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公开(公告)号：US12059737B2
公开(公告)日：2024-08-13
申请号：US17193563
申请日：2021-03-05
发明人： Bing Lu , Xin Yang , Yuwei Yang , Yi Zhou , Tianxiao Xu , Junya Duan
摘要： A power tool includes a tool accessory, a motor, a control module, a power supply, and an operating switch. The operating switch includes a trigger mechanism, a current switch coupled to the trigger mechanism to be actuated by the trigger mechanism for connecting and disconnecting the electrical connection between the power supply module and the motor, and a signal switch coupled to the trigger mechanism to be actuated by the trigger mechanism at least configured to output a control signal to the control module to control the start of the motor.
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公开(公告)号：US20220103113A1
公开(公告)日：2022-03-31
申请号：US17462069
申请日：2021-08-31
发明人： Hong Zhu , Tianxiao Xu
IPC分类号： H02P29/024 , H02P27/06
摘要： A power tool includes a motor, a rectifier circuit, and a driver circuit. An input terminal of the rectifier circuit is connected to a power module, an output terminal is connected to a direct current bus, an input terminal of the driver circuit is connected to the direct current bus, an output terminal is connected to the motor, and a bus capacitor is connected between a high voltage terminal and a low voltage terminal of the direct current bus. A first protection circuit is connected to the input terminal of the rectifier circuit and a second protection circuit is connected in parallel to two terminals of the bus capacitor. The first protection circuit is configured to absorb an overvoltage signal on an input side of the rectifier circuit. The second protection circuit is configured to absorb an overvoltage signal of the direct current bus.
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公开(公告)号：US20210187635A1
公开(公告)日：2021-06-24
申请号：US17193563
申请日：2021-03-05
发明人： Bing Lu , Xin Yang , Yuwei Yang , Yi Zhou , Tianxiao Xu , Junya Duan
摘要： A power tool includes a tool accessory, a motor, a control module, a power supply, and an operating switch. The operating switch includes a trigger mechanism, a current switch coupled to the trigger mechanism to be actuated by the trigger mechanism for connecting and disconnecting the electrical connection between the power supply module and the motor, and a signal switch coupled to the trigger mechanism to be actuated by the trigger mechanism at least configured to output a control signal to the control module to control the start of the motor.
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公开(公告)号：US11938605B2
公开(公告)日：2024-03-26
申请号：US17237566
申请日：2021-04-22
发明人： Huaishu Wang , Tianxiao Xu
CPC分类号： B25D16/006 , B25F5/02 , B25D2250/255
摘要： An electric tool includes a housing, a motor, a tool interface, a control circuit, a master switch, and a protection circuit. The tool interface is configured to connect to a power supply to supply power to the motor. The master switch is disposed on a current path formed by the tool interface and the control circuit. The master switch has an on state in which electric connection between the tool interface and the control circuit is on and an off state in which the electric connection between the tool interface and the control circuit is off. The protection circuit is connected between the master switch and the control circuit and is configured to disconnect connection between the tool interface and the control circuit in response to the master switch being in the on state before the tool interface connects to the power supply.
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公开(公告)号：US20240120857A1
公开(公告)日：2024-04-11
申请号：US18539561
申请日：2023-12-14
发明人： Hailong Wang , Tianxiao Xu
IPC分类号： H02P1/02
摘要： A power tool includes an operating switch; a motor that is connected to the operating switch and capable of starting in response to the conduction of the operating switch and braking in response to the disconnection of the operating switch; and a control circuit configured to control a working state of the motor. The control circuit includes a driver circuit including multiple switching elements; a controller that is coupled to the motor and capable of outputting a first control signal to control the motor to start; and a parameter detection unit for detecting a working parameter of the motor. The controller is configured to, in response to the operating switch being turned on again within a preset time after being turned off, acquire the working parameter and set a duty cycle of a second control signal according to the working parameter to control the motor to restart.
