POWER TOOL IMPLEMENTING A DYNAMIC TRIGGER RESPONSE TO CONTROL THE POWER TOOL

    公开(公告)号:US20240333179A1

    公开(公告)日:2024-10-03

    申请号:US18620626

    申请日:2024-03-28

    IPC分类号: H02P6/08 B25B21/00 G05B13/04

    摘要: A power including a housing, a motor, a motor drive circuit, a trigger, and an electronic controller. The motor is located within the housing and is coupled to an output member. The trigger is configured to generate a trigger signal related to an activation of the trigger. The electronic controller is configured to receive the trigger signal from the trigger. The trigger signal corresponds to a first amount of activation of the trigger. The electronic controller is also configured to determine a magnitude of a characteristic associated with the first amount of activation of the trigger and modify the trigger signal based on the magnitude of the characteristic. The modified trigger signal corresponds to a second amount of activation of the trigger. The second amount of activation of the trigger is different than the first amount of activation of the trigger.

    SINGLE-RESISTOR MEASUREMENT METHOD, MOTOR CONTROL METHOD, CONTROLLER, AND CONTROL SYSTEM

    公开(公告)号:US20240322715A1

    公开(公告)日:2024-09-26

    申请号:US18734428

    申请日:2024-06-05

    IPC分类号: H02P6/08 H02P6/28 H02P21/13

    CPC分类号: H02P6/085 H02P6/28 H02P21/13

    摘要: A single-resistor measurement method, a motor control method, a controller, and a control system are provided. A direct-current bus current flowing through a single sampling resistor is obtained. When a lower tube of a phase bridge arm is switched on, a switch-on current is determined based on the direct-current bus current, and an on-tube voltage drop is obtained. A switch-on resistance is determined based on the switch-on current and the on-tube voltage drop. A three-phase current outside a current measurement dead zone is determined based on the direct-current bus current. A three-phase current inside the current measurement dead zone is determined based on the on-tube voltage drop and the switch-on resistance. A three-phase feedback current of the motor is determined based on the three-phase current outside the current measurement dead zone and the three-phase current inside the current measurement dead zone.

    Direct drive system for brushless DC (BLDC) motor

    公开(公告)号:US12095403B2

    公开(公告)日:2024-09-17

    申请号:US18014410

    申请日:2021-07-06

    摘要: Circuitry for directly providing drive power to a BLDC motor having separated coils, comprising unipolar controlled current sources for supplying current to each of the separated coils; a controller, for controlling the level and phase of the unipolar controlled current sources; a polarity switch for converting the unipolar current to a bipolar (AC) current, supplied to the separated coils. The controller is adapted to shape the current being fed to the BLDC motor by the current source via the polarity switch, to be in phase with the back EMF sensed on the separated coils, and of a magnitude that corresponds to a required torque.

    MOTOR DRIVING DEVICE
    8.
    发明公开

    公开(公告)号:US20240305225A1

    公开(公告)日:2024-09-12

    申请号:US18658498

    申请日:2024-05-08

    IPC分类号: H02P6/17 H02P6/08 H02P6/28

    CPC分类号: H02P6/17 H02P6/08 H02P6/28

    摘要: A motor driving device includes: a rotor position detector that detects a rotor position of the motor; a first waveform generator that generates a first reference waveform based on the rotor position; a second waveform generator that generates a second reference waveform based on the rotor position, the second reference waveform being different from the first reference waveform; a waveform outputter that outputs, as an output waveform, the first reference waveform, the second reference waveform, or a composite waveform of the first reference waveform and the second reference waveform, based on the torque command value; and a current supplier that supplies, to the motor, a motor current generated based on the output waveform. In the motor driving device, the waveform outputter changes a composite ratio between the first reference waveform and the second reference waveform in the composite waveform, according to the torque command value.

    Ripple circuit including hall effect sensor

    公开(公告)号:US12074544B2

    公开(公告)日:2024-08-27

    申请号:US17847925

    申请日:2022-06-23

    摘要: A ripple circuit includes a sensor, and oscillator circuit and a logic gate. The sensor monitors operation of a motor that is powered by a power signal provided by a motor circuit. The sensor outputs a data signal having a first state or a second state based on the operation of the motor. The oscillator circuit generates an oscillating signal having a fixed frequency. The logic gate includes at least one input in signal communication with the sensor and the oscillator circuit and at least one output in signal communication with the motor circuit. The logic gate selectively outputs the oscillating signal based on the first state or the second state of the data signal to generate a modulated signal. The logic gate is configured to deliver the modulated signal to the motor circuit.