| 摘要 |
Method for reducing the inrush current of an inductive load, particularly a transformer, comprising the following steps: • a) connecting a DC power source (4) to the transformer for a time tc, to magnetize its magnetic core until saturation is reached, and connecting the transformer to the AC mains by means of an electromechanical switch (6), in an initially open position; • b) disconnecting the transformer from the DC power source (4), the magnetic flux being reduced to its residual value; • c) closing the electromechanical switch (6) to complete the connection, this connection point being determined by the phase angle selected from the sinusoidal signal of the voltage mains, in such a way that magnetic flux corresponding to the steady state voltage equals the residual magnetic flux that remains when the transformer is disconnected from the DC power source (4). |
