公开(公告)号：US20180241281A1

公开(公告)日：2018-08-23

申请号：US15874421

申请日：2018-01-18

Applicant: MAKITA CORPORATION

Inventor： Toan Van DOAN ,  Motohiro OMURA ,  Tatsuya NAGAHAMA

IPC: H02K7/08 ,  H02K21/14 ,  H02K11/215 ,  H02K7/14 ,  H02K5/16 ,  B25D16/00 ,  B25F5/02

CPC classification number: H02K7/083 ,  B25D16/003 ,  B25D16/006 ,  B25D17/00 ,  B25D2211/003 ,  B25D2211/061 ,  B25D2216/0015 ,  B25D2216/0023 ,  B25D2216/0038 ,  B25D2216/0084 ,  B25D2250/095 ,  B25D2250/221 ,  B25D2250/265 ,  B25D2250/331 ,  B25F5/00 ,  B25F5/02 ,  H02K3/522 ,  H02K5/161 ,  H02K7/14 ,  H02K7/145 ,  H02K11/215 ,  H02K21/145 ,  H02K2211/03

Abstract: A power tool including a brushless motor having a sensor circuit board has higher durability. The power tool includes a housing, a brushless motor including a rotor having a rotational shaft, a stator, and a sensor circuit board fixed to the stator and having a rotation detecting element that detects rotation of the rotor, and receiving the rotational shaft through the sensor circuit board, and a bearing held in the housing and supporting the rotational shaft. The bearing is located to overlap the rotation detecting element in an axial direction of the rotational shaft.

公开(公告)号：US20210039231A1

公开(公告)日：2021-02-11

申请号：US16935758

申请日：2020-07-22

Applicant: MAKITA CORPORATION

Inventor： Yuta ARAKI ,  Motohiro OMURA ,  Akira ITO

IPC: B25B21/00 ,  B25B23/147 ,  B25F5/00

Abstract: A driver-drill (1) includes: a controller (32), which stops rotation of a brushless motor (9) when a torque applied to a spindle (26) reaches a prescribed clutch-actuation torque; and a dial (65), which is capable of specifying, to the controller (32), the setting of the prescribed clutch-actuation torque within a prescribed high-low range of values. In the controller (32), a relationship between clutch-actuation torques and each value in the high-low range is set such that, in a first range in which the values are low, changes in the clutch-actuation torques are the same in the low-speed mode and in the high-speed mode and such that, in a second range outside of the first range, the clutch-actuation torques in the low-speed mode are higher than in the high-speed mode.

公开(公告)号：US20200381933A1

公开(公告)日：2020-12-03

申请号：US16884788

申请日：2020-05-27

Applicant: MAKITA CORPORATION

Inventor： Motohiro OMURA ,  Junya MATSUSHITA ,  Yoshitaka ICHIKAWA

IPC: H02J7/00

Abstract: An electric working machine of one aspect of the present disclosure includes a connection port, a control circuit, and/or a power supply switch. The power supply switch is provided on a power supply path extending from a battery pack connected to the connection port to the control circuit. The power supply switch maintains an ON state while a power supply permission signal is output from the battery pack to the electric working machine. The control circuit outputs an ON-command signal to the power supply switch for a specified period of time in response to loss of the power supply permission signal from the battery pack.

公开(公告)号：US20160028344A1

公开(公告)日：2016-01-28

申请号：US14801420

申请日：2015-07-16

Applicant: MAKITA CORPORATION

Inventor： Takuya KUSAKAWA ,  Goshi ISHIKAWA ,  Motohiro OMURA

IPC: H02P29/02 ,  H02P27/04

CPC classification number: H02P27/04 ,  H02J7/0029 ,  H02J7/0063 ,  H02P27/06 ,  H02P29/0241 ,  H02P29/027

Abstract: A motor driven appliance comprises a battery, a motor, at least one switch, a control unit, an abnormality detection unit, a determination unit, and a processing unit. The at least one switch comprises an operation switch. The control unit controls driving of the motor by controlling power supply from the battery to the motor when the operation switch is turned on. The abnormality detection unit detects abnormality of the appliance. The determination unit determines whether the detected abnormality is a first type abnormality that can be cleared when the operation switch is switched from on to off, or is a second type abnormality that cannot be cleared even if the operation switch is merely switched from on to off. The processing unit is configured to perform a specific process when it is determined that the detected abnormality is the second type abnormality.

Abstract translation: 电动机驱动的装置包括电池，电动机，至少一个开关，控制单元，异常检测单元，确定单元和处理单元。 所述至少一个开关包括操作开关。 控制单元通过在操作开关接通时控制从电池向电动机的供电来控制电动机的驱动。 异常检测单元检测器具的异常。 确定单元确定检测到的异常是否是当操作开关从接通切换到关闭时可以被清除的第一类型异常，或者即使操作开关仅仅从接通切换到关闭而不能被清除的第二类型异常 。 处理单元被配置为当确定检测到的异常是第二类型异常时执行特定处理。

公开(公告)号：US20140203745A1

公开(公告)日：2014-07-24

申请号：US14155691

申请日：2014-01-15

Applicant: MAKITA CORPORATION

Inventor： Motohiro OMURA

IPC: H02P6/00

CPC classification number: H02P6/005 ,  H02H5/04 ,  H02H7/08 ,  H02P6/28 ,  H02P29/68

Abstract: In a motor control circuit, a switching element such as an FET for controlling a motor current and a current detection element for detecting the motor current are connected in series. One terminal of a temperature detection element is electrically connected to an electrical connecting section between the FET and the current detection element, and the other terminal of the temperature detection element is electrically connected to a temperature detection circuit.

Abstract translation: 在电动机控制电路中，串联连接有用于控制电动机电流的开关元件和用于检测电动机电流的电流检测元件。 温度检测元件的一个端子电连接到FET和电流检测元件之间的电连接部分，并且温度检测元件的另一个端子电连接到温度检测电路。