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1. 发明授权

US5998930A Electronic ballast with two-step boost converter and method 失效
标题翻译：电子镇流器采用两级升压转换器和方法
公开(公告)号：US5998930A
公开(公告)日：1999-12-07
申请号：US738945
申请日：1996-10-24
申请人： Anand K. Upadhyay , Bhadresh Mehta , John G. Konopka
发明人： Anand K. Upadhyay , Bhadresh Mehta , John G. Konopka
IPC分类号： H05B41/282 , H05B41/295 , H05B37/02
CPC分类号： H05B41/2827 , H05B41/295 , Y02B20/188 , Y10S315/07
摘要： An electronic ballast (10) for fluorescent lamps includes a rectifier circuit (100), a boost converter (200), and an inverter (500). The boost converter (200) includes a boost control circuit (400) and a shifting circuit (300). The shifting circuit (300) provides filament preheating by maintaining the boost output voltage at a first level for a predetermined delay period following startup of the boost converter, and then increasing the boost voltage to a second level upon completion of the delay period in order to ignite and operate the lamps. In a preferred embodiment, shifting circuit (300) comprises a shunt circuit (320) and a time delay circuit (360), and inverter (400) is a series resonant half-bridge inverter.
摘要翻译：用于荧光灯的电子镇流器（10）包括整流电路（100），升压转换器（200）和逆变器（500）。升压转换器（200）包括升压控制电路（400）和移位电路（300）。移位电路（300）通过在升压转换器启动之后的预定延迟时间内将升压输出电压保持在第一电平，并且在延迟周期完成时将升压电压升高到第二电平来提供灯丝预热，以便点燃并操作灯具。在优选实施例中，移位电路（300）包括分流电路（320）和延时电路（360），逆变器（400）是串联谐振半桥逆变器。

2. 发明授权

US5834924A In-rush current reduction circuit for boost converters and electronic ballasts 失效
标题翻译：升压转换器和电子镇流器的浪涌电流降低电路
公开(公告)号：US5834924A
公开(公告)日：1998-11-10
申请号：US811862
申请日：1997-03-05
申请人： John G. Konopka , Kenneth D. Labudda , Dennis L. Stephens , Anand K. Upadhyay
发明人： John G. Konopka , Kenneth D. Labudda , Dennis L. Stephens , Anand K. Upadhyay
IPC分类号： H02H9/00 , H02M7/06 , H05B41/285 , G05F1/56
CPC分类号： H02M7/062 , H02H9/001 , H05B41/2856 , Y10S323/908
摘要： An electronic power supply circuit (50) that includes a rectifying circuit (14), a boost converter (16), an in-rush current reduction circuit (52), and a bulk capacitor (18). The in-rush current reduction circuit (52) includes an in-rush current limiting resistor (54) and a bypass capacitor (56) that are connected in parallel with each other. An improved version of the in-rush current reduction circuit (52) includes a bypass diode (58) connected in parallel with the in-rush current limiting resistor (54) and bypass capacitor (56) which is oriented to provide a path for current flowing out of bulk capacitor (18). One particular application of the disclosed circuit is for use in an electronic ballast for fluorescent lamps.
摘要翻译：一种包括整流电路（14），升压转换器（16），浪涌电流降低电路（52）和大容量电容器（18）的电子电源电路（50）。浪涌电流降低电路（52）包括彼此并联连接的浪涌限流电阻（54）和旁路电容（56）。浪涌电流降低电路（52）的改进型式包括与浪涌限流电阻（54）并联连接的旁路二极管（58）和旁路电容器（56），其被定向以提供电流路径流出大容量电容器（18）。所公开的电路的一个具体应用是用于荧光灯的电子镇流器。

3. 发明授权

US5313176A Integrated common mode and differential mode inductor device 失效
标题翻译：集成共模和差模电感器件
公开(公告)号：US5313176A
公开(公告)日：1994-05-17
申请号：US968759
申请日：1992-10-30
申请人： Anand K. Upadhyay
发明人： Anand K. Upadhyay
IPC分类号： H01F27/00 , G11C11/14 , G11C11/22 , G11C11/56 , H01F10/32 , H03H1/00 , H03H7/09 , H01F17/04
CPC分类号： H01F10/32 , B82Y25/00 , G11C11/14 , G11C11/22 , G11C11/5607 , G11C11/565 , H03H1/0007
摘要： An integrated EMI/RFI Filter Magnetic has differential and common mode inductors wound about an I-Core. The I-Core is juxtaposed with an E-Core, with the end surfaces of the E-Core legs facing the I-Core. The magnetic has a substantially closed magnetic path for the differential inductors and the common mode inductors.
摘要翻译：集成的EMI / RFI滤波磁芯具有围绕I-Core缠绕的差分和共模电感器。 I-Core与E-Core并置，E-Core脚的端面面向I-Core。磁体具有用于差分电感器和共模电感器的基本闭合的磁路。

