Sensorless Control of the Charging Process of a Dynamic Inductive Power Transfer System With an Interleaved Nine-Phase Boost Converter

Abstract

The paper proposes a technique for the control of the charging process in a dynamic inductive power transfer system for automotive applications. This technique is based on an impedance control loop on the receiver side. The proposed control allows to carry out the different phases of the charging process in absence of a communication link between ground and vehicle side. The charging process starts with a sensorless procedure for the identification of the actual presence of the vehicle over the receiver. The same control technique introduces several advantages in terms of interoperability between systems having different requirements in terms of power demand. A 11 kW prototype has been implemented based on a transmitter 1.5 meters long as compromise solution between the long track coil and the lumped one. The power management of the receiver side is provided by a nine-phase interleaved boost converter. The experimental results prove the effectiveness of the proposed control together with a good matching with the developed theoretical equations set for the system description.

Life Cycle Assessment of an On-Road Dynamic Charging Infrastructure

“…POLITO developed the charge while driving (CWD) solution, which is based on the dynamic wireless resonant inductive coupling principle [38]. The details on the layout are presented in [38][39][40][41]. Hereafter, a simple, brief description is given to help understand the system and the subsequent LCI.…”

Behavioral Switching Loss Modeling of Inverter Modules

“…In this paper, such n×m data vectors are the training data set Τ used for switching power loss model identification. The main goal is to identify the behavioral model (11): (11) such that the value of the function F computed for each test condition of the training data set T is as close as possible to the corresponding analytical model-based value yij, i {1,…,n} and j {1,…,m}. In formula (11), p is a vector of numeric coefficients, given as a function of (Vdr, Rg).…”

“…1 shows the circuit schematic of a phase-shifted fullbridge inverter with resonant load represented by the equivalent impedance ŻT. The phase-shifted control involves a phase-lag in the control signals of the two full-bridge arms [11]. For the first harmonic approximation, the inverter output voltage and current are related to each other as As a result, square-wave voltage and quasi-sinusoidal current waveforms are achieved at the inverter output, as shown in Fig. 2.…”

Power Stabilization Based on Asymmetric Transceiver in Dynamic Wireless Charging System with Short-Segmented Transmitting Coils for Inspection Robots

“…Research on wireless power transmission technology based on magnetic coupling mainly include the high frequency inverters [3,4], magnetic couplers [5,6], compensation circuits [7,8], power rate promotion [9,10], and the electromagnetic safety issue [11,12]. This technology is applied in fields, such as medical implants [13], electronic devices, smart home devices, electric vehicles [14,15], and drones [16]. The wireless power transfer technology is also applied in wireless powered communication networks [17,18] and the wireless powered sensor networks [19], which are characterized by the low power rate but wide transfer range (compared with the coil size).…”

“…For electric vehicles, the energy is transferred wirelessly through the magnetic coupling between the transmitting coils in road and the receiving coil on a moving electric vehicle in the dynamic wireless charging system. According to the transmitting coil structure, the dynamic wireless charging systems can be divided into systems with long rail structure and systems with short-segmented coil structure [14]. When compared with the system with long rail structure, the transmitting coils are controlled and energized according to the position of receiving coil in the system with short segmented coil structure.…”