| 摘要 |
Sensor 1 for measuring current in a conductor 19, comprising a coil 4 on a substrate (2) comprising metallization layers with isolation (3) between, which may be a printed circuit board (PCB). The coil has at least one turn, winding around a coil axis 10 parallel to the first layer, around non-magnetic material. Each turn comprises a track 5 in the first layer connected by a via 6 to a track (7) in the second. The substrate also comprises means 11 to measure the current in the coil and may include a wireless transmitter 18. There may be an additional coil 34 connected in series with the first and also a capacitor for measuring voltage, formed from areas 12 in the conducting layers sandwiching the substrate. There may also be an inductive power pick-up coil, comprising another pattern 21 in the conductive layers, its winding axis 22 perpendicular to the first layer. |
