Method and arrangement for controlling the output of electrical consumers connected to an AC line voltage
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United States of America Patent
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-
Sep 7, 1999
Grant Date -
N/A
app pub date -
Nov 3, 1997
filing date -
May 5, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for controlling the output of electrical consumers connected to ac voltage, especially ohmic loads such as hot-plates, fans, hot-air blowers, electric heaters and the like, wherein an electric or electronic circuit component which conducts ac voltage in both directions, preferably a triac, is connected in series with the consumer, and the output control is effected at the consumer by the given angle of the phase control. An additional electric or electronic circuit component is arranged in parallel to the first series switching element, however, the additional component is controlled first so as to conduct in a controlled manner at the trigger time determined by the device control. The current flow of the additional component is substantially taken over by the first circuit component at the latest when reaching a predetermined threshold current through the load or a threshold voltage at the load or triac.
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