| 摘要 |
The invention relates to a circuit for generating a supply voltage (UA) for an electric consumer, such as evaluating electronics, from the magnetic field surrounding a conductor (2) through which current flows. The inventive circuit comprises a current transformer (M) whose primary winding is formed by the conductor (2) through which current flows. The circuit also comprises a rectifier (6) which is connected in outgoing circuit from the secondary winding (4) of the current transformer, and comprises a storage capacitor (8) as well as a regulating circuit (9), said regulating circuit regulating the power supply voltage (UA) applied to the storage capacitor (8), which, via a diode (7), are also connected in outgoing circuit from the secondary winding of the current transformer. The current transformer (M) can be controlled in the magnetic saturation thereof by all intensities of current anticipated in the conductor (2), and an inductor (L) is connected in incoming circuit from said rectifier (6).
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