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公开(公告)号：US20220094287A1
公开(公告)日：2022-03-24
申请号：US17474432
申请日：2021-09-14
发明人： Tianxiao Xu , Qi Du
摘要： A power tool includes a motor, a signal switch, a signal detection circuit, a power-on control switch, a first controller, and a second controller. The signal switch is used to switch a power on/off state of the power tool. The signal detection circuit is configured to output a detection signal according to a connection state of the signal switch. The power-on control switch is connected to the second controller. The first controller is configured to control an on/off state of the power-on control switch. When the signal detection circuit outputs a power-off signal, the first controller controls the power-on control switch to be turned off so that the second controller is de-energized and the motor stops rotating. When the power-on control switch still remains on, the second controller controls the switch elements in the driver circuit to be turned off so that the motor stops rotating.
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公开(公告)号：US20210362313A1
公开(公告)日：2021-11-25
申请号：US17237566
申请日：2021-04-22
发明人： Huaishu Wang , Tianxiao Xu
摘要： An electric tool includes a housing, a motor, a tool interface, a control circuit, a master switch, and a protection circuit. The tool interface is configured to connect to a power supply to supply power to the motor. The master switch is disposed on a current path formed by the tool interface and the control circuit. The master switch has an on state in which electric connection between the tool interface and the control circuit is on and an off state in which the electric connection between the tool interface and the control circuit is off. The protection circuit is connected between the master switch and the control circuit and is configured to disconnect connection between the tool interface and the control circuit in response to the master switch being in the on state before the tool interface connects to the power supply.
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公开(公告)号：US12068708B2
公开(公告)日：2024-08-20
申请号：US16726378
申请日：2019-12-24
发明人： Dezhong Yang , Chao Xian , QingXiao Mei , Yuwei Yang , Tianxiao Xu
IPC分类号： H02P29/02 , H02J7/00 , H02P27/06 , H02P29/024
CPC分类号： H02P29/024 , H02J7/0068 , H02P27/06
摘要： An electric power tool includes: a motor; a driving circuit configured to drive the motor to output motive power; a control module configured to control the driving circuit; an energy storage element connected to the driving circuit; a current limiting element connected in series with the energy storage element and configured to charge the energy storage element with a first current; a switching element electrically connected in series with the energy storage element, connected in parallel with the current limiting element, and configured to charge or discharge the energy storage element with a second current. The electric power tool can avoid the occurrence of adverse situations such as generating electric sparks at the connection terminals of the electric power tool and of a battery pack when the battery pack is inserted into the electric power tool.
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公开(公告)号：US11646691B2
公开(公告)日：2023-05-09
申请号：US17462069
申请日：2021-08-31
发明人： Hong Zhu , Tianxiao Xu
IPC分类号： H02P29/024 , H02P27/06
CPC分类号： H02P29/0241 , H02P27/06
摘要： A power tool includes a motor, a rectifier circuit, and a driver circuit. An input terminal of the rectifier circuit is connected to a power module, an output terminal is connected to a direct current bus, an input terminal of the driver circuit is connected to the direct current bus, an output terminal is connected to the motor, and a bus capacitor is connected between a high voltage terminal and a low voltage terminal of the direct current bus. A first protection circuit is connected to the input terminal of the rectifier circuit and a second protection circuit is connected in parallel to two terminals of the bus capacitor. The first protection circuit is configured to absorb an overvoltage signal on an input side of the rectifier circuit. The second protection circuit is configured to absorb an overvoltage signal of the direct current bus.
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公开(公告)号：US11641170B2
公开(公告)日：2023-05-02
申请号：US17474432
申请日：2021-09-14
发明人： Tianxiao Xu , Qi Du
摘要： A power tool includes a motor, a signal switch, a signal detection circuit, a power-on control switch, a first controller, and a second controller. The signal switch is used to switch a power on/off state of the power tool. The signal detection circuit is configured to output a detection signal according to a connection state of the signal switch. The power-on control switch is connected to the second controller. The first controller is configured to control an on/off state of the power-on control switch. When the signal detection circuit outputs a power-off signal, the first controller controls the power-on control switch to be turned off so that the second controller is de-energized and the motor stops rotating. When the power-on control switch still remains on, the second controller controls the switch elements in the driver circuit to be turned off so that the motor stops rotating.
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