Electromagnetic Evaluation and Optimization of a Combined Inductive Power Transfer and Inductive Healing Road

Electromagnetic Evaluation and Optimization of a Combined Inductive Power Transfer and Inductive Healing Road

Visser, E.R.A.

Bauer, P. (mentor)
Prasanth, V. (mentor)

Electrical Engineering, Mathematics and Computer Science

Electrical Sustainable Energy

2016-08-31

Electrical vehicles (EVs) can be charged wirelessly with an inductive power transfer (IPT) system that uses a magnetic field to deliver power to the EV. Such a system could be embedded in the highway to charge EVs while they are driving. The magnetic field of the IPT system is created using coils that are exited with a high frequency current. Recent developments has created a low maintenance asphalt that can be healed by means of induction heating. Steel wool is added to the asphalt to make it suitable for induction heating, which is also done using coils that are exited with high frequency currents. This thesis will investigate the feasibility of a combined inductive healing asphalt (IHA) and IPT highway. The main goal will be to reduce the losses in the IHA for an efficient operation of the IPT system, while maintaining the possibility to heat the asphalt by means of induction heating when desired. Also a preliminary economical analysis to estimate the financial profit of a low maintenance road is performed. A detailed loss model for IPT systems is created that is used to describe the power transfer efficiency and predict the losses in the asphalt. Four concepts are suggested to obtain a feasible combination, which are (1) a sectioned road that separates the IPT and the IHA systems in the geometry, (2) IHA with anisotropic conductivity and permeability, (3) asphalt with dedicated heating elements and (4) asphalt with frequency dependent hysteresis losses. The loss models are verified using an experimental setup, which shows that the models created for concepts (1)-(3) provide an accurate description of the system. Based on the models and the experimental results it is concluded that the concepts (1) and (3) can provide a feasible combination of an IHA highway in combination with IPT systems. The design of such a highway would however need careful considerations with respect to the dimensioning of the systems and external sources might be needed to apply induction healing for some parts of the highway. The result of the preliminary economical analysis shows that the expected reduction in maintenance will be more than the additional implementation costs and therefore the concepts are also economically feasible.

Inductive Power Transfer
Induction Heating
Inductive Healing Asphalt
Low Maintenance Road

http://resolver.tudelft.nl/uuid:560e5165-b15a-44d0-93cf-fe34040a2b6c

2017-08-31

Student theses

master thesis

(c) 2016 Visser, E.R.A.