Abstract
In this paper, a study of the bidirectional efficiency of linear and nonlinear physical systems is performed. The methodology to compute the bidirectional efficiency map of the system is described, highlighting which is the power flow orientation giving the maximum system efficiency. The designer can therefore easily evaluate whether a physical system, such as for instance an electric machine, is more suitable for being used in forward motor mode rather than in reverse generator mode or viceversa. Three different types of physical systems are modeled and simulated in Matlab/Simulink, and the different characteristics they exhibit in terms of efficiency are highlighted. Finally, the properties that the efficiency maps exhibit if the linear system is affected by symmetric or nonsymmetric nonlinearities are studied and commented in detail.
Highlights
The problem of addressing the physical systems efficiency evaluation is of primary importance in all industrial application segments, including smart-grid applications, automotive and agricultural industries and all companies making mechatronic systems
In [2], the authors propose an energy efficiency evaluation system, while in [3] two types of electric machines are considered in order to make a comparison between the efficiency maps
The designer can use this analysis to compute the bidirectional efficiency maps of the system both on the plane of the input power variables and on the plane of the output power variables, so as to identify the power flow orientation maximizing the area of the high-efficiency operating regions and to understand whether the system is more suitable for being used in forward power flow or in reverse power flow mode
Summary
The problem of addressing the physical systems efficiency evaluation is of primary importance in all industrial application segments, including smart-grid applications, automotive and agricultural industries and all companies making mechatronic systems. The work presented in this paper represents an extent of the power flow-based efficiency evaluation from the unidirectional case in [4] to the bidirectional case, allowing to characterize the physical systems in all the possible operating modes. The bidirectional efficiency analysis is applied to these considered physical systems and the different characteristics that they exhibit in terms of efficiency are analyzed and commented in detail with the support of some simulation results. V reports the conclusions of the work presented in this paper
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
