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:
Feb. 07, 2023
Filed:
Apr. 28, 2020
Hitachi Industrial Equipment Systems Co., Ltd., Tokyo, JP;
Kazuaki Tobari, Tokyo, JP;
Agnes Hadinata, Tokyo, JP;
Atsuhiko Nakamura, Tokyo, JP;
Hiroshi Watanabe, Tokyo, JP;
Yusaku Onuma, Tokyo, JP;
Takuya Sugimoto, Tokyo, JP;
Yoshiyuki Taguchi, Tokyo, JP;
Hitachi Industrial Equipment Systems Co., Ltd., Tokyo, JP;
Abstract
This power conversion device comprises: a power converter including a switching element; and a control unit which controls the power converter. The control unit calculates a torque electric current detection value and an excitation electric current detection value from an electric current flowing to an external device, and when an absolute value of the torque electric current detection value is greater than or equal to the excitation electric current detection value, performs control such that the excitation electric current detection value follows the torque electric current detection value.