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. 14, 2019
Filed:
May. 16, 2017
Qingdao Hisense Hitachi Air-conditioning Systems Co., Ltd., Qingdao, Shandong, CN;
Hisense Usa Corp., Suwanee, GA (US);
Xizhi Li, Qingdao, CN;
Yuping Deng, Qingdao, CN;
Xianlin Zhang, Qingdao, CN;
Shuliang Huang, Qingdao, CN;
Qingdao Hisense Hitachi Air-Conditioning Systems Co., Ltd., Qingdao, Shandong, CN;
Hisense USA Corp., Suwanee, GA (US);
Abstract
A drive control method for an electric expansion valve is disclosed. In the disclosure, before applying a drive pulse signal corresponding to a rotary pulse number to a motor of the electronic expansion valve, a secondary positioning is performed on a relative position between stator magnetic field of the motor and rotor magnetic field of the motor by applying a holding current of a first duration time to the motor, applying an pulse signal of an additional pulse number to the motor, and applying a holding current of a second duration time to the motor, and a same secondary positioning operation is also performed on the motor after applying the drive pulse signal corresponding to the rotary pulse number to the motor of the electronic expansion valve, which ensures that the electronic expansion valve operates according to the drive pulse signal corresponding to the rotary pulse number.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile