Rudolf Scheidl, Matthias Scherrer,
"Hydraulic Control of a Buck Converter"
: Proceedings of the ASME 2019 ASME/BATH Symposium on Fluid Power and Motion Control FPMC2021 October 19 ? 21, 2021, Virtual Conference, ASME, Seite(n) FPMC2021-68682, 10-2021
Original Titel:
Hydraulic Control of a Buck Converter
Sprache des Titels:
Englisch
Original Buchtitel:
Proceedings of the ASME 2019 ASME/BATH Symposium on Fluid Power and Motion Control FPMC2021 October 19 ? 21, 2021, Virtual Conference
Original Kurzfassung:
Primary control of linear motion by variable speed electric motors driving a hydraulic cylinder via a constant displacement pump is an established and successful concept with a frequent use in industry. One problem arises when low or zero motion speed has to be realized under high pump pressure conditions. Such load scenarios occur frequently in certain pressing processes, e.g. for sintering or veneering. Most pumps have a lower speed limit, below which critical tribological conditions occur which impair lifetime and efficiency. Also pump speed control and pump fluctuation suffer from the mixed lubrication conditions in such operation range. For a circumvention of such low speed pump operation a digital valve control concept is presented and studied in this paper. Valve control is used in load holding phases with low speed. Pressure is provided by an accumulator which is charged by the pump in short charging cycles as reasonable pump speeds. It is shown that a good performance in terms of load control can be achieved comparable to pump control and that unfavorable pump operation conditions can be avoided.
Forschungs-