Abstract
In the induction electric energy transmission system applied to fix point charging of vehicles, the mutual inductance change caused by position deviation or air gap change, and the equivalent load change caused by power demand change will make the output power and efficiency fluctuate, thus affecting the output stability of the system. In order to ensure the reliability of the charging process of the system and at the same time have a strong power output capacity, this paper proposes a load segmental tracking control strategy based on the optimal power efficiency. This control strategy adjusts the equivalent load to track different power efficiency indicator curves according to different mutual inductance states of the system and power demand when the vehicle is static charging, so that it can always maintain the optimal power efficiency state according to different charging conditions and improve the system performance. Finally, simulation and experimental verification are carried out under different states of mutual inductance. The results show that this method can achieve the equivalent load segmental tracking under different mutual inductance states, and always maintain the optimal power efficiency output.
Highlights
Inductive power transmission (IPT) technology transfers the power from the power supply to the load side in a non-contact way through electromagnetic induction, which has the advantages of safety, reliability and flexible power supply
The structure of the paper is arranged as follows: the first chapter introduces the basic structure and related parameters of the induction power transmission system with DC–DC converter; Chapter 2 analyzes the output power, efficiency and power efficiency product parameters of the system within the allowable range of components in detail; According to the results of power efficiency analysis in chapter 2, the optimal power efficiency tracking control strategy of load segmentation is proposed in chapter 3; The fourth chapter carries on the simulation and the experiment, verifies the control strategy effectiveness; the conclusion is drawn
When IPT system is applied to the fixed point charging of vehicles, the system mutual inductance and load change caused by the inevitable external factors such as inaccurate positioning and different load will affect the output energy efficiency of the system and reduce the output stability
Summary
Inductive power transmission (IPT) technology transfers the power from the power supply to the load side in a non-contact way through electromagnetic induction, which has the advantages of safety, reliability and flexible power supply. Literature [19] achieves the load and the mutual inductance identification of the S/S-type IPT system based on an additional compensating capacitor in the primary side This method increases the complexity of the system and the control difficulty. The structure of the paper is arranged as follows: the first chapter introduces the basic structure and related parameters of the induction power transmission system with DC–DC converter; Chapter 2 analyzes the output power, efficiency and power efficiency product parameters of the system within the allowable range of components in detail; According to the results of power efficiency analysis, the optimal power efficiency tracking control strategy of load segmentation is proposed in chapter 3; The fourth chapter carries on the simulation and the experiment, verifies the control strategy effectiveness; the conclusion is drawn The structure of the paper is arranged as follows: the first chapter introduces the basic structure and related parameters of the induction power transmission system with DC–DC converter; Chapter 2 analyzes the output power, efficiency and power efficiency product parameters of the system within the allowable range of components in detail; According to the results of power efficiency analysis in chapter 2, the optimal power efficiency tracking control strategy of load segmentation is proposed in chapter 3; The fourth chapter carries on the simulation and the experiment, verifies the control strategy effectiveness; the conclusion is drawn
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