Matching networks for wireless power transfer and related techniques
AssigneeThe Regents of the University of Colorado, a body corporate
InventorsSreyam Sinha, Ashish Kumar, Khurram K. Afridi
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Abstract
In one implementation, an analytical approach to determining an improved and/or optimal design of a matching network in a capacitive or inductive WPT system is provided. In one implementation, for example, a framework is provided to enable stage(s) of the network to simultaneously provide gain and compensation. The multistage matching network efficiency can be improved and/or optimized, such as by using the method of Lagrange multipliers, resulting in the optimum distribution of gain and compensation among the L-section stages.
Claims24
A matching network comprising at least one of:
- a first stage providing an input stage of the matching network, the first stage comprising a pair of matching network input terminals, a pair of first stage output terminals, and at least two first stage reactive components disposed between the pair of matching network input terminals and the pair of first stage output terminals, the first stage comprising a near-resistive input impedance and a complex load impedance;
- and
- a second stage providing an output stage of the matching network, the second stage comprising a pair of second stage input terminals coupled to the pair of first stage output terminals, a pair of matching network output terminals, and at least two second stage reactive components disposed between the pair of second stage input terminals and the pair of matching network output terminals, the second stage comprising a complex input impedance and a complex load impedance.
A matching network comprising at least one of:
- a first stage providing an input stage of the matching network, the first stage comprising a pair of matching network input terminals, a pair of first stage output terminals, and at least two first stage reactive components disposed between the pair of matching network input terminals and the pair of first stage output terminals, the first stage comprising a complex input impedance and a complex load impedance;
- and
- a second stage providing an output stage of the matching network, the second stage comprising a pair of second stage input terminals coupled to the pair of first stage output terminals, a pair of matching network output terminals, and at least two second stage reactive components disposed between the pair of second stage input terminals and the pair of matching network output terminals, the second stage comprising a complex input impedance and a near-resistive load impedance.
A wireless power transfer system comprising:
- a wireless power transfer (WPT) circuit comprising a WPT primary side and a WPT secondary side;
- a first matching network comprising a first matching network input port and a first matching network output port, the first matching network output port coupled to the WPT primary side, wherein the first matching network comprises at least one of:
- a first stage comprising a near-resistive input impedance and a complex load impedance, and
- a second stage comprising a complex input impedance and a complex load impedance at the first matching output port;
- and
- a second matching network comprising a second matching network input port and a second matching network output port, the second matching network input port coupled to the WPT secondary side, wherein the second matching network comprises at least one of:
- a first stage comprising a complex input impedance, and
- a second stage comprising a complex input impedance and a near-resistive load impedance at the second matching output port.
Dependencies are inferred from the claim text.