Efficiency monitor for inductive power transmission
First Claim
1. A wireless power transmitter for wireless power transmission to a wireless power receiver, the wireless power transmitter comprising:
- a primary coil, capable of being inductively coupled to a secondary coil in said wireless power receiver;
a power supply and an associate driver configured to provide a varying electrical potential from said power supply to said primary coil;
a monitoring system configured to measure electrical flow parameters of the primary coil;
a controller configured to detect, based on said electrical flow parameters measured by said monitoring system, an error condition indicative of a foreign object introduced between said primary coil and said secondary coil by calculating one or more reference parameters and comparing said electrical flow parameters to said reference parameters, and to facilitate, when said error condition is detected, interrupting said electrical potential to said primary coil; and
a signal conditioner comprising a frequency changer configured to increase the frequency of an output signal of the monitoring system.
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Accused Products
Abstract
An inductive power transmitter for inductive power transmission to an inductive power receiver is provided, comprising a primary coil, capable of being inductively coupled to a secondary coil in the inductive power receiver, a power supply and an associate driver configured to provide a varying electrical potential from the power supply to the primary coil, a monitoring system configured to measure electrical flow parameters of the primary coil, and a controller configured to detect, based on the electrical flow parameters measured by the monitoring system, an error condition indicative of a foreign object introduced between the primary coil and the secondary coil, and to facilitate, when the error condition is detected, interrupting the electrical potential to the primary coil.
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Citations
19 Claims
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1. A wireless power transmitter for wireless power transmission to a wireless power receiver, the wireless power transmitter comprising:
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a primary coil, capable of being inductively coupled to a secondary coil in said wireless power receiver; a power supply and an associate driver configured to provide a varying electrical potential from said power supply to said primary coil; a monitoring system configured to measure electrical flow parameters of the primary coil; a controller configured to detect, based on said electrical flow parameters measured by said monitoring system, an error condition indicative of a foreign object introduced between said primary coil and said secondary coil by calculating one or more reference parameters and comparing said electrical flow parameters to said reference parameters, and to facilitate, when said error condition is detected, interrupting said electrical potential to said primary coil; and a signal conditioner comprising a frequency changer configured to increase the frequency of an output signal of the monitoring system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for detecting a foreign object between a wireless power transmitter and a wireless power receiver, the method comprising:
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providing said wireless power transmitter, said wireless power transmitter being configured for wireless power transmission to a wireless power receiver and comprising a primary coil capable of being inductively coupled to a secondary coil in said wireless power receiver; measuring electrical flow parameters of the primary coil; detecting, based on the measured electrical flow parameters, an error condition indicative of a foreign object introduced between said primary coil and said secondary coil by calculating one or more reference parameters and comparing said electrical flow parameters to said reference parameters; and calculating said reference parameters based on the frequency of the varying electrical and at least one measured electrical flow parameter. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification