| 摘要 |
The invention relates to an electrically powered tool for fastening elements and comprising a moving shuttle ( 10 ) connected to a driver ( 13 ), and an actuator motor having at least two electromagnetic yoke assemblies ( 8, 9 ), cooperating with said shuttle ( 10 ) which is arranged to be displaced in relation to said yoke assemblies ( 8, 9 ), wherein each yoke assembly ( 8, 9 ) has electric coils ( 15 ) arranged for generating a magnetic field through the shuttle ( 10 ), and a control unit which controls the current in the coils ( 15 ) to generate a magnetic field so that a force is generated for displacing said shuttle ( 10 ). According to the invention, the yoke assemblies ( 8, 9 ) are arranged for generating a magnetic field which is directed generally perpendicular to the direction of movement of said shuttle ( 10 ).
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