Multiple Resonant Cells for Wireless Power Mats

• US 20130307347A1
• Filed: 05/06/2013
• Published: 11/21/2013
• Est. Priority Date: 05/04/2012
• Status: Active Grant

• Current Assignee: Delta Electronics Thailand Public Company Limited (Delta Electronics Incorporated)
• Original Assignee: DET International Holding Limited (Delta Electronics Incorporated)
• Inventors: Davila, Marco Antonio, Jitaru, Ional
• Granted Patent: US 9,530,556 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment

Abstract

A method of configuring windings in an inductive charging pad array by using capacitors for impedance control and configuring windings to reduce the stray magnetic fields produced.

Claims

1. The method of adding capacitors in a winding array for the purpose of controlling the power applied to each cell.

2. The method of configuring multiple cells in series such that each cell has a series resonance capacitor and winding that resonate when no secondary winding is nearby and that a secondary winding is in close proximity to one of the cells will move it from this resonance.

3. The method of configuring multiple cells in parallel such that each cell has a parallel resonant capacitor and winding that resonate when no secondary winding is nearby and if a secondary winding is in close proximity to one of the cell will move it from resonance.

4. The method of putting in series multiple cells of consisting of parallel resonant capacitor and winding such that the frequency of operation is not at resonance until one of the windings is brought in close proximity to the secondary.

5. The method of putting in parallel multiple cells consisting each of a series resonant capacitor and winding such that the frequency of operation is not at resonance until one of the winding is brought in close proximity to the secondary winding coil.

6. The method in which multiple windings are placed in opposite polarity to one another for the purpose of canceling the magnetic field far away from the inductive charging pad.