Design of circular inductive pad couple with magnetic flux density analysis for wireless power transfer in EV

Abstract

As the population grows, people will consume more natural resources. This issue will lead to a low petrol supply for all land transportation, especially supplies for car consumption. Therefore, the electric vehicle (EV) has been introduced to overcome this issue. Currently, wired charging of EVs has been implemented in most of the developed country, including Malaysia. However, some drawbacks have been found from this technology. Therefore, wireless charging comes into the picture to solve this issue. Charging pad on the road and at the car are required for both wired and wireless charging. Various designs of charging pad are available. However, this paper will only focus on the circular design. There is many software that can be used to design the coil pad. Each software has a different procedure and steps to design the coil pad. In this paper, JMAG Designer software will be used to design the circular coil pad. Then, three coil pair were simulated using JMAG Designer to investigate the magnetic flux density between primary and secondary coil when varying the misalignment of 0 cm, 4 cm and 8 cm. From the simulation, there is no specific trend in the relationship between magnetic flux density and misalignment.

In-depth perception of dynamic inductive wireless power transfer development: a review

“…Nevertheless, since the elongated track will contribute to a constant coupling coefficient along the track, this type of track might lead to a decrease in PTE. Thus, the sizing of the coil itself is suggested to be built sufficiently big to encounter the problems [3], [4]. Meanwhile, a lumped track that acts as the transmitter coil is built with a length comparable with the receiver coil.…”

“…The inductively coupled coils were able to transmit an efficient power wirelessly since the coupled coils are placed with an air-gap between them (not physically connected). Recently, public awareness of green technology has become the incentive of the Malaysian government to introduce EVs broadly [3]- [5]. Previously, the EV is only able to recharge with static wireless charging (SWC) system, as illustrated in Figure 1.…”