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:
Sep. 08, 1998
Filed:
Oct. 10, 1996
Sadao Shinohara, Wako, JP;
Tetsurou Shimohira, Wako, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
Before a motor contactor is turned ON, a pre-charge contactor is turned ON to charge a smoothing capacitor of an inverter. During this time, an increased rate of voltage of the capacitor is detected by a voltage sensor. When the increased rate exceeds a predetermined value, it is determined that the capacitor has deteriorated. After turning-OFF the motor contactor, a discharge contactor is turned ON, and the capacitor of the inverter is discharged. During this time, a decreased rate of voltage of the capacitor is detected by the voltage sensor. When the decreased rate exceeds a predetermined value, it is determined that the capacitor has deteriorated. Thus, it is possible to determine the deterioration of the smoothing capacitor mounted in the inverter in an electric vehicle without removing of the capacitor from the inverter.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile