ELECTRONICALLY COMMUTATED HYDRAULIC MACHINE AND OPERATING METHOD TO REDUCE GENERATION OF RESONANCE EFFECTS
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United States of America Patent
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Issued Date -
Apr 20, 2023
app pub date -
Mar 9, 2021
filing date -
Mar 9, 2021
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Abstract
A hydraulic apparatus including an electronically commutated machine having a plurality of working chambers which are controlled on each cycle of working chamber volume to carry out active or inactive cycles of working chamber volume allows only a plurality of defined fractions of cycles to be active cycles to avoid generating frequencies of active cycles which cause low frequency resonances. The demand signal may be quantised into fractions m/n where n is an integer below a threshold selected to avoid repeating patterns of active cycles of more than a cut-off length.
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