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公开(公告)号：EP4346092A1
公开(公告)日：2024-04-03
申请号：EP23194964.5
申请日：2023-09-01
申请人： Black & Decker, Inc.
IPC分类号： H02P29/02
摘要： A method of operating a power tool having a motor and a controller is provided. The method includes: setting a protection time limit associated with a condition of the motor; taking protective action to shut down the motor if the condition of the motor persists for a duration of the protection time limit; and in response to occurrence of the condition during a start-up period of operation of the motor, extending the protection time limit for a duration of a constant-clutch time period to allow an output speed of the motor to reach or exceed a speed threshold, and taking protective action to shut down the motor if the output speed of the motor remains below the speed threshold for the duration of the constant-clutch time period.
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公开(公告)号：EP4306248A1
公开(公告)日：2024-01-17
申请号：EP23184390.5
申请日：2023-07-10
申请人： Black & Decker, Inc.
发明人： YAO, HuaMing , TIAN, Yue , LIU, Jun , LAMBERT, Torrey R. , MACEO, John S. , McKILLICAN, Jason D. , ZOU, YanJuan
摘要： A system for operating a cordless saw (10) is provided with regenerative braking means that increases the number of repeated cuttings the saw (10) is able to perform (x) per full (360) discharge cycle of the battery pack (42), as compared to the number of repeated cuttings achievable by the same saw (10) not employing a regenerative braking means (y) per full (360) discharge cycle of the battery pack (42), by at least approximately 10% ( so x/y = 1.1) when using 89 mm x 89 mm mm pressure-treated wood material, by at least approximately 15% (so x/y= 1.15) when cutting (38) 38 mm x 89 mm mm Spruce Pine Fir (SPF) wood material, or by at least approximately 25% (so x/y = 1.25) when cutting (38) a Medium Density Fiberboard (MDF) workpiece having a thickness of approximately 19 mm ± 1 mm and a width of approximately 76 mm ± 2 mm.
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