公开(公告)号：US20170222581A1

公开(公告)日：2017-08-03

申请号：US15490966

申请日：2017-04-19

Applicant: Mitsuba Corporation

Inventor： Masaaki Kimura ,  Hiroto Tanaka ,  Tamotsu Iwazaki ,  Tomohiko Annaka ,  Naoki Kojima ,  Junya Kitazawa

IPC: H02P6/15 ,  B60S1/26 ,  H02K7/116 ,  B60S1/08 ,  H02P6/16 ,  H02K11/215

CPC classification number: H02P6/153 ,  B60S1/08 ,  B60S1/0818 ,  B60S1/0896 ,  B60S1/166 ,  B60S1/26 ,  H02K7/1166 ,  H02K11/215 ,  H02P6/08 ,  H02P6/16 ,  H02P6/182 ,  H02P6/22 ,  H02P23/009 ,  H02P2207/05

Abstract: A brushless motor comprises: a stator 21 having armature coils 21a, 21b, and 21c; a rotor 22 which is rotated by a revolving magnetic field; and a switching element 30a, wherein the brushless motor has a rotation number control unit 33 which switches between low-speed and high-speed mode, wherein in the low-speed mode, the rotation number control unit 33 supplies current to the armature coils 21a, 21b, and 21c at predetermined energization timing and controls a duty ratio to control the rotation number of the rotor 22, and in the high-speed mode, the rotation number control unit 33 supplies current to the armature coils 21a, 21b, and 21c at energization timing advanced from the energization timing for the low-speed mode, thereby performing field weakening control of weakening the revolving magnetic field from that of the low-speed mode to control the rotation number of the rotor 22.

公开(公告)号：US20160241108A1

公开(公告)日：2016-08-18

申请号：US15024156

申请日：2013-09-24

Applicant: Mitsuba Corporation

Inventor： Masaaki Kimura ,  Hiroto Tanaka ,  Tamotsu Iwazaki

IPC: H02K7/116 ,  H02P27/08 ,  B60S1/08 ,  H02K1/27 ,  H02K11/215 ,  H02P6/30 ,  H02P6/16

CPC classification number: H02K7/1166 ,  B60S1/08 ,  H02K1/2753 ,  H02K1/276 ,  H02K1/278 ,  H02K5/10 ,  H02K11/215 ,  H02K29/03 ,  H02K29/08 ,  H02K2201/03 ,  H02K2201/06 ,  H02K2213/03 ,  H02P6/16 ,  H02P6/30 ,  H02P27/08

Abstract: A magnet 34 for the rotating shaft (first magnet, second magnet) is installed on the extended portion of the rotating shaft 33b in the gear housing 41, and Hall ICs 65a to 65c for the rotating shaft (first sensor, second sensor) are formed on the control board 60 inside the gear housing 41 so as to face the magnet 34 for the rotating shaft. The Hall ICs 65a to 65c for the rotating shaft are adapted to detect the rotation position of the rotating shaft 33b relative to the stator 32, that is, the rotation position of the rotor 33 relative to the stator 32, and the Hall ICs 65a to 65c for the rotating shaft are adapted to detect the rotation number of the rotating shaft 33b.

Abstract translation: 用于旋转轴（第一磁体，第二磁体）的磁体34安装在齿轮壳体41中的旋转轴33b的延伸部分上，并且形成用于旋转轴（第一传感器，第二传感器）的霍尔IC 65a至65c 在齿轮壳体41内的控制板60上，以面对旋转轴的磁体34。 用于旋转轴的霍尔IC 65a至65c适于检测旋转轴33b相对于定子32的旋转位置，即转子33相对于定子32的旋转位置，以及霍尔IC 65a至 65c用于检测旋转轴33b的旋转数。