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Shibata T.,Japan Institute of Electrical Engineers | Sudo K.,Business Management Division
Hitachi Review

OVERVIEW: Concern for the global environment and the desire to use energy more efficiently are driving growing demand for lithium-ion batteries in industrial applications as well as in consumer products and automobiles. Application of lithium-ion batteries in industry requires the technical skills to be able to use them correctly and this in turn requires a good understanding not only of the batteries but also of the equipment and systems (load) to which power is being supplied. In addition to the batteries themselves, Hitachi has an extensive involvement with a wide range of products and systems such as power plants that act as the loads in these systems. Hitachi is taking advantage of this technical background to lead the world in commercializing these industrial systems. Source

Seki H.,Japan Institute of Electrical Engineers | Otaguro T.,Business Management Division
Hitachi Review

Hitachi is seeking to focus its efforts on its Social Innovation Business by integrating the latest information and telecommunication systems technology with social infrastructure. Hitachi also sees battery and electric drive components as having a key role in supporting these products. The company has developed Harmonious Motor System for its electric drive business. Harmonious Motor System seeks to supply customers with the motor solution that best suits their needs. Simulation technology is being developed to perform an integrated analysis of the mechanical load and motor system for fast-response servo applications, while pulse harmonic modulation (PHM(b)) is being developed to boost the efficiency of vehicles by improving the efficiency of the motor, inverter, and battery as an integrated system. Hitachi is also strengthening its battery business targeted at industrial applications with automotive lithium-ion batteries playing a core role. It has also developed lead-acid batteries that have an expected life of 17 years when used to smooth fluctuations in wind power generation. Source

Oiwa T.,University of Shizuoka | Katsuki M.,Toshiba Machine Co. | Karita M.,Japan Institute of Electrical Engineers | Gao W.,Tohoku University | And 3 more authors.
International Journal of Automation Technology

Surveys on ultra-precision positioning held seven times since 1986 are summarized in this paper. According to questionnaires in these surveys, including the latest in 2010, averaged recognition of "precision" is 1 μm and of "ultra-precision" 10 nm. Although positioning accuracy currently appears to have reached the development limit, accuracy under 1 nm is expected to be attained. Demand for higher speed, greater acceleration, and longer stroke increasing yearly has made the linear motor drive more popular. Improved displacement sensor performance now regularly uses the linear scale unit for practical reasons. Environmental concerns have led to hydraulic actuators being increasingly replaced by electromagnetic actuators, thus saving lubricating oil. Source

Hiraiwa M.,Information and Telecommunication Systems Company | Masukawa H.,Network-1 | Nishimura S.,Japan Institute of Electrical Engineers
Hitachi Review

OVERVIEW: The adoption of cloud computing in IT systems is driving even greater diversity in network services. The requirements for the networks that support IT systems going cloud include ensuring the level of reliability required to make services available via the network, keeping data as secure as if it were stored in-house even when the siting of data centers has become borderless, and improving the energy efficiency of equipment including that used in data centers and networking facilities. Hitachi is working on the construction of networks that support the use of cloud computing for services that feature a high level of security and reliability and are capable of delivering responsive performance efficiently and with high availability. Source

Saito T.,Japan Institute of Electrical Engineers | Hirashima Y.,Systems Development Laboratory | Yamamura H.,Enterprise Systems | Yoshida T.,Air Conditioning System Group
Hitachi Review

OVERVIEW: Data centers house IT equipment centrally and run diverse IT services that form part of our social infrastructure, and factors such as their growing size and the increasing density of installed IT equipment have made the associated increase in power consumption a matter of concern around the world. It is believed that the solution to this problem can be found not only in reducing the power consumption of individual equipment but also through the coordinated control of all the equipment in the data center. Hitachi develops a range of different equipment and systems for data centers and in 2007 embarked on an "Environmentally Conscious Data Center Project" that draws on the overall capabilities of the Hitachi Group and an "IT Power-saving Plan" for reducing the power consumption of IT equipment. The major outcomes of this work to date have included the commercialization of a power supply unit for IT equipment and a spot cooling system that features natural circulation of the refrigerant. Future initiatives will include technology for collaborative control of IT and facilities which fits in with the overall aim of implementing center-wide control. Source

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