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1. 发明申请

US20100171435A1 Thermal Protection For Lamp Ballasts 有权
标题翻译：灯泡镇流器的热保护
公开(公告)号：US20100171435A1
公开(公告)日：2010-07-08
申请号：US12714972
申请日：2010-03-01
申请人： Venkatesh Chitta , Mark S. Taipale , Jonathan Robert Quayle , Thomas R. Hinds
发明人： Venkatesh Chitta , Mark S. Taipale , Jonathan Robert Quayle , Thomas R. Hinds
IPC分类号： H05B37/02
CPC分类号： H05B41/2856 , H05B41/2986
摘要： The output current of a ballast is dynamically limited when an over-temperature condition is detected in the ballast according to one of (i) a step function or (ii) a combination of step and continuous functions, so as to reduce the temperature of the ballast while continuing to operate it.
摘要翻译：当在镇流器中检测到过温条件时，镇流器的输出电流根据（i）阶跃函数或（ii）阶跃函数和连续函数的组合之一被检测，以便降低温度镇流器，同时继续操作它。

2. 发明授权

US07940015B2 Thermal protection for lamp ballasts 有权
标题翻译：灯泡镇流器的热保护
公开(公告)号：US07940015B2
公开(公告)日：2011-05-10
申请号：US12714972
申请日：2010-03-01
申请人： Venkatesh Chitta , Mark S. Taipale , Jonathan Robert Quayle , Thomas R. Hinds
发明人： Venkatesh Chitta , Mark S. Taipale , Jonathan Robert Quayle , Thomas R. Hinds
IPC分类号： G05F1/00
CPC分类号： H05B41/2856 , H05B41/2986
摘要： The output current of a ballast is dynamically limited when an over-temperature condition is detected in the ballast according to one of (i) a step function or (ii) a combination of step and continuous functions, so as to reduce the temperature of the ballast while continuing to operate it.
摘要翻译：当在镇流器中检测到过温条件时，镇流器的输出电流根据（i）阶跃函数或（ii）阶跃函数和连续函数的组合之一被检测，以便降低温度镇流器，同时继续操作它。

3. 发明申请

US20110241561A1 Method of Controlling an Electronic Dimming Ballast During Low Temperature Conditions 审中-公开
标题翻译：在低温条件下控制电子调光镇流器的方法
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。

4. 发明申请

US20120043900A1 Method and Apparatus for Measuring Operating Characteristics in a Load Control Device 有权
标题翻译：用于测量负载控制装置中的工作特性的方法和装置
公开(公告)号：US20120043900A1
公开(公告)日：2012-02-23
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： H05B41/36
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。

5. 发明授权

US08629624B2 Method and apparatus for measuring operating characteristics in a load control device 有权
标题翻译：用于测量负载控制装置中的工作特性的方法和装置
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。

6. 发明申请

US20120043903A1 Method of Measuring a Resonant Frequency in an Electronic Dimming Ballast 有权
标题翻译：电子调光镇流器谐振频率测量方法
公开(公告)号：US20120043903A1
公开(公告)日：2012-02-23
申请号：US12858662
申请日：2010-08-18
申请人： Jonathan Robert Quayle , Venkatesh Chitta
发明人： Jonathan Robert Quayle , Venkatesh Chitta
IPC分类号： H05B41/36 , G01R31/00 , G01R27/28
CPC分类号： H05B41/295 , H05B41/2825 , H05B41/3925 , H05B41/3927
摘要： An electronic ballast for driving a gas discharge lamp comprises an inverter circuit, a resonant tank circuit, and a control circuit operable to determine an approximation of a resonant frequency of the resonant tank circuit and to control the inverter circuit in response to the approximation of the resonant frequency. The control circuit determines the approximation of the resonant frequency by adjusting an operating frequency of a high-frequency inverter output voltage provided to the resonant tank circuit from a frequency above the resonant frequency down towards the resonant frequency, measuring the magnitude of a lamp voltage across the lamp, and storing the present value of the operating frequency as the resonant frequency when the magnitude of the lamp voltage reaches a maximum value. The control circuit may control the operating frequency of the inverter output voltage in response to the approximation of the resonant frequency and a target intensity of the lamp.
摘要翻译：用于驱动气体放电灯的电子镇流器包括逆变器电路，谐振回路和控制电路，其可操作以确定谐振回路的谐振频率的近似值，并且响应于近似的谐振频率。控制电路通过从谐振频率以上的频率向谐振频率调节提供给谐振回路的高频逆变器输出电压的工作频率，来测定谐振频率的近似值，测量灯电压的幅度并且当灯电压的大小达到最大值时将工作频率的当前值作为谐振频率存储。响应于谐振频率和灯的目标强度的近似，控制电路可以控制逆变器输出电压的工作频率。

