| 摘要 |
<p>A method is disclosed for controlling the power being supplied to a load (L,L') from an AC voltage source (V,V') by means of a static switch (I,I') comprising at least one controllable one-way switching element (T,T1,T2) and a rectifier (P,D1,D2) connected to said switching element and the source in series with the load. This method provides for the static switch (I,I') to make and break during each half-wave of the voltage supply (V,V') at first and second preset times, respectively. The first or make preset time is selected to have, at the first half-wave of the voltage supply that appears on the static switch upon activation thereof, a first predetermined lag (t0) from the moment the voltage across the static switch (I,I') is zero, and thereafter with the static switch connected to the source, a second predetermined lag (t2) from the moment the current (IT) flowing through the static switch is zero. The second or break preset time is selected to be coincident with the time when the current (IT) flowing through the static switch is zero. A device operating on the above-outlined method can be used without problems at full power, and is reliable and compact. <IMAGE></p> |
