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:
Dec. 31, 2013
Filed:
Oct. 18, 2011
Koji Hachiya, Kasugai, JP;
Yusaku Ido, Kani, JP;
Yasumichi Omoto, Kasugai, JP;
Omron Automotive Electronics Co., Ltd., Aichi, JP;
Abstract
A system simplification can be achieved by reducing the number of sensors required to detect currents and voltages when an output current is estimated. A switching power supply deviceincludes a current transformer, a switching circuit, a rectifying circuit, a smoothing circuit, an input voltage detecting circuit, a control part, an output voltage detecting circuitand a PWM signal generating part. The control partcalculates a duty rate and an average value of voltage of the secondary side voltage of the current transformerdetected by the input voltage detecting circuitbased on a waveform of the detected voltage. The control partcalculates an output current lo based on the calculated duty rate, the calculated average value of voltage and an output voltage Vo detected by the output voltage detecting circuit