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公开(公告)号：US07016207B2
公开(公告)日：2006-03-21
申请号：US10482387
申请日：2002-06-26
IPC分类号： H02M3/24 , H02M7/5387
摘要： In a power converting apparatus including a capacitor connected in series which serves to divide a DC voltage, and a PWM inverter bridge for converting the DC voltage into an AC phase voltage having three electric potentials of a positive voltage, a negative voltage and an intermediate voltage in a plurality of phases, a zero voltage period generator (11) is switched by signal switching devices (5 to 10) when a load current reaches a first overcurrent level based on the detection of an overcurrent detector (12), and there is provided a zero voltage period having an intermediate voltage in which output phase voltages having all phases of the power converting apparatus become the intermediate voltages, thereby carrying out a current limitation. With an inexpensive structure, consequently, a rapidly increased current in an inverter can be instantaneously suppressed at time of the detection of an overcurrent.
摘要翻译： 在包括用于分压DC电压的串联连接的电容器的电力转换装置中，以及用于将DC电压转换为具有正电压，负电压和中间电压三个电位的AC相电压的PWM逆变桥 在多相中，基于过电流检测器（12）的检测，当负载电流达到第一过电流电平时，通过信号切换装置（5〜10）切换零电压周期发生器（11） 具有中间电压的零电压周期，其中具有电力转换装置的所有相的输出相电压变为中间电压，由此进行电流限制。 由于廉价的结构，因此可以在检测到过电流时瞬时抑制逆变器中的快速增加的电流。
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公开(公告)号：US5821844A
公开(公告)日：1998-10-13
申请号：US693204
申请日：1996-08-05
CPC分类号： H01F37/00 , H01F29/146 , H01F2003/103
摘要： A D.C. reactor has a core structure having two opposed cores separated by a magnetic gap, to form a closed magnetic circuit. A coil is wound on one or both of the cores. A pair of permanent magnets for biasing are disposed on the core structure. The bias flux generated by the permanent magnets and the flux generated by the coil to flow in opposite directions. Bypass means for causing the bias flux generated by the permanent magnets to bypass the magnetic gap are provided. In an embodiment the core structure comprises an E-shape core and an I-shaped core, the magnetic gap is defined between a center leg of the E-shaped core and the I-shaped core, the coil is wound on the center leg of the E-shaped core, and each permanent magnet is shaped as a rectangle and disposed on both side surfaces of the center leg of the E-shaped core. The permanent magnet is a sheet-like permanent magnet magnetized so that in a longitudinal direction and a thickness direction two poles are formed and a neutral line of this permanent magnet is brought into conformity with the center line of the magnetic gap and is disposed on adjacent outer side surfaces of the I-shaped core. Since the flux generated by the D.C. reactor does not pass inside the permanent magnets, an eddy current loss decreases, and even when a large current abruptly flows through the coil, the permanent magnet is not demagnetized.
摘要翻译： PCT No.PCT / JP95 / 02508 Sec。 371日期：1996年8月5日 102（e）日期1996年8月5日PCT 1995年12月7日PCT PCT。 公开号WO96 / 18198 日期1996年6月13日直流电抗器具有具有由磁隙分开的两个相对的芯的芯结构，以形成封闭的磁路。 线圈缠绕在一个或两个芯上。 一对用于偏置的永磁体设置在芯结构上。 由永磁体产生的偏置磁通和由线圈产生的磁通以相反的方向流动。 提供了用于使由永久磁铁产生的偏置磁通绕过磁隙的旁路装置。 在一个实施例中，芯结构包括E形芯和I形芯，磁隙限定在E形芯的中心腿和I形芯之间，线圈缠绕在 E形芯，每个永磁体被成形为矩形并且设置在E形芯的中心腿的两侧表面上。 永磁体是磁化的片状永磁体，使得在长度方向和厚度方向上形成两个极，并且该永磁体的中性线与磁隙的中心线一致并且设置在相邻的 I形芯的外侧表面。 由于直流电抗器所产生的磁通不通过永久磁铁内，所以涡电流损耗减小，即使当大电流突然流经线圈时，永磁体也不会退磁。
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公开(公告)号：US4916376A
公开(公告)日：1990-04-10
申请号：US211319
申请日：1988-06-24
CPC分类号： H02P21/0003 , H02P23/0004
摘要： An inverter driving method for has an arrangement polyphase induction motor, for altering a plurality of winding connections of the motor and a storage arrangement for a plurality of motor control constant groups preset corresponding to the respective winding connections so as to perform optimal vector control. When the classification of the winding connection is selected, one set of motor control constant groups corresponding to the winding connection is read out of the storage arrangement and applied to a control unit of the induction motor as control constants.
摘要翻译： 一种逆变器驱动方法，具有用于改变电动机的多个绕组连接的配置多相感应电动机和用于对应于各个绕组连接而预先设置的多个电动机控制常数组的存储装置，以执行最佳矢量控制。 当选择绕组连接的分类时，将一组对应于绕组连接的电动机控制常数组从存储装置中读出并施加到感应电动机的控制单元作为控制常数。
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