4. 发明授权

US4717994A Current mode control for DC converters operating over 50% duty cycle 失效
标题翻译： DC转换器工作电流模式控制占空比的50％以上
公开(公告)号：US4717994A
公开(公告)日：1988-01-05
申请号：US940699
申请日：1986-12-11
申请人： Bonifacio Diaz , Anand K. Upadhyay
发明人： Bonifacio Diaz , Anand K. Upadhyay
IPC分类号： H02M3/337
CPC分类号： H02M3/3376
摘要： In a capacitively coupled DC-to-DC converter employing a pair of switching elements alternately rendered conductive, instabilities arising from current mode control are compensated for by detecting and controlling the amount of charge transferred by each switching element to a respective output capacitor associated therewith rather than the conduction period of each switching element. Converter instabilities arising from switching element duty cycles in excess of 50% are compensated for by integrating the sensed inductor current which represents the average inductor output current rather than its instantaneous value. An integrating network is discharged to 0 at the end of each cycle in resetting the sensed inductor current to 0 to prevent converter runaway when the switching element duty cycle exceeds 50%. This invention is applicable for all types of DC converters operating with a duty cycle greater than 50%.
摘要翻译：在采用交替导通的一对开关元件的电容耦合DC-DC转换器中，通过检测和控制由每个开关元件传送到相应的输出电容器的电荷量而补偿由电流模式控制产生的不稳定性，比每个开关元件的导通时间长。由开关元件占空比超过50％引起的转换器不稳定性通过对感应电感电流进行积分来进行补偿，该电感电流代表平均电感输出电流而不是其瞬时值。在每个周期结束时将积分网络放电到0，将感应电感电流重置为0，以防止开关元件占空比超过50％时转换器失控。本发明适用于以占空比大于50％工作的所有类型的DC转换器。

5. 发明授权

US5969483A Inverter control method for electronic ballasts 失效
标题翻译：电子镇流器的变频器控制方法
公开(公告)号：US5969483A
公开(公告)日：1999-10-19
申请号：US50837
申请日：1998-03-30
申请人： Edward Li , Guang Liu , Anand K. Upadhyay , Dennis L. Stephens
发明人： Edward Li , Guang Liu , Anand K. Upadhyay , Dennis L. Stephens
IPC分类号： H05B41/298 , H05B41/14
CPC分类号： H05B41/2985
摘要： A method (100) of controlling an inverter in an electronic ballast for at least one gas discharge lamp protects the inverter from damage due to lamp fault conditions, and provides enhanced noise immunity and multiple ignition attempts for low-temperature lamp starting. The method (100) includes repeating a filament preheating step and a frequency shifting step up to a predetermined number of times in order to facilitate lamp ignition under low-temperature conditions and to verify the legitimacy of a detected lamp fault.
摘要翻译：控制至少一个气体放电灯的电子镇流器中的逆变器的方法（100）保护逆变器免受灯故障条件的损害，并为低温灯启动提供增强的抗噪声和多点火尝试。方法（100）包括重复灯丝预热步骤和频移步骤直到预定次数，以便于在低温条件下点灯，并且验证检测到的灯故障的合法性。

