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:
Aug. 21, 2012
Filed:
Dec. 01, 2008
Hirokazu Iijima, Tokyo, JP;
Takuya Domoto, Tokyo, JP;
Takayuki Masaki, Tokyo, JP;
Hitachi Medical Corporation, Tokyo, JP;
Abstract
There is provided an inverter device that can detect short-circuit of a switching element of an inverter circuit even under a load condition that a PWM driving signal is very small. The inverter device is provided with means for independently supplying a short-circuit detecting PWM driving signal to respective switching elements Sto Sat different timings before the inverter circuitsupplies a PWM driving signal for supplying power to a high voltage generating device, successively turning on the respective switching elements Sto Swith the short-circuit detecting PWM driving signal, detecting on-voltages of the switching elements Sto Swhich are connected to the turned-on switching elements Sto Sin series, and detecting overcurrent or short-circuit states of the switching elements Sto S