Power transducer

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United States of America Patent

PATENT NO 8531140
APP PUB NO 20130127382A1
SERIAL NO

13747574

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Abstract

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The performance of a power transducer is improved while efficiently using a power semiconductor also by managing the permissible duty factor of the power semiconductor in the regenerative braking circuit provided in the power transducer. The user is allowed to set, through an operation panel provided on the power transducer, the resistance value of the regenerative braking resistor for thermally consuming the rotational energy generated during motor deceleration. The power transducer performs the steps of: calculating the current which flows in the regenerative braking circuit from the resistance value setting; obtaining the generation loss of the power semiconductor in the regenerative braking circuit with the calculated current value; and determining the permissible duty factor of the power semiconductor from the obtained generation loss.

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Patent Owner(s)

Patent OwnerAddress
HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO LTDCHIYODA-KU TOKYO 101-0022

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hiraga, Masahiro Yotsukaido, JP 25 231
Ibori, Satoshi Yachimata, JP 39 605
Uchino, Yoshihiro Yachiyo, JP 24 572
Watanabe, Hiroshi Sakura, JP 915 12785

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