公开(公告)号：US20230296560A1

公开(公告)日：2023-09-21

申请号：US17698263

申请日：2022-03-18

Applicant: Hach Company

Inventor： David Langley Rick

IPC: G01N27/48 ,  G01R19/02

CPC classification number: G01N27/48 ,  G01R19/02

Abstract: An embodiment provides a method for measuring a component of an aqueous sample using square wave voltammetry, including: introducing the aqueous sample to a chamber of a square wave voltammetry apparatus; applying a stimulus voltage step to the aqueous sample, wherein the stimulus voltage comprises a staircase voltage, wherein each step of the staircase voltage defines a group and comprises two or more repeated square wave modulations of equal voltage amplitude; measuring a resultant current output resulting from the stimulus voltage, wherein the measuring comprises square wave voltammetry; and averaging the resultant current output across at least two or more cycles of each group. Other aspects are described and claimed.

公开(公告)号：US20190212381A1

公开(公告)日：2019-07-11

申请号：US16242563

申请日：2019-01-08

Applicant: ABB Schweiz AG

Inventor： Silvio Scaletti ,  Alessandro Guerriero ,  Matteo Gargiulo

IPC: G01R31/02 ,  H02M7/44 ,  G01R19/02 ,  G01R19/25 ,  H02J3/38

CPC classification number: G01R31/025 ,  G01R19/02 ,  G01R19/2513 ,  H02H3/33 ,  H02H3/347 ,  H02H7/20 ,  H02J3/383 ,  H02M1/32 ,  H02M7/44 ,  H02M2001/0009

Abstract: A method for detecting earth-fault conditions in a power conversion apparatus including the following steps: acquiring a first detection signal indicative of an earth-leakage current flowing between the power conversion apparatus and the ground; processing the first detection signal to calculate a first processing signal indicative of a time variant component of the earth-leakage current for one or more selected frequency bands of interest; processing the first detection signal to calculate a second processing signal indicative of a time-invariant component of the earth-leakage current; processing the first and second processing signals to calculate a third processing signal indicative of a resistive component of the earth-leakage current; and processing the third processing signal to determine whether earth-fault conditions are present.

公开(公告)号：US09958481B2

公开(公告)日：2018-05-01

申请号：US14773380

申请日：2014-03-31

Applicant: Weidmueller Interface GmbH & Co. KG

Inventor： Michael Gerkens ,  Christian Heggemann ,  Hans Schlingmann

IPC: G01R15/20 ,  G01R33/07 ,  G01R19/02 ,  G01R15/18 ,  H01F38/40 ,  G01R19/25 ,  H02M1/00

CPC classification number: G01R15/202 ,  G01R15/18 ,  G01R19/02 ,  G01R19/2509 ,  H01F38/40 ,  H02M2001/0009

Abstract: A current transformer arrangement, and method, include a current sensor for producing a sensor output voltage that is proportional to the input current flowing in a conductor; a first processing branch including a voltage calculating device for calculating the effective voltage value of the sensor output voltage; a second processing branch including a polarity detecting device having an input terminal connected with the current sensor output terminal to produce a polarity signal having one polarity when the conductor input current is either an alternating current, a hybrid current, or a direct current flowing in one direction, and the opposite polarity when the conductor input current is a direct current flowing in the opposite direction; and a multiplier device for modifying the effective voltage value to produce a signed effective voltage having a polarity corresponding with the polarity of the polarity signal. A modifying circuit modifies the signed effective voltage.

公开(公告)号：US20180088154A1

公开(公告)日：2018-03-29

申请号：US15561570

申请日：2016-02-10

Applicant: Robert Bosch GmbH

Inventor： Daniel Zimmermann ,  Christian Djonga ,  Michele Hirsch

IPC: G01R19/02 ,  H02P23/14

CPC classification number: G01R19/02 ,  H02P23/14 ,  H02P27/08

Abstract: The invention provides a method and an apparatus for estimating an RMS current (Ic,rms) of an intermediate circuit capacitor (CZWK) for a complete system of a battery (1), an inverter (9) and an N-phase electrical machine (6), wherein, in the complete system, the inverter (9) converts a DC power received from the battery (1) for the purpose of energizing the electrical machine with N phase currents, and wherein the RMS current (Ic,rms) of the intermediate circuit capacitor to be estimated is calculated according to a calculation rule which is supplied with predefined switching times (tLow,off, tHigh,off) of the N phases of the electrical machine, measured phase currents (ISu, ISv, ISw) of N-1 phases or N phases of the electrical machine and a predefined battery direct current (IBatt) as input variables. This makes it possible to exactly estimate the RMS current (Ic,rms) of an intermediate circuit capacitor for any desired pulse patterns for controlling the inverter.

