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公开(公告)号：US20200278141A1
公开(公告)日：2020-09-03
申请号：US16649852
申请日：2018-09-24
Applicant: Johnson Controls Technology Company
Inventor： Ajit W. Kane , Scott V. Slothower
Abstract: A chiller assembly is provided. The chiller assembly includes a compressor (102), a condenser (106), an expansion device and an evaporator (108) connected in a closed refrigerant circuit. The chiller assembly further includes a motor (104) connected to the compressor to power the compressor, and a variable speed drive (110) connected to the motor to power the motor. The variable speed drive is operable to provide a variable voltage to the motor and a variable frequency to power the motor. The variable speed drive includes multiple sensors and an input current estimator that determines an estimated RMS input current based on sensor data received from the sensors. The chiller assembly further includes a control panel to control operation of the variable speed drive.
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公开(公告)号：US11644226B2
公开(公告)日：2023-05-09
申请号：US16649852
申请日：2018-09-24
Applicant: Johnson Controls Technology Company
Inventor： Ajit W. Kane , Scott V. Slothower
CPC classification number: F25B49/025 , F25B49/022 , H02P27/06 , F25B2700/151
Abstract: A chiller assembly is provided. The chiller assembly includes a compressor (102), a condenser (106), an expansion device and an evaporator (108) connected in a closed refrigerant circuit. The chiller assembly further includes a motor (104) connected to the compressor to power the compressor, and a variable speed drive (110) connected to the motor to power the motor. The variable speed drive is operable to provide a variable voltage to the motor and a variable frequency to power the motor. The variable speed drive includes multiple sensors and an input current estimator that determines an estimated RMS input current based on sensor data received from the sensors. The chiller assembly further includes a control panel to control operation of the variable speed drive.
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