Torque control circuit for impact tool
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United States of America Patent
Stats
-
Nov 23, 2010
Grant Date -
Dec 10, 2009
app pub date -
Jun 10, 2008
filing date -
Jun 10, 2008
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A torque control circuit includes a motor driving circuit, a motor operating current detection circuit, a reference voltage generation circuit, a maximum motor current setting circuit, a torque setting circuit, an information output circuit, a regulated-voltage power supply circuit, a motor operating temperature detection circuit, and a control circuit. The control circuit includes an integrated circuit to carry out functions of reading information detection sources, processing, and instruction for execution of torque control and output terminals of the reference voltage generation circuit, the maximum motor current setting circuit, the motor operating temperature detection circuit, and the motor impedance torque setting circuit are respectively connected to corresponding input terminals of the integrated circuit to carry out desired control of torque supplied to the impact tool.
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