| 摘要 |
The present invention relates to a vehicle's multiplex power distribution system with a power-saving circuit. The system has in one or more cable branches (2) a plurality of intelligent nodes (3) with controlled outputs for feeding consumers in a controlled manner. Power to the control electronics (6, 7) is passed via a power-saving circuit (10) including a controlled solid-state switch (M1) with a diode (D3) which is connected in series with the same and is maintained reverse-biased by a capacitor (C3). The control circuit (R1, R2, M2) of the solid-state switch (M1) includes a second solid-state switch (M2) that receives its control voltage on one hand from the microprocessor (7) of the control electronics (6, 7) via a diode (D2) and on the other hand from an awakening circuit (C1, C2, D1, R3, R4) connected between the diode (D2) and the second solid-state switch (M2), whereby the voltage of the awakening circuit goes high at the rising edge of said short-duration interruption of the supply voltage (Vpp) thus driving the second solid-state switch (M2) conductive, whereupon also the actual power-supplying solid-state switch (M1) is driven conductive. |
