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:
Feb. 16, 2016
Filed:
Jul. 26, 2012
Da Zhang, Manchester, CT (US);
Thomas Gietzold, Wethersfield, CT (US);
Subbarao Varigonda, Manchester, CT (US);
Salih Baris Ozturk, Manchester, CT (US);
Da Zhang, Manchester, CT (US);
Thomas Gietzold, Wethersfield, CT (US);
Subbarao Varigonda, Manchester, CT (US);
Salih Baris Ozturk, Manchester, CT (US);
CARRIER CORPORATION, Farmington, CT (US);
Abstract
A method of conducting smooth motor startup is provided and includes operating a motor in an open loop control scheme at startup, operating the motor in a closed loop sensorless control scheme at a time after startup and transitioning between the open loop control scheme and the closed loop control scheme by reducing a difference between an estimated rotor angle of the motor and a commanded ramping angle of the motor.