Losses and energy efficiency of drive motors and systems. Replacement of the Sankey diagram of power decrease in the direction of power flow by a diagram of power increase oppo site to the direction of power flow opens a new perspective of research of drive motors and systems

• Autorzy: Paszota Z.
• Języki publikacji: EN

Abstrakty

EN

Losses and energy efficiency of every drive motor must be presented as functions of physical quantities independent of losses in the motor. Such quantities are speed and load required by the machine or device driven by the motor, changing in the drive operating field. Speed and load of the motor decide of the instantaneous useful power of the motor and also in a differentiated way of kinds and values of losses occurring in the motor. However, losses and energy efficiency of the hydrostatic drive motors and systems are evaluated by researchers and manufacturers as functions of parameters depending on the losses. The basic cause of such situation is the traditional, commonly accepted but erroneous, view of the power flow in the drive motors and systems represented by the Sankey diagram of power decrease in the direction of power flow. It is necessary to replace the Sankey diagram by the proposed diagram of increase of power in the motor and in the drive system in the direction opposite to the direction of power flow. The proposed view of losses and energy efficiency should be applied to all types of motor and drive systems. The aim of this paper is showing the resulting problems of the above postulates, exemplified by operation of a rotational displacement motor in a hydrostatic drive system. In order to make possible objective evaluation of the energy behaviour of different motor and system solutions and sizes, the losses and energy efficiency should be described and compared as dependent on the motor speed coefficient ωM and load coefficient changing in the drive system operating field (0 ≤ ωM< ωMmax, 0 ≤ M< Mmax). The presented proposals open a new perspective of unavoidable research of drive motors and systems, making it possible to compare objectively the energy efficiency of different types of motors and drive systems.

Słowa kluczowe

EN

drive motors; drive systems; energy losses; energy efficiency; Sankey diagram; new research field

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2013
• Tom: nr 1
• Strony: 3--10
• Opis fizyczny: Bibliogr. 23 poz., rys.

Twórcy

autor

Paszota Z.

• Faculty of Ocean Engineering and Ship Technology Gdansk University of Technology Narutowicza 11/12 80-233 Gdansk, POLAND

