公开(公告)号：KR20120070277A

公开(公告)日：2012-06-29

申请号：KR20100131770

申请日：2010-12-21

Applicant: KOREA ELECTRONICS TECHNOLOGY

Inventor： YOU SE HYUN ,  JUNG IN SOUNG ,  CHOI JUN HYUK ,  GU BON GWAN

IPC: G01R31/02 ,  G01R19/165

Abstract: PURPOSE: A short-circuit current detection circuit is provided to reduce the number of parts for detection by detecting short-circuit current of an inverter without connecting a separate watt resistance. CONSTITUTION: A short-circuit current detection circuit(100) detects voltage resulting from inductance components existing in positive or negative potential wiring of a three-phase inverter(15). The short-circuit current detection circuit comprises an amplification unit(110) and a comparison unit(120). The amplification unit amplifies the detected voltage to be applied to the comparison unit. The comparison unit compares the amplified voltage with reference voltage and outputs an off signal for a semiconductor power switching element of the three-phase inverter to a CPU(30).

Abstract translation: 目的：提供短路电流检测电路，通过检测逆变器的短路电流来减少检测的零件数量，而不需要连接单独的瓦特电阻。 构成：短路电流检测电路（100）检测由三相逆变器（15）的正或负电位布线中存在的电感分量产生的电压。 短路电流检测电路包括放大单元（110）和比较单元（120）。 放大单元放大要施加到比较单元的检测电压。 比较单元将放大的电压与参考电压进行比较，并将三相逆变器的半导体功率开关元件的截止信号输出到CPU（30）。