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:
Aug. 04, 1998
Filed:
Dec. 12, 1996
Applicant:
Inventor:
Eugene C Lee, Cupertino, CA (US);
Assignee:
SGS-Thomson Microelectronics Inc., Carrollton, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318811 ; 318254 ; 318439 ; 318138 ; 3889281 ;
Abstract
A method and a circuit for detecting zero crossing points for a brushless, sensorless, three-phase DC motor operated in a PWM mode. The circuit senses a BEMF signal in a floating coil and generates a first signal when the BEMF signal is separated from the center tap voltage by a selected offset voltage amount. The circuit overrides the PWM mode and drives a high side driving transistor to a conducting state until the zero crossing point is detected.
Quick Actions:
Lee, Eugene. (1998). Bemf crossing detection in pwm mode operation for sensorless motor (U.S. Patent No. 5789895). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5789895
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile