公开(公告)号：US06342791B1

公开(公告)日：2002-01-29

申请号：US09501243

申请日：2000-02-10

申请人： Kinya Ichikawa ,  Koichiro Kurata ,  Suteo Fujino ,  Chihiro Okado ,  Takatomo Izume ,  Yasuo Sakata

发明人： Kinya Ichikawa ,  Koichiro Kurata ,  Suteo Fujino ,  Chihiro Okado ,  Takatomo Izume ,  Yasuo Sakata

IPC分类号： G01R3126

CPC分类号： G01R31/2632 ,  G01R31/27

摘要： This invention is a diode defect detecting device including a current detector for detecting the primary current of a transformer, a comparator for comparing the detection current detected by the current detector with a current reference and outputting a reset signal if the detection current is larger than the current reference, an oscillator for generating a clock signal, a flip-flop circuit for receiving a set signal on the basis of a front and an end edge of the clock signal generated by the oscillator and receiving the output reset signal from the comparator, a polarity changing circuit for outputting a polarity changing signal for changing the polarities of the plurality of diodes on the basis of the output clock signal from the flip-flop circuit, and a determination circuit for calculating, in order to detect malfunctions of the plurality of diodes, any impedance change on the secondary side viewed from the primary side of the transformer on the basis of the pulse width of each polarity of the output clock signal from the flip-flop circuit.

摘要翻译： 本发明是一种二极管缺陷检测装置，其包括用于检测变压器的初级电流的电流检测器，用于将由电流检测器检测的检测电流与电流基准进行比较的比较器，并且如果检测电流大于 电流基准，用于产生时钟信号的振荡器，用于基于由振荡器产生的时钟信号的前沿和结束沿接收设置信号的触发器电路，并从比较器接收输出复位信号; 极性改变电路，用于根据来自触发器电路的输出时钟信号输出用于改变多个二极管的极性的极性改变信号;以及确定电路，用于计算，以便检测多个二极管的故障 基于每个p的脉冲宽度从变压器的初级侧观察的次级侧的任何阻抗变化 来自触发器电路的输出时钟信号的极性。