Toshiba Toko Meter Systems Co., Ltd.

Fuyuki Kurokawa

Mitsuhiro Sakoyama

Yoshito Sameda

Kenji Nakano

Yukio Takanohashi

Tadanori Maoka

Tatsuya Kimura

Shinichi Ryochi

Yuta Kuroki

A device including: a conductor through which a current to be measured flows; multiple coils arranged around the conductor; a first magnetic body provided to face one of end surfaces of each of the multiple coils and configured to magnetically short-circuit the multiple coils; and a second magnetic body provided to face another one of the end surfaces of each of the multiple coils, configured to magnetically short-circuit the multiple coils, and including through-holes through which coil wires from the multiple coils are passed, respectively, the through-holes being provided at positions facing the other end surfaces of the multiple coils, respectively.

Current detection device and electricity meter

In a watt-hour meter, encodersandrespectively convert a signal concerning a current and voltage used by a customer into a code sequence signal by Reed-Solomon codes or convolutional codes. Decoders, andreversely convert the code sequence signal to the signal concerning the current and voltage. A power calculating sectionconverts the signal concerning the current and voltage into data concerning electricity consumption.

Watt-hour meter

A current detector includes a plate conductor () that is folded in one portion in a longitudinal direction to have two parts parallel to and facing each other having a predetermined width (w) therebetween, so as to compose a looped current path () in the conductor, and a magneto-electric transducer () that is placed between the two parts of the conductor () so that a magnetic sensing axis is parallel to a width direction of the conductor (), of which a length (a) in a direction of the magnetic sensing axis is smaller than the width (w) of the conductor.

Current detector and wattmeter using the same

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.

Electric energy meter

An electricity meter capable of minimizing a risk of data destruction in case of lightning or surge that involves improperly high voltage is provided. The electricity meter includes a measurement part, an operation part, and an insulation part. The measurement part includes a detection unit to detect electricity consumption of an objective system and a transmission unit to wirelessly transmit data representative of the detected electricity consumption. The operation part includes a reception unit to receive the wirelessly transmitted data and an operation unit to process the received data into data representative of electric energy consumed by the objective system. The insulation part electrically insulates the measurement part and operation part from each other.

Growing community of inventors

Yokohama, Japan

Fuyuki Kurokawa