Power supply device of induction type power supply system and RF magnetic card identification method of the same
First Claim
1. A power supply device used in an induction type power supply system, wherein the power supply device comprises:
- a power supply coil;
an auxiliary coil;
a power supply driving module electrically coupled to the power supply coil and configured to drive the power supply coil;
an auxiliary driving module electrically coupled to the auxiliary coil and configured to drive the auxiliary coil when the power supply driving module is under a non-working status;
a resonant frequency measuring module electrically coupled to the power supply coil and configured to measure a resonant frequency of the power supply coil according to a capacitive and inductive parameter related to the power supply coil;
a voltage measuring module electrically coupled to the auxiliary coil and configured to track and lock a maximum of an oscillating voltage of the auxiliary coil; and
a processing module configured to keep the power supply driving module under the non-working status when the resonant frequency is determined to be stable and the oscillating voltage is determined to be decreased more than a predetermined ratio.
1 Assignment
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Accused Products
Abstract
A power supply device used in an induction type power supply system is provided that includes a power supply coil, an auxiliary coil, a power supply driving module, a auxiliary driving module, a harmonic frequency measuring module, a voltage measuring module and a processing module. The power supply driving module drives the power supply coil. The auxiliary driving module drives the auxiliary coil. The harmonic frequency measuring module measures a resonance frequency of the power-supply coil according to a capacitive and inductive parameter related to the power-supply coil. The voltage measuring module tracks and locks a maximum of an oscillation voltage of the auxiliary coil. When the processing module determines that the resonance frequency is stable and the oscillation voltage decreases more than a predetermined ratio of the oscillation voltage, the processing module keeps the power supply driving module under a non-working status.
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Citations
16 Claims
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1. A power supply device used in an induction type power supply system, wherein the power supply device comprises:
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a power supply coil; an auxiliary coil; a power supply driving module electrically coupled to the power supply coil and configured to drive the power supply coil; an auxiliary driving module electrically coupled to the auxiliary coil and configured to drive the auxiliary coil when the power supply driving module is under a non-working status; a resonant frequency measuring module electrically coupled to the power supply coil and configured to measure a resonant frequency of the power supply coil according to a capacitive and inductive parameter related to the power supply coil; a voltage measuring module electrically coupled to the auxiliary coil and configured to track and lock a maximum of an oscillating voltage of the auxiliary coil; and a processing module configured to keep the power supply driving module under the non-working status when the resonant frequency is determined to be stable and the oscillating voltage is determined to be decreased more than a predetermined ratio. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A RF magnetic card identifying method used in a power supply device in an induction type power supply system, wherein the RF magnetic card identifying method comprises:
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driving a power supply coil of the power supply device by a power supply driving module electrically coupled to the power supply coil; measuring a resonant frequency of the power supply coil according to a capacitive and inductive parameter related to the power supply coil by a resonant frequency measuring module electrically coupled to the power supply coil; driving an auxiliary coil of the power supply device by an auxiliary driving module electrically coupled to the auxiliary coil when the power supply driving module is under a non-working status; tracking and locking a maximum of an oscillating voltage of the auxiliary coil by a voltage measuring module electrically coupled to the auxiliary coil; and keeping the power supply driving module under a non-working status by a processing module when the resonant frequency is determined to be stable and the oscillating voltage is determined to be decreased more than a predetermined ratio. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification