| 摘要 |
In a power supply system supplying several loads (10, 11, 12) using a joint power bus (LB) and connecting electronic control units (muC) with each other and the loads by means of a control bus (CAN) for digital information and control data, a measuring resistor (21) connected in series with the power bus measures the total current of the loads connected, measurement information is transferred on the control bus (CAN), and the differential current resulting from a switching process is evaluated by the control system. The measuring resistor (21) comprising a metal alloy is integrated with a semiconductor chip with heat conducting connection directly or via a printed circuit board (PCB), which contains the whole evaluation and transmission electronics, into a small, compact current measuring module.
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