System and method for triggering power transfer across an inductive power coupling and non resonant transmission
First Claim
1. A triggerable power transmitter for power transmission comprising:
- a primary coil in the power transmitter configured to be inductively coupled to a secondary coil in a power receiver;
a driver used to electrically drive the primary coil;
a resistor connected in series with the primary coil, wherein said resistor is used to produce a signal that corresponds to current flowing through the primary coil, reflecting resonance properties of the primary coil;
a bypass switch having a closed position and an open position, connected in parallel to the resistor; and
a processor configured to set the switch to the open position in order to determine that coupling exists between the primary coil and the secondary coil based on the signal, and set the switch to the closed position for power transmission, wherein the processor controls the power transmission with the driver while coupling exists.
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0 Petitions
Accused Products
Abstract
A triggerable power transmitter for power transmission from a primary coil to an inductively coupled secondary coil in a power receiver has a primary coil; a driver for electrically driving the primary coil; a probing coil receives analog signals indicative of resonance properties of the primary coil; analog filters may be used to filter frequencies, and a processor capable of generating digital information in response to the analog signal and determining if said primary coil is coupled to a secondary coil based on the digital information, and triggering power from the primary coil to said secondary coil when said primary coil is inductively coupled to said secondary coil. A resistor may be selectably connected in series with the primary coil and shorted out when power is transmitted.
12 Citations
8 Claims
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1. A triggerable power transmitter for power transmission comprising:
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a primary coil in the power transmitter configured to be inductively coupled to a secondary coil in a power receiver; a driver used to electrically drive the primary coil; a resistor connected in series with the primary coil, wherein said resistor is used to produce a signal that corresponds to current flowing through the primary coil, reflecting resonance properties of the primary coil; a bypass switch having a closed position and an open position, connected in parallel to the resistor; and a processor configured to set the switch to the open position in order to determine that coupling exists between the primary coil and the secondary coil based on the signal, and set the switch to the closed position for power transmission, wherein the processor controls the power transmission with the driver while coupling exists. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification