| 摘要 |
<p>A bistable contactor drive circuit, a series branch comprising a first relay coil and a control signal source is connected to a power supply, a third normally-closed contact and an eighth normally-opened contact of the first relay are connected to the positive pole of the power supply, a first normally-opened contact and a sixth normally-closed contact are connected to the negative pole of the power supply, a second movable contact is connected to the positive pole of the bistable contactor coil, its seventh movable contact is connected to the seventh movable contact of the second relay, the negative pole of the bistable contactor coil is connected to the second movable contact of the second relay, the third normally-closed contact of the second relay is connected to the cathode of a seventh diode, the sixth normally-closed contact is connected to the anode of the seventh diode, the first normally-opened contact is connected to the anode of an eighth diode, the eighth normally-opened contact is connected to the cathode of the eighth diode, the sample terminal of a delay circuit is connected to the seventh movable contact of the first relay, and its output is connected to one terminal of the second relay coil, its another terminal is connected to the negative pole of the power supply.</p> |
