Circuit and method for generating an AC voltage from a plurality of voltage sources having a temporally variable DC output voltage
AssigneeSemikron Elektronik GmbH & Co. KG
InventorDejan Schreiber
Life of this patent
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Abstract
A circuit comprising at least one parallel-connected partial circuit for feeding at least one inverter circuit. A partial circuit consists of an unregulated voltage source having a temporally varying DC output voltage, a voltage doubling circuit and a voltage regulating circuit with an associated regulating device. In the inventive method, the voltage doubling circuit doubles the voltage of the unregulated voltage source. The regulation of the current/voltage characteristic curve, the MPP tracking, of the unregulated voltage source is effected by the regulating device of the voltage regulating circuit.
Claims14
A circuit comprising at least one partial circuit for receiving power from an unregulated voltage source having a temporally varying DC output voltage, and for feeding at least one inverter circuit which is adapted to be connected to a transformer, wherein the partial circuit comprises:
- a voltage doubling circuit;
- and
- a voltage regulating circuit with a regulating device, said voltage regulating circuit including:
- a step-down converter having a first power transistor in a positive branch, a first diode connecting said positive branch and a negative branch, and a first inductance;
- and
- a step-up converter, in parallel with said step-down converter, and having a second inductance, a second power transistor connecting a positive branch of said step-up converter and a negative branch thereof, and a second diode in said positive branch of said step-up converter;
- wherein
- said step-down converter is arranged directly adjacent to said voltage doubling circuit and said voltage doubling circuit is arranged directly adjacent to said voltage source, and
- wherein said step-up converter is arranged directly adjacent to said inverter circuit.
Dependencies are inferred from the claim text.