In English

Design and analysis of wireless charging combined with conductive charging

Viktor Berntsson
Göteborg : Chalmers tekniska högskola, 2017. 74 s.
[Examensarbete på avancerad nivå]

One way to reduce the amount of emissions from vehicles is to replace the combustion cars with electrical vehicles. To encourage people to do this the electrical vehicles needs to be improved but also the way of charging them. It is necessary that the way of charging an electrical vehicle is both more efficient and convenient than filling the gas tank of a combustion car. This is one argument to convince people that electrical vehicles are an adequate alternative instead of the combustion cars. Inductive charging will make the charging procedure easier due to that the driver only needs to park over the charging plate and then leave the car. This is an easier way of charging an electrical vehicle due to that the driver does not have to do anything except park the car compared to conductive charging where the driver needs to plug in the cable every time the vehicle needs to be charged. In this thesis, a new concept of charging will be brought up where the driver can choose between charging wirelessly or through a cable with the same system. This is done by designing and simulating one inductive and three conductive systems separately. These systems will then be combined into one system which can handle both inductive and conductive charging. The systems are designed for 3.3 kW and the simulations shows an efficiency between 85.98 − 92.53% for the inductive system and an efficiency between 92.84 − 98.42% for the conductive systems. The inductive system will have a high leakage inductance, therefore capacitor banks are placed in series with the coils for the inductive system to increase the amount of transferred power between the coils. The inductive system is calculated to cost 4695 SEK and the conductive systems is calculated to cost between 3485 − 3820 SEK. By combining these two system it is predicted that the combined system is going to be able to handle both inductive and conductive charging to the cost of approximate 73 % of two separate systems without affecting the performance.

Nyckelord: Inductive power transfer, Inductive charging, conductive charging, electric vehicle charger

Publikationen registrerades 2017-12-07. Den ändrades senast 2017-12-07

CPL ID: 253618

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