公开(公告)号：WO2023081146A1

公开(公告)日：2023-05-11

申请号：PCT/US2022/048566

申请日：2022-11-01

Applicant: EMERSON CLIMATE TECHNOLOGIES, INC.

Inventor： MARCINKIEWICZ, Joseph G. ,  QIN, Mark ,  LAKHKAR, Nikhil R. ,  DZIUBA, Robert

IPC: F25B49/02 ,  H02P23/14 ,  H02P23/28 ,  H02P21/14 ,  H02P27/06

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.