7. 发明授权

US08384297B2 Method of controlling an operating frequency of an electronic dimming ballast 有权
标题翻译：控制电子调光镇流器工作频率的方法
公开(公告)号：US08384297B2
公开(公告)日：2013-02-26
申请号：US12858662
申请日：2010-08-18
申请人： Jonathan Robert Quayle , Venkatesh Chitta
发明人： Jonathan Robert Quayle , Venkatesh Chitta
IPC分类号： H05B41/36
CPC分类号： H05B41/295 , H05B41/2825 , H05B41/3925 , H05B41/3927
摘要： An electronic ballast for driving a gas discharge lamp comprises an inverter circuit, a resonant tank circuit, and a control circuit operable to determine an approximation of a resonant frequency of the resonant tank circuit and to control the inverter circuit in response to the approximation of the resonant frequency. The control circuit determines the approximation of the resonant frequency by adjusting an operating frequency of a high-frequency inverter output voltage provided to the resonant tank circuit from a frequency above the resonant frequency down towards the resonant frequency, measuring the magnitude of a lamp voltage across the lamp, and storing the present value of the operating frequency as the resonant frequency when the magnitude of the lamp voltage reaches a maximum value. The control circuit may control the operating frequency of the inverter output voltage in response to the approximation of the resonant frequency and a target intensity of the lamp.
摘要翻译：用于驱动气体放电灯的电子镇流器包括逆变器电路，谐振回路和控制电路，其可操作以确定谐振回路的谐振频率的近似值，并且响应于近似的谐振频率。控制电路通过从谐振频率以上的频率向谐振频率调节提供给谐振回路的高频逆变器输出电压的工作频率，来测定谐振频率的近似值，测量灯电压的幅度并且当灯电压的大小达到最大值时将工作频率的当前值作为谐振频率存储。响应于谐振频率和灯的目标强度的近似，控制电路可以控制逆变器输出电压的工作频率。

8. 发明申请

US20090033248A1 Thermal Foldback For A Lamp Control Device 有权
标题翻译：灯控制装置的热折返
公开(公告)号：US20090033248A1
公开(公告)日：2009-02-05
申请号：US12242541
申请日：2008-09-30
申请人： David E. Cottongim , Jecko Arakkal , Venkatesh Chitta , Mark S. Taipale
发明人： David E. Cottongim , Jecko Arakkal , Venkatesh Chitta , Mark S. Taipale
IPC分类号： H05B41/36
CPC分类号： H05B41/3925 , H05B41/2856 , H05B41/2986
摘要： The output current of a ballast is dynamically limited when an over-temperature condition is detected in the ballast according to one of (i) a step function or (ii) a combination of step and continuous functions, so as to reduce the temperature of the ballast while continuing to operate it.
摘要翻译：当在镇流器中检测到过温条件时，镇流器的输出电流根据（i）阶跃函数或（ii）阶跃函数和连续函数的组合之一被检测，以便降低温度镇流器，同时继续操作它。

9. 发明申请

US20080315779A1 Electronic Ballast Having A Flyback Cat-Ear Power Supply 有权
标题翻译：具有反激猫耳电源的电子镇流器
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。

10. 发明授权

US08466628B2 Closed-loop load control circuit having a wide output range 有权
标题翻译：具有宽输出范围的闭环负载控制电路
公开(公告)号：US08466628B2
公开(公告)日：2013-06-18
申请号：US12814026
申请日：2010-06-11
申请人： Thomas M. Shearer , Matthew W. Nuhfer , Venkatesh Chitta , Kartik Iyer , Nicholas A. Hoerter , Mark S. Taipale
发明人： Thomas M. Shearer , Matthew W. Nuhfer , Venkatesh Chitta , Kartik Iyer , Nicholas A. Hoerter , Mark S. Taipale
IPC分类号： H05B33/08 , H05B37/02
CPC分类号： H05B33/0845 , H05B33/0815 , H05B33/0824 , H05B33/0851 , H05B37/029 , Y02B20/346
摘要： A load control circuit, such as a light-emitting diode (LED) driver, for controlling the amount of power delivered to an electrical load, such as an LED light source, comprises a regulation transistor adapted to be coupled in series with the load, and a feedback circuit coupled in series with the regulation transistor, whereby the load control circuit is able to control the magnitude of a load current conducted through the load from a minimum load current to a maximum load current, which is at least approximately one thousand times larger than the minimum load current. The feedback circuit generates at least one load current feedback signal representative of the magnitude of the load current. The regulation transistor operates in the linear region to control the magnitude of the load current conducted through the load in response to the magnitude of the load current determined from the load current feedback signal.
摘要翻译：用于控制传递到诸如LED光源的电负载的功率量的诸如发光二极管（LED）驱动器的负载控制电路包括适于与负载串联耦合的调节晶体管，以及与调节晶体管串联耦合的反馈电路，由此负载控制电路能够将从负载传导的负载电流的大小从最小负载电流控制到最大负载电流，该最大负载电流为至少约一千倍大于最小负载电流。反馈电路产生代表负载电流大小的至少一个负载电流反馈信号。调节晶体管在线性区域中操作以响应于从负载电流反馈信号确定的负载电流的大小来控制通过负载传导的负载电流的大小。

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