公开(公告)号：US20200295688A1

公开(公告)日：2020-09-17

申请号：US16794043

申请日：2020-02-18

Applicant: KONICA MINOLTA, INC.

Inventor： Hiroyuki YOSHIKAWA ,  Yuta TACHIBANA ,  Yuji KOBAYASHI ,  Kazumichi YOSHIDA ,  Daichi SUZUKI ,  Harumitsu FUJIMORI

IPC: H02P21/18 ,  H02P21/22 ,  H02P21/34 ,  H02P27/12 ,  G03G15/00

Abstract: In a motor control device that controls a sensorless-type motor, a controller estimates an initial magnetic pole position of a rotor of a motor by an inductive sensing scheme while sequentially setting a plurality of energization angles. At each of the set energization angles, the controller converts peak values of currents flowing through a plurality of phases of a stator winding into a first current component having an electrical angle that is equal to a corresponding one of the set energization angles and a second current component that is different in electrical angle by 90 degrees from the first current component, to correct the first current component based on the second current component. The controller estimates the initial magnetic pole position of the rotor based on the corrected first current component that is obtained at each of the set energization angles.

公开(公告)号：US20150028533A1

公开(公告)日：2015-01-29

申请号：US14337416

申请日：2014-07-22

Applicant: KONICA MINOLTA, INC.

Inventor： Takaki KATO ,  Yuji KOBAYASHI ,  Yuta TACHIBANA ,  Hiroshi YAMAGUCHI ,  Satoshi TESHIMA

IPC: B65H7/14 ,  B65H3/06 ,  B65H7/20

CPC classification number: B65H7/14 ,  B65H3/0607 ,  B65H2511/22 ,  B65H2513/514 ,  B65H2553/414 ,  B65H2553/44 ,  B65H2701/1311 ,  B65H2701/1313 ,  B65H2801/06 ,  B65H2220/01 ,  B65H2220/03 ,  B65H2220/02

Abstract: A sheet feeder picking up and transporting sheets includes a transport unit transporting sheets along a sheet transport path one by one, a gap occurrence detection unit detecting, within a predetermined section of the sheet transport path, occurrence of a gap between sheets, and a controller controlling a timing of the transport of sheets according to a result of the detection. The gap occurrence detection unit includes a first detection unit and a second detection unit. The first detection unit is configured to detect light that is emitted toward the predetermined section, reaches a converging surface thereof across the predetermined section, and converged on a receiving element thereof. The second detection unit is configured to detect light reflected by a sheet passing through the predetermined section. The occurrence of the gap is detected based on outputs from the first detection unit and the second detection unit.

Abstract translation: 送纸器拾取和传送纸张包括一个传送单元，一个一个地沿着纸张传送路径传送纸张;间隙发生检测单元，检测在纸张传送路径的预定部分内发生纸张之间的间隙;以及控制器 根据检测结果控制纸张的传送定时。 间隙发生检测单元包括第一检测单元和第二检测单元。 第一检测单元被配置为检测朝向预定部分发射的光，到达其预定部分的会聚表面，并且会聚在其接收元件上。 第二检测单元被配置为检测通过预定区段的片材反射的光。 基于来自第一检测单元和第二检测单元的输出检测间隙的发生。