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公开(公告)号：US12132360B2
公开(公告)日：2024-10-29
申请号：US17894281
申请日：2022-08-24
Applicant: MAKITA CORPORATION
Inventor： Itsuku Kato
IPC: H02P1/00 , A01G20/47 , H02J7/00 , H02K11/33 , H02P3/00 , H02P5/00 , H02P6/08 , H02P6/20 , H02P6/24
CPC classification number: H02K11/33 , A01G20/47 , H02J7/0024 , H02J7/0044 , H02J7/0045 , H02P6/08 , H02P6/20 , H02P6/24
Abstract: An electric work machine includes a motor, a first connector, a second connector, an energizing circuit, a manual switch, and a controller. The controller electrically disconnects the first connector from the motor based on a first voltage value below a first threshold at a start of motor rotation. The controller maintains an electrical connection of the first connector to the motor based on the first voltage value below the first threshold and equal to or greater than a second threshold during discharge of the first battery.
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公开(公告)号：US10720863B2
公开(公告)日：2020-07-21
申请号：US16379893
申请日：2019-04-10
Applicant: MAKITA CORPORATION
Inventor： Itsuku Kato , Katsuna Hayashi , Kouichi Takeda , Hidenori Nagasaka , Takeshi Kamiya
Abstract: An electric power tool may include a three-phase brushless motor configured to drive a tool, a gear reducer provided between the motor and the tool. The gear reducer is configured to selectively change a reduction ratio from the motor to the tool between a first reduction ratio and a second reduction ratio. The electric power tool may further include a motor controller configured to drive the motor with rectangular waves. The motor controller is configured to selectively change a conduction angle of each rectangular wave between at least a first conduction angle and a second conduction angle.
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公开(公告)号：US10286534B2
公开(公告)日：2019-05-14
申请号：US14685783
申请日：2015-04-14
Applicant: MAKITA CORPORATION
Inventor： Itsuku Kato
Abstract: A driving tool, such as a nailer, includes an electric motor, a crank mechanism driven by the electric motor, and a control apparatus for driving the electric motor. A crank-angle detection or calculation unit (109E) detects the crank angle of the crank mechanism or the motor in order to detect the operation state of the electric motor and a stopped time period of the motor is calculated from the crank angle. A sleep-control unit (109A) switches the driving tool between a sleep mode and a drive-enabled mode. If the stopped time period of the electric motor exceeds a prescribed time period, then the sleep-control unit (109A) switches the driving tool to the sleep mode. In the sleep mode, the electric current supplied to one or more of the control units constituting the control apparatus is reduced or cut off, thereby reducing the power consumption of the driving tool.
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公开(公告)号：US09438141B2
公开(公告)日：2016-09-06
申请号：US14540707
申请日：2014-11-13
Applicant: MAKITA CORPORATION
Inventor： Goshi Ishikawa , Itsuku Kato
Abstract: One aspect of an embodiment of the present disclosure is a braking apparatus for an electric power tool that includes a switching circuit with six switching elements and a brake control unit. The brake control unit switches any one selected switching element of three switching elements forming one selected switch group of a high-side switch group and a low-side switch group to an off state from an on state at a timing at which braking current flows through a diode connected in parallel to the selected switching element upon turn-off of the selected switching element.
Abstract translation: 本公开的实施例的一个方面是一种用于电动工具的制动装置，其包括具有六个开关元件的切换电路和制动控制单元。 制动控制单元将在制动电流流过的定时处，将形成高侧开关组和低侧开关组的一个选择的开关组的三个开关元件的任何一个选择的开关元件从接通状态切换 在选择的开关元件断开时与所选择的开关元件并联连接的二极管。
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公开(公告)号：US11701759B2
公开(公告)日：2023-07-18
申请号：US17026390
申请日：2020-09-21
Applicant: MAKITA CORPORATION
Inventor： Itsuku Kato , Yasuhito Kawai
IPC: B25B21/02 , B25B23/147 , B25B23/14 , B25F5/00
CPC classification number: B25B21/02 , B25B23/1475 , B25B23/1405 , B25D2250/221 , B25F5/001
Abstract: An electric power tool in one aspect of the present disclosure includes a motor, an impact mechanism, and a control circuit. The control circuit executes a motor control process. The motor control process includes limiting an output of the motor in response to establishment of a preset condition. The preset condition is based on a load applied to the motor.
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Patent Agency Ranking
公开(公告)号：US11509129B2
公开(公告)日：2022-11-22
申请号：US16849417
申请日：2020-04-15
Applicant: MAKITA CORPORATION
Inventor： Yuki Kawai , Itsuku Kato
IPC: H02H9/00 , H02P29/024 , H02P6/20 , H02M1/36 , H02M7/06 , H02P1/02 , H03K5/1536 , H03K17/567 , H02M5/458
Abstract: An electric working machine according to one aspect of the present disclosure comprises a motor, a rectifier circuit, a capacitor, a series switching element, a resistive element, a drive circuit, a peak voltage value acquirer, and a controller. The capacitor smooths power rectified by the rectifier circuit. The series switching element is coupled in series with the capacitor. The resistive element is coupled in parallel with the series switching element. The controller brings the series switching element into conduction in a case where AC power is inputted to the rectifier circuit and where a specified conducting condition based on a peak voltage value acquired by the peak voltage value acquirer is satisfied.
