公开(公告)号：US09829534B2

公开(公告)日：2017-11-28

申请号：US14897160

申请日：2014-05-07

Applicant: Siemens Aktiengesellschaft

Inventor： Mark-Matthias Bakran

IPC: G01R31/27 ,  H03K17/18 ,  G01R31/327

CPC classification number: G01R31/27 ,  G01R31/3275 ,  H03K17/18

Abstract: A device for monitoring a power semiconductor switch includes a circuit section for applying to the power semiconductor switch an HF voltage having a frequency above a switching threshold of the power semiconductor switch, a shunt resistor for detecting an actual HF current resulting from application of the HF voltage to the power semiconductor switch, a monitoring circuit for comparing the actual HF current with an expected HF current that depends on a switching state of the power semiconductor switch when the HF voltage is applied to the power semiconductor switch, and a comparator for generating a power semiconductor status signal depending on a result of the comparison. A corresponding method for monitoring a power semiconductor switch of this type is also described.

公开(公告)号：US09748848B2

公开(公告)日：2017-08-29

申请号：US14434861

申请日：2012-10-11

Applicant: SIEMENS AKTIENGESELLSCHAFT

Inventor： Mark-Matthias Bakran ,  Hans-Joachim Knaak ,  Andre Schoen

IPC: H02M3/28 ,  H02M7/483 ,  H02M3/335

CPC classification number: H02M3/28 ,  H02M3/33584 ,  H02M2007/4835

Abstract: A DC converter is suitable for continuous operation for connecting high-voltage DC networks having different voltages. The DC converter has a first partial converter and a second partial converter, which are connected in series with each other, forming a converter series circuit. The converter series circuit extends between the DC terminals of a DC connection. The second partial converter extends between the DC terminals of a second DC connection. The first partial converter and the second partial converter are connected to each other via a power exchange device, such that the exchange of electrical power between the first partial converter and the second partial converter is made possible via the power exchange device.