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公开(公告)号：US4843311A
公开(公告)日：1989-06-27
申请号：US73477
申请日：1987-07-15
申请人： Miro Rozman , Silvo Zlebir
发明人： Miro Rozman , Silvo Zlebir
摘要： A wattmeter in which a Hall sensor is provided with a large number of Hall elements, whose voltages are individually tapped. The wattmeter circuit is further provided with an impulse-width modulator, the input voltage of this modulator being periodically reversed, with a feedback to compensate the disturbing voltages, and with a circuit for precision curvature compensation CMOS bandgap reference. The output of an embodiment of the wattmeter is adapted to the reading-off by a computer. A wattmeter can be realized on a semiconductor wafer.
摘要翻译： 其中霍尔传感器设置有大量霍尔元件的功率表，其电压被单独地抽头。 功率计电路还设置有脉冲宽度调制器，该调制器的输入电压周期性反转，具有反馈以补偿干扰电压，并且具有用于精确曲率补偿CMOS带隙基准的电路。 瓦特计的实施例的输出适于由计算机读取。 可以在半导体晶片上实现瓦特计。
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公开(公告)号：US4764720A
公开(公告)日：1988-08-16
申请号：US77009
申请日：1987-07-22
申请人： Robert W. Nystrom
发明人： Robert W. Nystrom
CPC分类号： G01R21/08
摘要： Disclosed is an apparatus and method for sensing power in a variable frequency machine. The power is sensed in each phase of the three phase machine by utilizing Hall generators for multiplying the phase current flowing through each phase by a current proportional to a phase voltage for each phase. The products are then summed to obtain a reading of the instantaneous power drawn by the three phase machine. The AC component is filtered out of the summed signal using a multi-stage filter which allows for maintaining of a fast response time with low ripple. In a preferred embodiment, a four stage filter utilizing R.C. filters is employed for this purpose.
摘要翻译： 公开了一种用于感测变频机中的功率的装置和方法。 通过利用霍尔发生器将流过每相的相电流乘以与每相相位电压成比例的电流，在三相机的每个相中感测功率。 然后将产品求和，以获得三相机所获得的瞬时功率的读数。 使用多级滤波器将交流分量从加法信号中滤出，允许以低纹波保持快速响应时间。 在优选实施例中，使用R.C. 为此目的使用过滤器。
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公开(公告)号：US11789049B2
公开(公告)日：2023-10-17
申请号：US17137383
申请日：2020-12-30
发明人： Shun-Nan Tai
CPC分类号： G01R21/14 , G01R15/005 , H03K17/56
摘要： A power detector includes a detection circuit and a bias circuit. The detection circuit is used to receive an input signal and output a power indication signal. The bias circuit includes a first impedance unit, a second impedance unit and a transistor. The transistor includes a first terminal and a control terminal coupled to the first impedance unit, and a second terminal. The second impedance unit is coupled between the first terminal of the transistor and an output terminal of the bias circuit, or between the second terminal of the transistor and a second terminal of the bias circuit. The output terminal of the bias circuit is coupled to an input terminal of the detection circuit, and is used to output a bias signal.
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公开(公告)号：US20230110327A1
公开(公告)日：2023-04-13
申请号：US17952097
申请日：2022-09-23
发明人： Adrian John BERGSMA
摘要： In some embodiments, a compensated power detector can include a power detector that includes a first detection cell having a bias input and an output, and a second detection cell having a signal input, a bias input and an output. The power detector can further include an error amplifier having a first input coupled to the output of the first detection cell, and a second input for receiving a reference voltage. The error amplifier can be configured to provide an output voltage to each of the bias inputs of the first and second detection cells, such that an output of the second detection cell is representative of power of a radio-frequency signal received at the signal input with an adjustment for one or more non-signal effects as measured by the first detection cell and the error amplifier.
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公开(公告)号：US20220034949A1
公开(公告)日：2022-02-03
申请号：US17443998
申请日：2021-07-29
摘要： A power conversion device includes a power conversion circuit including a temperature sensor configured to detect a temperature at a sensor position and a switch configured to switch a connection on and off at a switch position separated from the sensor position; a loss calculation processing circuitry configured to calculate a power loss in the switch; a loss correction processing circuitry configured to correct a calculation result of the power loss on the basis of a detection result of the temperature at the sensor position; a temperature correction processing circuitry configured to correct the detection result of the temperature on the basis of the calculation result of the power loss; and a temperature estimation processing circuitry configured to estimate a temperature at the switch position on the basis of a corrected calculation result of the power loss and a corrected detection result of the temperature.
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公开(公告)号：US20210318365A1
公开(公告)日：2021-10-14
申请号：US17137383
申请日：2020-12-30
发明人： Shun-Nan Tai
摘要： A power detector includes a detection circuit and a bias circuit. The detection circuit is used to receive an input signal and output a power indication signal. The bias circuit includes a first impedance unit, a second impedance unit and a transistor. The transistor includes a first terminal and a control terminal coupled to the first impedance unit, and a second terminal. The second impedance unit is coupled between the first terminal of the transistor and an output terminal of the bias circuit, or between the second terminal of the transistor and a second terminal of the bias circuit. The output terminal of the bias circuit is coupled to an input terminal of the detection circuit, and is used to output a bias signal.
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公开(公告)号：US11056868B2
公开(公告)日：2021-07-06
申请号：US15933058
申请日：2018-03-22
摘要： A monitoring accessory for an electrical apparatus provided with a connection terminal capable of being connected to an electric cable, the monitoring accessory comprising a frame provided with a cooperation system configured to cooperate with the electrical apparatus in a mounted position, a current sensor arranged to measure a current intensity passing through the electric cable, when the electric cable is connected to the connection terminal, the current sensor comprising a measuring portion forming a loop capable of surrounding a section of the electric cable, the measuring portion being provided with a closing system capable of holding the loop in a closed position and forming a passage space for said section of the electric cable inside the loop in the open position.
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49.发明申请公开(公告)号：US20200369172A1
公开(公告)日：2020-11-26
申请号：US16767891
申请日：2018-10-12
发明人： Sebastian Bode
摘要： The invention relates to means for a calibration standards-compliant determination of the electrical energy transferred from a charging station, which make a measurement at the transfer point, that is to say at the vehicle-side end of the charging cable, unnecessary. Here, the electrical energy transferred from a charging station is determined by a measurement of the energy before the transfer point, wherein the reactive power component from the termination point as far as the transfer point is compensated. The reactive power component is determined from at least one second electrical variable, for example a resistance of a conductor or a conductor shield, which is in a fixed relationship with an analog electrical variable that is relevant to the transferred electrical energy, for example an ohmic total resistance of at least two conductors involved in a charging circuit.
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公开(公告)号：US20180306839A1
公开(公告)日：2018-10-25
申请号：US15767635
申请日：2016-10-14
IPC分类号： G01R15/16 , G01R21/133 , G01R29/08 , G01R35/00 , G01R21/14
CPC分类号： G01R15/165 , G01R21/133 , G01R21/14 , G01R29/085 , G01R35/005
摘要： Methods and apparatus for non-intrusive monitoring by sensing physical parameters such as electric and/or magnetic fields. Such apparatus and techniques may find application in a variety of fields, such as monitoring consumption of electricity, for example
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