| 摘要 |
The present invention relates to an apparatus for controlling the power of an AC voltage supplying an electrical consumer ( 14 ) by phase control and for reducing harmonics caused by said phase control, particularly within a range of 4 kHz, preferably within a range of the third harmonic, comprising a first switching element ( 12 ) (TRIAC) connected in series with said consumer ( 14 ) and driven by a control device ( 20 ) for performing a phase control. The apparatus is characterized in that a second switching element ( 34 ) connected in series with a resistor element ( 32 ) is provided, said series connection is provided parallel to the first switching element ( 12 ), and said control device ( 20 ) is adapted such that it drives the second switching element ( 34 ) shortly before the first switching element ( 12 ) and switches it in its conducting state for a short time period. The present invention also relates to a method for reducing harmonics in the range of 4 kHz, in a power control
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