In a motor or a drive system the quantity of power increases in the direction opposite to the direction of power flow. Energy losses and energy efficiency of a motor or drive system must be presented as functions of physical quantities independent of losses. Such quantities are speed and load. But the picture of power stream in a motor or drive system is presented in the literature in the form of traditional Sankey diagram of power decrease in the direction of power flow. The paper refers to Matthew H. Sankey’s diagram in his paper „The Thermal Efficiency of Steam Engines“ of 1898. Presented is also a diagram of power increase in the direction opposite to the direction of power flow. The diagram, replacing the Sankey’s diagram, opens a new prospect for research into power of energy losses and efficiency of motors and drive systems.
 EN 61800-3:2004. Adjustable speed electrical power drivesystems. Part 3. EMC requirements and specific test methods .
 EN 61000-2-2:2002. Electromagnetic compatibility (EMC). Part 2-2. Environment. Compatibility levels for low-frequency conducted disturbances and signalling in public low-voltage power supply systems .
 EN 61000-2-4:2004. Electromagnetic compatibility (EMC). Part 2-4. Environment. Compatibility levels in industrial plants for low-frequency conducted disturbances .
 EN 61000
] ORŁOWSKA-KOWALSKA T., TARCHAŁA G., DYBKOWSKI M., Sliding-Mode Direct Torque Control and Sliding-Mode Observer with magnetizing reactance estimator for induction motor drive, Mathematics and Computers in Simulation, Vol. 98, 2014, 31-45.
 KAMIŃSKI M., ORŁOWSKA-KOWALSKA T., Adaptive Neural Speed Controllers Applied for a DriveSystem with an Elastic Mechanical Coupling - a Comparative Study, Engineering Applications of Artificial Intelligence, October 2015, Vol. 45, 152-167.
 WRÓBEL K., SERKIES P.J., Predictive position controller
Replacement of the Sankey diagram of power decrease in the direction of power flow by a diagram of power increase opposite to the direction of power flow opens a new perspective of research of drive motors and systems
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 drivesystem . 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
underwater robot ever replace the diver? A rather poor progress or a great success?; Polish Hyperbaric Research No. 1, Vol. 54 2016, pp. 7-18, ISSN 1734-7009, DOI: 10.1515/phr-2016-0001;
18. Olejnik A.: Trends in the development of unmanned marine technology; Polish Hyperbaric Research No. 2, Vol. 55 2016, pp. 7-28, ISSN 1734- 7009, DOI: 10.1515/phr-2016-0008;
19. Olejnik A., Chrabąszcz P.: Studies on the drivesystem of a prototypical remotely controlled underwater vehicle; Polish Hyperbaric Research No. 3(36) 2011 pp. 7 - 34; ISSN 1734
Paszota Z.: Power of energy losses in the hydrostatic drivesystem elements - definitions, relations, range of changes, energy efficiencies. Part I - Hydraulic motor. Chapter in the monograph: "Research, design, production and operation of hydraulic systems " (in Polish), Andrzej Meder and Adam Klich editors. "Cylinder" Library. Komag Mining Mechanisation Centre, Gliwice 2007
Paszota Z.: Power of energy losses in the hydrostatic drivesystem elements - definitions, relations, range of changes
 Paszota, Z., Model of losses and energy efficiency of the hydraulic system with proportional control of the hydraulic cylinder supplied with a constant capacity pump in a variable pressure system , Chapter in monograph: „Research, construction, manufacture and operation of hydraulic systems”, pp. 145-162, Komag, Gliwice 2005.
 Paszota, Z., On power stream in motor or drivesystem , Polish Maritime Research, Vol. 4, pp. 93-98, Gdansk 2016.
 Paszota, Z., Energy losses in hydrostatic drive. Drive investigation method
gain value for the electrical drive with an elastic joint, IEEE Trans. Ind. Electr., 2010, 57(4), 1309-1317.
 BROCK S., Hybrid P-PI sliding mode position and speed controller for variable inertia drive, Przegl. Elektrotechn., 2014, 90(5), 29-34.
 JINKUN L., XINHUA W., Advanced Sliding Mode Control for Mechanical Systems, Springer, Tsinghua University Press, 2012.
 DRÓŻDŻ K., Adaptive control of the drivesystem with elastic coupling using fuzzy Kalman filter with dynamic adaptation of selected coefficients
The paper shows a typical drive systems used in today's vehicles, mainly cars. Approximated scheme of the formation of the driving force of the vehicle and the necessary mathematical relations for the calculation. For example, a typical passenger car BMW 320 was analyzed and calculations obtained a driving force, of adhesion and acceleration. The calculations were performed for the drive system, the classical (i.e. the rear axle of the vehicle) for front-wheel drive and four-wheel drive (4×4). Virtually assumed that to the above mentioned vehicle it is possible buildings of each of said system. These are shown graphically in diagrams bearing a distribution of the forces acting on the substrate and the reactions - the data necessary for the calculations. The resulting calculation is graphically shown in the diagrams, in which is illustrated a change value of the resulting adhesive strength, and the acceleration depending on the drive type vehicle.
Design with MATLAB , CRC Press by Taylor & Francis Group, LLC, 2009.
 Pawelski, Z., Zdziennicki, Z., Model of vehicle electric drivesystem , Journal of KONES Powertrain and Transport, Vol. 24, No. 3, pp. 211-220, 2017.