公开(公告)号：US20130241340A1

公开(公告)日：2013-09-19

申请号：US13655449

申请日：2012-10-19

Applicant: KABUSHIKI KAISHA YASKAWA DENKI

Inventor： Mitsuhiro KOGA ,  Kensuke NAKAZONO

IPC: H02K1/27

CPC classification number: H02K1/2773

Abstract: A rotor according to an embodiment includes a cylindrical rotor core in which a plurality of magnet embedding grooves are radially arranged, ferrite magnets, and samarium-based magnets. The ferrite magnets and the samarium-base magnets are arranged in juxtaposition in a radial direction in the magnet embedding grooves provided on the rotor.

Abstract translation: 根据实施例的转子包括其中径向布置有多个磁体嵌入槽的圆柱形转子芯，铁氧体磁体和钐基磁体。 铁氧体磁体和钐基磁体在设置在转子上的磁体嵌入槽中沿径向并列布置。

公开(公告)号：US20210367546A1

公开(公告)日：2021-11-25

申请号：US17324106

申请日：2021-05-19

Applicant: KABUSHIKI KAISHA YASKAWA DENKI

Inventor： Sadayuki SATO ,  Hideaki IURA ,  Mitsuhiro KOGA

IPC: H02P27/08 ,  H02P25/026 ,  H02P21/06 ,  H02P21/18 ,  H02P21/14

Abstract: A power conversion apparatus includes circuitry to: generate a first command to provide a first electrical output to a motor; receive a first electrical response to the first electrical output; estimate a position of a magnetic pole of the motor based on the first electrical response; set a pulse provide condition in accordance with the estimated position of the magnetic pole; generate a second command to provide a positive electrical pulse output and a negative electrical pulse output to the motor in accordance with the pulse provide condition; receive a positive electrical response to the positive electrical pulse output and a negative electrical response to the negative electrical pulse output; calculate a magnitude difference between the positive electrical response and the negative electrical response; change the pulse provide condition to generate a modified second command when the magnitude difference is smaller than a predetermined difference level; and estimate a polarity of the magnetic pole based on the magnitude difference corresponding to the modified second command when the magnitude difference is larger than the predetermined difference level.