公开(公告)号：US08467200B2

公开(公告)日：2013-06-18

申请号：US13094260

申请日：2011-04-26

申请人： Shangzhi Pan ,  Sayed Ali Khajehoddin ,  Praveen K. Jain ,  Alireza Bakhshai

发明人： Shangzhi Pan ,  Sayed Ali Khajehoddin ,  Praveen K. Jain ,  Alireza Bakhshai

IPC分类号： H02M1/12

CPC分类号： H02M7/4807 ,  H02J3/383 ,  H02M3/337 ,  Y02B70/1433 ,  Y02E10/563

摘要： Provided are methods, circuits, and systems for obtaining power from a power generator such as a photovoltaic cell or a fuel cell. The methods, circuits, and systems comprise converting substantially DC output power from the power generator into a high frequency AC voltage while rejecting or minimizing oscillations in the output power from the power generator; converting the high frequency AC voltage into a high frequency substantially sinusoidal voltage or current; and converting the high frequency substantially sinusoidal AC voltage or current into (i) a DC voltage or current, and (ii) a low frequency substantially sinusoidal AC voltage or current; wherein the high frequency substantially sinusoidal AC voltage or current is isolated from the DC voltage or current or the low frequency substantially sinusoidal AC voltage or current.

摘要翻译： 提供了用于从诸如光伏电池或燃料电池的发电机获得电力的方法，电路和系统。 方法，电路和系统包括将来自发电机的基本上DC输出功率转换成高频AC电压，同时抑制或最小化来自发电机的输出功率的振荡; 将高频交流电压转换成高频大致正弦电压或电流; 并将高频大体正弦交流电压或电流转换为（i）直流电压或电流，以及（ii）低频大致正弦交流电压或电流; 其中所述高频大体上正弦的AC电压或电流与所述直流电压或电流或所述低频大体正弦交流电压或电流隔离。

公开(公告)号：US5438497A

公开(公告)日：1995-08-01

申请号：US59973

申请日：1993-05-13

申请人： Praveen K. Jain

发明人： Praveen K. Jain

IPC分类号： H02M3/337 ,  H02M3/335

CPC分类号： H02M3/337 ,  H02M2001/0064 ,  Y02B70/1433

摘要： Resonant DC/DC converters are disclosed. The DC/DC converters according to the present invention include a bridged inverter, a resonant circuit, a high frequency transformer and a rectifying circuit. The high frequency transformer has a tertiary winding. The resonant circuit consists of a series resonant branch connected to the transformer primary winding and a parallel resonant branch connected across the tertiary winding. The converters require less capacitive components and lend themselves well to miniaturization.

摘要翻译： 公开了谐振DC / DC转换器。 根据本发明的DC / DC转换器包括桥式逆变器，谐振电路，高频变压器和整流电路。 高频变压器有三级绕组。 谐振电路由连接到变压器初级绕组的串联谐振分支和跨三次绕组连接的并联谐振分支组成。 这些转换器需要较少的电容元件，并适合小型化。

公开(公告)号：US09338843B2

公开(公告)日：2016-05-10

申请号：US14219692

申请日：2014-03-19

申请人： Praveen K. Jain ,  John Lam

发明人： Praveen K. Jain ,  John Lam

IPC分类号： H05B33/08 ,  H02M1/42 ,  H05B41/282

CPC分类号： H05B33/0815 ,  H02M1/4258 ,  H05B41/282

摘要： A driver circuit for use with LED lamps. The driver circuit uses a rectifier, a power factor correction subcircuit, a voltage conversion subcircuit, and a semiconductor switch. The power factor correction subcircuit uses a film capacitor instead of an electrolytic capacitor. As well, the power factor correction subcircuit uses either an inductor or a transformer to shape the incoming current to a substantially sinusoidal waveform that is in phase with the input AC current. The semiconductor switch provides a high frequency pulsating triangular current at the output of the rectifier.

