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:
Jul. 18, 2023
Filed:
Apr. 10, 2020
Hitachi, Ltd., Tokyo, JP;
Takeshi Shinomiya, Tokyo, JP;
Naoki Kunihiro, Tokyo, JP;
Kazutoshi Ogawa, Tokyo, JP;
Katsumi Ishikawa, Tokyo, JP;
Kuniaki Otsuka, Tokyo, JP;
Hiroyuki Shirata, Tokyo, JP;
Tomomi Kanazawa, Tokyo, JP;
Takeo Takagi, Tokyo, JP;
Shuichi Terakado, Tokyo, JP;
Kiyoshi Nakata, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
This three-phase AC motor drive device is provided with: a load; an inverter devicefor driving the load; an MCOK_A_connected between the inverter deviceand the load and electrically connecting or disconnecting the inverter deviceto or from the load; a voltage detectorhaving terminals respectively connected to the circuits of at least two phases to detect the voltages between the three phases; and a current detectorfor detecting the currents of the three phases. In the connection from the inverter deviceto the load, the inverter device, the MCOK_A_, the voltage detector, the current detector, and the load are aligned in this order.