公开(公告)号：US10469020B2

公开(公告)日：2019-11-05

申请号：US15494839

申请日：2017-04-24

Applicant: DENSO CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Tomohisa Sano ,  Yuu Yamahira ,  Yoshihito Mizuno

IPC: H02P29/00 ,  H02P29/68 ,  H02M7/5387 ,  H02P27/06 ,  H05K7/20 ,  H02M3/158 ,  H02M1/088 ,  H02M1/00 ,  H02M1/32

Abstract: A power conversion apparatus includes a power conversion circuit and a control unit. The power conversion circuit converts electric power supplied from a power supply and outputs the converted electric power. The control unit controls the power conversion circuit. The power conversion circuit has at least one phase that is configured as a parallel-connection phase in which two semiconductor elements are connected in parallel to each other in each of an upper arm connected to a high potential-side wiring of the power supply and a lower arm connected to a low potential-side wiring of the power supply. The control unit detects temperature information related to element temperatures of all of the plurality of semiconductor elements of a target arm that is either of the upper arm and the lower arm of the parallel-connection phase, and performs overheating protection control of the power conversion circuit based on the detected temperature information.

公开(公告)号：US09774215B2

公开(公告)日：2017-09-26

申请号：US15014491

申请日：2016-02-03

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Yoshihito Mizuno

IPC: H02J9/06 ,  B60L11/18 ,  H02J1/10 ,  H02J7/14

CPC classification number: H02J9/06 ,  B60L3/003 ,  B60L3/0092 ,  B60L3/04 ,  B60L11/18 ,  H02J1/10 ,  H02J7/1423 ,  Y02T10/7022 ,  Y10T307/729

Abstract: A capacitor connected to the battery in parallel; a step-up converter connected to the battery and the first capacitor; another capacitor connected to the step-up converter in parallel; an inverter connected to the step-up converter and the other capacitor in parallel; a potential line connecting a negative-side terminal of the battery to the capacitor, the step-up converter, the other capacitor, and the inverter in the stated order; and a bypass path formed, when a lower arm switching device of the step-up converter has a short-circuit failure, from cutting the reference electric potential line at a position including at least any one of a position between the negative-side terminal and the capacitor and another position between the step-up converter and the other capacitor. The bypass path bypasses the lower arm switching device and connects the negative-side terminal to the inverter.