| 摘要 |
A drive device is equipped with a reversing switch arrangement 7, which allows the rotation direction of a motor 1, which is provided with two windings 2, 3, to be reversed alternately via controllable semiconductors 4, 5. In order in this case to achieve different rotational speeds in a simple manner, the motor 1 is constructed as a series-wound motor, in each case one controllable semiconductor 4, 5 being connected in series with exclusively one field winding 2, 3. In addition, at least one output 8 or 9 of the reversing switch arrangement 7 emits a variable control signal, by means of which on the one hand a low rotational speed and on the other hand a high rotational speed can be set. <IMAGE> |
