Abstract
This paper proposes the algorithm to control the current ratio of the transmitting (Tx) coils for proper power distribution to the two receiving (Rx) coils in wireless power transfer (WPT) system. The proposed algorithm assumes that each Rx coil appears at different times to consider the situation where multiple users request power transmission as practically as possible. That is, suppose the second Rx coil enters the charging space later than the first Rx coil. When each coil enters the charging space, only the Tx coil is used to obtain the value required for calculation. Using the obtained result, the optimized Tx coil current is calculated by the proposed algorithm and proper power distribution to both Rx coils is achieved. Three Tx coils and two Rx coils are constructed using the ANSYS MAXWELL simulation tool. As a result of applying the proposed algorithm, it was confirmed that a similar level of power was transmitted between 40∼60%, respectively. The sum of the power transmitted to the two Rx coils also appeared as more than 75%.
Highlights
Wireless power transfer (WPT) system is used in various fields such as medical devices, vehicles, and mobile devices [1,2,3,4,5,6]
A fair power distribution to each Rx coil is much more important than maximizing the sum of the power transmitted to all Rx coils
We propose a Tx coil control algorithm considering the situation where multiple users request power transmission at the same time and there is no communication between Tx and Rx
Summary
Wireless power transfer (WPT) system is used in various fields such as medical devices, vehicles, and mobile devices [1,2,3,4,5,6]. There is a situation in which power transmission is needed in parking lots with various types of vehicles such as electric vehicles and electric bicycles Since they will have different charging specifications, the above method is suitable for charging multiple devices. We propose a Tx coil control algorithm considering the situation where multiple users request power transmission at the same time and there is no communication between Tx and Rx. The proposed algorithm is designed so that power can be delivered fairly to multiple users and the overall PTE is not reduced too much at the same time. The proposed algorithm has a higher performance compared to another reference that proposes an algorithm that considers power distribution [12], which achieves more than 60% of the sum of PTE at the same distance with our simulation (5 cm) between Tx and Rx coils.
Sign-in/Register to view highlights & summary 
Published Version (
Free)
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