Power Tool Motor Control System and Method
    1.
    发明公开

    公开(公告)号:US20240278410A1

    公开(公告)日:2024-08-22

    申请号:US18582370

    申请日:2024-02-20

    IPC分类号: B25F5/00 G01R19/165 H02J7/00

    摘要: Embodiments of the disclosure provide a system and method of operating a power tool. The method includes measuring a battery current draw, sampling the battery current draw to generate a plurality of battery current samples, calculating an averaged current value by averaging the plurality of battery current samples, and comparing the averaged current value with a predetermined current value. The method also includes determining a number of motor revolutions, comparing the number of motor revolutions to a startup threshold, and determining a cycle is complete and stopping the motor when the number of motor revolutions exceeds the startup threshold and the averaged current value is greater than the predetermined current value.

    RESET CIRCUIT
    4.
    发明公开
    RESET CIRCUIT 审中-公开

    公开(公告)号:US20240047963A1

    公开(公告)日:2024-02-08

    申请号:US18225971

    申请日:2023-07-25

    发明人: Yoshihiko SATO

    摘要: A reset circuit includes a first voltage generation unit that generates a first voltage based on a first power supply voltage output from a first constant voltage source, and a comparator that includes a positive power supply terminal to which the first voltage is input, a negative power supply terminal connected to a ground circuit, one input terminal as one of positive and negative input terminals and to which a reference voltage is input, another input terminal as the other of the positive and negative input terminals and to which a divided voltage obtained by dividing a second power supply voltage supplied from a second constant voltage source different from the first constant voltage source and to be detected based on the reference voltage is input, and an output terminal that outputs a reset signal to reset a subsequent circuit to the initial state according to a comparison result.

    Current testing device
    10.
    发明授权

    公开(公告)号:US11698395B1

    公开(公告)日:2023-07-11

    申请号:US17535619

    申请日:2021-11-25

    申请人: John Alexander

    发明人: John Alexander

    IPC分类号: G01R15/12 G01R19/165

    摘要: A current testing device including a housing assembly, an electrical assembly and a circuit board assembly is disclosed herein. The housing assembly includes a housing that encloses the electrical assembly. The electrical assembly includes a battery, a microprocessor, a display, a keypad, a power button, an electrical port, and test cables. The microprocessor permits the user to simulate a fuse. The microprocessor has a memory in which a predetermined catalogue of fuses characteristics is stored. The user connects the test cables to a circuit board where the fuse is blown. The keypad allows the user to type the simulation characteristics while the display shows the results of the simulation.