公开(公告)号：US12170497B2

公开(公告)日：2024-12-17

申请号：US17917395

申请日：2021-01-22

Applicant: Hitachi Astemo, Ltd.

Inventor： Toshiyuki Ajima ,  Takafumi Hara ,  Akihiro Ashida ,  Hirokazu Matsui ,  Kiyoshi Kuroda

IPC: H02P27/08 ,  B60L50/51 ,  B60L53/20 ,  H02M7/5395

Abstract: An inverter control device 200 includes a PWM control unit 220 that generates a PWM pulse for controlling an inverter 100, and a pulse edge control unit 250 that performs pulse edge control for correcting (shifting) a phase of a pulse edge of the PWM pulse generated by the PWM control unit 220. The PWM control unit 220 generates a PWM pulse by using a modulation rate based on a voltage command (Vd*, Vq*). The pulse edge control unit 250 corrects the PWM pulse so that a phase difference between a zero cross point where the modulation wave changes across 0 and a pulse edge of the PWM pulse falls within a predetermined range.

公开(公告)号：US12149183B2

公开(公告)日：2024-11-19

申请号：US17788659

申请日：2020-12-08

Applicant: HITACHI ASTEMO, LTD.

Inventor： Takafumi Hara ,  Toshiyuki Ajima ,  Akihiro Ashida ,  Kiyoshi Kuroda ,  Yoshinori Aoshima

IPC: H02P21/00 ,  B60L53/22 ,  H02M1/00 ,  H02M7/5387 ,  H02P21/22 ,  H02P27/08

Abstract: A deviation between a detection result of an output current of an inverter and an actual current is suppressed. A current detection unit 7 detects a three-phase AC current output from an inverter 3 or input to the inverter 3. An inverter control device 1 controls the inverter 3 based on a current detection value based on a detection result of the three-phase AC current by the current detection unit 7 and a predetermined current command value. The inverter control device 1 corrects the current detection value so as to correct a detection error of the three-phase AC current generated due to a delay time of a filter 72 which is a filter element provided in the current detection unit 7.