公开(公告)号：US20110267032A1

公开(公告)日：2011-11-03

申请号：US13143318

申请日：2009-12-11

申请人： Zhigao Zhang ,  Zhishou Zheng ,  Qingchang Qu

发明人： Zhigao Zhang ,  Zhishou Zheng ,  Qingchang Qu

IPC分类号： G01R19/15

CPC分类号： G01R21/133 ,  G01R15/142 ,  G01R21/06

摘要： This disclosure relates to a three-phase electric energy measurement apparatus, comprising: a voltage detection unit for detecting voltage of each phase in power transmitting lines where the voltage detection unit is; a current detection unit for detecting current of each phase in the power transmitting lines where the current detection unit is; an electric energy calculation unit, connected to said voltage detection unit and said current detection unit, for receiving signals outputted from said voltage detection unit and said current detection unit, and performing signal processing and calculation, and then outputting a calculation result; wherein both said voltage detection unit and said electric energy calculation unit are connected in a star connection mode, forming a common virtual ground. Through the above-mentioned grounding manner different from that in the prior art, a three-phase four-wire electric energy meter is formed using a three-phase three-wire connection method. As a result, devices required by the three-phase electric energy measurement apparatus are saved, thereby reducing manufacture costs, and meanwhile, measurement errors due to asymmetrical loads of three phases are eliminated, thereby improving the measurement accuracy. Besides this, detection of single-phase current and single-phase voltage can be realized.

摘要翻译： 本公开涉及一种三相电能测量装置，包括：电压检测单元，用于检测电压检测单元所在的输电线路中的每相的电压; 电流检测单元，用于检测电流检测单元的电力传输线路中的各相的电流; 电能计算单元，连接到所述电压检测单元和所述电流检测单元，用于接收从所述电压检测单元和所述电流检测单元输出的信号，并执行信号处理和计算，然后输出计算结果; 其中所述电压检测单元和所述电能计算单元都以星形连接模式连接，形成公共虚拟地。 通过与现有技术不同的上述接地方式，使用三相三线式连接方法形成三相四线式电能表。 结果，节省了三相电能测量装置所需的装置，从而降低了制造成本，同时消除了由三相不对称负载引起的测量误差，从而提高了测量精度。 此外，可以实现单相电流和单相电压的检测。

公开(公告)号：US08823359B2

公开(公告)日：2014-09-02

申请号：US13143318

申请日：2009-12-11

申请人： Zhigao Zhang ,  Zhishou Zheng ,  Qingchang Qu

发明人： Zhigao Zhang ,  Zhishou Zheng ,  Qingchang Qu

IPC分类号： G01R19/00 ,  G01R21/133 ,  G01R15/14 ,  G01R21/06

CPC分类号： G01R21/133 ,  G01R15/142 ,  G01R21/06

摘要： This disclosure relates to a three-phase electric energy measurement apparatus, comprising: a voltage detection unit for detecting voltage of each phase in power transmitting lines where the voltage detection unit is; a current detection unit for detecting current of each phase in the power transmitting lines where the current detection unit is; an electric energy calculation unit, connected to said voltage detection unit and said current detection unit, for receiving signals outputted from said voltage detection unit and said current detection unit, and performing signal processing and calculation, and then outputting a calculation result; wherein both said voltage detection unit and said electric energy calculation unit are connected in a star connection mode, forming a common virtual ground. Through the above-mentioned grounding manner different from that in the prior art, a three-phase four-wire electric energy meter is formed using a three-phase three-wire connection method. As a result, devices required by the three-phase electric energy measurement apparatus are saved, thereby reducing manufacture costs, and meanwhile, measurement errors due to asymmetrical loads of three phases are eliminated, thereby improving the measurement accuracy. Besides this, detection of single-phase current and single-phase voltage can be realized.

摘要翻译： 本公开涉及一种三相电能测量装置，包括：电压检测单元，用于检测电压检测单元所在的输电线路中的每相的电压; 电流检测单元，用于检测电流检测单元的电力传输线路中的各相的电流; 电能计算单元，连接到所述电压检测单元和所述电流检测单元，用于接收从所述电压检测单元和所述电流检测单元输出的信号，并执行信号处理和计算，然后输出计算结果; 其中所述电压检测单元和所述电能计算单元都以星形连接模式连接，形成公共虚拟地。 通过与现有技术不同的上述接地方式，使用三相三线式连接方法形成三相四线式电能表。 结果，节省了三相电能测量装置所需的装置，从而降低了制造成本，同时消除了由三相不对称负载引起的测量误差，从而提高了测量精度。 此外，可以实现单相电流和单相电压的检测。

公开(公告)号：USD995615S1

公开(公告)日：2023-08-15

申请号：US29805085

申请日：2021-08-25

申请人： Zhigao Zhang

设计人： Zhigao Zhang

摘要： FIG. 1 is a perspective view of a portable magnetic holder for camera showing my new design;
FIG. 2 is another perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a right side elevational view thereof;
FIG. 7 is a top plan view thereof; and,
FIG. 8 is a bottom plan view thereof.
The broken lines in the drawings depict portions of the portable magnetic holder for camera that form no part of the claimed design.