摘要翻译： 用于LED灯的驱动电路。 驱动器电路使用整流器，功率因数校正子电路，电压转换子电路和半导体开关。 功率因数校正子电路使用薄膜电容器而不是电解电容器。 同样，功率因数校正子电路使用电感器或变压器将输入电流整形为与输入AC电流同相的基本正弦波形。 半导体开关在整流器的输出端提供高频脉动三角形电流。

公开(公告)号：US20140063872A1

公开(公告)日：2014-03-06

申请号：US14112708

申请日：2012-04-19

申请人： Djilali Hamza ,  Praveen K. Jain

发明人： Djilali Hamza ,  Praveen K. Jain

IPC分类号： H02M1/44

CPC分类号： H02M1/44 ,  H02M1/12

摘要： The invention provides a digital active EMI filter that removes, minimizes, or reduces unwanted interference (i.e., EMI noise) generated by a power circuit such as, for example, a power converter. Digital active filtering includes digital sampling of the incident noise signal amplitude and frequency, discrete time conversion of the EMI noise source, processing (e.g., inverting) the digital signal, and then constructing an analog output signal (i.e., an EMI compensation signal) which is injected to the input of the power circuit. A digital EMI filter as described herein may be used in both differential-mode and common-mode configurations, and overcomes limitations of passive and active analog EMI filters.

摘要翻译： 本发明提供一种数字有源EMI滤波器，其去除，最小化或减少由例如功率转换器的电力电路产生的不需要的干扰（即，EMI噪声）。 数字有源滤波包括入射噪声信号幅度和频率的数字采样，EMI噪声源的离散时间转换，数字信号的处理（例如，反相），然后构建模拟输出信号（即EMI补偿信号），其中 被注入到电源电路的输入端。 这里描述的数字EMI滤波器可以用于差模和共模配置，并克服无源和有源模拟EMI滤波器的限制。

公开(公告)号：US20110205761A1

公开(公告)日：2011-08-25

申请号：US13030737

申请日：2011-02-18

申请人： Darryl J. Tschirhart ,  Praveen K. Jain

发明人： Darryl J. Tschirhart ,  Praveen K. Jain

IPC分类号： H02M3/335

CPC分类号： H02M3/3376 ,  H02M3/33592 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1475 ,  Y02B70/1491

摘要： This invention relates to circuits and methods for controlling a resonant power converter. Control of the power converter may comprise comparing an output voltage or current of the converter to at least one reference voltage or current; enabling primary side switching signals based on a first selected result of the comparison; and disabling primary side switching signals based on a second selected result of the comparison; wherein a primary side switching signal for each primary side switch includes at least one off-on-off transition.

摘要翻译： 本发明涉及用于控制谐振功率转换器的电路和方法。 功率转换器的控制可以包括将转换器的输出电压或电流与至少一个参考电压或电流进行比较; 基于所述比较的第一选择结果来实现初级侧切换信号; 以及基于所述比较的第二选择结果禁用所述初级侧切换信号; 其中，用于每个初级侧开关的初级侧切换信号包括至少一个关断过渡。

公开(公告)号：US07777461B2

公开(公告)日：2010-08-17

申请号：US11969655

申请日：2008-01-04

申请人： Gary D. Martin ,  Praveen K. Jain

发明人： Gary D. Martin ,  Praveen K. Jain

IPC分类号： G05F1/59

CPC分类号： H02M3/1584 ,  H02M2003/1566

摘要： A power supply system includes multiple power converter phases. A controller (e.g., a processor device, ASIC) monitors an output voltage generated by a combination of multiple power converter phases that supply power to a load. Based on the monitoring, the controller determines: i) a magnitude of an error signal representing a relative difference between the output voltage and a predetermined setpoint value, and ii) a rate-of-change associated with the output voltage. The controller compares the rate-of-change to threshold criteria. In response to detecting that the rate-of-change associated with the output voltage exceeds a threshold value, the controller adjusts a time of turning on of a phase switch (e.g., a power switch configured to convey an input voltage to an inductor that in turn delivers energy to the load) in one or more of the multiple power converter phases depending on the magnitude of the error signal.

