公开(公告)号：US08644035B2

公开(公告)日：2014-02-04

申请号：US13404167

申请日：2012-02-24

申请人： Majid Pahlevaninezhad ,  Praveen Jain

发明人： Majid Pahlevaninezhad ,  Praveen Jain

IPC分类号： H02M3/335

CPC分类号： H02M3/337

摘要： Systems, methods, and circuits for providing zero voltage switching conditions across all load conditions in a full-bridge DC/DC converter. An asymmetric auxiliary circuit is provided and the reactive current due to the auxiliary circuit is controlled across various load conditions. This is done by adaptively adjusting the switching frequency of the converter as well as the phase shift of the rising edges of the waveforms for activating the gates in the leading and lagging legs of the full bridge converter.

摘要翻译： 用于在全桥DC / DC转换器中的所有负载条件下提供零电压开关条件的系统，方法和电路。 提供了非对称辅助电路，并且在各种负载条件下控制由辅助电路引起的无功电流。 这通过自适应地调整转换器的开关频率以及用于激活全桥转换器的前导和滞后支路中的门的波形的上升沿的相移来完成。

公开(公告)号：US20130235631A1

公开(公告)日：2013-09-12

申请号：US13415931

申请日：2012-03-09

申请人： Majid Pahlevaninezhad ,  Praveen Jain

发明人： Majid Pahlevaninezhad ,  Praveen Jain

IPC分类号： H02M1/42

CPC分类号： H02M1/42 ,  H02M1/4225 ,  H02M3/1584 ,  Y02B70/12 ,  Y02B70/126

摘要： Circuits and methods relating to the provision of a reactive current to ensure zero voltage switching in a boost power factor correction converter. A simple passive circuit using a series connected inductor and capacitor are coupled between two phases of an interleaved boost PFC converter. The passive circuit takes advantage of the 180° phase-shift between the two phases to provide reactive current for zero voltage switching. A control system for adjusting and controlling the reactive current to ensure ZVS for different loads and line voltages is also provided.

摘要翻译： 与提供无功电流相关的电路和方法，以确保升压功率因数校正转换器中的零电压开关。 使用串联连接的电感器和电容器的简单无源电路耦合在交错升压PFC转换器的两相之间。 无源电路利用两相之间的180°相移来为零电压开关提供无功电流。 还提供了一种用于调节和控制无功电流以确保不同负载和线路电压的ZVS的控制系统。

公开(公告)号：US20120146526A1

公开(公告)日：2012-06-14

申请号：US13391491

申请日：2010-08-20

申请人： John Lam ,  Praveen Jain

发明人： John Lam ,  Praveen Jain

IPC分类号： H05B37/02

CPC分类号： H05B41/2824 ,  Y02B20/186

摘要： This invention provides an integrated power supply for a controller of an electronic ballast for a fluorescent lamp. The integrated power supply couples output power from the electronic ballast and uses the coupled power to provide power to the controller. In one embodiment, the electronic ballast may include a rectifier for converting an alternating current input voltage into a direct current output voltage, and a circuit including a combined power factor correction (PFC) stage and an inverter, wherein the PFC stage and the inverter share a switch. Also provided is a controller for an electronic ballast. The controller may include a voltage mode or current mode duty ratio controller that controls a duty ratio of a switch of the ballast. The controller and the ballast allow dimming of the fluorescent lamp while maintaining a high power factor.

摘要翻译： 本发明提供一种用于荧光灯的电子镇流器的控制器的集成电源。 集成电源耦合来自电子镇流器的输出功率，并使用耦合功率向控制器供电。 在一个实施例中，电子镇流器可以包括用于将交流输入电压转换成直流输出电压的整流器，以及包括组合功率因数校正（PFC）级和反相器的电路，其中PFC级和逆变器共享 一个开关 还提供了一种用于电子镇流器的控制器。 控制器可以包括控制镇流器开关的占空比的电压模式或电流模式占空比控制器。 控制器和镇流器允许荧光灯调光，同时保持高功率因数。

公开(公告)号：US20060039366A1

公开(公告)日：2006-02-23

申请号：US10923223

申请日：2004-08-20

申请人： Kalyan Ghosh ,  Praveen Jain ,  Shankar Subramaniam ,  Rajesh Bhandari ,  Prabesh Nanjundaiah

发明人： Kalyan Ghosh ,  Praveen Jain ,  Shankar Subramaniam ,  Rajesh Bhandari ,  Prabesh Nanjundaiah

IPC分类号： H04L12/28

CPC分类号： H04L45/00 ,  H04L45/245 ,  Y02D50/30

摘要： According to the present invention, methods and apparatus are provided to allow efficient and effective aggregation of ports into port channels in a fibre channel network. A local fibre channel switch can automatically identify compatible ports and initiate exchange sequences with a remote fibre channel switch to aggregate ports into port channels. Ports can be aggregated synchronously to allow consistent generation of port channel map tables.

