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    SENSORLESS MOTOR CONTROL FOR A POWER TOOL
    51.
    发明申请
    SENSORLESS MOTOR CONTROL FOR A POWER TOOL 有权

    公开(公告)号：US20210229255A1

    公开(公告)日：2021-07-29

    申请号：US17054913

    申请日：2020-04-15

    Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

    Inventor： Timothy R. Obermann ,  Douglas R. Fieldbinder ,  Alex Huber

    IPC: B25F5/00 ,  H02K11/27 ,  H02K21/16 ,  H02P6/182 ,  H02P21/18

    Abstract: Methods and power tools for sensorless motor control. One embodiment provides a method for automatic control switching for driving a sensorless motor (150) of a power tool (100). The method includes determining, using a motor controller (224), a first load point based on user inputs (232) and determining, using the motor controller (224), a first motor control technique corresponding to the first load point. The method also includes driving the motor (150) based on the first motor control technique. The method further includes determining, using the motor controller (224), a change from the first load point to a second load point and determining, using the motor controller (224), a second motor control technique corresponding to the second load point. The method includes driving the motor (150) based on the second motor control technique.

    Electronic braking in a power tool
    52.
    发明授权
    Electronic braking in a power tool 有权

    公开(公告)号：US11075594B2

    公开(公告)日：2021-07-27

    申请号：US16896600

    申请日：2020-06-09

    Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

    Inventor： Carl B. Westerby ,  Timothy R. Obermann ,  Alex Huber

    IPC: H02P3/14 ,  H02P7/29 ,  B25F5/00 ,  H02P3/22 ,  B24B23/02 ,  B24B47/12 ,  B25F5/02

    Abstract: A power tool includes a three-phase DC motor, a power switching network, a power source, and an electronic processor. A first phase of the motor is connected between a first low side electronic switch and a power source electronic switch, and connected to the power source via a first high side electronic switch in parallel with a diode. The electronic processor is configured to receive an indication to stop the motor during operation of the motor and activate the first low side electronic switch and a second low side electronic switch for a first predetermined time responsive to receiving the indication such that a back-electromagnetic force generated by the motor is stored in the first phase. The electronic processor is configured to deactivate the second low side electronic switch after the first predetermined time such that a first regenerative current is provided to the power source via the diode.

    POWER TOOL WITH COMBINED CHIP FOR WIRELESS COMMUNICATIONS AND POWER TOOL CONTROL
    53.
    发明申请
    POWER TOOL WITH COMBINED CHIP FOR WIRELESS COMMUNICATIONS AND POWER TOOL CONTROL 审中-公开

    公开(公告)号：US20200376645A1

    公开(公告)日：2020-12-03

    申请号：US16879245

    申请日：2020-05-20

    Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

    Inventor： Anthony Davis ,  Alex Huber ,  Timothy R. Obermann

    IPC: B25F5/02 ,  G01D5/14 ,  H04M1/725

    Abstract: Power tool devices described herein include a motor, an actuator configured to be actuated by a user, a plurality of power switching elements configured to drive the motor, a gate driver coupled to the plurality of power switching elements and configured to control the plurality of power switching elements, a first printed circuit board (PCB), an antenna, and a combined chip. The combined chip is located on the first PCB and is coupled to the actuator, the antenna, and the gate driver. The combined chip includes a memory and an electronic processor configured to determine that the actuator has been actuated, and provide, in response to determining that the actuator has been actuated, a signal to the gate driver, control the signal based on the motor position information, wirelessly transmit power tool device information to an external device, and wirelessly receive configuration information from the external device via the antenna.

    PEX Expanding Tool
    55.
    发明申请
    PEX Expanding Tool 审中-公开

    公开(公告)号：US20190134884A1

    公开(公告)日：2019-05-09

    申请号：US16241783

    申请日：2019-01-07

    Applicant: Milwaukee Electric Tool Corporation

    Inventor： Corey Dickert ,  Alex Huber ,  Jarrod Kotes ,  Will Didier ,  Ian Zimmermann

    IPC: B29C57/04

    Abstract: An expanding tool comprising: an actuator comprising a cylindrical housing that defines an actuator housing cavity; a primary ram disposed within the actuator housing cavity, the primary ram defining an internal primary ram cavity; a secondary ram disposed within the internal primary ram cavity; a cam roller carrier coupled to a distal end of the secondary ram; a drive collar positioned within a distal end of the actuator housing cavity; a roller clutch disposed within an internal cavity defined by an inner surface of the drive collar; a shuttle cam positioned between the roller clutch and a distal end of the primary ram; an expander cone coupled to the primary ram; and an expander head operably coupled to the drive collar. When triggered, the actuator first rotates the expander head and then the actuator expands the expander head.

    PEX Expanding Tool
    57.
    发明申请
    PEX Expanding Tool 审中-公开

    公开(公告)号：US20180281273A1

    公开(公告)日：2018-10-04

    申请号：US16001147

    申请日：2018-06-06

    Applicant: Milwaukee Electric Tool Corporation

    Inventor： Corey Dickert ,  Alex Huber ,  Jarrod Kotes ,  Will Didier ,  Ian Zimmermann

    IPC: B29C57/04 ,  B29L23/00 ,  B29K23/00 ,  B29K105/00

    CPC classification number: B29C57/045 ,  B29K2023/0691 ,  B29K2105/258 ,  B29L2023/22

    Abstract: An expanding tool comprising: an actuator comprising a cylindrical housing that defines an actuator housing cavity; a primary ram disposed within the actuator housing cavity, the primary ram defining an internal primary ram cavity; a secondary ram disposed within the internal primary ram cavity; a cam roller carrier coupled to a distal end of the secondary ram; a drive collar positioned within a distal end of the actuator housing cavity; a roller clutch disposed within an internal cavity defined by an inner surface of the drive collar; a shuttle cam positioned between the roller clutch and a distal end of the primary ram; an expander cone coupled to the primary ram; and an expander head operably coupled to the drive collar. When triggered, the actuator first rotates the expander head and then the actuator expands the expander head.

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