A New ICPT System with Harmonic of Inverse Injection for Achieving High-Quality Electric Power Transmission

Abstract

In order to reduce harmonic component of inductively coupled power transfer (ICPT) system, this work proposes a twochannel ICPT system based on the harmonic of inverse injection which detects the harmonic component of fundamental wave channel by controlling the harmonic of inverse injection from harmonic channel. First, based on the transfer admittance model, each harmonic component in the fundamental wave channel is analyzed to determine the size and ordinal number of harmonic which needs to be eliminated. Then, the principle block diagram of the system is given. Accordingly, the harmonic channel should possess good constant current and frequency-selecting property. The resonance compensation topology of the harmonic channel is determined by making the comparative analysis of frequency-selecting property of LCCL and LCL. Finally, conditions of the selected harmonic elimination can be derived by optimizing the whole system parameter. Experiment shows that when parameter optimization is achieved, the novel ICPT system can offset the selected harmonic of output current of high-frequency inverter in the fundamental wave channel, achieving high-quality electric power transmission.

A Calculation Method for the Maximum Transmission Power in ICPT Systems Under Non-Sinusoidal Excitation

“…Eq. (11) indicates that the MPTP is dependent on the harmonic components. By employing the steepest gradient descent method to conduct a one-dimensional search on the total power PL in the equation, we can determine the maximum power value and the load impedance value at the MPTP.…”

“…The maximum transmission power serves as a defining attribute for the power transmission capability of ICPT systems and constitutes a pivotal performance indicator for the overall system. Its significance is heightened when estimating both the power transmission capacity of ICPT systems [11] and the switching threshold for multimode coupled power transmission [12]. Resolving these issues and optimizing subsequent power transmissions necessitates the determination of a physical interpretation of the maximum transmitted power and the prediction of the maximum power transfer point (MPTP).…”