Inductive transmission of electric energy
AssigneeBraun GmbH
InventorGünther Bergk
Life of this patent
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Abstract
An inductive electric energy transmission circuit includes: an oscillating circuit; a push-pull circuit including a first switching transistor and a second switching transistor that are configured to alternate a current flow through the oscillating circuit. The circuit arrangement also includes, a control circuit including first and second control transistors configured to control the first and second switching transistors; and a frequency generator configured to generate an output signal, wherein the output signal is adapted to drive the control transistors.
Claims21
An inductive electric energy transmission circuit comprising:
- an oscillating circuit;
- a push-pull circuit comprising first and second switching transistors configured to alternate a flow of current through the oscillating circuit;
- a control circuit comprising first and second control transistors configured to control the first and second switching transistors;
- a frequency generator configured to generate an output signal adapted to drive the control transistors;
- a first capacitor arranged electrically parallel to a main current path of the first control transistor, wherein a first end of the first capacitor is electrically connected to a first end of a resistor;
- and
- a second capacitor arranged electrically parallel to a main current path of the second control transistor, wherein a first end of the second capacitor is electrically connected to the second end of the resistor.
A method of inductively transmitting electric energy, the method comprising:
- providing a circuit arrangement including:
- an oscillating circuit;
- a push-pull circuit comprising first and second switching transistors configured to alternate a first current flow through the oscillating circuit;
- a control circuit comprising first and second control transistors configured to control an antiphase switching of the first and second switching transistors;
- a frequency generator;
- a first capacitor arranged electrically parallel to a main current path of the first control transistor, wherein a first end of the first capacitor is electrically connected to a first end of a resistor;
- and
- a second capacitor arranged electrically parallel to a main current path of the second control transistor, wherein a first end of the second capacitor is electrically connected to the second end of the resistor;
- generating an output signal with the frequency generator;
- and
- delivering the output signal to a control terminal of the first control transistor and a control terminal of the second control transistor, thereby driving the control circuit and controlling the direction of the first current flow through the oscillating circuit.
In combination, an electrical appliance and an associated charging station;
- wherein
- the charging station comprises:
- a circuit arrangement configured to inductively transmit electric energy, including:
- an oscillating circuit comprising:
- a primary coil of a two-part transformer;
- a push-pull circuit comprising first and second switching transistors configured to alternate a flow of current through the oscillating circuit;
- a control circuit comprising first and second control transistors configured to control the first and second switching transistors;
- a frequency generator configured to generate an output signal adapted to drive the control transistors;
- a first capacitor arranged electrically parallel to a main current path of the first control transistor, wherein a first end of the first capacitor is electrically connected to a first end of a resistor;
- and
- a second capacitor arranged electrically parallel to a main current path of the second control transistor, wherein a first end of the second capacitor is electrically connected to the second end of the resistor;
- and
- wherein the electric appliance comprises:
- a secondary coil of the two-part transformer configured to magnetically couple to the primary coil for transmitting electric energy from the primary coil to the secondary coil.
Dependencies are inferred from the claim text.