Method of determining a required inductance-current...

Details Method of determining a required inductance-current... Method of determining a required inductance-current...

2006-01-24

2006-01-24

Riley, Shawn (Department: 2838)

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

Reexamination Certificate

active

06989998

ABSTRACT:
A method of determining the inductance required to maintain the amplitudes of harmonic current waveforms in a rectifier circuit below a predetermined level includes a rectifier circuit that has an inductor and a capacitor. The circuit draws power from a varying power source and supplies power to a load. The method includes the steps of calculating, using a resonant analysis method, an expression for the input current waveform in the rectifier circuit in terms of the inductance of the inductor when a predetermined input voltage waveform is applied to the rectifier circuit. The capacitor has a predetermined capacitance and the load drawing has a predetermined current from the rectifier circuit. The method also includes the step of determining the amplitudes of harmonic current waveforms constituting the calculated input current waveform in the rectifier circuit, and providing a value for the inductor in the rectifier circuit at which none of the amplitudes of the harmonic current waveforms constituting the calculated input current waveform in the rectifier circuit exceed the predetermined level.

REFERENCES:
patent: 5661348 (1997-08-01), Brown
patent: 6608770 (2003-08-01), Vinciarelli et al.
Jovanovic et al., Merits and limitations of full-bridge rectifier with Ic filter in meeting iec 1000-3-2 harmonic limit specifications, 1996, IEEE, pp. 354-360.

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