公开(公告)号：US11711028B2

公开(公告)日：2023-07-25

申请号：US17440533

申请日：2019-08-06

Applicant: LS ELECTRIC CO., LTD.

Inventor： Seung Cheol Choi ,  Hak Jun Lee

IPC: H02M7/5387 ,  H02P21/18 ,  H02P21/00 ,  H02P27/08

CPC classification number: H02M7/5387 ,  H02P21/0003 ,  H02P21/18 ,  H02P27/08

Abstract: Disclosed are an inverter control device and method. The method according to an embodiment of the present includes estimating a rotation speed of a motor, determining a slip frequency reference using an energy of a direct current terminal capacitor of an inverter, which provides an output voltage to the motor, and a direct current terminal energy reference when a direct current terminal voltage of the inverter is a certain level or less, and providing a frequency reference determined by adding the rotation speed of the motor and the slip frequency reference to the inverter.