| 摘要 |
<p>A method for controlling the power of a load (1) powered from a source of AC voltage U having a period T using a phase control system, wherein, for a predetermined set power, a sequence of an integer p of elements, where p is greater than 1, is periodically delivered to said load (1), each element, numbered i, of the sequence being characterised by an integer ni with a half-period T/2 during which the AC voltage U is switched according to a series of different phase angles αi from α1 to αn corresponding to respective durations ti from t1 to tn during which the load (1) is cut off from the power supply. The phase angles αi of element i and αi+1 of element i+1 have similar repetitive values so that the mean current is zero over a complete cycle.</p> |
