公开(公告)号：US20220407397A1

公开(公告)日：2022-12-22

申请号：US17839792

申请日：2022-06-14

Applicant: MAKITA CORPORATION

Inventor： Kouichi TAKEDA

IPC: H02K11/33 ,  B62B5/00 ,  H02K5/22

Abstract: One aspect of the present disclosure provides a battery-powered wheelbarrow including a battery housing, a motor, a wheel, a drive circuit, and a control circuit. The control circuit activates, during a drive requirement of the motor not being satisfied, dynamic braking. The control circuit decreases the dynamic braking through the drive circuit in accordance with a lapse of time in response to a first transition having occurred or occurring.

公开(公告)号：US20220071109A1

公开(公告)日：2022-03-10

申请号：US17470138

申请日：2021-09-09

Applicant: Makita Corporation

Inventor： Daisuke SUZUKI ,  Kouichi TAKEDA

IPC: A01G20/47 ,  F04D25/06

Abstract: An electric working machine may include a control device configured to control an electric unit, an operation member, a first switch configured to be operated by the operation member, and a second switch configured to be operated by the operation member. The operation member may pass a second position and a third position while the operation member moves to the first position. The first switch may be configured to transmit a first signal which changes as the operation member moves from the second position to the first position to the control device when the operation member moves between the second position and the first position. The second switch may be configured to transmit a second signal to the control device when the operation member passes the third position. The control device may be configured to control the electric unit based on the first signal and the second signal.

公开(公告)号：US20190319563A1

公开(公告)日：2019-10-17

申请号：US16379893

申请日：2019-04-10

Applicant: MAKITA CORPORATION

Inventor： Itsuku KATO ,  Katsuna HAYASHI ,  Kouichi TAKEDA ,  Hidenori NAGASAKA ,  Takeshi KAMIYA

IPC: H02P6/28 ,  B25F5/00 ,  B23B45/00 ,  B23B45/02

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.

公开(公告)号：US20180048252A1

公开(公告)日：2018-02-15

申请号：US15670242

申请日：2017-08-07

Applicant: MAKITA CORPORATION

Inventor： Michisada YABUGUCHI ,  Kouichi TAKEDA ,  Masumi NISHIMURA ,  Hiroshi NOJIRI

IPC: H02P6/28 ,  H02P6/24 ,  H02P6/06

CPC classification number: H02P6/28 ,  B25F5/00 ,  H02P6/06 ,  H02P6/24 ,  H02P29/032

Abstract: An electric working machine according to one aspect of the present disclosure comprises a motor, a speed setting unit, a load detection unit, a determination unit, and a parameter setting unit. The determination unit calculates an estimated value of a heat generation amount of the motor, and determines that the motor is in an overload operation state when the estimated value reaches a predetermined threshold. The parameter setting unit sets a parameter to be used for calculating the estimated value and/or the threshold in accordance with a rotation speed set by the speed setting unit.