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:
Apr. 02, 2024
Filed:
Mar. 01, 2022
Rohm Co., Ltd., Kyoto, JP;
Hisashi Sugie, Kyoto, JP;
ROHM Co., LTD., Kyoto, JP;
Abstract
Disclosed herein is a control circuit of a three-phase DC motor used along with an external resistance and a three-phase inverter. The control circuit includes a current detection circuit that generates a first current detection value indicating an amount of current of a first current flowing through a first phase of the three-phase inverter. The current detection circuit can generate the first current detection value, based on a voltage drop of a resistance component of a wire existing on a path of the first current, the wire being formed from a material containing copper, or based on a voltage drop of a first resistance that is an on-resistance of an arm of the first phase, and can use, as a standard, a current detection value based on a voltage drop of the external resistance to calibrate the first current detection value based on the voltage drop of the first resistance.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile