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Computationally efficient modeling for assessing the energy efficiency of electric drivetrains using convex formulations

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Abstract
High-fidelity models capturing the dynamical behavior can be engaged for the analysis of complex mechatronic systems. Determining the optimal control parameters and design characteristics of such systems necessitates solving multiple interconnected models acting on their respective physical domains and time scales. In this paper, high-fidelity physics-based models are constructed for several electrical subsystems. Loss mechanisms in the various components are inferred because these are key when performing optimal design and control in terms of energy-efficient conversion from power source to actuation. The complexity of the analyzed models is then reduced by introducing convex approximations for the occurring dissipation during power transfers, allowing abstracting the complicated dynamic behavior into a tractable convex formulation, specifically suited for time-efficient numerical simulation. The effectiveness of the strategy is demonstrated on a case study originating from the field of all-electric vehicles, embodying a series interconnection of a battery stack, a buck-boost converter, a voltage source inverter, and an asynchronous electric motor. Results show that the dynamic simulation of the proposed system, composed of multiple time scales, can be reliably computed using the composed convex mappings, hereby reducing the computational time approximately by a factor 461, compromising only 1.8% accuracy regarding energy consumption assessment. The introduced convex formulation can therefore constitute the foundation for optimal control and design of complex mechatronic drives.

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Chicago
Vandeputte, Matthias, Arne De Keyser, and Guillaume Crevecoeur. 2019. “Computationally Efficient Modeling for Assessing the Energy Efficiency of Electric Drivetrains Using Convex Formulations.” International Journal of Numerical Modelling-electronic Networks Devices and Fields.
APA
Vandeputte, M., De Keyser, A., & Crevecoeur, G. (2019). Computationally efficient modeling for assessing the energy efficiency of electric drivetrains using convex formulations. INTERNATIONAL JOURNAL OF NUMERICAL MODELLING-ELECTRONIC NETWORKS DEVICES AND FIELDS.
Vancouver
1.
Vandeputte M, De Keyser A, Crevecoeur G. Computationally efficient modeling for assessing the energy efficiency of electric drivetrains using convex formulations. INTERNATIONAL JOURNAL OF NUMERICAL MODELLING-ELECTRONIC NETWORKS DEVICES AND FIELDS. 2019;
MLA
Vandeputte, Matthias, Arne De Keyser, and Guillaume Crevecoeur. “Computationally Efficient Modeling for Assessing the Energy Efficiency of Electric Drivetrains Using Convex Formulations.” INTERNATIONAL JOURNAL OF NUMERICAL MODELLING-ELECTRONIC NETWORKS DEVICES AND FIELDS (2019): n. pag. Print.
@article{8529397,
  abstract     = {High-fidelity models capturing the dynamical behavior can be engaged for the analysis of complex mechatronic systems. Determining the optimal control parameters and design characteristics of such systems necessitates solving multiple interconnected models acting on their respective physical domains and time scales. In this paper, high-fidelity physics-based models are constructed for several electrical subsystems. Loss mechanisms in the various components are inferred because these are key when performing optimal design and control in terms of energy-efficient conversion from power source to actuation. The complexity of the analyzed models is then reduced by introducing convex approximations for the occurring dissipation during power transfers, allowing abstracting the complicated dynamic behavior into a tractable convex formulation, specifically suited for time-efficient numerical simulation. The effectiveness of the strategy is demonstrated on a case study originating from the field of all-electric vehicles, embodying a series interconnection of a battery stack, a buck-boost converter, a voltage source inverter, and an asynchronous electric motor. Results show that the dynamic simulation of the proposed system, composed of multiple time scales, can be reliably computed using the composed convex mappings, hereby reducing the computational time approximately by a factor 461, compromising only 1.8\% accuracy regarding energy consumption assessment. The introduced convex formulation can therefore constitute the foundation for optimal control and design of complex mechatronic drives.},
  author       = {Vandeputte, Matthias and De Keyser, Arne and Crevecoeur, Guillaume},
  issn         = {0894-3370},
  journal      = {INTERNATIONAL JOURNAL OF NUMERICAL MODELLING-ELECTRONIC NETWORKS DEVICES AND FIELDS},
  language     = {eng},
  title        = {Computationally efficient modeling for assessing the energy efficiency of electric drivetrains using convex formulations},
  url          = {http://dx.doi.org/10.1002/jnm.2275},
  year         = {2019},
}

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