| 20080204964 | Bistable Contactor Drive Circuit - A bistable contactor drive circuit is provided. 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 a positive electrode of the power supply, a first normally opened contact and a sixth normally closed contact are connected to a negative electrode of the power supply, a second movable contact is connected to a positive electrode of the bistable contactor coil, and a seventh movable contact thereof is connected to a seventh movable contact of a second relay. A negative electrode of the bistable contactor coil is connected to a second movable contact of the second relay. A third normally closed contact of the second relay is connected to a cathode of a seventh diode, a sixth normally closed contact is connected to an anode of the seventh diode, a first normally opened contact is connected to an anode of an eighth diode, an eighth normally opened contact is connected to a cathode of the eighth diode. A sampling end of a delay circuit is connected to the seventh movable contact of the first relay, and an output end thereof is connected to one end of the second relay coil. The other end of the second relay coil is connected to the negative electrode of the power supply. The circuit according to the present invention has advantages of stable and reliable performance, simple circuit, low cost and no energy loss before and after the control process. | 08-28-2008 |
