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:
Jul. 21, 2020
Filed:
Mar. 26, 2018
Brother Kogyo Kabushiki Kaisha, Nagoya-shi, Aichi-ken, JP;
Katsumi Inukai, Iwakura, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya-shi, Aichi-ken, JP;
Abstract
An AC voltage detection device has a rectifying circuit configured to rectify an AC voltage output from an AC power source, a voltage-pulse conversion circuit configured to convert a rectified voltage rectified in the rectifying circuit to a first pulse signal having a period shorter than a half of a period of the AC voltage, a pulse transmission circuit configured to perform signal transmission with electrical insulation by converting the first pulse signal to a physical signal other than an electrical signal and converting the physical signal to a second pulse signal being an electrical signal, and a controller to which the second pulse signal is input. The controller calculates the voltage value of the AC voltage from a characteristic value of the second pulse signal.