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, 2003
Filed:
Nov. 14, 2001
Kazunari Moriya, Aichi-ken, JP;
Yukio Inaguma, Aichi-ken, JP;
Hideo Nakai, Aichi-ken, JP;
Hiroki Ohtani, Aichi-ken, JP;
Sumikazu Shamoto, Aichi-ken, JP;
Masayuki Komatsu, Aichi-ken, JP;
Shoichi Sasaki, Aichi-ken, JP;
Other;
Abstract
A direct-current power supply ( ) is connected between the neutral points of two three-phase coils ( ) of a 2Y motor ( ) constituted of the windings of the two three-phase coils ( ), which are connected in Y-connection and wound on a same stator, and to which three-phase alternating current power is severally supplied with a phase difference of a shifted angle between the windings from two inverter circuits ( ) having a positive pole bus ( ) and a negative pole bus ( ) for common use. A capacitor ( ) is connected between the positive pole bus ( ) and the negative pole bus ( ). The electric potential difference between the neutral points of the three-phase coils ( ) is made larger or smaller than the voltage of the direct-current power supply ( ) through the switching control of the inverter circuits ( ). Thereby, the capacitor ( ) can be charged or discharged. Consequently, an inverter input voltage can be adjusted within a wide range.