Method of designing an RPWM inverter with unwanted harmonic...

Details Method of designing an RPWM inverter with unwanted harmonic... Method of designing an RPWM inverter with unwanted harmonic...

2008-09-02

2008-09-02

Han, Jessica (Department: 2838)

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

C363S039000, C363S040000, C375S238000

Reexamination Certificate

active

11487375

ABSTRACT:
A method of designing a random pulse width modulation (RPWM) inverter with unwanted harmonic elimination, which first uses a Fourier analysis and a numerical analysis to eliminate the unwanted harmonic components, next uses the equal area approach to produce switching angles to be used as start values for solving non-linear equations, next selects low-order harmonics to be eliminated and randomly sampled harmonics to solve the equations and obtain pluralities of switching angles for eliminating different harmonics, next applies pluralities of harmonics to a random probability function to thereby obtain a harmonic distribution, and finally uses a random sampling to evenly disperse the higher side-band harmonic components and effectively suppress the low-order harmonic components.

REFERENCES:
patent: 6600669 (2003-07-01), Trzynadlowski et al.
patent: 2003/0117815 (2003-06-01), Saada
Jyh-Wei Chen; “Design of Random Pulse-Width Modulated Inverter with Lower-order Harmonic Elimination”; Nov. 6-10, 2005; Industrial Electronics Society, 2005. IECON 2005, 31st Annual Conference of IEEE; pp. 1088-1092.

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