公开(公告)号：US10892698B2

公开(公告)日：2021-01-12

申请号：US15394165

申请日：2016-12-29

Applicant: DENSO CORPORATION

Inventor： Yasuaki Aoki ,  Yosuke Matsuki ,  Hideji Yoshida

IPC: H02P21/22 ,  G01R1/20 ,  G01R19/00 ,  H02P6/16 ,  H02P27/08

Abstract: In a current detection apparatus, an arm current detection unit detects each of at least first and second phase currents having respective amplitudes and flowing in a multiphase rotary electric machine based on a potential difference between input and output terminals of the corresponding one of first and second detection switches during the corresponding one of the first and second detection switches being on. A bus current detection unit detects each of at least bus-based first and second phase currents corresponding to the first and second phases of the multiphase rotary electric machine based on a current flowing through one of first and second buses. An amplitude correction unit corrects the first and second phase currents based on the bus-based first and second phase currents such that the amplitudes of the respective first and second phase currents match with each other.