Electronically commutated hydraulic machine and operating method to reduce generation of resonance effects
US12372083B2 · kind B2 · utility
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2References
19Claims
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Key dates
| Filing date | Mar 9, 2021 |
| Grant date | Jul 29, 2025 |
| Priority date | — |
| Expiry date | Jul 30, 2041 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/6652
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.