公开(公告)号：US20120127764A1

公开(公告)日：2012-05-24

申请号：US13040981

申请日：2011-03-04

Applicant: Vijay G. Phadke ,  James Sigamani

Inventor： Vijay G. Phadke ,  James Sigamani

IPC: H02M5/458

CPC classification number: H02J3/383 ,  H02M3/1582 ,  H02M7/4807 ,  Y02E10/563 ,  Y02E10/58

Abstract: A power conversion system for use with a photovoltaic (PV) power source may include a DC/DC converter for converting a first DC voltage into a second DC voltage, an isolation transformer, an inverter for converting DC power to AC power, and at least one controller for controlling the DC/DC converter and the inverter. The controller may be configured to operate the DC/DC converter as a buck converter or a boost converter based, at least in part, on whether the first DC voltage is less or greater than a reference voltage. Additionally, the controller may operate the converter according to a maximum power point tracking algorithm. Further, the controller may be configured to operate the inverter to control the DC voltage at the inverter's input as a function of the AC voltage at the inverter's output. Example embodiments of power systems, DC/DC converters, DC/AC inverters and related methods are also disclosed.

Abstract translation: 与光伏（PV）电源一起使用的电力转换系统可以包括用于将第一DC电压转换为第二DC电压的DC / DC转换器，隔离变压器，用于将DC电力转换成AC电力的逆变器，以及至少 一个用于控制DC / DC转换器和逆变器的控制器。 至少部分地基于第一直流电压是否小于或大于参考电压，控制器可被配置为作为降压转换器或升压转换器来操作DC / DC转换器。 另外，控制器可以根据最大功率点跟踪算法操作转换器。 此外，控制器可以被配置为操作逆变器以根据逆变器输出端的AC电压来控制逆变器输入端的直流电压。 还公开了电力系统，DC / DC转换器，DC / AC逆变器和相关方法的示例实施例。

公开(公告)号：US20070086224A1

公开(公告)日：2007-04-19

申请号：US11580533

申请日：2006-10-13

Applicant: Vijay Phadke ,  James Sigamani ,  Israel Beltran

Inventor： Vijay Phadke ,  James Sigamani ,  Israel Beltran

IPC: H02J1/10

CPC classification number: H02M3/285

Abstract: A multiphase DC to DC converter includes an input, an output, at least first and second converters, an inductor, an output capacitor, and a drive circuit. The drive circuit is configured for switching the first and second converters with a predetermined phase shift therebetween. The output capacitor is operatively coupled between the first and second converters and the output. The inductor can be placed either at the input side or the output side. When placed at the input side, the inductor is operatively coupled between an input capacitor and the first and second converters. When placed at the output side, the inductor is operatively coupled between the first and second converters and the output capacitor. The multiphase DC to DC converter is capable of achieving lossless switching transitions and negligible ripple current in the output capacitor.

Abstract translation: 多相DC-DC转换器包括输入，输出，至少第一和第二转换器，电感器，输出电容器和驱动电路。 驱动电路被配置为以其间的预定相移来切换第一和第二转换器。 输出电容器可操作地耦合在第一和第二转换器和输出端之间。 电感可以放置在输入侧或输出侧。 当放置在输入侧时，电感器可操作地耦合在输入电容器和第一和第二转换器之间。 当放置在输出侧时，电感器可操作地耦合在第一和第二转换器和输出电容器之间。 多相直流 - 直流转换器能够实现输出电容器的无损开关转换和纹波电流可忽略。

公开(公告)号：US07596007B2

公开(公告)日：2009-09-29

申请号：US11580533

申请日：2006-10-13

Applicant: Vijay Phadke ,  James Sigamani ,  Israel Beltran

Inventor： Vijay Phadke ,  James Sigamani ,  Israel Beltran

IPC: H02M7/48

CPC classification number: H02M3/285

Abstract: A multiphase DC to DC converter includes an input, an output, at least first and second converters, an inductor, an output capacitor, and a drive circuit. The drive circuit is configured for switching the first and second converters with a predetermined phase shift therebetween. The output capacitor is operatively coupled between the first and second converters and the output. The inductor can be placed either at the input side or the output side. When placed at the input side, the inductor is operatively coupled between an input capacitor and the first and second converters. When placed at the output side, the inductor is operatively coupled between the first and second converters and the output capacitor. The multiphase DC to DC converter is capable of achieving lossless switching transitions and negligible ripple current in the output capacitor.