公开(公告)号：US20180083434A1

公开(公告)日：2018-03-22

申请号：US15269513

申请日：2016-09-19

Applicant: Ze Chen

Inventor： Boon Lum Lim ,  Samuel Raj

IPC: H02H1/00 ,  G01R31/02 ,  G01R19/04 ,  G01R19/02 ,  H02H3/38 ,  H02H3/16 ,  H01H71/24 ,  H01H71/58 ,  H01H71/12 ,  H01H9/54 ,  H01H71/04

CPC classification number: H02H1/0015 ,  G01R19/02 ,  G01R19/16571 ,  G01R19/16576 ,  G01R31/024 ,  G01R31/1227 ,  H01H71/04 ,  H01H71/58 ,  H01H71/62 ,  H01H83/04 ,  H01H2071/044 ,  H01H2083/201 ,  H02H3/044

Abstract: In one example, an arc fault circuit interrupter (AFCI) is provided. The AFCI may include a plurality of current arc signature detection blocks configured to output a plurality of corresponding current arc signatures, and a processor. The processor may be configured to receive each of the plurality of current arc signature from each of plurality of current arc signature detection blocks, respectively, and generate a first trigger signal. The processor may be further configured to assess each of the current arc signatures, determine whether an arc fault exists based on the assessment, and generate the first trigger signal if an arc fault is determined to exist. A method for detecting an arc fault is also provided.

公开(公告)号：US20170205450A1

公开(公告)日：2017-07-20

申请号：US14995976

申请日：2016-01-14

Applicant: Qualcomm Technologies International, Ltd.

Inventor： Oleg Popov

IPC: G01R21/06 ,  G01R19/02 ,  G01R17/02

CPC classification number: G01R21/06 ,  G01R17/02 ,  G01R19/02 ,  G01R21/10

Abstract: A power detector measures RF power delivered into a first load of uncertain impedance. A reference power meter measures power of a reference signal to a second load of known impedance. The reference power meter measures voltage across the second load; measures a current through the second load; and multiplies the measured voltage by the measured current to generate a reference power signal proportional to power delivered to the second load. A measurement power meter measures power of a signal to the first load. The measurement power meter measures voltage across the first load; measures current through the first load; and multiplies the measured voltage by the measured current to generate a measured power signal proportional to power delivered to the first load. The power detector includes a processor to calculate power delivered to the second load, and to generate a power delivered to the first load.

公开(公告)号：US20140285249A1

公开(公告)日：2014-09-25

申请号：US13848929

申请日：2013-03-22

Applicant: ANALOG DEVICES TECHNOLOGY

Inventor： Eberhard Brunner

IPC: G01R19/02

CPC classification number: G01R19/02

Abstract: A root-mean-square (RMS) detector includes detection circuitry having as an input a radio frequency signal, target voltage and a set voltage and a RMS signal as an output, and a gain stage within the detection circuitry to produce the RMS signal as an output. The gain stage provides for faster settling times of the detector.

Abstract translation: 均方根（RMS）检测器包括检测电路，其具有作为输入的射频信号，目标电压和设定电压以及RMS信号作为输出，以及检测电路内的增益级，以产生RMS信号作为 一个输出。 增益级提供检测器更快的建立时间。

公开(公告)号：US20140253102A1

公开(公告)日：2014-09-11

申请号：US14203502

申请日：2014-03-10

Applicant: METROIC LIMITED

Inventor： Stephen James Martin WOOD ,  Jonathan Ephraim David HURWITZ ,  Seyed Amir Ali DANESH

IPC: G01R17/00

CPC classification number: G01R15/146 ,  G01R1/203 ,  G01R11/25 ,  G01R15/04 ,  G01R15/14 ,  G01R19/0084 ,  G01R19/0092 ,  G01R19/02 ,  G01R21/00 ,  G01R21/133 ,  G01R21/14 ,  G01R23/02 ,  G01R27/02 ,  G01R27/16 ,  G01R27/26 ,  G01R27/28 ,  G01R35/04

