The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 09, 2023
Filed:
Sep. 24, 2018
Johnson Controls Technology Company, Auburn Hills, MI (US);
Ajit W. Kane, York, PA (US);
Scott V. Slothower, Dillsburg, PA (US);
Johnson Controls Tyco IP Holdings LLP, Milwaukee, WI (US);
Abstract
A chiller assembly is provided. The chiller assembly includes a compressor (), a condenser (), an expansion device and an evaporator () connected in a closed refrigerant circuit. The chiller assembly further includes a motor () connected to the compressor to power the compressor, and a variable speed drive () 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.