<abstract xmlns="http://www.w3.org/1999/xhtml"><p> 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.</p></abstract>

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.

On Power Stream in Motor or Drive System

Gdańsk University of Technology 11/12 Narutowicza St. 80-233 Gdańsk,

Polish Maritime Research

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

{"article-title":"On Power Stream in Motor or Drive System"}

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...

On Power Stream in Motor or Drive System

Published Online: Jan 20, 2017

Page range: 93 - 98

DOI: https://doi.org/10.1515/pomr-2016-0074

Keywords
motors, drive systems, energy losses, energy efficiency, Sankey diagram, new research field

© 2017

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

On Power Stream in Motor or Drive System

Published Online: Jan 20, 2017

Page range: 93 - 98

DOI: https://doi.org/10.1515/pomr-2016-0074

Keywordsmotors, drive systems, energy losses, energy efficiency, Sankey diagram, new research field

© 2017

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Keywords
motors, drive systems, energy losses, energy efficiency, Sankey diagram, new research field