发明公开
EP0033161A1 Method and control circuit for temperature monitoring of an electric motor
失效
Verfahren und Steuerung zurTemperaturüberwachungeines elektrischen Motors。
- 专利标题： Method and control circuit for temperature monitoring of an electric motor
- 专利标题（中）： Verfahren und Steuerung zurTemperaturüberwachungeines elektrischen Motors。
-
申请号： EP81100617.0申请日： 1981-01-28
-
公开(公告)号： EP0033161A1公开(公告)日： 1981-08-05
- 发明人: Saar, David Alan
- 申请人： Black & Decker Inc.
- 申请人地址： Drummond Plaza Office Park 1423 Kirkwood Highway Newark Delaware 19711 US
- 专利权人： Black & Decker Inc.
- 当前专利权人： Black & Decker Inc.
- 当前专利权人地址： Drummond Plaza Office Park 1423 Kirkwood Highway Newark Delaware 19711 US
- 代理机构： Wombwell, Francis
- 优先权： US116258 19800128
- 主分类号： H02H7/085
- IPC分类号： H02H7/085 ; H02P5/28
摘要：
A digital control system for electric motors (90) in power tools of the portable or stationary type includes a microcomputer (126) controlled speed regulator connected to the electric motor (90) for maintaining a preselected speed of the motor (90) substantially constant between no load and full load operation of the motor. The preselected speed is inputted to the microcomputer (126) by means of a rotary switch (128a) or similar input switching arrangement When the tool is just starting or the operator changes the speed switch, the microcomputer (126) controls the speed of the motor (90) to slowly approach the desired speed. The microcomputer (126) is programmed to detect an overload condition and activate an alarm, and an impending kickback condition and stop the electric motor (90).
公开/授权文献
信息查询
