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. 30, 2024
Filed:
Mar. 17, 2023
Keita Yoshikawa, Tokyo, JP;
Kentaroh Kurosu, Kanagawa, JP;
Taichi Urayama, Kanagawa, JP;
Suguru Yokozawa, Kanagawa, JP;
Keita Yoshikawa, Tokyo, JP;
Kentaroh Kurosu, Kanagawa, JP;
Taichi Urayama, Kanagawa, JP;
Suguru Yokozawa, Kanagawa, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
A power supply device includes: a DC power supply that generates a DC voltage of a variable value and outputs the DC voltage; an AC power supply that generates an AC voltage of a variable value, and superimposes the AC voltage and the DC voltage to generate a superimposed voltage for output; and a control circuit. The control circuit start giving the DC power supply an instruction to output the DC voltage, and start giving the AC power supply an instruction to output the AC voltage for restricting output of the DC voltage. The control circuit controls an absolute value of the superimposed voltage to be smaller than or equal to a predetermined value in a predetermined period from a time when the giving of the instruction to output the AC voltage is started to a time when the restricting of the output of the DC voltage is started.