Invention Grant
- Patent Title: Drive arrangement for a portable working machine
- Patent Title (中): 便携式工作机械的驱动装置
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Application No.: US11959420Application Date: 2007-12-18
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Publication No.: US07652438B2Publication Date: 2010-01-26
- Inventor: Heiko Rosskamp
- Applicant: Heiko Rosskamp
- Applicant Address: DE Waiblingen
- Assignee: Andreas Stihl AG & Co KG
- Current Assignee: Andreas Stihl AG & Co KG
- Current Assignee Address: DE Waiblingen
- Agency: Klarquist Sparkman, LLP
- Priority: DE102006062354 20061222
- Main IPC: H02P1/00
- IPC: H02P1/00

Abstract:
A drive arrangement for a hand-guided working machine for agriculture, forestry and horticulture applications. The drive arrangement comprises an electric motor, a DC power source for electrical energy, and a control apparatus for the electric motor which is fed from the DC power source. The electric motor has a specific, in particular linear, characteristic curve between the electric current which is consumed by the electric motor and the rotational speed of an output shaft of the electric motor. The control apparatus has current-limiter which limits the current which flows through the electric motor to a maximum value in order to protect the electric motor against overloading. The control apparatus limits the current consumption of the electric motor in a range of low rotational speeds to values which are considerably smaller than the characteristic curve values which are given for these rotational speeds by the characteristic curve of the electric motor, as a function of the rotational speed.
Public/Granted literature
- US20080150460A1 DRIVE ARRANGEMENT FOR A PORTABLE WORKING MACHINE Public/Granted day:2008-06-26
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