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:
Oct. 07, 2014
Filed:
Jul. 08, 2010
Takashi Yamaguchi, Tokyo, JP;
Yugo Tadano, Tokyo, JP;
Toru Kakebayashi, Tokyo, JP;
Meidensha Corporation, Tokyo, JP;
Abstract
A motor drive device including a battery; switching elementsandwhich are connected in series with a condenser Chaving a voltage Vdc resulting from an increase action of battery voltage and which are operated in a chopper control; a reactor Lwhose one end is connected with a common connection point of the switching elementsand; and an inverterfor driving a PM motorwhich is connected between another end of the reactor Land a negative-pole terminal of the battery. In such a motor drive device, an electrical power W is determined based on the voltage Vdc of positive-side point P of the condenser C, a current Idc flowing in the reactor L, and a switching duty dof the switching elementwhich satisfies a condition of 0≦d≦1, i.e., is determined by calculating Vdc·d·Idc.