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:
Apr. 25, 2000
Filed:
Feb. 04, 1999
Kunio Tabata, Suwa, JP;
Minoru Kozaki, Suwa, JP;
Issei Yamakoshi, Suwa, JP;
Kunihiko Takagi, Suwa, JP;
Yoshikazu Koike, Suwa, JP;
Takeo Sato, Yokohama, JP;
Nobuki Sasaki, Yokohama, JP;
Atsushi Mizukoshi, Yokohama, JP;
Seiko Epson Corporation, Tokyo, JP;
Tokyo R & D Co., Ltd., Tokyo, JP;
Abstract
An electric motor vehicle having a drive system comprises a controller including an inverter device. The inverter comprises first and second series of semiconductor switches which is arranged in parallel with a power source. When a key switch provided between the power source and the first series of the semiconductor switches is open in a stop mode of the vehicle, a signal is given to a control terminal of only the second series of the semiconductor switches to prevent a short circuit of a main battery.