Abstract translation: 多相DC-DC转换器包括输入，输出，至少第一和第二转换器，电感器，输出电容器和驱动电路。 驱动电路被配置为以其间的预定相移来切换第一和第二转换器。 输出电容器可操作地耦合在第一和第二转换器和输出端之间。 电感可以放置在输入侧或输出侧。 当放置在输入侧时，电感器可操作地耦合在输入电容器和第一和第二转换器之间。 当放置在输出侧时，电感器可操作地耦合在第一和第二转换器和输出电容器之间。 多相直流 - 直流转换器能够实现输出电容器的无损开关转换和纹波电流可忽略。

公开(公告)号：US20070133232A1

公开(公告)日：2007-06-14

申请号：US11297815

申请日：2005-12-08

Applicant: James Sigamani

Inventor： James Sigamani

IPC: H02M3/335

CPC classification number: H02M3/33507 ,  H02M3/3374 ,  H02M2001/0019 ,  H02M2001/007

Abstract: A two-stage converter including a buck converter and a DC-DC converter that receives power from the buck converter. The DC-DC converter generates an output voltage of the two-stage converter. A buck control circuit generates a control signal for the buck converter. The control signal is based on a first signal representing the output voltage, a second signal representing load applied to the buck converter, and a compensation signal. A characteristic of the compensation signal varies based on the output voltage.

Abstract translation: 包括降压转换器和从降压转换器接收功率的DC-DC转换器的两级转换器。 DC-DC转换器产生两级转换器的输出电压。 降压控制电路产生降压转换器的控制信号。 控制信号基于表示输出电压的第一信号，表示施加到降压转换器的负载的第二信号和补偿信号。 补偿信号的特性根据输出电压而变化。

公开(公告)号：US08861230B2

公开(公告)日：2014-10-14

申请号：US13483891

申请日：2012-05-30

Applicant: James Sigamani ,  Yancy Fontanilla Boncato

Inventor： James Sigamani ,  Yancy Fontanilla Boncato

IPC: H02J3/00

CPC classification number: H02M7/06 ,  H02M1/4225 ,  Y02B70/126

Abstract: A control circuit for controlling one or more power switches of a power converter includes a voltage control loop and a current control loop. The control circuit is configured to generate a current reference for the current control loop using the voltage control loop and an AC reference signal. The control circuit is configured to operate in at least a first mode in which a parameter of the voltage control loop is sampled only at every other zero crossing of the AC reference signal and the sampled parameter is used to generate the current reference for the current control loop. The power converter may be an AC-DC converter or a DC-AC converter (i.e., inverter). Alternatively, the voltage control loop may be sampled at every zero crossing of the AC reference signal, and/or more frequently during transient load conditions.

Abstract translation: 用于控制功率转换器的一个或多个功率开关的控制电路包括电压控制回路和电流控制回路。 控制电路被配置为使用电压控制回路和AC参考信号来产生用于电流控制回路的电流基准。 控制电路被配置为在至少第一模式中操作，其中电压控制回路的参数仅在交流参考信号的每隔一个过零点进行采样，并且采样参数用于生成电流控制的电流参考 循环。 功率转换器可以是AC-DC转换器或DC-AC转换器（即逆变器）。 或者，电压控制回路可以在交流参考信号的每过零点处进行采样，和/或在瞬态负载条件期间更频繁地进行采样。

公开(公告)号：US07616464B2

公开(公告)日：2009-11-10

申请号：US11205209

申请日：2005-08-16

Applicant: Vijay Phadke ,  James Sigamani

Inventor： Vijay Phadke ,  James Sigamani

IPC: H02M7/757 ,  H02M5/42 ,  G05F1/00

CPC classification number: H02M3/33576

Abstract: A reverse current control system for first power converter having a synchronous rectifier and an output inductance includes a reverse current module. The reverse current module monitors a first voltage that is based on an output voltage of the output inductance and a second voltage that is based on an input voltage of the output inductance. The reverse current module anticipates a reverse current condition based on the first and second voltages. When the reverse current condition exists, the reverse current module prevents current from flowing in reverse through the power converter.

Abstract translation: 具有同步整流器和输出电感的第一功率转换器的反向电流控制系统包括反向电流模块。 反向电流模块监视基于输出电感的输出电压的第一电压和基于输出电感的输入电压的第二电压。 反向电流模块基于第一和第二电压预期反向电流状况。 当反向电流条件存在时，反向电流模块可防止电流反向流过电源转换器。

公开(公告)号：US20070229047A1

公开(公告)日：2007-10-04

申请号：US11396423

申请日：2006-03-31

Applicant: James Sigamani ,  Khanderao Gaikwad

Inventor： James Sigamani ,  Khanderao Gaikwad

IPC: G05F1/00

CPC classification number: H02M3/155 ,  H02M1/34 ,  H02M2001/346 ,  H02M2001/348 ,  Y02B70/1491

Abstract: A buck dc-dc converter includes a tapped inductor having an active switch connected to the inductor tap and to a ground. A first diode is connected between the inductor and an input voltage source.

