Charging device for charging the energy store of a portable electric device
First Claim
1. A charging device for charging an energy storage device of a portable electrical device, the charging device comprising:
- at least one load cell having a controllable resonant circuit for inductively transferring energy;
said at least one load cell having a parallel resonant circuit with a first coil and a second coil and two controllable switching elements for self-oscillation of said parallel resonant circuit, wherein said parallel resonant circuit is supplied with a controllable supply voltage;
controllable switch-off elements for connecting control connections of said two controllable switching elements to each other, wherein the self-oscillation is interruptible in a targeted manner in order to modulate an amplitude of an electromagnetic field generated by said first coil and said second coil; and
a demodulator connected to an output of said parallel resonant circuit, said output being formed by a coil end of said first coil, wherein said coil end is not connected to a coil end of said second coil and wherein said output forms an output of said at least one load cell.
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Accused Products
Abstract
A charging device for charging an energy storage device of a portable electric device. The charging device has a load cell or load cells, each load cell is equipped with a controllable resonant circuit for inductively transmitting energy, a parallel resonant circuit with two coils and a controllable supply voltage, two controllable switching elements for a self-oscillation of the parallel resonant circuit, which have control connections that can be connected to each other via a respective controllable switch-off element, and a demodulator connected to an output of the load cell being formed by a coil end of one coil of said two coils, wherein said coil end is not connected to a coil end of another coil of said two coils. The self-oscillation can be interrupted in a controlled manner by switching the two controllable switching elements in order to modulate an amplitude of an electromagnetic field generated by the two coils.
7 Citations
14 Claims
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1. A charging device for charging an energy storage device of a portable electrical device, the charging device comprising:
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at least one load cell having a controllable resonant circuit for inductively transferring energy; said at least one load cell having a parallel resonant circuit with a first coil and a second coil and two controllable switching elements for self-oscillation of said parallel resonant circuit, wherein said parallel resonant circuit is supplied with a controllable supply voltage; controllable switch-off elements for connecting control connections of said two controllable switching elements to each other, wherein the self-oscillation is interruptible in a targeted manner in order to modulate an amplitude of an electromagnetic field generated by said first coil and said second coil; and a demodulator connected to an output of said parallel resonant circuit, said output being formed by a coil end of said first coil, wherein said coil end is not connected to a coil end of said second coil and wherein said output forms an output of said at least one load cell. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification