Tdk Corporation

Adrian Lo

Naoki Hanashima

Kenjiro Hata

Tohru Kineri

Masafumi Kami

Takashi Osada

Makoto Sekijima

Takahiro Hamamura

Jun Hirabayashi

Makoto Sekijma

Disclosed herein is a current sensor that includes a bus bar and a magnetic sensor. The bus bar includes first and second cylindrical structure parts which are coaxially arranged, and a sensing part disposed in a hollow area surrounded by the first and second cylindrical structure parts. The magnetic sensor is disposed in the hollow area. The bus bar is configured to branch current to be measured into the first cylindrical structure part and sensing part and to make at least part of a current component of the current to be measured that flows in the first cylindrical structure part in one direction flow in the second cylindrical structure part in an opposite direction to the one direction.

Current sensor

Disclosed herein is an inductance element for a magnetic sensor. The inductance element includes a first core comprising a first soft magnetic material and having first and second connecting surfaces, a second core comprising a second soft magnetic material different from the first soft magnetic material and having third and fourth connecting surfaces facing the first and second connecting surfaces, respectively, and a coil wound around the first core between the first and second connecting surfaces, wherein the first core is larger in magnetic field strength at which magnetic saturation occurs than the second core, and wherein the second core is higher in permeability than the first core and has at least partially a meander shape.

Inductance element for magnetic sensor and current sensor including the same

Disclosed herein is a magnetic sensor including: a first core made of a first soft magnetic material, the first core having first and second connection surfaces; a second core made of a second soft magnetic material different from the first soft magnetic material, the second core having a third connection surface facing the first connection surface and a fourth connection surface facing the second connection surface; and a coil wound around the first core between the first connection surface and the second connection surface. The first core reaches magnetic saturation at a higher magnetic field intensity than that of the second core, and the second core has a higher magnetic permeability than that of the first core.

Magnetic sensor and current sensor including the same

The optical module includes a main housing, a filter support component, which can affix an optical fiber, supported by a first attachment section, a light-emitting component supported by a second attachment section, a light-receiving component supported by a third attachment section, and first and second optical filters supported by a filter support component. The filter support component has a first surface and a second surface. The first optical filter is mounted on the first surface of the filter support component. The second optical filter is mounted on the second surface of the filter support component.

Optical module for bi-directional communication system

The optical module includes a main housing, a light-emitting component supported by a second attachment section, a light-receiving component and a filter support member supported by a third attachment section, and first and second optical filters supported by the filter support member. The filter support member has a first surface and a second surface. The first optical filter is mounted on the first surface of the filter support member. The second optical filter is mounted on the second surface of the filter support member.

The optical module includes a main housing to which the optical fiber can be attached and a light-emitting component and a light-receiving component attached to the main housing. At least a part of a surface of the main housing has an irregular pattern to enhance a thermal dissipation. Because at least part of the main housing comprises a heat sink, so the optical module itself has a very high heat dissipation property, eliminating the type of problems that arise when adhesive or the like is used to attach to the main housing heat sinks constituted as separate parts, such as the increase in the number of parts and the degradation in thermal conductivity to the heat sink caused by the adhesive.

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Tokyo, Japan

Adrian Lo