| 摘要 |
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.
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