US 12,294,290 B2
Controller for power converter
Ryoya Kazaoka, Kariya (JP); Yusuke Shindo, Kariya (JP); Shunichi Kubo, Kariya (JP); and Ken Toshiyuki, Kariya (JP)
Assigned to DENSO CORPORATION, Kariya (JP)
Filed by DENSO CORPORATION, Kariya (JP)
Filed on Sep. 25, 2023, as Appl. No. 18/372,307.
Application 18/372,307 is a continuation of application No. PCT/JP2022/011097, filed on Mar. 11, 2022.
Claims priority of application No. 2021-058794 (JP), filed on Mar. 30, 2021.
Prior Publication US 2024/0030803 A1, Jan. 25, 2024
Int. Cl. H02M 1/14 (2006.01); B60L 15/00 (2006.01); B60L 58/16 (2019.01); H02J 7/00 (2006.01); H02M 7/5395 (2006.01); H02P 21/22 (2016.01); H02P 27/08 (2006.01)
CPC H02M 1/14 (2013.01) [B60L 15/007 (2013.01); B60L 58/16 (2019.02); H02J 7/0047 (2013.01); H02M 7/5395 (2013.01); H02P 21/22 (2016.02); B60L 2210/40 (2013.01); H02P 27/08 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A controller for a power converter, comprising a frequency characteristics estimation part,
a ripple current setting part, and a control part, wherein
the power convertor comprises a power conversion unit and a capacitor, the power conversion unit comprises series-connected units, each of the series-connected units is composed of an upper arm side switching element and a lower arm side switching element, and the power conversion unit performs a switching control for converting a direct current power supplied from a battery to an alternating current power, and supplies the alternating current power to a rotating electric machine having windings, and the capacitor is connected in parallel with the series-connected unit, wherein
the frequency characteristics estimation part estimates frequency characteristics of a battery current flowing in the battery when a current is flowing between the power convertor and the battery,
the ripple current setting part determines a ripple frequency of a ripple current contained in the battery current based on the frequency characteristics of the battery current, and
the control part performs the switching control of the upper arm side switching element and the lower arm side switching element based on the ripple frequency of the ripple current determined by the ripple current setting part so as to generate the ripple current.