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. 17, 2016
Filed:
May. 19, 2014
Kabushiki Kaisha Toshiba, Minato-ku, Tokyo, JP;
Takahisa Kageyama, Ichikawa, JP;
Takashi Fujita, Tokyo, JP;
KABUSHIKI KAISHA TOSHIBA, Tokyo, JP;
Abstract
According to one embodiment, there is provided a variable speed control apparatus applied to a variable speed system of secondary excitation including a double feed synchronous machine and a frequency converter. The variable speed control apparatus includes a secondary current controller configured to control an output current from the frequency converter, and a secondary current limiter configured to limit an effective component current command and a reactive component current command of a secondary current for the secondary current controller by using a given secondary current limit value and output a limited result to the secondary current controller.