Abstract translation: 降压DC-DC转换器包括抽头电感器，其具有连接到电感器抽头和接地的有源开关。 电感器和输入电压源之间连接有第一个二极管。

公开(公告)号：US20130322122A1

公开(公告)日：2013-12-05

申请号：US13483891

申请日：2012-05-30

Applicant: James Sigamani ,  Yancy Fontanilla Boncato

Inventor： James Sigamani ,  Yancy Fontanilla Boncato

IPC: H02M7/00 ,  H02M7/44 ,  H02M7/04

CPC classification number: H02M7/06 ,  H02M1/4225 ,  Y02B70/126

Abstract: A control circuit for controlling one or more power switches of a power converter includes a voltage control loop and a current control loop. The control circuit is configured to generate a current reference for the current control loop using the voltage control loop and an AC reference signal. The control circuit is configured to operate in at least a first mode in which a parameter of the voltage control loop is sampled only at every other zero crossing of the AC reference signal and the sampled parameter is used to generate the current reference for the current control loop. The power converter may be an AC-DC converter or a DC-AC converter (i.e., inverter). Alternatively, the voltage control loop may be sampled at every zero crossing of the AC reference signal, and/or more frequently during transient load conditions.

Abstract translation: 用于控制功率转换器的一个或多个功率开关的控制电路包括电压控制回路和电流控制回路。 控制电路被配置为使用电压控制回路和AC参考信号来产生用于电流控制回路的电流基准。 控制电路被配置为在至少第一模式中操作，其中电压控制回路的参数仅在交流参考信号的每隔一个过零点进行采样，并且采样参数用于生成电流控制的电流参考 循环。 功率转换器可以是AC-DC转换器或DC-AC转换器（即逆变器）。 或者，电压控制回路可以在交流参考信号的每过零点处进行采样，和/或在瞬态负载条件期间更频繁地进行采样。

公开(公告)号：US08488350B2

公开(公告)日：2013-07-16

申请号：US12567219

申请日：2009-09-25

Applicant: James Sigamani

Inventor： James Sigamani

IPC: H02M7/00 ,  H02M3/335

CPC classification number: H02M7/48 ,  H02J3/383 ,  H02M7/487 ,  H02M2003/1586 ,  Y02E10/563

Abstract: A method of operating a DC-AC inverter to produce AC power having alternating positive and negative half cycles is disclosed. The inverter includes an input connected to a DC power source, an output, a first buck converter coupled between the input and the output and a second buck converter coupled between the input and output. The method includes alternately operating the first buck converter and the second buck converter to alternately produce the positive and negative half cycles at the output.

Abstract translation: 公开了一种操作DC-AC逆变器以产生具有交替正负半周期的交流电的方法。 逆变器包括连接到DC电源的输入端，输出端，耦合在输入端和输出端之间的第一降压转换器和耦合在输入和输出端之间的第二降压转换器。 该方法包括交替地操作第一降压转换器和第二降压转换器以在输出处交替地产生正半周期和负半周期。

公开(公告)号：US20090085543A1

公开(公告)日：2009-04-02

申请号：US12238042

申请日：2008-09-25

Applicant: James Sigamani ,  Gordon Currie

Inventor： James Sigamani ,  Gordon Currie

IPC: G05F1/00

CPC classification number: H02M3/3376 ,  H02M2001/0032 ,  Y02B70/16

Abstract: A method of generating at least a first voltage and a second voltage in a power converter including at least one DC-DC converter is disclosed. The method includes operating the DC-DC converter as a full-bridge converter to generate the first voltage and operating the DC-DC converter as a half-bridge converter to generate the second voltage. Power supplies including a DC-DC converter selectively configurable as a full bridge converter to provide a first DC voltage and as a half bridge converter to produce a second DC voltage and controller circuits for such configuration are also disclosed.

Abstract translation: 公开了一种在包括至少一个DC-DC转换器的功率转换器中产生至少第一电压和第二电压的方法。 该方法包括将DC-DC转换器作为全桥转换器运行以产生第一电压，并将DC-DC转换器作为半桥转换器运行以产生第二电压。 还公开了包括可选择性地配置为全桥转换器以提供第一DC电压的DC-DC转换器的电源以及用于产生第二DC电压的半桥转换器和用于这种配置的控制器电路。