| 摘要 |
<p>The invention employs a stabilization circuit including a longitudinal branch with a series connection of a Zener diode and a resistor and in the other longitudinal branch with the series connection of a transistor and where the motor winding of the driving electric motor and the cross-branch is provided with a transistor and a corresponding series resistor. In the case of such an operating circuit without current control, the connection of the two modes of operation is advantageously achieved by operating a voltage divider, which comprises a series connection of a temperature dependent resistor element with a relatively small series resistor and a larger adjustable resistor, and in addition in each case again with a smaller series resistor, where this voltage divider influences directly the transistor which is connected in series with the winding. The combination of this temperature dependent circuit for controlling the rotation speed of the stabilization circuit in this simple manner results in a fully satisfying operational circuit.</p> |
