Hasuda, Japan
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Mori Y.,TAKAOKA TOKO CO. | Furuya S.,Saitama Institute of Technology | Tanaka S.-I.,Japan Central Research Institute of Electric Power Industry
IEEJ Transactions on Power and Energy | Year: 2016

The high current and energy technologies are widely utilized in various fields. For example, they are needed for the transportation and control of the high power in the electric power field, the generation of a state of high energy density in the industrial field, and so on. Furthermore, a high functionalization of the technologies is also progressing as well as an expansion of each field which the technologies are applied. In this review paper, we introduce the latest trends in the high current and energy technologies, with focusing on elemental advancements and applications in the fields of electric power and energy, industrial application, traffic, and medical care. © 2016 The Institute of Electrical Engineers of Japan.


Nagata K.,TAKAOKA TOKO Co. | Ohyama T.,TAKAOKA TOKO Co. | Sato H.,Japan Central Research Institute of Electric Power Industry | Ito T.,Tokyo Electric Power Company | And 2 more authors.
IEEJ Transactions on Power and Energy | Year: 2015

We developed the 550 kV disconnectors that strengthened earthquake proofing by the addition of the damper unit and weight reduction of conductive part based on the damage of the 550 kV disconnectors by the Great East Japanearthquake (March 11, 2011) and inspected the earthquake proofing performance by shake table test. In shake table test, we performed the test by the artificial seismic wave that varied in phase characteristic in addition to the test byresonance method. And, in a high-level earthquake area, we analyzed it about the influence that a phase characteristic of the artificial seismic wave gave to stress to occur in disconnectors. As a result, it is thought that the stress tooccur in disconnectors is decided by a primary natural frequency basically because a bending strain to occur to the disconnectors in the time when the resonance frequency ingredient becomes the big acceleration response value growsbig. But, on a particular phase condition, it was confirmed that the bending strain to occur in disconnectors might grow big conspicuously. As for this, the possibility is thought about by influence of higher natural frequency doingsuperposition. © 2015 The Institute of Electrical Engineers of Japan.


Nagata K.,TAKAOKA TOKO Co. | Ohyama T.,TAKAOKA TOKO Co. | Sato H.,Japan Central Research Institute of Electric Power Industry | Ito T.,Tokyo Electric Power Company | And 2 more authors.
Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi) | Year: 2016

We developed the 550-kV disconnectors that strengthened earthquake proofing by the addition of the damper unit and weight reduction of conductive part based on the damage of the 550-kV disconnectors by the Great East Japan earthquake (March 11, 2011) and inspected the earthquake proofing performance by shake table test. In shake table test, we performed the test by the artificial seismic wave that varied in phase characteristic in addition to the test by resonance method. And, in a high-level earthquake area, we analyzed it about the influence that a phase characteristic of the artificial seismic wave gave to stress to occur in disconnectors. As a result, it is thought that the stress to occur in disconnectors is decided by a primary natural frequency basically because a bending strain to occur to the disconnectors in the time when the resonance frequency ingredient becomes the big acceleration response value grows big. But, on a particular phase condition, it was confirmed that the bending strain to occur in disconnectors might grow big conspicuously. As for this, the possibility is thought about by influence of higher natural frequency doing superposition. © 2016 Wiley Periodicals, Inc.


Sumiyama K.,Tokyo Denki University | Kurokawa Y.,Nagoya Institute of Technology | Kurokawa Y.,Toyota Technological Institute | Yamada H.,Tokyo Denki University | And 4 more authors.
Materials Transactions | Year: 2016

SnCSnSi1-CSn alloy films (cSn: the chemical composition) have been prepared by rf sputter-deposition. X-ray diffraction measurement indicate that almost pure bct Sn and amorphous Si phases coexist for 0.28 ≤ cSn < 1.0. The electrical resistivity (p) measurement indicate that the alloy films are semiconducting above 10 K for cSn ≤ 0.47 and metallic for cSn ≥ 0.57, whereas they are superconducting below 4 K for cSn ≥ 0.38. When cSn is transformed to the volume fraction, vSn, the electrical conductivity, σ versus vSn plot shows clear inflection at around vSn = 0.41. This semiconductor to metal transition threshold (vp ≅ 0.41) is much larger than 0.16 for the 3 dimensional site percolation theory, 0.21∼0.25 for the partially coalesced Sn-core/Si-shell cluster assemblies and 0.33 for the effective medium theory, but smaller than 0.5 for the granular materials in which metal grains are heavily coated by small insulator grain layers. Temperature dependence of p also reveals a transition from a simple energy gap type conduction to a thermally assisted electron tunneling type one with increasing vSn. © 2016 The Japan Institute of Metals and Materials.


