公开(公告)号：US06211792B1

公开(公告)日：2001-04-03

申请号：US09373500

申请日：1999-08-13

申请人： Ivan Jadrić ,  Harold R. Schnetzka ,  Gregory K. Beaverson

发明人： Ivan Jadrić ,  Harold R. Schnetzka ,  Gregory K. Beaverson

IPC分类号： G08B2100

CPC分类号： H02H7/0844 ,  H02H7/0816

摘要： Methods and systems consistent with this invention detect a failed short thyristor in a solid-state controller for delivering power to a load during reduced-voltage operation. Methods and systems consistent with this invention detect a voltage across the thyristor, and indicate a failed short thyristor when the absolute value of the voltage across the thyristor remains below a threshold value during a predetermined period of time. Methods and systems consistent with this invention detect a failed open thyristor in a solid-state controller during full-voltage operation. Methods and systems consistent with this invention detect a voltage across the thyristor, and indicate a failed open thyristor when the absolute value of the voltage across the thyristor exceeds a threshold value.

摘要翻译： 与本发明一致的方法和系统检测固态控制器中的故障短晶闸管，用于在降压操作期间向负载输电。 与本发明一致的方法和系统检测晶闸管两端的电压，并且在预定时间段期间当晶闸管两端的电压的绝对值保持低于阈值时，指示故障的短晶闸管。 符合本发明的方法和系统在全电压操作期间检测固态控制器中的故障开路晶闸管。 与本发明一致的方法和系统检测晶闸管两端的电压，并且当晶闸管两端的电压的绝对值超过阈值时，指示失效的开路晶闸管。

公开(公告)号：US06462974B1

公开(公告)日：2002-10-08

申请号：US09963642

申请日：2001-09-27

申请人： Ivan Jadrić

发明人： Ivan Jadrić

IPC分类号： H02M7217

CPC分类号： H02M1/4216 ,  H02M5/293 ,  H02M2007/53876 ,  Y02B70/126

摘要： A system and method are provided for controlling a three-phase pulse-width-modulated alternating-current voltage regulator, in order to reduce inrush current when starting, for example, a large three-phase induction motor. The system and method include a set of four-quadrant switches connected in a converter circuit between the input voltage and the output load. By applying certain switching states in a determined sequence based on sensed values of the input voltage at the three lines, the system and method synthesize a three-phase variable magnitude output voltage from the three-phase input voltage of fixed magnitude.

摘要翻译： 提供了一种用于控制三相脉宽调制交流电压调节器的系统和方法，以便在启动例如大型三相感应电动机时减少浪涌电流。 该系统和方法包括在输入电压和输出负载之间连接在转换器电路中的一组四象限开关。 通过基于三行输入电压的感测值，以确定的顺序应用某些开关状态，该系统和方法从固定幅度的三相输入电压合成三相可变幅度输出电压。

公开(公告)号：US06459606B1

公开(公告)日：2002-10-01

申请号：US09963695

申请日：2001-09-27

申请人： Ivan Jadrić

发明人： Ivan Jadrić

IPC分类号： H02M5275

CPC分类号： H02M5/297

摘要： A method is provided for implementing a three-phase pulse-width-modulated alternating current voltage regulator including six four-quadrant switches, wherein each four-quadrant switch includes two two-quadrant switches. Three series branches, each series branch including one four-quadrant switch, and three shunt branches, each shunt branch including one four-quadrant switch, are provided. To obtain a desired converter state, the two-quadrant switches in the series and shunt branches are turned on or off in a predetermined sequence.

摘要翻译： 提供一种用于实现包括六个四象限开关的三相脉宽调制交流电压调节器的方法，其中每个四象限开关包括两个二象限开关。 提供三个串联分支，每个串联分支包括一个四象限开关，以及三个分流支路，每个分支支路包括一个四象限开关。 为了获得期望的转换器状态，串联和分流分支中的两象限开关以预定的顺序被导通或截止。

公开(公告)号：US06404346B1

公开(公告)日：2002-06-11

申请号：US09373501

申请日：1999-08-13

申请人： Ivan Jadrić ,  Harold R. Schnetzka

发明人： Ivan Jadrić ,  Harold R. Schnetzka

IPC分类号： G08B2100

CPC分类号： G01R31/263 ,  G01R31/343 ,  H02H7/0844

摘要： A method or system consistent with this invention for detecting if a thyristor failed open in an alternating current input phase of a load comprises measuring an instantaneous power delivered to the load during a cycle of the input; determining a peak power delivered to the load during the cycle of the input; calculating an average power delivered to the load during the cycle of the input; and determining if the thyristor failed open by comparing the magnitudes of the peak power and the average power.

摘要翻译： 根据本发明的用于检测在负载的交流输入阶段中晶闸管故障是否断开的方法或系统包括测量在输入周期期间递送给负载的瞬时功率; 确定在所述输入周期期间递送给所述负载的峰值功率; 计算在输入周期期间递送给负载的平均功率; 并通过比较峰值功率和平均功率的大小来确定晶闸管是否失效。