Abstract
Inductive Power Transfer (IPT) technology can realize energy transfer across relatively large air gap with the aid of high frequency magnetic coupling. To obtain a large power output, multiple pickups are usually utilized to satisfy power requirement. However, due to the influence of reflecting impedance, it is not easy to control the output power of each pickup to reach desired the power requirement. This paper proposes a cooperative control method. It's realized by adding a Buck converter at the secondary side to regulate output power of each pickup. A cooperative control algorithm is proposed based on prior estimation of the power transfer capability of each pickup. A weight factor is developed to allocate required power for each pickup. The cooperative control method is simple and easy for implementation. Finally, experimental results verify this cooperative control method.
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