Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components
Reexamination Certificate
2008-04-08
2008-04-08
Han, Jessica (Department: 2838)
Electric power conversion systems
Current conversion
With means to introduce or eliminate frequency components
C363S046000, C363S052000, C363S087000
Reexamination Certificate
active
10918629
ABSTRACT:
A method and apparatus for altering converter control as a function of the degree of unbalance in supply line voltages to substantially eliminate second harmonics on the supply lines caused by active control of the converter including identifying supply line peak amplitude values and using the peak values to identify potential second harmonics and then altering command values as a function of the potential second harmonic components.
REFERENCES:
patent: 4346307 (1982-08-01), Zulaski
patent: 6535404 (2003-03-01), Ainsworth et al.
Kim, H.S. et al., Design of Current Controller for 3-Phase PWM Converter with Unbalanced Input Voltage, IEEE Aug. 1998, pp. 503-509.
Sakui, M. et al., Calculation of harmonic currents in a three-phase convertor with unbalanced power supply conditions, IEEE Proceedings-B, vol. 139, No. 5, Sep. 1992, pp. 478-484.
Stankovic, A.V. et al., A Generalized Control Method for Input-Output Harmonic Elimination for the PWM Boost Rectifier Under Simultaneous Unbalanced Input Voltages and Input Impendances, IEEE Aug. 2001, pp. 1309-1314.
Suh, Y. et al., A Nonlinear Control of the Instantaneous Power in dq Sunchronous Frame for PWM AC/DC Converter under Generalized Unbalanced Operating Conditions, IEEE Jul. 2002, pp. 1189-1196.
Tsai, W. et al., Effects of Voltage Unbalance and Harmonics on Three-Phase SPWM AC-to-DC Converters with Instantaneous Power Feedback, IEEE, Sep. 1993, pp. 61-66.
Breitzmann Robert John
Royak Semyon
Han Jessica
Quarles & Brady LLP
Rockwell Automation Technologies Inc.
Walbrun William R.
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