Abstract: The present invention relates to current measurement apparatus 100. The current measurement apparatus 100 comprises a measurement arrangement 110, 114 which is configured to be disposed in relation to a load 108 which draws a current signal, the measurement arrangement being operative when so disposed to measure the load drawn current signal. The current measurement apparatus 100 also comprises a signal source 112 which is operative to apply a reference input signal to the measurement arrangement 110, 114 whereby an output signal from the measurement arrangement comprises a load output signal corresponding to the load drawn current signal and a reference output signal corresponding to the reference input signal. The current measurement apparatus 100 further comprises processing apparatus 116 which is operative to receive the output signal and to make a determination in dependence on the reference output signal and the load output signal, the determination being in respect of at least one of the load drawn current signal and electrical power consumed by the load.

Abstract translation: 电流测量装置100本发明涉及电流测量装置100.电流测量装置100包括测量装置110,114，该测量装置被配置为相对于牵引电流信号的负载108设置，该测量装置在这样设置时可操作以测量 负载拉电流信号。 电流测量装置100还包括信号源112，其可操作以将参考输入信号施加到测量装置110,114，由此来自测量装置的输出信号包括对应于负载牵引电流信号的负载输出信号和参考 输出信号对应于参考输入信号。 当前测量装置100还包括处理装置116，其可操作以接收输出信号并根据参考输出信号和负载输出信号作出确定，所述确定涉及至少一个负载牵引电流 负载消耗的信号和电力。

公开(公告)号：US20140118050A1

公开(公告)日：2014-05-01

申请号：US14067411

申请日：2013-10-30

Applicant: Marvell World Trade Ltd.

Inventor： Chandra B. PRAKASH ,  Manas Behera ,  Gregory T. Uehara

IPC: G01R19/02

CPC classification number: G01R19/02 ,  G01R21/12 ,  H04B17/318

Abstract: New devices and methods capable of detecting a true Root-Mean-Square (RMS) power level of an analog input signal are disclosed. For example, an electronic circuit can include a squaring circuit that receives the analog input signal and processes the analog input signal so as to produce a squared-output of the analog input signal using an analog transfer function of the squaring circuit, and a square-root circuit that receives the squared-output and processes the squared-output using an analog transfer function of the square-root circuit so as to produce an analog RMS output signal representing the true RMS power level of the analog input signal.

Abstract translation: 公开了能够检测模拟输入信号的真正均方根（RMS）功率电平的新器件和方法。 例如，电子电路可以包括平方电路，其接收模拟输入信号并处理模拟输入信号，以便使用平方电路的模拟传递函数产生模拟输入信号的平方输出， 根电路，其接收平方输出并使用平方根电路的模拟传递函数处理平方输出，以产生表示模拟输入信号的真有效功率电平的模拟RMS输出信号。

公开(公告)号：US20140062201A1

公开(公告)日：2014-03-06

申请号：US13601841

申请日：2012-08-31

Applicant: Lorenzo Giuntini ,  Silvio Colombi ,  Andrea Mannuccini

Inventor： Lorenzo Giuntini ,  Silvio Colombi ,  Andrea Mannuccini

IPC: H02J9/00 ,  G06F19/00

CPC classification number: G01R19/16547 ,  G01R19/02 ,  G01R19/2513 ,  G01R23/20 ,  G01R31/40 ,  H02J9/062 ,  Y10T307/615

Abstract: A system may include an uninterruptible power supply (UPS) configured to provide power to a load via a bypass feed path coupled to a first power source or via an inverter feed path coupled to a second power source. The UPS may include a controller configured to switch between providing power to the load via the bypass feed path and the inverter feed path based at least in part on a real-time calculation of an amount of voltage distortion present on a voltage signal input to the load via the bypass path. As such, the controller may be configured to provide power to the load via the inverter feed path when the amount of voltage distortion is greater than a limit.

Abstract translation: 系统可以包括不间断电源（UPS），其被配置为经由耦合到第一电源的旁路供电路径或经由耦合到第二电源的逆变器馈送路径向负载提供电力。 UPS可以包括控制器，其被配置为在至少部分地基于输入到所述旁路供电路径的电压信号上存在的电压失真的量的实时计算来经由旁路供给路径向所述负载提供电力和所述逆变器馈送路径之间切换 通过旁路通路加载。 因此，控制器可以被配置为当电压失真量大于极限时经由逆变器馈送路径向负载提供电力。