公开(公告)号：US11804793B2

公开(公告)日：2023-10-31

申请号：US17546563

申请日：2021-12-09

Applicant: DELTA ELECTRONICS, INC.

Inventor： Shao-Kai Tseng ,  Pai-En Cheng ,  Chen-Yeh Lee

IPC: H02P21/00 ,  H02P21/20 ,  H02P21/14

CPC classification number: H02P21/0017 ,  H02P21/143 ,  H02P21/20

Abstract: A method of speed control based on a self-learning model of load torque and a moment inertia is applied to a controller of controlling a motor. The method includes steps of: establishing a relationship between the load torque and the moment inertia by a self-learning manner, correspondingly acquiring a value of the moment inertia according to a value of the load torque, and adjusting parameters of the controller to control rotation of the motor according to the value of the moment inertia.

公开(公告)号：US11644506B2

公开(公告)日：2023-05-09

申请号：US17188190

申请日：2021-03-01

Applicant: DELTA ELECTRONICS, INC.

Inventor： Shao-Kai Tseng ,  Yuan-Qi Hsu ,  Pai-En Cheng

IPC: H02H3/08 ,  H02H9/02 ,  G01R31/327 ,  H02H1/00

CPC classification number: G01R31/3277 ,  H02H1/0007 ,  H02H3/08

Abstract: A fault detection method is used to determine whether a power switch coupled to a DC bus of a power conversion circuit is faulted. The method includes: detecting a bus voltage to provide a voltage signal and acquiring at least one detection value according to the voltage signal; providing control signals sequentially to turn off or turn on the power switch; determining that the power switch is a short-circuit fault if a first detection value is greater than or equal to a first threshold value when the power switch is turned off; determining that the power switch is an open-circuit fault if a second detection value is less than a second threshold value when the power switch is turned on; and providing an alarm signal or a disable signal when the power switch is the short-circuit fault or the open-circuit fault.