Power supply frequency converter
First Claim
1. Apparatus for converting a supplied alternating current (AC) input signal into an AC output signal having a selected lower frequency than the frequency of said AC input signal, comprising:
- means for translating individual half cycles of said supplied AC input signal to an intermediate output signal with selected amplitude and polarity such that during successive pairs of first and second periods, each said period corresponding to a predetermined number of half cycles of said AC input signal, the translated half cycles of said AC input signal all have the same first selected polarity during said first periods and have the same second selected polarity during said second periods, said first and second polarities being opposites; and
means for filtering said intermediate output signal to develop said AC output signal having said selected lower frequency.
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Abstract
The present invention achieves the above objects, among others, by providing apparatus for converting a supplied AC input signal into an AC output signal having a selected lower frequency than the frequency of the AC input signal, which apparatus translates individual half cycles of the supplied AC input signal to an intermediate output signal with selected amplitude and polarity such that during successive pairs of first and second periods, each such period corresponding to a predetermined number of half cycles of the AC input signal, the translated half cycles of the AC input signal all have the same first selected polarity during each first period and have the same second selected polarity during each second period, with the first and second polarities being opposite. The apparatus filters the intermediate output signal to develop the AC output signal having the selected lower frequency. Thus, the frequency of the AC output signal will be a selected fraction of the frequency of the AC input signal, the fraction being equal to the frequency of the AC input signal divided by the predetermined selected number of half cycles.
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Citations
5 Claims
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1. Apparatus for converting a supplied alternating current (AC) input signal into an AC output signal having a selected lower frequency than the frequency of said AC input signal, comprising:
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means for translating individual half cycles of said supplied AC input signal to an intermediate output signal with selected amplitude and polarity such that during successive pairs of first and second periods, each said period corresponding to a predetermined number of half cycles of said AC input signal, the translated half cycles of said AC input signal all have the same first selected polarity during said first periods and have the same second selected polarity during said second periods, said first and second polarities being opposites; and means for filtering said intermediate output signal to develop said AC output signal having said selected lower frequency. - View Dependent Claims (2, 3, 4, 5)
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Specification