公开(公告)号：US20150340960A1

公开(公告)日：2015-11-26

申请号：US14719697

申请日：2015-05-22

Applicant: KABUSHIKI KAISHA YASKAWA DENKI

Inventor： Shigenori TAKAYAMA ,  Satoshi SUESHIMA ,  Keisei INOKI

IPC: H02M5/297

CPC classification number: H02M1/32 ,  H02H3/05 ,  H02H7/0844 ,  H02H7/1216 ,  H02M5/297

Abstract: A power conversion apparatus includes a power converter to directly convert AC power having a frequency into AC power having a different frequency. A gate driver drives the power converter. A gate drive signal generator generates a gate drive signal supplied to the gate driver. Two cutoff devices are coupled between the gate driver and the gate drive signal generator, and supply or cut off the gate drive signal to the gate driver based on a command from an external apparatus. At least one of the two cutoff devices generates a feedback signal. An analyzer determines whether the one cutoff device has an abnormality based on the command and the feedback signal. A cutoff controller controls another one of the two cutoff devices to cut off the gate drive signal to the gate driver when the analyzer determines that the one cutoff device has the abnormality.

Abstract translation: 电力转换装置包括电力转换器，用于将具有频率的AC电力直接转换成具有不同频率的AC电力。 门驱动器驱动电源转换器。 栅极驱动信号发生器产生提供给栅极驱动器的栅极驱动信号。 两个截止装置耦合在栅极驱动器和栅极驱动信号发生器之间，并且基于来自外部装置的命令将栅极驱动信号提供或切断到栅极驱动器。 两个截止装置中的至少一个产生反馈信号。 分析器基于该命令和反馈信号来确定一个截止装置是否具有异常。 当分析仪确定一个截止装置具有异常时，截止控制器控制两个截止装置中的另一个切断装置将栅极驱动信号切断到栅极驱动器。