SYSTEMS AND METHODS OF WIRELESS POWER TRANSFER WITH INTERFERENCE DETECTION
First Claim
1. A system comprising:
- a secondary side controller configured to monitor a sensed power and to produce a feedback signal comprising parameters relative to the sensed power; and
a modulation module configured to modulate a representation of the feedback signal, the modulation transmitted to a primary side controller, the primary side controller configured to inhibit charging based on the parameters as applied to a power loss equation.
1 Assignment
0 Petitions
Accused Products
Abstract
Performance of wireless charging systems may be significantly degraded when parasitic metal objects come in close proximity to the transmitting coil. Some of the transmitted energy may be coupled by these metal objects and wasted as heat. This may create a danger as the metal objects may get hot enough to create a fire hazard, to cause plastic parts deformation, or operator skin burns when touched.
Systems and methods of wireless power transfer system with interference detection disclosed herein detects possible excessive energy transfer associated with parasitic metal objects placed in close proximity with system coils by comparing power received on the receiving side of the system with the power consumed on the primary side considering known losses in the system. If the result of such comparison shows that power consumed on the primary side substantially exceeds power received on the secondary side, the system may terminate operation.
-
Citations
26 Claims
-
1. A system comprising:
-
a secondary side controller configured to monitor a sensed power and to produce a feedback signal comprising parameters relative to the sensed power; and a modulation module configured to modulate a representation of the feedback signal, the modulation transmitted to a primary side controller, the primary side controller configured to inhibit charging based on the parameters as applied to a power loss equation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method, comprising:
-
sensing a power on a secondary side of an inductive coupling; generating a representation comprising parameters relative to the sensed power; modulating the representation of the sensed power; and
transmitting the modulated representation of the sensed power to a primary side of the inductive coupling, the primary side configured to inhibit power transfer based on the parameters as applied to a power loss equation. - View Dependent Claims (10, 11, 12, 13, 14, 15)
-
-
16. A method, comprising:
-
receiving a representation comprising parameters relative to sensed power from a secondary side of an inductive coupling; applying the parameters to a power loss equation to determine efficiency of power transfer from primary to secondary; and determining the presence of a parasitic metallic element based on the efficiency. - View Dependent Claims (17, 18, 19, 20)
-
-
21. A system comprising:
a primary side controller configured to; control power transmitted across an inductive coupling; receive a representation comprising parameters relative to secondary sensed power; and determine if a parasitic metallic element is present by applying the parameters to a power loss equation to determine an efficiency of secondary sensed power versus primary power. - View Dependent Claims (22, 23, 24, 25, 26)
Specification