US 12,149,183 B2
Inverter control device and electric vehicle system
Takafumi Hara, Tokyo (JP); Toshiyuki Ajima, Tokyo (JP); Akihiro Ashida, Hitachinaka (JP); Kiyoshi Kuroda, Hitachinaka (JP); and Yoshinori Aoshima, Hitachinaka (JP)
Assigned to HITACHI ASTEMO, LTD., Hitachinaka (JP)
Appl. No. 17/788,659
Filed by HITACHI ASTEMO, LTD., Hitachinaka (JP)
PCT Filed Dec. 8, 2020, PCT No. PCT/JP2020/045573
§ 371(c)(1), (2) Date Jun. 23, 2022,
PCT Pub. No. WO2021/131658, PCT Pub. Date Jul. 1, 2021.
Claims priority of application No. 2019-239900 (JP), filed on Dec. 27, 2019.
Prior Publication US 2023/0035063 A1, Feb. 2, 2023
Int. Cl. H02P 21/00 (2016.01); B60L 53/22 (2019.01); H02M 1/00 (2006.01); H02M 7/5387 (2007.01); H02P 21/22 (2016.01); H02P 27/08 (2006.01)
CPC H02M 7/53871 (2013.01) [B60L 53/22 (2019.02); H02M 1/0009 (2021.05); H02P 21/22 (2016.02); H02P 27/08 (2013.01); B60L 2210/40 (2013.01)] 5 Claims
OG exemplary drawing
 
1. An inverter control device that controls an inverter based on a current detection value, obtained based on a detection result of an AC current by a current detection unit that detects the AC current output from the inverter or input to the inverter, and a predetermined current command value, the inverter control device comprising
a correction unit that corrects either the current detection value or the current command value to correct a detection error of the AC current generated due to a delay time of a filter element provided in the current detection unit,
wherein the correction unit computes a correction current value based on a modulation rate or a voltage utilization rate of the inverter, a switching frequency of the inverter, a DC voltage applied to the inverter, and the delay time of the filter element,
wherein the correction unit inverts a sign of the correction current value in accordance with whether operation of the inverter is in a power running region or a regeneration region, and
wherein the correction unit corrects either the current detection value or the current command value by computing a correction gain based on the correction current value and an amplitude of the AC current, and multiplying the current detection value or the current command value by the correction gain.