公开(公告)号：US20120050922A1

公开(公告)日：2012-03-01

申请号：US13213274

申请日：2011-08-19

申请人： Hiroyuki YAMAI ,  Yasuo Noto ,  Yoshio Akaishi ,  Kohei Myoen

发明人： Hiroyuki YAMAI ,  Yasuo Noto ,  Yoshio Akaishi ,  Kohei Myoen

IPC分类号： H02H7/08

CPC分类号： G01R31/02 ,  H02M7/537 ,  H02M2001/0009 ,  H02P29/032

摘要： According to the present invention, an overcurrent fault detection device includes: an inverter converting DC current to three-phase AC currents for driving a motor; a DC voltage detector; phase current detectors; a rotational position detector that detects a rotational angle of the motor; a control circuit that controls a gate drive circuit, which controls the inverter at every predetermined cycle, based upon the phase current values, a motor rotational angle detection value, and a speed command or a torque command from a higher-order control device; and a first decision-making circuit that detects an overcurrent based upon the phase current values at every predetermined cycle, wherein: the first decision-making circuit determines whether or not the phase current values exceed a predetermined amplitude threshold value by frequency detection for any of the phase current values exceeding the predetermined amplitude threshold value, and determines that an overcurrent has occurred upon detecting the frequency.

摘要翻译： 根据本发明，过电流故障检测装置包括：逆变器，将直流电流转换成用于驱动电动机的三相交流电流; 直流电压检测器; 相电流检测器; 旋转位置检测器，其检测所述电动机的旋转角度; 控制电路，其基于来自上位控制装置的相电流值，电动机旋转角度检测值，速度指令或转矩指令，控制以每隔一定周期控制逆变器的栅极驱动电路; 以及第一决策电路，其基于每个预定周期的相电流值来检测过电流，其中：所述第一判定电路通过频率检测来确定所述相电流值是否超过预定振幅阈值 相电流值超过预定振幅阈值，并且在检测到频率时确定已经发生过电流。

公开(公告)号：US20110084704A1

公开(公告)日：2011-04-14

申请号：US12862221

申请日：2010-08-24

申请人： Kohei Myoen ,  Hiroyuki YAMAI

发明人： Kohei Myoen ,  Hiroyuki YAMAI

IPC分类号： G01R31/04

CPC分类号： B60L3/12 ,  H02H9/001

摘要： A power supply device includes: a power supply; a first contactor and a second contactor that are connected between the power supply and a load; a voltage detection circuit that detects a voltage between a load side of the first contactor and a power supply side of the second contactor; and a control unit that sets the contactors to an open/closed state. In a state in which electrical power has not been supplied to the load, a voltage which is greater than zero and less than a voltage at the power supply is applied between a positive electrode and a negative electrode on the load side; and after controlling the contactors to an open state, the control unit makes a decision as to whether or not one of the contactors is welded based upon detection results of the voltage detection circuit.

摘要翻译： 电源装置包括：电源; 连接在电源和负载之间的第一接触器和第二接触器; 电压检测电路，其检测所述第一接触器的负载侧和所述第二接触器的电源侧之间的电压; 以及将接触器设定为开/关状态的控制单元。 在没有向负载供电的状态下，在负载侧的正极和负极之间施加大于零并且小于电源电压的电压; 并且在将接触器控制到打开状态之后，基于电压检测电路的检测结果，控制单元判定接触器中的一个是否被焊接。