摘要翻译： 电源系统包括多个电源转换器阶段。 控制器（例如，处理器设备，ASIC）监视由向负载供电的多个功率转换器相位的组合产生的输出电压。 基于监视，控制器确定：i）表示输出电压和预定设定值之间的相对差的误差信号的大小，以及ii）与输出电压相关联的变化率。 控制器将变化率与阈值进行比较。 响应于检测到与输出电压相关联的变化率超过阈值，控制器调节相位开关的接通时间（例如，被配置为将输入电压传送到电感器的电源开关的时间） 根据误差信号的大小，在多个功率转换器相中的一个或多个中将负载转换为负载）。

公开(公告)号：US07728568B1

公开(公告)日：2010-06-01

申请号：US11644280

申请日：2006-12-22

申请人： Praveen K. Jain

发明人： Praveen K. Jain

IPC分类号： G05F1/59

CPC分类号： H02M1/15 ,  H02M3/157 ,  H02M3/1588 ,  H02M2003/1586 ,  Y02B70/1466

摘要： A power supply system includes a first driver circuit to control a corresponding switching of a first switch device and a second switch device in the power supply system via different drive circuits. To reduce losses and thus improve efficiency of the power supply system, a first driver circuit can be configured to initiate a faster rate of transitioning the first switch device between ON and OFF states than a second driver initiates transitioning of the second switch device between ON and OFF states. To reduce the effects of introducing unwanted ripple voltage on an output signal used to drive a dynamic load, a controller in the power supply system can be configured to initiate shedding or adding of multiple voltage converter phases at the same time when load requirements cross a threshold value.

摘要翻译： 电源系统包括第一驱动器电路，用于经由不同的驱动电路来控制电源系统中的第一开关装置和第二开关装置的对应的切换。 为了降低损耗并因此提高电源系统的效率，第一驱动器电路可被配置为启动在ON和OFF状态之间转换第一开关装置的更快速率，而不是第二驱动器在第二开关装置在ON和ON之间启动转换 OFF状态。 为了减少在用于驱动动态负载的输出信号上引入不想要的纹波电压的影响，电源系统中的控制器可以被配置为在负载要求跨越阈值的同时启动多个电压转换器相位的脱落或相加 值。

公开(公告)号：US06344986B1

公开(公告)日：2002-02-05

申请号：US09595425

申请日：2000-06-15

申请人： Praveen K. Jain ,  Yan-Fei Liu

发明人： Praveen K. Jain ,  Yan-Fei Liu

IPC分类号： H02M542

CPC分类号： H02M1/4225 ,  H02M3/335 ,  Y02B70/126

摘要： In a power factor corrected AC-to-DC power supply system, a DC-to-DC power converter is coupled to the output of an AC-to-DC power converter in order to produce a regulated DC output signal from a rectified AC input signal. The AC-to-DC power converter and the DC-to-DC power converter each includes a switch for controlling the operation of their respective power converter. The AC-to-DC converter includes an inductor. The system provides power factor correction for minimizing harmonic distortion by including a controller that receives the regulated DC output voltage as a feedback signal, and in response, produces a series of drive pulses having predetermined constant duty cycle. These pulses are simultaneously fed to each switch, to operate the respective converters alternately between ON and OFF states. When the AC-to-DC converter is driven by a fixed duty cycle of the series of pulses, power factor correction is improved since the current flowing through the inductor is substantially proportional to the waveform of the rectified AC input signal. By preselecting the value of the inductor, the AC-to-DC converter is operable in a discontinuous mode when the instantaneous rectified AC input signal is low and in a continuous mode when the instantaneous rectified AC input signal is high.

