Abstract
This paper presents regulation of an asynchronous induction motor so as to create a stable vacuum milk pump using Variable Frequency Drive (VFD). Contribution includes providing information about the usage of the VFD, which regulates the activity of an asynchronous induction motor so that the vacuum pump milking machine creates stable vacuum. The paper describes the functional and time dependence of input values and output parameters of frequency converters at changing electric motor speed. For simulation and verification the milking process a mathematical model of the milking machine was created. The simulation was verified in Matlab/Simulink software. The constructed mathematical model showed symmetric regulation. Control model symmetry was verified at the laboratory of milking machine. The possibility to remove the control valve from milking equipment was proven using the measured data. It was found that constant vacuum values can be maintained. A constant vacuum can be maintained by changing vacuum pump speed. This control is of an accepted standard (ISO 5707: 2007). The power saving control values (on the milking equipment) of the VFD were positive throughout the measuring range. The performance of the milking vacuum pump is normally designed from the maximum air consumption of the milking machine at nominal vacuum (50 kPa), and a performance reserve is added to this. This means that the pump is operated between the ranges 7.53 and 15.06 dm3 s−1. By using a vacuum pump controlled by a VFD, power savings can be achieved from 32.50% to 54.02% compared to a control valve.
Funder
Mendelova Univerzita v Brně
Ministerstvo Školství, Mládeže a Tělovýchovy
Publisher
Public Library of Science (PLoS)
Reference42 articles.
1. Milk flow-ependent vacuum loss in high-line milking systems: Effects on milking characteristics and teat tissue condition;Ambord;J. Dairy Sci.,2010
2. Vacuum Fluctuation in a 2×3 Tandem Milking Plant in Dependence on the Vacuum Control Method;J. FRYČ;Acta Univ. Agric. Silvic. Mendel. Brun.
3. Review: Milking machine settings, teat condition and milking efficiency in dairy cows;M. Odorčić;Animal
4. High vacuum side channel pump working against atmosphere;A. Shirinov;2011 Vacuum,2011
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
1. Neuro-Fuzzy System Modelling for Electric Drive Pump Automation Stand Operating Modes Simulation and Identification;2022 4th International Conference on Control Systems, Mathematical Modeling, Automation and Energy Efficiency (SUMMA);2022-11-09