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:
May. 18, 2010
Filed:
Sep. 16, 2005
Masahiro Takada, Shizuoka, JP;
Toshihiko Ichinose, Nara, JP;
Katsumi Kozu, Hyogo, JP;
Takeshi Shimamoto, Osaka, JP;
Junko Shimamoto, Legal Representative, Osaka, JP;
Masahiro Takada, Shizuoka, JP;
Toshihiko Ichinose, Nara, JP;
Katsumi Kozu, Hyogo, JP;
Takeshi Shimamoto, Osaka, JP;
Junko Shimamoto, legal representative, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A power supply is provided, which is capable of stabilizing a generated output of the fuel cell using neither a voltage nor a current outputted from the fuel cell as a negative feedback signal. The power supply includes a fuel cell, a DC-DC converterthat adjusts a voltage outputted from the fuel cellaccording to a PWM signal and then outputs the voltage to a load device, a switching controllerthat generates the PWM signal and outputs this signal to the DC-DC converter, a voltmeterthat measures a voltage Vout outputted from the DC-DC converter, and a rechargeable batteryconnected to the load devicein parallel. The DC-DC convertercalculates a duty ratio of the PWM signal by performing a specific computation using the voltage Vout and a target fuel cell voltage Vt.