公开(公告)号：US20140346984A1

公开(公告)日：2014-11-27

申请号：US14455944

申请日：2014-08-11

Applicant: KABUSHIKI KAISHA YASKAWA DENKI

Inventor： Takayuki SHIOTA ,  Shinya MORIMOTO ,  Hideaki IURA

IPC: H02P6/18 ,  H02P21/14

CPC classification number: H02P6/183 ,  H02P21/18 ,  H02P21/24

Abstract: A controlling apparatus for an electric motor according to an embodiment includes a superposed component generator, an inverter, a current detector, and a magnetic pole position estimator. The superposed component generator generates, at a predetermined cycle, a superposed voltage reference of which vector is shifted by 90 degrees with respect to that of a superposed voltage reference previously generated, in a coordinate system that is set to a stator of the electric motor. The inverter outputs a driving voltage that is based on a driving voltage reference superposed with the superposed voltage reference to the electric motor. The current detector detects currents flowing into respective phases of the electric motor, and outputs the detected currents. The magnetic pole position estimator detects the magnetic pole position of the electric motor based on an amount of change in the detected currents at the predetermined cycle.

Abstract translation: 根据实施例的用于电动机的控制装置包括叠加分量发生器，逆变器，电流检测器和磁极位置估计器。 叠加分量发生器以预定的周期在相对于先前产生的叠加的电压基准的矢量偏移90度的叠加电压基准上，在设定到电动机的定子的坐标系中产生。 逆变器输出基于与叠加的基准叠加的驱动电压基准的驱动电压到电动机。 电流检测器检测流入电动机的各相的电流，并输出检测到的电流。 磁极位置估计器基于在预定周期的检测电流的变化量来检测电动机的磁极位置。