摘要翻译： 根据本发明，提供了方法和装置，以允许端口有效且有效地聚合到光纤信道网络中的端口信道中。 本地光纤通道交换机可以自动识别兼容端口，并启动与远程光纤通道交换机的交换序列，将端口聚合成端口通道。 端口可以​​同步聚合，以便一致地生成端口通道映射表。

公开(公告)号：US10277120B1

公开(公告)日：2019-04-30

申请号：US15874760

申请日：2018-01-18

申请人： Marko Krstic ,  Praveen Jain

发明人： Marko Krstic ,  Praveen Jain

IPC分类号： H02M3/07

摘要： A structure and method is provided for DC to DC conversion using switched-capacitors. The DC-DC converter uses an optimized configuration of capacitors and switches that maximize the number of attainable ideal conversion ratios for the given number of capacitors. A method is provided for controlling the converter, wherein the control circuitry generates a multiphase switching sequence which turns the switches on and off in a cyclical manner. Sample switching sequences are provided to generate a set of attainable ideal conversion ratios, for up to three floating capacitors. The converter is programmable, modular and capable of dynamically varying its ideal conversion gain. It can be used to both step-up and step-down the input voltage.

公开(公告)号：US09727521B2

公开(公告)日：2017-08-08

申请号：US13620232

申请日：2012-09-14

申请人： Dennis K. Ma ,  Karan Gupta ,  Lei Tian ,  Franck R. Diard ,  Praveen Jain ,  Wei-Je Huang ,  Atul Kalambur

发明人： Dennis K. Ma ,  Karan Gupta ,  Lei Tian ,  Franck R. Diard ,  Praveen Jain ,  Wei-Je Huang ,  Atul Kalambur

IPC分类号： G06F15/167 ,  G06F15/16 ,  G06F15/163 ,  G06F15/173 ,  G06F15/17

CPC分类号： G06F15/167 ,  G06F15/16 ,  G06F15/163 ,  G06F15/17 ,  G06F15/173

摘要： Techniques are disclosed for peer-to-peer data transfers where a source device receives a request to read data words from a target device. The source device creates a first and second read command for reading a first portion and a second portion of a plurality of data words from the target device, respectively. The source device transmits the first read command to the target device, and, before a first read operation associated with the first read command is complete, transmits the second read command to the target device. The first and second portions of the plurality of data words are stored in a first and second portion a buffer memory, respectively. Advantageously, an arbitrary number of multiple read operations may be in progress at a given time without using multiple peer-to-peer memory buffers. Performance for large data block transfers is improved without consuming peer-to-peer memory buffers needed by other peer GPUs.

公开(公告)号：US09571005B2

公开(公告)日：2017-02-14

申请号：US14590684

申请日：2015-01-06

申请人： Majid Pahlevaninezhad ,  Shangzhi Pan ,  Praveen Jain

发明人： Majid Pahlevaninezhad ,  Shangzhi Pan ,  Praveen Jain

IPC分类号： H02M7/68 ,  H02M3/24 ,  H02M7/44 ,  H02M7/537 ,  H02M7/5387 ,  H02M1/12 ,  H02M1/00 ,  H02M7/48

CPC分类号： H02M7/5387 ,  H02M1/126 ,  H02M2001/0058 ,  H02M2007/4815 ,  Y02B70/1441 ,  Y02B70/1491

摘要： Systems and methods relating to zero voltage switching for inverters. A full bridge inverter is used in conjunction with a passive auxiliary circuit and an output filter. A control system controls the current by way of the auxiliary circuit and injects a high quality current to a power grid. The control system adjusts the duty ratio and switching frequency of the gate pulses applied to the power semiconductors in the full-bridge inverter. As well, the control system adjusts the phase shift between gate pulses for both the leading leg and lagging leg power semiconductors to control the current passing through the auxiliary circuit.

