Abstract
Aiming to maximize the transmission efficiency of inductively coupled power transmission (ICPT) system with the designed output power, a frequency locking method for an ICPT system based on LCC/S compensation topology is proposed in this paper. Firstly, the relationship between compensation component Lf1 and output power was deduced by the lossless model, and the initial value of Lf1 was obtained. Then, considering the system loss, the designed output power and frequency were input into the frequency locking program, and Lf1 and other compensation parameters were dynamically tracked. At the same time, the transmission efficiency of the system was calculated, and the frequency that achieved maximum efficiency was automatically locked when the system met the requirements of the designed output power. Finally, based on the method, the output characteristics of the system were verified by experiments.
Highlights
Coupled power transmission technology uses the alternating magnetic field generated by the transmitting coils to couple the energy to the receiving coils so as to realize the wireless power transmission
Compensation topology is an important aspect in inductively coupled power transmission (ICPT) systems because it can increase the power transfer ability, minimize the reactive power rating of the power source, and help achieve soft switching of the power in electronics devices [4]
When the transmission power of the ICPT system is fixed, the transmission efficiency of the system will depend on the power loss, which will be closely related to the equivalent series resistances (ESRs) of each component in the LCC/S compensation topology
Summary
Coupled power transmission technology uses the alternating magnetic field generated by the transmitting coils to couple the energy to the receiving coils so as to realize the wireless power transmission. Resonant frequency respectively and calculates the parameters of other compensation the model does not consider the loss, and the resonant frequency value that the literature components. The equivalent parameters establishing a loss model to adjust Lf1 until the output power reaches the design value. According to Equation (6), once the input voltage, the mutual inductance, the compensation inductance and the load are determined, the system power value is fixed. When the transmission power of the ICPT system is fixed, the transmission efficiency of the system will depend on the power loss, which will be closely related to the equivalent series resistances (ESRs) of each component in the LCC/S compensation topology. The expressions of η1, η2, η3, η4 are shown below respectively
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