Invention Grant
- Patent Title: Method of controlling a motor
- Patent Title (中): 控制电机的方法
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Application No.: US11897387Application Date: 2007-08-30
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Publication No.: US07791297B2Publication Date: 2010-09-07
- Inventor: Thomas Mueller , Johannes Stempfhuber , Germar Meiendres , Konstantin Baxivanelis , Markus Looser
- Applicant: Thomas Mueller , Johannes Stempfhuber , Germar Meiendres , Konstantin Baxivanelis , Markus Looser
- Applicant Address: LI Schaan
- Assignee: Hilti Aktiengesellschaft
- Current Assignee: Hilti Aktiengesellschaft
- Current Assignee Address: LI Schaan
- Agency: Abelman, Frayne & Schwab
- Priority: DE102006000443 20060904
- Main IPC: H02K17/32
- IPC: H02K17/32

Abstract:
A method for controlling a motor (2) which drives a disk-shaped tool (4) of a power tool (1) and to which a motor voltage in the amount of a nominal value is applied in an “on” position of a motor switch (6), includes determination of an actual motor current (IM) applied to the motor (2) and comparing it to a first predetermined threshold (GW1), and automatically triggering of a control process for protecting the motor (2) when an overload condition which is defined in that the first predetermined threshold (GW1) is exceeded beyond a first predetermined limiting time period (grDt1), is met, the control process including reduction of the motor voltage applied to the motor (2) by a magnitude that can be perceived by the user as a choke value.
Public/Granted literature
- US20080054832A1 Method of controlling a motor Public/Granted day:2008-03-06
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