摘要翻译： 与逆变器的零电压开关相关的系统和方法。 全桥逆变器与无源辅助电路和输出滤波器结合使用。 控制系统通过辅助电路控制电流，并向电网注入高质量的电流。 控制系统调整施加到全桥逆变器中的功率半导体的栅极脉冲的占空比和开关频率。 同样，控制系统调节前腿和滞后脚功率半导体的门脉冲之间的相移，以控制通过辅助电路的电流。

公开(公告)号：US09570970B1

公开(公告)日：2017-02-14

申请号：US14808408

申请日：2015-07-24

申请人： Suzan Eren ,  Majid Pahlevaninezhad ,  Praveen Jain

发明人： Suzan Eren ,  Majid Pahlevaninezhad ,  Praveen Jain

IPC分类号： H02M1/08 ,  H02M1/12 ,  H02M7/5387 ,  H02M7/44

CPC分类号： H02M1/12 ,  H02M7/53873 ,  H02M7/539 ,  H02M2001/0025 ,  H02M2007/4815 ,  Y02B70/1441

摘要： Systems, methods, and devices relating to the controlling of a grid-connected inverter. A grid connected inverter is controlled by a proportional-resonant controller which tracks the grid current. To adjust for changes in grid conditions, an update block dynamically and continuously adjusts coefficients used by the controller to ensure high gains provided by the controller at the grid frequency. A harmonic compensator is also provided to ensure that high loop gains at harmonic frequencies of the grid frequency are also provided for. To also adjust for changing grid conditions, a second update block also continuously adjusts the coefficients used by the harmonic compensator.

摘要翻译： 与并网逆变器的控制相关的系统，方法和设备。 并网逆变器由跟踪电网电流的比例谐振控制器控制。 为了调整电网条件的变化，更新块动态和连续地调整控制器使用的系数，以确保控制器在电网频率下提供的高增益。 还提供谐波补偿器，以确保还提供电网频率谐波频率的高回路增益。 为了也适应于改变电网条件，第二更新块还连续调整谐波补偿器使用的系数。

公开(公告)号：US09257864B2

公开(公告)日：2016-02-09

申请号：US13425734

申请日：2012-03-21

申请人： Majid Pahlevaninezhad ,  Praveen Jain

发明人： Majid Pahlevaninezhad ,  Praveen Jain

IPC分类号： H02J7/00 ,  H02J7/02 ,  H02M1/10 ,  H02M1/42

CPC分类号： H02J7/022 ,  H02M1/10 ,  H02M1/4225 ,  Y02B40/90 ,  Y02B70/126

摘要： A control approach of adjusting the input power of a power factor correction (PFC) stage so that the output voltage (DC-link) of the input AC/DC stage to an intermediate DC voltage (DC-Bus voltage) is adjusted based on the amount of power required to charge a high energy battery is disclosed. The present invention controls the input power of the PFC instead of the DC-bus voltage as is common in conventional methods. Therefore, a very fast response compared to the conventional sluggish voltage loop can be achieved. Also, having different DC-bus voltages for different output load conditions allows the DC/DC converter to work with an optimal duty cycle for a whole range of load variations.

摘要翻译： 调整功率因数校正（PFC）级的输入功率的控制方法，使得输入AC / DC级的输出电压（DC-link）与中间DC电压（DC-Bus电压）的调整基于 公开了对高能电池充电所需的功率量。 本发明控制PFC的输入功率而不是常规方法中常见的直流母线电压。 因此，可以实现与传统的缓慢的电压环路相比非常快的响应。 而且，对于不同的输出负载条件，具有不同的直流母线电压允许DC / DC转换器在整个负载变化范围内以最佳工作周期工作。

公开(公告)号：US09049773B2

公开(公告)日：2015-06-02

申请号：US13459562

申请日：2012-04-30

申请人： John Lam ,  Praveen Jain

发明人： John Lam ,  Praveen Jain

IPC分类号： H05B37/02 ,  H05B41/282 ,  H05B41/392

CPC分类号： H05B41/2824 ,  H05B41/3927 ,  Y02B20/186

摘要： Provided are circuits and methods for a digital controller for an electronic ballast for a fluorescent lamp, comprising a feed-forward loop that provides information about a voltage firing angle, and a pulse width modulator that controls a duty ratio of at least one power switch of the electronic ballast according to the information. The digital controller may include a duty ratio controller implemented in the pulse width modulator. The digital controller may include one or more functions such as dimming, maintaining high power factor throughout the dimming range, low lamp power detection, lamp soft-start, and DC-link capacitor over-voltage detection for end of life protection or lamp failure protection. In one embodiment the ballast is a single stage, single switch ballast.

摘要翻译： 提供了一种用于荧光灯电子镇流器的数字控制器的电路和方法，包括提供关于电压触发角度的信息的前馈环路和控制至少一个电源开关的占空比的脉宽调制器 电子镇流器根据信息。 数字控制器可以包括在脉冲宽度调制器中实现的占空比控制器。 数字控制器可以包括一个或多个功能，例如调光，在整个调光范围内维持高功率因数，低灯功率检测，灯软启动和用于寿命终止保护或灯故障保护的直流链路电容器过电压检测 。 在一个实施例中，镇流器是单级单开关镇流器。