的回扫式猫耳电源。 反激式猫耳电源还为控制电路提供电源。 优选的是，只有当逆变器没有直接从交流电源引出电流时，回扫式猫耳电源才能产生电流，以使输入电流达到镇流器基本正弦。 结果是具有明显改善的功率因数和THD的镇流器。 此外，镇流器更有效地运行，因为回扫式耳塞式电源将镇流器控制电路不需要的多余能量提供给用于驱动灯的逆变器。

公开(公告)号：US20080258551A1

公开(公告)日：2008-10-23

申请号：US11787934

申请日：2007-04-18

申请人： Venkatesh Chitta ,  Elik Dvorkin ,  Dragan Veskovic

发明人： Venkatesh Chitta ,  Elik Dvorkin ,  Dragan Veskovic

IPC分类号： H02H3/20 ,  H04B3/54

CPC分类号： H05B37/0254 ,  H04L25/028

摘要： A communication circuit for an electronic dimming ballast provides high-voltage miswire protection and improved rise and fall times of a transmitted digital signal. The electronic dimming ballast comprises a control circuit, which is coupled to a digital communication link, for example, a DALI communication link, via the communication circuit. The communication circuit comprises a receiving circuit for detecting when the digital ballast communication link is shorted and for providing a received digital message to the control circuit. The communication circuit also comprises a transmitting circuit for shorting the communication link in response to the control circuit. The communication circuit also includes a high-voltage fault protection circuit for protecting the circuitry of the communication circuit if the communication circuit high-voltage mains voltages. The communication circuit is operable to reliably transmit digital messages having improved rise and fall times. The communication circuit draws acceptable amounts of current when the communication link is alternatively in idle and active states.

摘要翻译： 用于电子调光镇流器的通信电路提供高电压的不连线保护和改善发射的数字信号的上升和下降时间。 电子调光镇流器包括经由通信电路耦合到数字通信链路（例如，DALI通信链路）的控制电路。 通信电路包括一个接收电路，用于检测数字镇流器通信链路何时被短路，并向接收到的数字消息提供给控制电路。 通信电路还包括用于响应于控制电路使通信链路短路的发送电路。 通信电路还包括用于保护通信电路的电路的高压故障保护电路，如果通信电路是高压电源电压。 通信电路可操作地可靠地发送具有改善的上升和下降时间的数字消息。 当通信链路交替地处于空闲和活动状态时，通信电路吸收可接受的电流量。

公开(公告)号：US08629624B2

公开(公告)日：2014-01-14

申请号：US13212556

申请日：2011-08-18

申请人： Venkatesh Chitta ,  Jonathan Robert Quayle ,  Alexander J. Rovnan ,  Mark S. Taipale ,  Dragan Veskovic

发明人： Venkatesh Chitta ,  Jonathan Robert Quayle ,  Alexander J. Rovnan ,  Mark S. Taipale ,  Dragan Veskovic

IPC分类号： H05B37/02 ,  H05B39/04 ,  H05B41/36 ,  H05B37/00 ,  H05B39/00 ,  H05B41/14 ,  H05B41/16 ,  H05B41/24 ,  H05B41/00

CPC分类号： H05B41/24 ,  H05B37/00 ,  H05B41/295 ,  H05B41/38

摘要： A load control device, such as an electronic ballast, for controlling the power delivered from an AC power source to an electrical load, such as one or more fluorescent lamps, comprises a power converter having an inductor and a power switching device coupled to the inductor, a load control circuit adapted to be coupled to the electrical load, and a control circuit operable to calculate an average input power of the load control device. The control circuit may be operable to calculate a cumulative output power of the power converter while the ballast is preheating filaments of the lamps, and to subsequently determine a fault condition in the lamps in response to the calculated cumulative output power of the power converter. Further, the control circuit may be operable to transmit a digital message including the calculated average input power of the load control device.

摘要翻译： 用于控制从AC电源传递到诸如一个或多个荧光灯的电负载的功率的诸如电子镇流器的负载控制装置包括具有耦合到电感器的电感器和功率开关装置的功率转换器 ，适于耦合到所述电负载的负载控制电路，以及可操作以计算所述负载控制装置的平均输入功率的控制电路。 控制电路可以可操作以在镇流器预热灯的灯丝时计算功率转换器的累积输出功率，并且随后响应于所计算的功率转换器的累积输出功率来确定灯中的故障状况。 此外，控制电路可以用于发送包括计算出的负载控制装置的平均输入功率的数字消息。