公开(公告)号：US09692309B1

公开(公告)日：2017-06-27

申请号：US15378554

申请日：2016-12-14

Applicant: Google Inc.

Inventor： Sangsun Kim ,  Eduardo M. Lipiansky

IPC: G01R21/00 ,  H02M5/04 ,  H02M1/12 ,  G01R19/175 ,  G01R31/42 ,  G01R19/25

CPC classification number: H02M5/04 ,  G01R19/175 ,  G01R19/2513 ,  G01R21/00 ,  G01R21/006 ,  G01R31/42 ,  G06F11/3058 ,  H02J3/00 ,  H02J3/01 ,  H02J13/0006 ,  H02M1/12

Abstract: Devices and methods for monitoring and determining alternating current (AC) power system parameters are provided. In some implementations, the device can include a processor; and at least one non-transitory computer-readable medium storing computer-executable instructions for implementing a number of components. The components include a monitor configured to: sense an AC line voltage signal and an AC current voltage signal; filter the AC line voltage signal; calculate average AC line voltage and current values based, at least, on a DC voltage and current values corresponding to the AC line voltage and current signals, respectively; determine fundamental AC line voltage and current signals based, at least, on zero crossings of the respective average AC line voltage value and the average AC line current value; and determine one or more AC power system parameters based, at least, on the fundamental AC line voltage signal and the fundamental AC line current signal.

公开(公告)号：US09151817B1

公开(公告)日：2015-10-06

申请号：US13869419

申请日：2013-04-24

Applicant: Google Inc.

Inventor： Srikanth Lakshmikanthan ,  Eduardo M. Lipiansky ,  Udaya Kiran Ammu

IPC: H03M1/10 ,  G01R35/00

CPC classification number: G01R35/005 ,  G01R19/0092 ,  G01R35/007

Abstract: The present invention pertains to calibration in current sensing applications. Power conversion systems such as those used in computer architectures may employ step down converters such as buck converters or other types of converters. The present invention provides calibration processes and devices to account for various parasitic resistances which are found in such systems. A calibration circuit may be coupled to the buck converter or other power conversion to determine a calibrated voltage signal for the output of the power converter. An effective DC resistance may be determined and programmed for use by a control device used. In this way, the parasitic resistances are taken into account to obtain an accurate estimate of the actual current. In turn, this enables power converters and other devices to operate within specification requirements.

Abstract translation: 本发明涉及电流感测应用中的校准。 诸如在计算机体系结构中使用的电力转换系统可以采用降压转换器，例如降压转换器或其他类型的转换器。 本发明提供校准过程和装置以解决在这种系统中发现的各种寄生电阻。 校准电路可以耦合到降压转换器或其他功率转换，以确定用于功率转换器的输出的校准电压信号。 可以确定并编程有效的直流电阻以供所使用的控制装置使用。 以这种方式，考虑寄生电阻以获得实际电流的准确估计。 反过来，这使得电源转换器和其他设备能够在规范要求范围内运行。