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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2021/065761
Kind Code:
A current detection unit (30) has current detection elements (31-33) provided for respective phases on the high potential side of upper arm elements (21-23) or on the low potential side of lower arm elements (24-26). The upper arm elements (21-23) or the lower arm elements (24-26) on the side of which the current detection elements (31-33) are provided are set as elements to be detected, and the duty ratios of the elements to be detected are set as target duties. A control unit (60) has a current acquiring unit (70), an energization control unit (61), and an abnormality determination unit (65). The current acquiring unit (70) acquires a current detection value from the current detection unit (30). The abnormality determination unit (65) performs abnormality determination based on the current detection value. The abnormality determination unit (65) makes a determination threshold variable in accordance with the target duties, said determination threshold being used for the abnormality determination based on the current detection value.

NAKAMURA Kouichi (Showa-cho Kariya-cit, Aichi 61, JP)
NAKAZIMA Nobuyori (Showa-cho Kariya-cit, Aichi 61, JP)
ENDOH Go (Showa-cho Kariya-cit, Aichi 61, JP)
Application Number:
Publication Date:
April 08, 2021
Filing Date:
September 28, 2020
Export Citation:
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DENSO CORPORATION (Kariya-city Aichi, 61, JP)
International Classes:
H02P29/024; H02M7/48
Attorney, Agent or Firm:
HATTORI & PARTNERS (Arex BLDG. 4-12, Marunouchi 1-chome, Naka-ku, Nagoya-sh, Aichi 02, JP)
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