摘要翻译： 在功率因数校正的AC至DC电源系统中，DC-DC电力转换器耦合到AC-DC电力转换器的输出端，以便从整流的AC输入端产生稳定的DC输出信号 信号。 AC-DC电力转换器和DC-DC电力转换器各自包括用于控制其各自功率转换器的操作的开关。 AC-DC转换器包括电感器。 该系统通过包括接收调节的DC输出电压作为反馈信号的控制器来提供用于最小化谐波失真的功率因数校正，并且作为响应，产生具有预定的恒定占空比的一系列驱动脉冲。 这些脉冲同时馈送到每个开关，以在各自的开关状态之间交替地操作相应的转换器。 当由一系列脉冲的固定占空比驱动AC到DC转换器时，功率因数校正被改善，因为流过电感器的电流基本上与整流的AC输入信号的波形成正比。 通过预选电感器的值，当瞬时整流的AC输入信号为低电平时，AC瞬间整流的AC输入信号为高电平时，AC-DC转换器可在不连续模式下工作。

公开(公告)号：US6005782A

公开(公告)日：1999-12-21

申请号：US173034

申请日：1998-10-16

申请人： Praveen K. Jain ,  Yan-Fei Liu ,  Youhao Xi

发明人： Praveen K. Jain ,  Yan-Fei Liu ,  Youhao Xi

IPC分类号： H02M1/34 ,  H02M3/335 ,  H02M1/12 ,  G05F1/10 ,  H02M3/24

CPC分类号： H02M1/34 ,  H02M3/33569 ,  H02M2001/342 ,  Y02B70/1433 ,  Y02B70/1491

摘要： A flyback converter has a main switch coupling a primary winding of a transformer between supply terminals, a duty cycle of the main switch controlling an output of the converter derived from a secondary winding of the transformer. Soft (zero voltage) switching of the main switch is facilitated by a snubber capacitor in parallel with the main switch. An auxiliary circuit coupled in parallel with the snubber capacitor and main switch includes a series-connected auxiliary switch, capacitor, and inductor coupled via another inductor to a full wave rectifier arrangement for recovering energy from the snubber capacitor. Resonant circuits provided by the auxiliary circuit facilitate soft switching of the auxiliary switch for low power loss and high frequency operation. The switches can be MOSFETs with reverse-poled diodes in parallel with their drain-source paths.

摘要翻译： 反激式转换器具有主开关，其在电源端子之间耦合变压器的初级绕组，主开关的占空比控制从变压器的次级绕组获得的转换器的输出。 主开关的软（零电压）开关由与主开关并联的缓冲电容器促成。 与缓冲电容器和主开关并联耦合的辅助电路包括通过另一电感器耦合到全波整流器装置的串联辅助开关，电容器和电感器，用于从缓冲电容器恢复能量。 由辅助电路提供的谐振电路便于辅助开关的软开关，用于低功耗和高频工作。 这些开关可以是反向极化二极管与其漏源路径并联的MOSFET。

公开(公告)号：US5444608A

公开(公告)日：1995-08-22

申请号：US233600

申请日：1994-04-14

申请人： Praveen K. Jain ,  Gary A. Edwards ,  Carl Hubbard ,  Douglas R. Bannard

发明人： Praveen K. Jain ,  Gary A. Edwards ,  Carl Hubbard ,  Douglas R. Bannard

IPC分类号： H02M3/337 ,  H02M3/335

CPC分类号： H02M3/337 ,  Y02B70/1433

摘要： Novel high frequency power distribution systems are disclosed. The system of the present invention uses a relatively high frequency AC (e.g. 100 kHz or higher) and distributes it by a high frequency bus which includes magnetic coupling. AC/DC converters are magnetically connected to the bus by way of associated magnetic coupling and rectify the AC to obtain DC power to be used by a respective load. The bus includes an inductive element which, in one embodiment, forms a series resonant circuit with a capacitive element of the AC/DC converter when it is magnetically connected to the bus.

摘要翻译： 公开了新型高频配电系统。 本发明的系统使用相对高频率的AC（例如100kHz或更高），并且通过包括磁耦合的高频总线进行分配。 AC / DC转换器通过相关的磁耦合磁连接到总线，并对AC进行整流，以获得要由相应负载使用的直流电源。 总线包括电感元件，在一个实施例中，当电磁元件被磁连接到总线时，该电感元件与AC / DC转换器的电容元件形成串联谐振电路。