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    • 9. 发明授权
    • Electric energy meter
    • 电能表
    • US07974794B2
    • 2011-07-05
    • US11951625
    • 2007-12-06
    • Fuyuki Kurokawa
    • Fuyuki Kurokawa
    • G01R11/067G01R11/073G01R11/00G01R27/02
    • G01R22/065G01R15/202G01R33/072
    • An electric energy meter comprises a terminal unit and a measurement unit. The terminal unit includes plural electric lines each of which carries an electric current supplied from an external power source to a load, and a coil which is provided to at least one of the plural electric lines and converts the electric current flowing to the load into a magnetic field directly proportional to the electric current. The measurement unit includes a hall element which generates a voltage directly proportional to the magnetic field converted by the coil, a voltage detector which detects voltages of the plural electric lines, and a processing unit which calculates electric energy consumption based on the voltage generated by the hall element and the voltages detected by the voltage detector. The electric energy meter can facilitate the replacement.
    • 电能表包括终端单元和测量单元。 终端单元包括多个电线,每个电线承载从外部电源向负载供应的电流,以及线圈,其设置在多个电线中的至少一个上,并将流入负载的电流转换为 磁场与电流成正比。 测量单元包括产生与由线圈转换的磁场成正比的电压的霍尔元件,检测多条电线的电压的电压检测器,以及基于由该线圈产生的电压来计算电能消耗的处理单元 霍尔元件和电压检测器检测到的电压。 电能表可以方便更换。