| 摘要 |
<p>The circuit has a comparator for comparison of nominal and actual speeds of the motors and has a phase shifting control for motor supply. The comparator together with a brake voltage control stage and an overcurrent control stage is connected to the phase shift control. The control system is individually connected to a switching device by which the stator winding can be connected either directly, or together with a braking circuit to the supply power stage.</p> |
