公开(公告)号：US20230146546A1

公开(公告)日：2023-05-11

申请号：US17453802

申请日：2021-11-05

Applicant: Emerson Climate Technologies, Inc.

Inventor： Joseph G. Marcinkiewicz ,  Mark Qin ,  Nikhil R. Lakhkar ,  Robert Dziuba

IPC: F25B49/02 ,  H02P29/68 ,  F25B13/00 ,  F25B31/02

CPC classification number: F25B49/025 ,  F25B13/00 ,  F25B31/02 ,  H02P29/68 ,  H02P2201/09 ,  H02P2201/15

Abstract: In other features, a refrigeration system is provided and includes a compressor motor, an inverter, a converter and a control module. The inverter is configured to convert a direct current (DC) bus voltage to an alternating current (AC) voltage and supply the AC voltage to the compressor motor. The converter is configured to convert a DC input voltage to the DC bus voltage. The control module is configured to obtain a parameter and in response to the parameter exceeding a predetermined threshold, reduce the DC bus voltage and at least one of (i) reduce a switching frequency, (ii) increase an amount of negative d-axis current of the compressor motor, or (iii) reduce a speed of the compressor motor.