公开(公告)号：US20180183317A1

公开(公告)日：2018-06-28

申请号：US15901490

申请日：2018-02-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Masayuki NAKAHARA ,  Toshiyuki HIRATA ,  Yasuhisa IHIRA ,  Naoki TSUJIMOTO

IPC: H02M1/08 ,  H02M3/155 ,  H02M7/5387 ,  H02J3/38

CPC classification number: H02M1/08 ,  G05F1/67 ,  H02J3/12 ,  H02J3/14 ,  H02J3/16 ,  H02J3/28 ,  H02J3/32 ,  H02J3/381 ,  H02M3/155 ,  H02M7/48 ,  H02M7/53871

Abstract: In a power converter, a first DC-DC converter converts a DC voltage output from a DC power supply into a DC voltage of a different level. A DC-AC converter converts a DC power output from the first DC-DC converter into an AC power and supplies the AC power to an AC load. A variable load unit connected to a current path that branches from a node between the first DC-DC converter and the DC-AC converter. A controller adjusts the variable load unit so that a total of a power consumption in the AC load and a power consumption in the variable load unit is equal to or larger than a predetermined power value.

公开(公告)号：US20230120149A1

公开(公告)日：2023-04-20

申请号：US17766899

申请日：2020-09-18

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Itaru MURUI ,  Kotaro MOMOEDA ,  Kota KITAMURA ,  Naoki TSUJIMOTO ,  Akito NAKAMURA

IPC: B25B23/147 ,  B25F5/00 ,  B25B21/02

Abstract: An electric tool includes an output shaft and a controller. The output shaft is configured to hold a tip tool and be rotated by motive power provided from an electric motor with the output shaft holding the tip tool. The controller is configured to control rotation of the output shaft in accordance with pressing force in a direction from a tip end of the tip tool toward the output shaft. The electric tool has, as an operation range, a restriction range in which rotation of the output shaft is restricted in a state where the pressing force is less than or equal to a prescribed value.

公开(公告)号：US20230001549A1

公开(公告)日：2023-01-05

申请号：US17778308

申请日：2020-09-18

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Itaru MURUI ,  Shota FUJII ,  Keita OKAMOTO ,  Naoki TSUJIMOTO ,  Kota KITAMURA ,  Kotaro MOMOEDA

IPC: B25B23/147 ,  B25B21/02 ,  H02P23/00

Abstract: An electric tool system includes a motor, a control unit, and an output shaft. The motor includes a stator and a rotor. The control unit performs vector control on the motor. The control unit includes a first acquisition unit, a second acquisition unit, and a command value generation unit. The command value generation unit calculates, based on a torque current acquisition value (current measured value) as a value related to a torque current as acquired by the first acquisition unit and an acceleration acquisition value as a value related to acceleration of the rotor as acquired by the second acquisition unit, at least one of a command value of the torque current to be supplied to the motor or a command value of an excitation current to be supplied to the motor.

公开(公告)号：US20220410283A1

公开(公告)日：2022-12-29

申请号：US17766914

申请日：2020-09-18

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kota KITAMURA ,  Itaru MURUI ,  Naoki TSUJIMOTO ,  Kotaro MOMOEDA ,  Akito NAKAMURA

IPC: B23B45/02 ,  B25F5/00

Abstract: An electric tool includes a pressure-sensitive sensor, a support, an output shaft, and a controller. The pressure-sensitive sensor is configured to sense pressing force which is externally provided. The support supports the pressure-sensitive sensor. The output shaft is configured to hold a tip tool and be rotated relative to the support by motive power provided from an electric motor with the output shaft holding the tip tool. The controller is configured to control rotation of the output shaft in accordance with an output according to the pressing force, the output being output from the pressure-sensitive sensor.