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. 01, 2012
Filed:
May. 22, 2007
Masaki Okamura, Toyota, JP;
Kiyotaka Matsubara, Ichinomiya, JP;
Shungo Tamura, Okazaki, JP;
Hiroki Ohtani, Aichi-gun, JP;
Hideo Nakai, Nisshin, JP;
Masaki Okamura, Toyota, JP;
Kiyotaka Matsubara, Ichinomiya, JP;
Shungo Tamura, Okazaki, JP;
Hiroki Ohtani, Aichi-gun, JP;
Hideo Nakai, Nisshin, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
It is determined that a periodic zero current stagnation state is reached to correct a voltage command of a smoothing capacitor downward by a predetermined voltage when a state where a current (reactor current) flowing through a coil in a dead time when switching elements are both off immediately after the switching element (upper arm) is turned off from on stagnates at a value of 0 occurs at switching periods of the switching elements. This can prevent a voltage of the smoothing capacitor from becoming unexpectedly higher than the voltage command in the current stagnation state, prevent the smoothing capacitor from being damaged by an overvoltage and prevent excessive torque from being output from motors.