公开(公告)号：EP2403130A2

公开(公告)日：2012-01-04

申请号：EP11171647.8

申请日：2011-06-28

申请人： Hitachi Ltd.

发明人： Sumita, Satoshi ,  Tobari, Kazuaki ,  Maeda, Daisuke ,  Notohara, Yasuo

IPC分类号： H02P21/00

CPC分类号： H02P21/0003

摘要： A control apparatus and a control method for an AC electric motor (1) detect DC bus current plural times at predetermined intervals during first and second predetermined periods and multiply vectors having integrated values of detected values during respective periods as elements by an inverse matrix of a matrix having integrated values during respective periods of sine and cosine functions of output voltage phase of an inverter (2) at the moment that detection is made as elements to thereby estimate reactive and active currents.

摘要翻译： 交流电动机（1）的控制装置和控制方法在第一和第二预定期间以预定间隔多次检测DC总线电流，并且在各个周期期间将检测值的积分值乘以具有由 在作为元件进行检测的时刻，在反相器（2）的输出电压相位的正弦和余弦函数的各个周期内具有积分值的矩阵，从而估计无功和有功电流。

公开(公告)号：EP2273665A2

公开(公告)日：2011-01-12

申请号：EP10006801.4

申请日：2010-07-01

申请人： Hitachi, Ltd.

发明人： Sumita, Satoshi ,  Tobari, Kazuaki ,  Aoyagi, Shigehisa ,  Maeda, Daisuke

IPC分类号： H02P1/02 ,  H02P25/02

CPC分类号： H02P1/029 ,  F05D2260/85 ,  H02P6/182 ,  H02P25/024

摘要： If magnitude relations between the output terminal voltage based on a DC negative terminal of the inverter and a threshold voltage that is a fixed value are compared, polarity thereof is changed at a predetermined rotor phase. The magnitude relation, for example, can be detected by an inexpensive and simple apparatus such as a level shift circuit and a NOT circuit. The rotor phase of the permanent magnet synchronous motor is inferred on the basis of changes in the magnitude relation and if it is differentiated, a rotation speed can be inferred. If the inferred values of the rotor phase and rotation speed are fed back to synchronous operation or vector control, the free-running permanent magnet synchronous motor can be restarted.

摘要翻译： 如果比较基于逆变器的直流负极端子的输出端子电压和固定值的阈值电压之间的大小关系，则其极性在预定的转子相位变化。 例如，可以通过诸如电平移位电路和NOT电路的廉价且简单的装置来检测幅度关系。 永磁同步电动机的转子相位是根据大小关系的变化推断的，如果它是微分，则可以推断转速。 如果将转子相位和转速的推断值反馈到同步运行或矢量控制，则可以重启自由运行的永磁同步电机。