Inverter using PWM method

Details Inverter using PWM method Inverter using PWM method

2006-11-15

2010-12-28

Vo, Tuyet Thi (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S224000, C315S307000, C315S274000, C315S2090SC

Reexamination Certificate

active

07859197

ABSTRACT:
The switching timing is flexibly set in an inverter.An H-bridge circuit is controlled based on a triangular wave signal and an error voltage. To control the circuit, a first high-side transistor and a second low-side transistor are turned on in a first period until the triangular wave signal reaches the error voltage. The first high-side transistor is turned on in a second period until the triangular wave signal reaches a peak edge. A second high-side transistor is turned on in a third period until the triangular wave signal reaches a bottom edge. A first low-side transistor and the second high-side transistor are turned on in a fourth period until the triangular wave signal reaches again the error voltage. The second high-side transistor is turned on in a fifth period until the triangular wave signal reaches again a peak edge. The first high-side transistor is turned on in a sixth period until the triangular wave signal reaches again a bottom edge.

REFERENCES:
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International Preliminary Report on Patentability for International Application No. PCT/JP2006/322771 issued May 20, 2008 with English Translation.
International Search Report for International Application No. PCT/JP2006/322771 mailed Feb. 13, 2007 with English Translation.

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