公开(公告)号：KR100693505B1

公开(公告)日：2007-03-14

申请号：KR1020050110370

申请日：2005-11-17

Applicant: 현대자동차주식회사 ,  학교법인 포항공과대학교

Inventor： 송홍석 ,  김성영 ,  오두용 ,  남광희

IPC: H02M7/529 ,  H02M7/48

公开(公告)号：KR100836313B1

公开(公告)日：2008-06-09

申请号：KR1020060127073

申请日：2006-12-13

Applicant: 현대자동차주식회사

Inventor： 송홍석 ,  주정홍 ,  이혁진 ,  한대웅 ,  전신혜 ,  이기종 ,  최원경 ,  박형준 ,  김준환 ,  남광희 ,  김성영

IPC: H02M3/335 ,  H02H7/12

Abstract: An apparatus and a method for diagnosing a breakdown of a DC-DC converter are provided to save cost for judging breakdowns of MOSFETs(Metal Oxide Semiconductor Field Effect Transistors) of the DC-DC converter. An apparatus for diagnosing a breakdown of a DC-DC converter includes a PWM(Pulse Width Modulation) pulse generator(123), a maximum current value sensing circuit(125), a similar integral circuit(127), and a breakdown diagnosing unit(129). The PWM generator applies a PWM pulse to MOSFETs of the DC-DC converter for several milliseconds before start-up of the DC-DC converter. The maximum current value sensing circuit senses a maximum value of a current flowing on a DC link terminal(134) of the DC-DC converter for several milliseconds when the PWM pulse is applied to the MOSFETs. The similar integral circuit determines a similar integral value by integrating the current flowing in the DC link terminal of the DC-DC converter. The breakdown diagnosing unit diagnoses the breakdowns of the MOSFETs by using a ratio between the maximum current value and the similar integral value.

Abstract translation: 提供用于诊断DC-DC转换器的击穿的装置和方法，以节省用于判断DC-DC转换器的MOSFET（金属氧化物半导体场效应晶体管）的击穿的成本。 用于诊断DC-DC转换器的故障的装置包括PWM（脉宽调制）脉冲发生器（123），最大电流值检测电路（125），类似的积分电路（127）和击穿诊断单元 129）。 在DC-DC转换器启动之前，PWM发生器将脉冲施加到DC-DC转换器的MOSFET几毫秒。 当PWM脉冲施加到MOSFET时，最大电流值感测电路感测在DC-DC转换器的DC链路端子（134）上流动几毫秒的电流的最大值。 类似的积分电路通过积分在DC-DC转换器的DC链路端子中流动的电流来确定类似的积分值。 故障诊断单元通过使用最大电流值和类似积分值之间的比率来诊断MOSFET的故障。