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:
Jan. 23, 2018
Filed:
Mar. 19, 2015
Mitsubishi Electric Corporation, Tokyo, JP;
Masanori Kato, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
In a converter unit system, converter units are connected in parallel. The converter unit includes a converter circuit connected to an AC power supply and a DC bus, a first inrush-current suppression resistor connected to the DC bus, a first contactor connected in parallel to the first inrush-current suppression resistor, a smoothing capacitor provided after the first inrush-current suppression resistor and the first contactor, a second contactor externally outputting ON/OFF signal, a voltage detection unit measuring a DC voltage value across the smoothing capacitor, and a control unit controlling the first contactor and the second contactor. The converter unit system includes a third contactor connected to the converter units, and a second inrush-current suppression resistor connected in parallel to the third contactor. When contacts of the second contactors are all closed, a contact of the third contactor is closed.