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公开(公告)号：US10427284B2
公开(公告)日：2019-10-01
申请号：US15422036
申请日：2017-02-01
Applicant: MAKITA CORPORATION
Inventor： Itsuku Kato
IPC: B25C5/15
Abstract: A fastener driving tool is provided with a plunger, an impact spring, a motor, a drive mechanism, a motor drive control unit, a position detection unit, and a timer unit. The drive mechanism moves the plunger from a stop position to top dead center by rotation of the motor. The impact spring moves the plunger in a driving direction. The position detection unit detects that the plunger has reached a predetermined position by the rotation of the motor, and the timer unit measures time therebetween. The motor drive control unit, after power supply to the motor is cut off, performs a stop control for stopping the motor at the predetermined stop position based on the time measured by the timer unit.
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8.发明授权Power tool having a brushless motor and a control unit for controlling the brushless motor 有权具有无刷电动机的电动工具和用于控制无刷电动机的控制单元公开(公告)号：US09276509B2
公开(公告)日：2016-03-01
申请号：US14165711
申请日：2014-01-28
Applicant: MAKITA CORPORATION
Inventor： Itsuku Kato , Motohiro Omura
Abstract: A power tool according to one aspect of one embodiment described in the disclosure includes a brushless motor, a battery voltage detection unit configured to detect a voltage of a battery that provides energy for driving the brushless motor, a rotational position detection unit configured to detect a rotational position of the brushless motor, and a control unit configured to control a drive output supplied to the brushless motor based at least in part on a signal from the rotational position detection unit. The control unit controls a current conduction angle and/or an advance angle supplied to the brushless motor so that, during control of the drive output to the brushless motor, a rotational speed or a conducting current of the brushless motor approaches or reaches a target value, the target value being based at least in part on a battery voltage detected by the battery voltage detection unit.
Abstract translation: 根据本公开所述的一个实施方式的电动工具，具有：无刷电动机，电池电压检测部，被配置为检测提供用于驱动无刷电动机的能量的电池的电压;旋转位置检测部， 无刷电动机的旋转位置，以及控制单元，被配置为至少部分地基于来自旋转位置检测单元的信号来控制提供给无刷电动机的驱动输出。 控制单元控制提供给无刷电动机的电流导通角和/或提前角，使得在对无刷电动机的驱动输出的控制期间，无刷电动机的转速或导通电流接近或达到目标值 目标值至少部分地基于由电池电压检测单元检测到的电池电压。
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公开(公告)号：US20150298308A1
公开(公告)日：2015-10-22
申请号：US14685783
申请日：2015-04-14
Applicant: MAKITA CORPORATION
Inventor： Itsuku Kato
Abstract: A driving tool, such as a nailer, includes an electric motor, a crank mechanism driven by the electric motor, and a control apparatus for driving the electric motor. A crank-angle detection or calculation unit (109E) detects the crank angle of the crank mechanism or the motor in order to detect the operation state of the electric motor and a stopped time period of the motor is calculated from the crank angle. A sleep-control unit (109A) switches the driving tool between a sleep mode and a drive-enabled mode. If the stopped time period of the electric motor exceeds a prescribed time period, then the sleep-control unit (109A) switches the driving tool to the sleep mode. In the sleep mode, the electric current supplied to one or more of the control units constituting the control apparatus is reduced or cut off, thereby reducing the power consumption of the driving tool.
Abstract translation: 诸如钉枪的驱动工具包括电动机，由电动机驱动的曲柄机构和用于驱动电动机的控制装置。 曲柄角检测或计算单元（109E）检测曲柄机构或电动机的曲柄角，以检测电动机的运行状态，并根据曲柄角计算电动机的停止时间段。 休眠控制单元（109A）在睡眠模式和启用驱动模式之间切换驾驶工具。 如果电动机的停止时间超过规定时间，则睡眠控制单元（109A）将驾驶工具切换到睡眠模式。 在睡眠模式中，提供给构成控制装置的一个或多个控制单元的电流被减少或切断，从而降低了驱动工具的功耗。
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公开(公告)号：US20150158160A1
公开(公告)日：2015-06-11
申请号：US14565993
申请日：2014-12-10
Applicant: MAKITA CORPORATION
Inventor： Itsuku Kato
CPC classification number: B25C1/047 , B25C1/06 , F15B9/09 , F15B15/149 , F15B2211/8855
Abstract: An electro-pneumatic tool drives a fastener into a workpiece by energizing an electric motor to drive a first piston and generate compressed air in a first cylinder. The compressed air is then supplied to a second cylinder and causes a second piston to move and drive the fastener into the workpiece. After the first piston has passed through its top dead center, braking is applied to the first piston according to one or more braking parameters. Then, if a control unit determines that the first piston has come to a stop at a position that is outside a predetermined range about the bottom dead center of the first piston, one or more of the braking parameters is changed in a subsequent fastener driving cycle to cause the first piston to stop closer to its bottom dead center after conclusion of the subsequent fastener driving cycle.
Abstract translation: 电动气动工具通过给电动机通电以驱动第一活塞并在第一气缸中产生压缩空气来将紧固件驱动到工件中。 然后将压缩空气供应到第二气缸，并使第二活塞移动并将紧固件驱动到工件中。 在第一活塞通过其上止点之后，根据一个或多个制动参数对第一活塞进行制动。 然后，如果控制单元确定第一活塞已经在围绕第一活塞的下死点的预定范围外的位置处停止，则在随后的紧固件驱动循环中改变一个或多个制动参数 在随后的紧固件驱动循环结束之后使第一活塞停止靠近其下止点。
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