公开(公告)号：US20220192049A1

公开(公告)日：2022-06-16

申请号：US17543859

申请日：2021-12-07

Applicant: Danfoss Power Electronics A/S

Inventor： Stefan Schroeder

IPC: H05K7/20 ,  H02P29/024

Abstract: The present invention pertains to a heatsink arrangement for a power converter, wherein the heatsink is grounded via a grounding capacitor. The invention also pertains to a power converter for driving an electric motor, including a corresponding heatsink, semiconductor switches mounted on the heatsink and a fluid cooling system.

公开(公告)号：US20240250517A1

公开(公告)日：2024-07-25

申请号：US18416451

申请日：2024-01-18

Applicant: Danfoss Power Electronics A/S

Inventor： Zhi Gao ,  Stefan Schroeder ,  Markus Sjoblom ,  Kenneth Dean

IPC: H02H5/04 ,  H02M7/00 ,  H02M7/537

CPC classification number: H02H5/047 ,  H02M7/537 ,  H02M7/003

Abstract: A method for providing thermal protection to a pre-charge unit (PRC) of an electric power conversion system, such as a medium-voltage adjustable-speed drive, with a step-up transformer and a DC link includes the steps of executing a parameter identification block identifying the electrical and thermal parameters of the PRC; of an electric power conversion system executing a current estimation block estimating the current flowing though the PRC's step-up transformer based on a voltage input; executing a thermal level estimation block estimating a thermal level at the PRC's step-up transformer based on the estimated current flowing though the PRC's step-up transformer; executing a protection logic block comparing the estimated thermal level to a pre-determined trip threshold to determine whether a thermal overload has occurred; and outputting a trip signal if the trip threshold has been exceeded. The disclosure further discloses an electric power conversion system, such as a medium-voltage adjustable-speed drive, with a step-up transformer and a DC link for executing a corresponding method.