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公开(公告)号：US20220182006A1
公开(公告)日：2022-06-09
申请号：US17540595
申请日：2021-12-02
Applicant: Hitachi Astemo, Ltd.
Inventor： Yuta NAKAMURA , Masatoshi GOTO , Yoshinori SAGIYA , Kazunari KUROKAWA , Shugo UENO , Shintaro TAI
IPC: H02P29/028 , H02M1/32 , H02P27/06 , H02P29/024
Abstract: A control device that does not require arithmetic processing of a phase current can be provided. A control device in which a plurality of switching legs including a pair of semiconductor switching elements constituting an upper arm and a lower arm are provided in a number corresponding to the number of phases of a motor that is a load includes a switch short circuit detection unit configured to detect a short circuit failure of the semiconductor switching element, and a control unit configured to execute determination processing of determining whether the short circuit failure has occurred in the upper arm or the lower arm on the basis of a result of detection by the switch short circuit detection unit, and to set all the semiconductor switching elements that constitute an arm in which a short circuit failure has occurred on the basis of a result of the determination processing.
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公开(公告)号：US20240413750A1
公开(公告)日：2024-12-12
申请号：US18565129
申请日：2021-05-31
Applicant: Hitachi Astemo, Ltd.
Inventor： Yuji MIYATA , Yuta NAKAMURA , Masatoshi GOTO , Kazunari KUROKAWA , Yoshinori SAGIYA , Takuma KATO , Kazuya NAGASAWA
Abstract: The purpose of the present invention is to provide a power conversion device capable of further decreasing, compared to the prior art, misdetection of failures in a chopper circuit which constitutes phases. In order to achieve the foregoing, the present invention comprises: a multi-phase transformer circuit in which a plurality of chopper circuits are connected in parallel according to the number of phases; a drift detection unit which detects drift in a phase current in each chopper circuit; and a failure detection unit which variably sets a failure threshold value according to a state quantity of the chopper circuit, and which detects a failure in the chopper circuit by comparing the drift with the failure threshold value.
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公开(公告)号：US20220166305A1
公开(公告)日：2022-05-26
申请号：US17528731
申请日：2021-11-17
Applicant: Hitachi Astemo, Ltd.
Inventor： Masatoshi GOTO , Yuta NAKAMURA , Yoshinori SAGIYA , Kazunari KUROKAWA , Shugo UENO , Shintaro TAI
Abstract: A gate driving power source device can be miniaturized by sharing power source units, and a large current can be prevented from locally flowing in a single chip even when a short-circuit failure occurs in a multi-phase conversion circuit included in a power conversion device. There is provided a shared power source unit supplying a shared DC power source to a gate drive circuit provided in any one of a plurality of lower arms of multi-phase conversion circuits or any one of a plurality of upper arms of the multi-phase conversion circuit and gate drive circuits provided in upper arms or lower arms of other conversion circuits.
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