Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Maximum efficiency tracking method based on parameter detection for ICPT systems

  • Sheng, Xuerui (Key Laboratory of Power Electronics and Electric Drive, Chinese Academy of Sciences) ;
  • Shi, Liming (Key Laboratory of Power Electronics and Electric Drive, Chinese Academy of Sciences)
  • Received : 2020.12.30
  • Accepted : 2021.05.21
  • Published : 2021.09.20
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Abstract

Efficiency is very important in inductively coupled power transfer (ICPT) systems. To maintain a high efficiency, a maximum efficiency tracking (MET) method based on parameter detection is proposed in the paper. The basic idea is to convert the load value to the active short-circuit (ASC) time interval for the semi-controlled rectifier on the pick-up side. The ASC time interval and the transmitting coil current are detected to calculate the load and mutual inductance values on the transmitting side. According to the detected parameters, the output voltage of the high-frequency inverter that makes the system run at its maximum efficiency can be calculated and controlled. In addition, the load voltage is controlled by the high-frequency rectifier on the pick-up side. Simulation and experimental results show that this method can quickly achieve MET without wireless communication. Furthermore, the difference between the experimental maximum efficiency and the theoretical maximum efficiency is no more than 2%.

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References

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