Kanda K.,TAKAOKA TOKO Co. | Ohyama T.,TAKAOKA TOKO Co. | Nagata K.,TAKAOKA TOKO Co. | Ito T.,Tokyo Electric Power Company | And 2 more authors.
IEEJ Transactions on Power and Energy | Year: 2015

The operation insulator part of a 550-kV disconnector has a middle universal joint which generates a nonlinear oscillation. Since the nonlinear oscillation characteristic of the middle universal joint was not clear, test device of theoperation insulator was created and the nonlinear oscillation characteristic was clarified by the vibration test. Moreover, the Finite Element Method (FEM) model of an operation insulator part is proposed and it calculated in nonlinearanalysis. Comparison examination of a measurement result and a calculation result was performed. © 2015 The Institute of Electrical Engineers of Japan.


Ohyama T.,TAKAOKA TOKO Co. | Nagata K.,TAKAOKA TOKO Co. | Kanda K.,TAKAOKA TOKO Co. | Ito T.,Tokyo Electric Power Company | And 2 more authors.
IEEJ Transactions on Power and Energy | Year: 2015

In the disconnecting switch of 300 kV or less single pole structure, the Great East Japan Earthquake received much damage at the former by the rotation insulator base metal which damage experience had. Conventionally, we carriedout a simple desk evaluation about earthquake-proof evaluation of insulator base metal. However, there is deviation with the damage actual condition and it became clear that it was an apparatus weak point part. Then, we worked onthe analysis accuracy improvement of insulator base metal, and we built the analysis technology of the single pole structure disconnecting switch. © 2015 The Institute of Electrical Engineers of Japan.


Hishikawa Y.,Japan National Institute of Advanced Industrial Science and Technology | Yamagoe K.,Japan National Institute of Advanced Industrial Science and Technology | Onuma T.,Takaoka TOKO Co.
2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015 | Year: 2015

PV module characterization by non-contact electrostatic potential measurement method is investigated. The method can be carried out by a portable equipment under various outdoor operating conditions as well as in laboratories. The electric potential of the cells in various crystalline silicon and thin film PV modules can be determined in a noncontact configuration such as through their cover glass and backsheet. Basic repeatability of the electrostatic voltage measurement was confirmed to be within about ±0.5 V for indoor measurements, which is better than the output voltage of a component cell. The repeatability was typically within the voltage corresponding to 2 to 3 times the component cells even under changeable outdoor conditions. The present study demonstrates that the method is applicable to PV module characterization, such as identifying a hotspot cell in a PV module and determining degraded modules in a PV array, through monitoring the distribution of their electric potential under outdoor conditions without interrupting the grid-connected operation of the system. © 2015 IEEE.


Ohyama T.,TAKAOKA TOKO Co. | Nagata K.,TAKAOKA TOKO Co. | Kanda K.,TAKAOKA TOKO Co. | Ito T.,TAKAOKA TOKO Co. | And 2 more authors.
Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi) | Year: 2016

In the disconnecting switch of 300 kV or less single pole structure, the Great East Japan Earthquake received much damage at the former by the rotation insulator base metal which damage experience had. Conventionally, we carried out a simple desk evaluation about earthquake-proof evaluation of insulator base metal. However, there is deviation with the damage actual condition and it became clear that it was an apparatus weak point part. Then, we worked on the analysis accuracy improvement of insulator base metal, and we built the analysis technology of the single pole structured disconnecting switch. © 2016 Wiley Periodicals, Inc.


Trademark
Takaoka Toko Co. | Date: 2016-02-09

Ozonisers; electrolysers; electricity meters, namely, energy meters for tracking and monitoring energy usage; circuit breakers; battery chargers for electric vehicles; electric transformers; electric switches; electric circuit closers; electrical power distribution units; electric inverters; electric capacitors; downloadable electronic publications in the nature of manuals in the field of electrical products.


Patent
Takaoka Toko Co. | Date: 2014-12-09

According to one embodiment, a continuous scan type measuring apparatus includes a continuous scan type optical application measuring instrument, a single-axis measuring instrument scanning stage and two carrier stages. The continuous scan type optical application measuring instrument performs a surface shape measurement of a measuring object. The single-axis measuring instrument scanning stage carries the optical application measuring instrument and causes the optical application measuring instrument to perform continuous scanning along a predetermined direction. The two carrier stages are detachably mount respective measuring objects thereon and move independently of each other. The two carrier stages are positioned independently at one of a measurement position within a scanning range of the optical application measuring instrument and a replacement position of the measuring objects. A carrier stage, which is at the measurement position and on which the measuring object subjected to the surface shape measurement is mounted, is fixed during the continuous scanning.

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