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:
Nov. 04, 2003
Filed:
Feb. 26, 2002
Applicant:
Inventors:
Yukio Kawabata, Hitachinaka, JP;
Tsunehiro Endo, Hitachiota, JP;
Makoto Ishii, Utsunomiya, JP;
Yuhachi Takakura, Oyama, JP;
Toru Inoue, Ohira, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 6/20 ; H02P 6/18 ;
U.S. Cl.
CPC ...
H02P 6/20 ; H02P 6/18 ;
Abstract
After the rotor position has been fixed prior to the start of a motor, the driving mode can be rapidly switched to sensorless driving and the motor can be started and controlled, by conducting current conversions in such a power supply pattern that increases the starting output torque of the motor, and controlling the inverter output voltage.
Kawabata, Yukio. (2003). Starting control method of and control apparatus for synchronous motor, and air conditioner, refrigerator, washing machine and vacuum cleaner each provided with the control apparatus (U.S. Patent No. 6642681). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6642681
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile