Non-contacting power supplying system
First Claim
1. A non-contacting power supplying system comprising:
- a power supplying apparatus including a power supplying coil, signal supplying means for supplying a signal at a predetermined frequency, switch means responsive to an applied switching signal for interconnecting said signal supplying means with said power supplying coil to provide said signal at said predetermined frequency to said power supplying coil when said switching signal is supplied to said switch means, and a capacitor connected in parallel with said power supplying coil to establish resonance at a resonant frequency that is at least 1.5 times greater than said predetermined frequency, said power supplying apparatus further including switch control means responsive to a position detection signal for supplying said switching signal to said switch means;
a portable power receiving apparatus including a power receiving coil, said portable power receiving apparatus being positionable in a predetermined spatial relationship with said power supplying apparatus to electromagnetically couple said power receiving coil of said power receiving apparatus with power supplying coil of said power supplying apparatus; and
position detection means for supplying said position detection signal to said switch control means of said power supplying apparatus when said portable power receiving apparatus is in said predetermined spatial orientation with said power supplying apparatus.
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Accused Products
Abstract
Disclosed is a non-contacting power supplying apparatus (10), which couples electrical power to a portable power receiving apparatus (50) that is positionable on the top of the power supplying apparatus (10). In the disclosed embodiments, a power supplying coil (18) of the power supplying apparatus (10) is in spaced-apart juxtaposition with a power receiving coil (54) of the portable power receiving apparatus when the power receiving apparatus (50) is in a predetermined position relative to the power supplying apparatus (10). An electrical signal frequency is induced in the power supplying coil (18) by a frequency converter (16) and is coupled to the power receiving coil (54). A rectifier/filter circuit (56) connected to the power receiving coil (54) supplies a signal for charging a rechargeable battery (58). A control circuit (24), located in the power supplying apparatus (10) activates a switch (14) so that the rechargeable battery (58) can be charged only when the power receiving apparatus (50) is properly positioned on top of the power supplying apparatus (10). A capacitor (20) is connected in parallel with the power supplying coil (18) and resonates with the power supplying coil at a frequency greater than that of the frequency converter (16). In some embodiments, a monitoring circuit (64) is provided for supplying a signal representative of the charge status of the rechargeable battery (58). In these embodiments, the control circuit (28) of power supplying apparatus (10) activates the switch (14) only when the power receiving apparatus (50) is properly positioned relative to the power supplying apparatus (10) and charging of the rechargeable battery (58) is required.
135 Citations
13 Claims
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1. A non-contacting power supplying system comprising:
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a power supplying apparatus including a power supplying coil, signal supplying means for supplying a signal at a predetermined frequency, switch means responsive to an applied switching signal for interconnecting said signal supplying means with said power supplying coil to provide said signal at said predetermined frequency to said power supplying coil when said switching signal is supplied to said switch means, and a capacitor connected in parallel with said power supplying coil to establish resonance at a resonant frequency that is at least 1.5 times greater than said predetermined frequency, said power supplying apparatus further including switch control means responsive to a position detection signal for supplying said switching signal to said switch means; a portable power receiving apparatus including a power receiving coil, said portable power receiving apparatus being positionable in a predetermined spatial relationship with said power supplying apparatus to electromagnetically couple said power receiving coil of said power receiving apparatus with power supplying coil of said power supplying apparatus; and position detection means for supplying said position detection signal to said switch control means of said power supplying apparatus when said portable power receiving apparatus is in said predetermined spatial orientation with said power supplying apparatus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification