Design of a vacuum pump control by a frequency converter and checks of its parameters on a functional model

• Autorzy: Fryč J.
• Języki publikacji: EN

Abstrakty

EN

The paper deals with a possible energy saving on milking machines by changing the method of vacuum regulation and by controlling the run of the vacuum pump electric motor by a frequency converter. The work was focused on defining working parameters of a newly designed device and on measuring energy consumption. The device works on the principle of a pressure-reducing valve, the vacuum pump vacuum being higher than the milking machine working vacuum. First of all it was necessary to find the minimum difference between both vacuums. Based on the measurements implemented the minimum value of the differences, i.e 4 kPa, was suggested at which energy consumption on a model device was measured. The values obtained by using the suggested regulating device and frequency converter were compared with the values obtained by using a standard control valve and without frequency converter. A 23% energy saving was lower than expected being evidently caused by the vacuum pump of a low efficiency as in this case also small losses markedly affect the re-sults. In spite of it experiments made confirmed a possible energy saving by using a frequency converter for driving vacuum pump elec-tric motor of a milking machine.

Słowa kluczowe

EN

milking machine; energy saving; frequency converter; vacuum control

PL

dojarka; oszczędność energii; przetwornica częstotliwości; kontrola próżni

• Wydawca: Polskie Towarzystwo Inżynierii Rolniczej
• Czasopismo: Inżynieria Rolnicza
• Rocznik: 2002
• Tom: R. 6, nr 5, cz. 1
• Strony: 369--376
• Opis fizyczny: Bibliogr. 3 poz., rys.

Twórcy

autor

Fryč J.

• Mendel University of Agriculture and Forestry

Bibliografia

• Fryč J. 2002. Vacuum regulation in milking machines by unit with pressure-reducing valve and assessment of its basic parameters. Research in Agricultural Engineering, 48, 7-11.
• Fryč J. Kukla R. Los, J. 2000. Rational energy transformation in a set of vacuum pumps. Acta Mechanica Slovaca, 4, No. 3, pp. 49-52.
• Přikryl M., Maloun J., Klima J. 1994. Derating of Comparative Electric Energy Consumption in Blade Vacuum Pumps for Milking Machines. In: XII CIGR World Congress and Aceng 94 Conference on Agricultural Engeneering, Milan, Italy, p. 900.