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：US20200260643A1

公开(公告)日：2020-08-20

申请号：US16778276

申请日：2020-01-31

Applicant: MAKITA CORPORATION

Inventor： Tatsuya HATA ,  Hiroshi NOJIRI ,  Yoshitaka ICHIKAWA

IPC: A01D34/73 ,  A01D34/78 ,  A01G3/06 ,  A01D34/416 ,  A01D34/90 ,  A01D34/82

Abstract: One aspect of the present disclosure provides an electric working machine. The electric working machine includes a driver, a motor, and a control circuit. Attached to the driver is a selected tool. The motor drives the selected tool attached to the driver. The control circuit sets a target rotational frequency based on the selected tool. The control circuit controls the motor to rotate at the target rotational frequency.

公开(公告)号：US20190047131A1

公开(公告)日：2019-02-14

申请号：US16052747

申请日：2018-08-02

Applicant: MAKITA CORPORATION

Inventor： Yoshitaka ICHIKAWA ,  Goshi ISHIKAWA ,  Shinichi HIRA ,  Yasuhito KAWAI ,  Masahiro WATANABE ,  Takuya KUSAKAWA

IPC: B25F5/00 ,  H02P29/40 ,  B25B21/02

Abstract: An electric working machine in one aspect of the present disclosure includes a motor, a controller, and a setter. The controller is configured to change a rotational state of the motor, in response to an establishment of a condition for change after the motor is initiated, from a low speed rotation to a high speed rotation. The setter is configured to set, based on a situation in the motor in the low speed rotation, a control variable of the motor in the high speed rotation and/or the condition for change.

公开(公告)号：US20180367070A1

公开(公告)日：2018-12-20

申请号：US15992530

申请日：2018-05-30

Applicant: MAKITA CORPORATION

Inventor： Yoshitaka ICHIKAWA

IPC: H02P3/12

CPC classification number: H02P3/12 ,  B24B23/028 ,  B24B47/12

Abstract: In one aspect of the present disclosure, an electric working machine includes a three-phase brushless motor, a first switching element, a second switching element, a third switching element, a fourth switching element, a fifth switching element, a sixth switching element, a rotation detector, a brake controller. The brake controller executes a two-phase short-circuit brake. The two-phase short-circuit brake is executed so as to switch any of the fourth switching element, the fifth switching element, and the sixth switching element to a corresponding ON-state or an OFF-state in response a detection signal from the rotation detector that occurs prior to a switching time.

公开(公告)号：US20170060471A1

公开(公告)日：2017-03-02

申请号：US15244130

申请日：2016-08-23

Applicant: MAKITA CORPORATION

Inventor： Hirokatsu YAMAMOTO ,  Yoshitaka ICHIKAWA

IPC: G06F3/06 ,  G05B19/042

Abstract: A work apparatus in one aspect of the present disclosure comprises a control unit, a volatile memory and a rewritable non-volatile memory. The control unit comprises an update processing unit and a writing processing unit. The writing processing unit writes history information in the volatile memory into the non-volatile memory when the writing processing unit predicts a suspension of supply of an electric power to the control unit.

Abstract translation: 本公开的一个方面的工作装置包括控制单元，易失性存储器和可重写非易失性存储器。 控制单元包括更新处理单元和写入处理单元。 当写入处理单元预测向控制单元提供电力的暂停时，写入处理单元将历史信息写入到易失性存储器中。

公开(公告)号：US20160107297A1

公开(公告)日：2016-04-21

申请号：US14885448

申请日：2015-10-16

Applicant: MAKITA CORPORATION

Inventor： Goshi ISHIKAWA ,  Ryunosuke KUMAGAI ,  Takuya KUSAKAWA ,  Yoshitaka ICHIKAWA ,  Tokuo HIRABAYASHI

IPC: B25B21/00 ,  B25B21/02

CPC classification number: B25B21/008 ,  B25B21/02 ,  B25B21/026 ,  B25B23/18

Abstract: An electric power tool in one aspect of the present disclosure comprises a motor, a hitting mechanism, a hitting detector, and a control unit. The control unit is configured to set a control amount of the motor so that the motor rotates at a lower speed than a speed in the target rotation state during an initial driving period, and switch the control amount to a final control amount corresponding to the target rotation state when the initial driving period elapses. The initial driving period is a period from when generation of a hitting force is detected by the hitting detector until a predetermined first time period elapses, after the motor is started driven.

Abstract translation: 本公开的一个方面的电动工具包括电动机，击打机构，击打检测器和控制单元。 控制单元被配置为设置电动机的控制量，使得电动机在初始驱动期间以比目标旋转状态的速度低的速度旋转，并且将控制量切换到对应于目标的最终控制量 当初始驾驶时间过去时的旋转状态。 初始驱动期间是在电动机开始驱动之后从打击检测器产生击打力直到经过预定的第一时间段的时间段。

公开(公告)号：US20140096988A1

公开(公告)日：2014-04-10

申请号：US14045225

申请日：2013-10-03

Applicant: MAKITA CORPORATION

Inventor： Shinji HIRABAYASHI ,  Yoshitaka ICHIKAWA

IPC: B23Q5/04 ,  B25F5/00

CPC classification number: B23Q5/043 ,  A01D34/90 ,  B25F5/00

Abstract: A brush cutter as a power tool includes a combustion engine, an electric motor, a gear head which drives a blade, a battery pack which provides electric current to the electric motor and a controller which controls a driving of the blade. An output shaft of the combustion engine and an output shaft of the electric motor are arranged coaxially to each other. Further, the combustion engine drives the gear head and thereby the blade is driven. The controller has a first control mode in which the blade is driven and a second control mode in which the battery pack is charged. In the second control mode, the controller controls the combustion engine so that the combustion engine drives the electric motor as a generator without driving the blade, and the battery pack is charged by the generator.

Abstract translation: 作为动力工具的刷刀包括内燃机，电动机，驱动叶片的齿轮头，向电动机提供电流的电池组以及控制叶片驱动的控制器。 内燃机的输出轴和电动机的输出轴彼此同轴设置。 此外，内燃机驱动齿轮头，从而驱动叶片。 控制器具有驱动叶片的第一控制模式和电池组被充电的第二控制模式。 在第二控制模式中，控制器控制内燃机，使得内燃发动机作为发电机驱动电动机而不驱动叶片，电池组由发电机充电。