Circuit and method for ac-to-ac voltage conversion
OwnerMohammadReza Haji Moradi Javarsiani, Hossein Mokhtariinventors
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Abstract
A circuit and method for converting an input AC voltage of a source to an output AC voltage of a destination is disclosed. The circuit may include a main switch cell coupled to the source, a freewheeling switch cell coupled to the main switch cell, a first inductor coupled to the main switch cell, the freewheeling switch and the destination, and a second inductor coupled to the first inductor, the main switch cell, the freewheeling switch and the destination. The circuit may also include a plurality of current paths when at least one of the main switch cell and/or the freewheeling switch cell is on. In some implementations, the main switch cell and the freewheeling switch cell are controlled using a switching method.
Claims20
A circuit for converting an input AC voltage of a source to an output AC voltage of a destination, comprising:
- a main switch cell coupled to the source;
- a freewheeling switch cell coupled to the main switch cell;
- a first inductor coupled to the main switch cell, the freewheeling switch cell and the destination;
- and
- a second inductor coupled to the first inductor, the main switch cell, the freewheeling switch cell and the destination;
- wherein the circuit is configured to provide a plurality of current paths when at least one of the main switch cell or the freewheeling switch cell is on.
A method for converting an input AC voltage to an output AC voltage in an AC converter circuit including a main switch and a freewheeling switch, comprising:
- turning on the main switch and keeping the main switch on during a duty cycle while the freewheeling switch is off;
- turning on the freewheeling switch and keeping the freewheeling switch on during a first overlap interval while the main switch is on;
- turning off the main switch and keeping the main switch off during a freewheeling interval while the freewheeling switch is on;
- turning on the main switch and keeping the main switch on during a second overlap interval while the freewheeling switch is on;
- and
- turning off the freewheeling switch after the second overlap interval while the main switch is on;
- wherein the sum of the duty cycle, the first overlap interval, the freewheeling interval, and the second overlap interval is kept equal to a stability threshold, or larger than the stability threshold.
Dependencies are inferred from the claim text.