Reduction of subharmonic oscillation at high frequency...

Details Reduction of subharmonic oscillation at high frequency... Reduction of subharmonic oscillation at high frequency...

2007-02-20

2008-11-11

Masih, Karen (Department: 2837)

Electricity: motive power systems

Induction motor systems

Primary circuit control

C318S400020, C318S700000, C318S801000

Reexamination Certificate

active

07449859

ABSTRACT:
A control architecture for an electrical inverter includes a synchronous frame current regulator and a stationary frame current regulator. The stationary frame current regulator receives input currents that represent filtered versions of stationary frame currents that correspond to the inverter output currents. The control architecture employs an adaptive filter module that filters the stationary frame currents to remove the fundamental motor frequency component (and its related harmonics), thus extracting any low frequency harmonic components. The stationary frame current regulator processes the low frequency components, while the synchronous frame current regulator processes the fundamental frequency component, resulting in suppression of low frequency oscillations in the inverter output.

REFERENCES:
patent: 2004/0225468 (2004-11-01), McGaughey et al.

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