6. 发明授权

US5945788A Electronic ballast with inverter control circuit 失效
标题翻译：电子镇流器带逆变器控制电路
公开(公告)号：US5945788A
公开(公告)日：1999-08-31
申请号：US50829
申请日：1998-03-30
申请人： Edward Li , Guang Liu , Anand K. Upadhyay , Dennis L. Stephens
发明人： Edward Li , Guang Liu , Anand K. Upadhyay , Dennis L. Stephens
IPC分类号： H05B41/298 , G05F1/00
CPC分类号： H05B41/2981 , Y10S315/05 , Y10S315/07
摘要： An electronic ballast (300) for powering at least one gas discharge lamp (10) includes an inverter (400), an output circuit (700), a lamp fault detection circuit (800), and an inverter control circuit (500). Ballast (300) operates according to an inverter control method (100) that includes repeating a filament preheating step and a frequency shifting step up to a predetermined number of times in order to facilitate lamp ignition under low-temperature conditions and to verify the legitimacy of a lamp fault. Inverter control circuit (500) is well-suited for implementation as a custom integrated circuit. Ballast (300) optionally includes an overcurrent detection circuit (820') with an adjustable lamp fault detection threshold that provides decreased sensitivity during lamp starting and enhanced protection after lamp ignition.
摘要翻译：用于对至少一个气体放电灯（10）供电的电子镇流器（300）包括逆变器（400），输出电路（700），灯故障检测电路（800）和逆变器控制电路（500）。镇流器（300）根据逆变器控制方法（100）进行工作，该方法包括重复灯丝预热步骤和频率移动步骤直到预定次数，以便于在低温条件下点灯，并验证其是否合法灯故障。逆变器控制电路（500）非常适合作为定制集成电路实现。镇流器（300）可选地包括具有可调节的灯故障检测阈值的过电流检测电路（820'），其在灯启动期间提供降低的灵敏度，并且在灯点火之后增强保护。

7. 发明授权

US4992919A Parallel resonant converter with zero voltage switching 失效
标题翻译：具有零电压开关的并联谐振变换器
公开(公告)号：US4992919A
公开(公告)日：1991-02-12
申请号：US458993
申请日：1989-12-29
申请人： Chu-Quon Lee , Kasemsan Siri , Anand K. Upadhyay
发明人： Chu-Quon Lee , Kasemsan Siri , Anand K. Upadhyay
IPC分类号： H02M3/337
CPC分类号： H02M3/3376 , Y02B70/1433
摘要： A parallel resonant converter as disclosed having in one embodiment a variable inductance and having a control circuit which operates the switches of the converter under zero voltage switching conditions and under continuous conduction mode by maintaining the quality factor of the resonant circuit generally equal to the DC conversion ratio.
摘要翻译：如在一个实施例中所公开的一种并联谐振变换器，其具有可变电感并且具有控制电路，该控制电路在零电压开关条件下和在连续导通模式下操作转换器的开关，通过将谐振电路的品质因数通常维持在等于DC转换比。

8. 发明授权

US5729096A Inverter protection method and protection circuit for fluorescent lamp preheat ballasts 失效
标题翻译：荧光灯预热镇流器的逆变器保护方法和保护电路
公开(公告)号：US5729096A
公开(公告)日：1998-03-17
申请号：US686639
申请日：1996-07-24
申请人： Guang Liu , Anand K. Upadhyay
发明人： Guang Liu , Anand K. Upadhyay
IPC分类号： H05B41/298 , H05B37/02
CPC分类号： H05B41/2985 , Y10S315/07
摘要： A protection method (10) and protection circuit (500) for protecting an inverter (300) in an electronic preheat ballast (100) for powering at least one fluorescent lamp (902). The inverter (300) includes a first inverter switch (306), a second inverter switch (310), an output circuit (800), and an inverter driver circuit (400) having a drive frequency. The protection circuit (500) comprises a frequency shift circuit (600), a latch circuit (700), a current source network (520), a current sensing circuit (510), and a DC supply capacitance (502). The protection method (10) includes the steps of (a) providing a filament preheat period by initially setting the drive frequency at a first frequency, (b) shifting the drive frequency to a second frequency for igniting and operating the lamps, (c) changing the drive frequency back to the first frequency in response to a lamp fault, and (d) providing, upon correction of the lamp fault, a filament preheat period prior to attempting to ignite and operate the lamps.
摘要翻译：一种保护方法（10）和保护电路（500），用于保护用于为至少一个荧光灯（902）供电的电子预热镇流器（100）中的逆变器（300）。逆变器（300）包括第一逆变器开关（306），第二逆变器开关（310），输出电路（800）和具有驱动频率的逆变器驱动电路（400）。保护电路（500）包括频移电路（600），锁存电路（700），电流源网络（520），电流检测电路（510）和直流电源电容（502）。保护方法（10）包括以下步骤：（a）通过将驱动频率初始设定为第一频率来提供灯丝预热周期，（b）将驱动频率转换到用于点燃和操作灯的第二频率，（c）响应于灯故障将驱动频率改变回第一频率，以及（d）在灯故障校正之前，在试图点燃和操作灯之前提供灯丝预热时段。

