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This paper presents a Contactless Slipring System (CSS) based on rotating magnetic field theory for transferring electrical power to a rotatable shaft. Besides the analytical expressions, a 3-D FEM (Finite Element Model) is developed for simulation study, and a practical circuit is built for system verification and performance evaluation. A method of canceling the rotational torque associated with...
The paper presents a hands free Inductive Power Transfer (IPT) system for charging Electric Vehicle (EV) batteries using a technique called dynamic demand control (DDC). A typical IPT system comprises a power supply, a pair of magnetic pads for wireless power coupling and a power regulator to drive the load as required. DDC enables suitable domestic appliances to assist grid stabilisation by adjusting...
Capacitive Power Transfer (CPT) technology has been proposed and investigated recently as an alternative contactless power transfer solution which has the advantages of being able to transfer power across metal barriers and having low standing power losses. Alignment between the primary and secondary plates is one of the most important factors affecting the performance of a CPT system because any...
This paper presents a power flow control method for contactless power transfer systems. The proposed method is to control the magnitude of the primary track current based on the concept of energy injection and regeneration. The stored energy and resonant current is controlled to vary on the primary side. As a result, the induced current on the secondary side varies. For such a reason, the power flow...
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