发明公开
EP1407537A1 MICROPROCESSOR FOR CONTROLLING THE SPEED AND FREQUENCY OF A MOTOR SHAFT IN A POWER TOOL
审中-公开
微处理器控制一轴的转速和频率在电动工具
- 专利标题： MICROPROCESSOR FOR CONTROLLING THE SPEED AND FREQUENCY OF A MOTOR SHAFT IN A POWER TOOL
- 专利标题（中）： 微处理器控制一轴的转速和频率在电动工具
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申请号： EP02749574.6申请日： 2002-06-11
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公开(公告)号： EP1407537A1公开(公告)日： 2004-04-14
- 发明人: HENDERSON, Jeffery, L. , MOON, Hong , WARDRUP, Mark , REED, Ivan
- 申请人： Tyco Electronics Corporation
- 申请人地址： 2901 Fulling Mill Road Middletown, PA 17057-3163 US
- 专利权人： Tyco Electronics Corporation
- 当前专利权人： Tyco Electronics Corporation
- 当前专利权人地址： 2901 Fulling Mill Road Middletown, PA 17057-3163 US
- 代理机构： Johnstone, Douglas Ian
- 优先权： US901353 20010709
- 国际公布： WO2003007467 20030123
- 主分类号： H02P7/29
- IPC分类号： H02P7/29 ; B25B21/00 ; B23P19/06 ; H02H7/085
摘要：
A control system for driving a power tool is provided comprising a power source, a motor adapted to drive a shaft, a power switching unit interconnecting the power source and the motor, and a controller. The power switching unit applying a pulse width modulated (PWM) drive signal from the power source to the motor. The controller monitoring at least one electrical characteristic of at least one of the power source, motor and power switching unit and adjusting the operating duty cycle of the PWM drive signal based on the electrical characteristics.
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