Frequency control for a frequency generator of an ion engine
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United States of America Patent
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Nov 3, 2020
Grant Date -
Oct 4, 2018
app pub date -
Feb 19, 2018
filing date -
Apr 4, 2017
priority date (Note) -
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Abstract
A control device includes an acquiring unit and a processing unit. The acquiring unit acquires a voltage course and a current course of a determinable number of periods of a frequency generator and transmits these to the processing unit. The processing unit determines a temporal offset Δt1 between a rising edge of the current course and a rising edge of the voltage course for each period of the determinable number of periods, and further determines if this temporal offset Δt1 is positive or negative. The processing unit determines a difference between the number of periods with positive temporal offset and the number of periods with negative temporal offset within the determinable number of periods, and generates and adapts a switching signal for a switch-on time of the voltage course if the number of periods with positive temporal offset differs from the number of periods with negative temporal offset.
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