公开(公告)号：US20230415315A1

公开(公告)日：2023-12-28

申请号：US18035465

申请日：2020-11-05

Applicant: TECHTRONIC CORDLESS GP

Inventor： Yong Min LI ,  Li Hua XIE ,  Zhong Kang FANG ,  Ji Guang SUN

IPC: B25C1/00

CPC classification number: B25C1/008 ,  B25C1/06

Abstract: A control system for a power tool is disclosed. The control system comprises: a sensing unit configured to sense an operating characteristic of the power tool; a first control unit configured to determine whether the operating characteristic is within a safe operational range, and to output a first control signal at least partially based on the determination; a second control unit configured to determine whether the operating characteristic is within a safe operational range independently of the first control unit, and to output a second control signal at least partially based on the determination; and an output unit configured to receive the first and second control signals and to activate the power tool when the first and second control signals are received.

公开(公告)号：US20250128389A1

公开(公告)日：2025-04-24

申请号：US18990781

申请日：2024-12-20

Applicant: TECHTRONIC CORDLESS GP

Inventor： Yong Min LI ,  Li Hua XIE ,  Zhong Kang FANG ,  Ji Guang SUN

IPC: B25C1/00 ,  B25C1/06

Abstract: A control system for a power tool, comprising: a sensing unit configured to sense an operating characteristic of the power tool; a first control unit configured to determine whether the operating characteristic is within a safe operational range, and to output a first control signal at least partially based on said determination; a second control unit configured to determine whether the operating characteristic is within a safe operational range independently of the first control unit, and to output a second control signal at least partially based on said determination; and an output unit configured to receive the first and second control signals and to activate the power tool when the first and second control signals are received.

公开(公告)号：US20240088804A1

公开(公告)日：2024-03-14

申请号：US18264149

申请日：2021-02-10

Applicant: TECHTRONIC CORDLESS GP

Inventor： Bao An ZHANG ,  Zi Cong CHEN ,  Li Hua XIE ,  Chao WEN ,  Yong Min LI

IPC: H02P3/22

CPC classification number: H02P3/22

Abstract: Provided is a motor braking device for a N-phase brushless motor. The motor braking device includes a switching circuit adapted to connect the N-phase brushless motor to a power supply, the switching circuit comprising a high side switch group and a low side switch group, each of the high side switch group and the low side switch group comprising N switching elements, and a control unit configured to control the switching circuit to brake the motor based on occurrence of a first event, the first event chosen from a group consisting of release of a trigger by a user, and occurrence of a predetermined condition as detected by a sensor. The control unit is configured to, upon occurrence of the first event, switch all the switching elements of one of the high side switch group or the low side switch group to an on-state, and simultaneously switch all the switching elements of the other one of the high side switch group and the lower side switch group to an off-state.

公开(公告)号：US20230336106A1

公开(公告)日：2023-10-19

申请号：US18245009

申请日：2020-09-18

Applicant: Techtronic Cordless GP

Inventor： Yong Min LI ,  Li Hua XIE ,  Bao An ZHANG ,  Zong Fen LI

IPC: H02P29/032

CPC classification number: H02P29/032

Abstract: A motor driven apparatus including a motor, a first switching module and a second switching module on a current path from one terminal of a battery to another terminal of the battery, and a MCU connected to the first and second switching module. The first and second switching module are connected in series to each other, while the first switching module is connected to the motor and adapted to drive the motor. The MCU is adapted to control the first second switching module separately. The MCU is further adapted to, upon its energization, attempt to control the second switching module to be in a cut-off state until the MCU determines that the first switching module is normal. The MCU attempts to detect failures of the switching elements in the first switching module before it enables operation of the motor.