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公开(公告)号：US20240088807A1
公开(公告)日：2024-03-14
申请号：US18389441
申请日：2023-11-14
发明人： Kang Zhan , Naifu Chen , Guangdong Wei , Jun Lu , Hang Zhu
摘要： A power tool includes a brushless motor, including a stator and a rotor; an inverter circuit, including a plurality of switch components, where the plurality of switch components are configured to perform a switch action to control driving of the brushless motor; and a controller, electrically connected to the inverter circuit and the brushless motor, the controller including a load detection module configured to detect a parameter indicating a workload of the brushless motor. In response to the parameter being less than a set threshold, the controller is configured to control the brushless motor to maintain a first target rotational speed; and in response to the parameter being greater than or equal to a set threshold, the controller controls the brushless motor to maintain a second target rotational speed. The first target rotational speed may be greater than the second target rotational speed.
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公开(公告)号：US11465268B2
公开(公告)日：2022-10-11
申请号：US16355104
申请日：2019-03-15
发明人： Hang Zhu , Haibo Zhang
摘要： A power device for an electric tool and system is provided that can power tool bodies of different electric tools. The power device includes a power control unit that receives a control instruction transmitted by the tool control unit and controls the motor according to control instructions. The power device not only improves the utilization rate of general modules, such as a motor and a battery pack, but also improves the expandability of the system, reduces the amount of programs in the power device, and eliminates the need to update the programs in the power device to be adapted to a new working body.
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