US 12,143,099 B2
Switching element driving method and switching element driving device
Yuka Okuyama, Kanagawa (JP); Kazushige Namiki, Kanagawa (JP); and Keita Abe, Kanagawa (JP)
Assigned to Nissan Motor Co., Ltd., Kanagawa (JP)
Appl. No. 18/043,437
Filed by Nissan Motor Co., Ltd., Kanagawa (JP)
PCT Filed Aug. 28, 2020, PCT No. PCT/JP2020/032779
§ 371(c)(1), (2) Date Feb. 28, 2023,
PCT Pub. No. WO2022/044298, PCT Pub. Date Mar. 3, 2022.
Prior Publication US 2023/0327658 A1, Oct. 12, 2023
Int. Cl. H02M 1/088 (2006.01); H02M 7/539 (2006.01); H03K 17/14 (2006.01)
CPC H03K 17/14 (2013.01) [H02M 1/088 (2013.01); H02M 7/539 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A switching element driving method executed in a switching element driving device including a plurality of switching elements distributed in different phases and a driving circuit configured to drive the plurality of switching elements, the switching element driving method comprising:
detecting a plurality of temperatures of at least one switching element of the plurality of switching elements included in each of the phases;
calculating a minimum value among the plurality of detected temperatures as a switching determination temperature that serves as a reference for changing switching speeds of the switching elements; and
decreasing the switching speeds of all of the switching elements if the switching determination temperature is equal to or lower than a predetermined threshold.