公开(公告)号：US09602028B2

公开(公告)日：2017-03-21

申请号：US14061892

申请日：2013-10-24

Applicant: BAUMUELLER NUERNBERG GMBH

Inventor： Uwe Hensel ,  Magdi Dimas-Zekri ,  Axel Helmerth

IPC: H02P3/18 ,  G05B9/02 ,  H03K17/18 ,  H03K17/691 ,  H03K17/79

CPC classification number: H02P3/18 ,  G05B9/02 ,  H02P29/0241 ,  H02P2201/07 ,  H03K17/18 ,  H03K17/691 ,  H03K17/79

Abstract: An apparatus and a method actuate a frequency converter of an electric machine having a safety function, in particular a safe-torque-off (STO) function. Wherein, by a preferably clocked converter circuit, an electrically isolated output voltage is generated from an input voltage, from which output voltage a control signal is generated for the frequency converter for the operation thereof in accordance with standards and for triggering the safety function. An actuation signal is generated for a semiconductor switch which is periodically connected to the input voltage, and the output voltage is limited when the output voltage exceeds a switching threshold.