9. 发明授权

US5315280A Bobbin for electrical windings 失效
标题翻译：绕组线圈
公开(公告)号：US5315280A
公开(公告)日：1994-05-24
申请号：US719224
申请日：1991-06-21
申请人： Rembert R. Stokes , Anand K. Upadhyay
发明人： Rembert R. Stokes , Anand K. Upadhyay
IPC分类号： H01F5/02 , H01F15/10
CPC分类号： H01F5/02
摘要： A transformer (202) has a bobbin (2) which has an inner portion (104) supporting an inner electrical winding (140) and having a magnetic core recess. The inner portion is located within an outer portion (4) supporting an outer electrical winding (40). The inner portion further has an end with a termination connected to the inner winding, an annular recess (126) in which the inner winding is situated, and a channel (132) communicating between the termination end of the inner portion and a remote end of the annular recess. The channel is positioned radially inwardly of the first annular recess and accommodates a portion of the inner winding. By providing the channel radially inwardly of the annular recess, winding wire can extend between the termination end of the inner portion and the remote end of the annular recess across the annular recess without significantly increasing the size of the inner portion and without increasing the gap between the inner and outer portions. This allows the size, weight and cost of a transformer built with the bobbin to be reduced, and improves the transformer's magnetic performance. The channel also allows layered windings terminating at the same end of the inner portion to be formed from an odd number of winding passes, reducing corona voltage breakdown effect and so prolonging the practical life of the windings. This also allows the inner portion to be wound uninterruptedly by machine without manual intervention.
摘要翻译：变压器（202）具有线轴（2），该线轴具有支撑内部电线圈（140）并具有磁芯凹槽的内部部分（104）。内部部分位于支撑外部电线圈（40）的外部部分（4）内。内部部分还具有端部，端部连接到内部绕组，内部绕组位于其中的环形凹部（126），以及在内部部分的终止端和远端环形凹槽。通道位于第一环形凹部的径向内侧并且容纳内部线圈的一部分。通过在环形凹部径向向内设置通道，绕组线可以在环形凹部的内部部分的终止端和环形凹部的远端之间延伸，而不会显着增加内部部分的尺寸，内部和外部。这样可以减小用筒管构建的变压器的尺寸，重量和成本，并提高变压器的磁性能。通道还允许从内部部分的同一端终止的分层绕组由奇数个绕组通道形成，从而降低电晕电压击穿效应，从而延长绕组的使用寿命。这也允许内部部分被机器不间断地卷绕而不需要人工干预。

10. 发明授权

US4616142A Method of operating parallel-connected semiconductor switch elements 失效
标题翻译：操作并联的半导体开关元件的方法
公开(公告)号：US4616142A
公开(公告)日：1986-10-07
申请号：US687803
申请日：1984-12-31
申请人： Anand K. Upadhyay , W. William Wold , Pierre Thollot
发明人： Anand K. Upadhyay , W. William Wold , Pierre Thollot
IPC分类号： G05F1/10 , G05F1/56 , H02M3/155 , H03K17/12 , H03K17/60 , H03K17/56 , H03K3/01
CPC分类号： H03K17/12
摘要： In power circuit designs, it is sometimes necessary to connect two or more semiconductor power switches in parallel and to simultaneously operate both so that current levels in excess of the rated current handling capability of one of the devices can be conducted. Such operation, however, encounters the problem of current sharing which results from variations in the characteristics of the parallel-connected devices. The method of the present invention obviates the difficulties encountered with current sharing by operating N parallel-connected semiconductor devices one at a time in sequential fashion so that each device conducts an average current equal to the desired average output current divided by N.
摘要翻译：在电力电路设计中，有时需要并联连接两个或更多个半导体功率开关并且同时操作两者，使得可以进行超过一个器件的额定电流处理能力的电流水平。然而，这样的操作遇到由并联设备的特性的变化导致的电流共享的问题。本发明的方法通过以顺序方式一次一个地操作N个并联连接的半导体器件来消除电流共享所遇到的困难，使得每个器件传导等于除以N的期望平均输出电流的平均电流。

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