| 摘要 |
The invention relates to an electric driven tool device, especially an electric hand-held tool device, comprising an asynchronous electric motor ( 2 ) or a brush-less synchronous electric motor and a computer-controlled motor control device ( 8 ). The invention is characterized by a frequency converter ( 4 ) which can be controlled by the motor control device, whereby a motor (drive) voltage can be applied to the motor ( 2 ), and with a current detector ( 10 ) which co-operates with the motor control device ( 8 ) and detects the motor current. The motor control device ( 8 ) is embodied in such a manner that, in a first phase of the motor operation, the frequency of the motor current is maintained in a constant manner up to a limiting current I<SUB>(grenz) </SUB>and, in a second phase of the motor operation, at loads above the load at which the motor current reaches the limiting current I<SUB>(grenz)</SUB>, the frequency of the motor current is lowered in such a manner that the motor current is maintained at a constant value. |