Bibliografia

• 1. Paszota Z.: Graphical presentation of the power of energy losses and power developed in the elements of hydrostatic drive and control system. Part I – Rotational hydraulic motor speed series throttling control systems. Chapter in the monograph: „Research, design, production and operation of hydraulic systems” (in Polish), Adam Klich, Edward Palczak and Andrzej Meder editors. „Cylinder” Library. Komag Mining Mechanisation Centre, Gliwice 2008
• 2. Paszota Z.: Graphical presentation of the power of energy losses and power developed in the elements of hydrostatic drive and control system. Part II – Rotational hydraulic motor speed parallel throttling control and volumetric control systems. Chapter in the monograph: „Research, design, production and operation of hydraulic systems” (in Polish), Adam Klich, Edward Palczak and Andrzej Meder editors. „Cylinder” Library. Komag Mining Mechanisation Centre, Gliwice 2008
• 3. Paszota Z.: Direction of increase of power stream in the hydrostatic drive and control system. Graphical presentation of the power of energy losses and power developed in the elements of hydrostatic drive and control system. Part I – Rotational hydraulic motor speed series throttling control systems (in Polish), Napędy i sterowanie, scientific monthly, No 10 (114), October 2008
• 4. Paszota Z.: Direction of increase of power stream in the hydrostatic drive and control system. Graphical presentation of the power of energy losses and power developed in the elements of hydrostatic drive and control system. Part II – Rotational hydraulic motor speed parallel throttling control and volumetric control systems (in Polish), Napędy i sterowanie, scientific monthly, No 11 (115), November 2008
• 5. Paszota Z.: Graphical presentation of the power of energy losses and power developed in the elements of hydrostatic drive and control system. Part I – Rotational hydraulic motor speed series throttling control systems. Polish Maritime Research 3 (57) 2008, Vol. 15
• 6. Paszota Z.: Graphical presentation of the power of energy losses and power developed in the elements of hydrostatic drive and control system. Part II – Rotational hydraulic motor speed parallel throttling control and volumetric control systems. Polish Maritime Research 4 (58) 2008,Vol. 15
• 7. Paszota Z.: The operating field of a hydrostatic drive system. Chapter in the monograph: „Research, design, production and operation of hydraulic systems” (in Polish), Adam Klich, Antoni Kozieł and Edward Palczak editors. „Cylinder” Library. Komag Mining Mechanisation Centre, Gliwice 2009
• 8. Paszota Z.: Parameters of the energy efficiency investigations of pumps and hydraulic motors. The operating field of a hydrostatic drive system (in Polish), Napędy i sterowanie, scientific monthly, No 11 (127), November 2009
• 9. Paszota Z.: The operating field of a hydrostatic drive system parameters of the energy efficiency investigations of pumps and hydraulic motors. Polish Maritime Research 4 (62) 2009, Vol. 16
• 10. Paszota Z.: Energy losses in a rotational hydraulic motor – definitions and relations for evaluation of the efficiency of motor and hydrostatic drive. Chapter in the monograph: „Research, design, production and operation of hydraulic systems” (in Polish), Adam Klich, Antoni Kozieł and Edward Palczak editors. „Cylinder” Library. Komag Mining Mechanisation Centre, Gliwice 2010
• 11. Paszota Z.: Theoretical and mathematical models of the torque of mechanical losses in a hydraulic rotational motor for hydrostatic drive. Chapter in the monograph: „Research, design, production and operation of hydraulic systems” (in Polish), Adam Klich, Antoni Kozieł and Edward Palczak editors. „Cylinder” Library. Komag Mining Mechanisation Centre, Gliwice 2010
• 12. Paszota Z.: Energy losses in a rotational hydraulic motor – definitions and relations for evaluation of the efficiency of motor and hydrostatic drive (in Polish), Napędy i sterowanie, scientific monthly, No 10 (138), October 2010
• 13. Paszota Z.: Theoretical and mathematical models of the torque of mechanical losses in a hydraulic rotational motor for hydrostatic drive (in Polish), Napędy i sterowanie, scientific monthly, No 11(139), November 2010
• 14. Paszota Z.: Energy losses in the hydraulic rotational motor – definitions and relations for evaluation of the efficiency of motor and hydrostatic drive. Polish Maritime Research 2 (65) 2010,Vol. 17
• 15. Paszota Z.: Theoretical and mathematical models of the torque of mechanical losses in a hydraulic rotational motor for hydrostatic drive. Polish Maritime Research 3 (66) 2010,Vol. 17
• 16. Paszota Z.: Hydrostatic drives as safe and energy saving machines (in Polish), Napędy i sterowanie, scientific monthly, No 1(141), January 2011
• 17. Paszota Z.: Hydrostatic drives as safe and energy saving machines (in Polish), Proceedings of the „Innovative machines and Technologies - Safety” conference, Szczyrk 03 – 04 February 2011
• 18. Paszota Z.: Hydrostatic drives as safe and energy saving machines. The drive investigation method compatible with the diagram of power increase opposite to the direction of power flow. Polish Maritime Research 1(68) 2011,Vol. 18
• 19. Paszota Z.: Theoretical and mathematical models of the torque of mechanical losses in the pump used in a hydrostatic drive. Polish Maritime Research 4(71) 2011, Vol. 18,
• 20. Paszota Z.: Effect of the working liquid compressibility on the picture of volumetric and mechanical losses in a high pressure displacement pump used in a hydrostatic drive. Part I Energy losses in a drive system, volumetric losses in a pump. International Scientific-Technical Conference Hydraulics and Pneumatics, Wrocław, 16 – 18 May 2012. Ośrodek Doskonalenia Kadr SIMP - Wrocław: ODK SIMP Wrocław, 2012,
• 21. Paszota Z.: Effect of the working liquid compressibility on the picture of volumetric and mechanical losses in a high pressure displacement pump used in a hydrostatic drive. Part II Mechanical losses in a pump /International Scientific-Technical Conference Hydraulics and Pneumatics, Wrocław, 16 – 18 May 2012 / Ośrodek Doskonalenia Kadr SIMP - Wrocław: ODK SIMP Wrocław, 2012,
• 22. Paszota Z.: Effect of the working liquid compressibility on the picture of volumetric and mechanical losses in a high pressure displacement pump used in a hydrostatic drive. Part I Energy losses in a drive system, volumetric losses in a pump. Polish Maritime Research 2(73), 2012, Vol.19,
• 23. Paszota Z.: Effect of the working liquid compressibility on the picture of volumetric and mechanical losses in a high pressure displacement pump used in a hydrostatic drive. Part II Mechanical losses in a pump. Polish Maritime Research 3(75), 2012, Vol.19.