公开(公告)号：US20170030378A1

公开(公告)日：2017-02-02

申请号：US15220543

申请日：2016-07-27

Applicant: MINEBEA CO., LTD.

Inventor： Seiya FUJIMOTO ,  Kiyohisa NARA ,  Tetsuya SEKI

IPC: F04D29/66 ,  F04D29/42 ,  F04D29/28 ,  F04D25/06 ,  F04D29/16

CPC classification number: F04D29/4226 ,  F04D25/0613 ,  F04D29/162 ,  F04D29/281 ,  F05D2250/314

Abstract: A centrifugal fan includes: a casing including an upper casing, a lower casing, and struts disposed between the upper casing and the lower casing; and an impeller that is provided in the casing, the impeller having an annular shroud, a plurality of blades, and a main plate, wherein the main plate of the impeller has an inclined surface between an inner circumference side and an outer circumference side of the impeller, and wherein the inner circumference side of the impeller is located at an upward position in an axial direction of the impeller, and the outer circumference side of the impeller is located at an downward position in the axial direction of the impeller.

Abstract translation: 离心风扇包括：壳体，包括上壳体，下壳体和布置在上壳体和下壳体之间的支柱; 以及设置在所述壳体中的叶轮，所述叶轮具有环形罩，多个叶片和主板，所述叶轮的主板在所述叶轮的内周侧和外周侧之间具有倾斜面 叶轮的内周侧位于叶轮的轴向上方，叶轮的外周侧位于叶轮的轴向的下方位置。

公开(公告)号：US20160276974A1

公开(公告)日：2016-09-22

申请号：US15070695

申请日：2016-03-15

Applicant: MINEBEA CO., LTD.

Inventor： Shigeki MIYAJI ,  Takayuki MATSUI ,  Tetsuya SEKI

IPC: H02P27/06

CPC classification number: H02P29/50 ,  H02P8/32

Abstract: A motor drive controller includes: a control circuit that controls an AC current flowing in a motor; a frequency modulation unit that frequency-modulates a speed of the motor when the motor is driven at a predetermined speed; and a current effective value controller that decreases an effective value of the AC current flowing in the motor as the speed of the motor modulated by the frequency modulation unit becomes closer to a resonant frequency of the motor.

Abstract translation: 电机驱动控制器包括：控制电动机，其控制在电动机中流动的AC电流; 频率调制单元，其在以预定速度驱动所述电动机时对所述电动机的速度进行频率调制; 以及电流有效值控制器，其随着由调频单元调制的电动机的速度变得更接近于电动机的谐振频率，而降低在电动机中流动的AC电流的有效值。