Extremum seeking-based optimization of high voltage converter modulator rise-time

Journal Article · Fri Feb 01 00:00:00 EST 2013 · IEEE Transactions on Control Systems Technology

DOI:https://doi.org/10.1109/TCST.2013.2240387· OSTI ID:1200618

Scheinker, Alexander ^[1]; Bland, Michael ^[1]; Krstic, Miroslav ^[1]; Audia, Jeff ^[1]

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1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

We digitally implement an extremum seeking (ES) algorithm, which optimizes the rise time of the output voltage of a high voltage converter modulator (HVCM) at the Los Alamos Neutron Science Center (LANSCE) HVCM test stand by iteratively, simultaneously tuning the first 8 switching edges of each of the three phase drive waveforms (24 variables total). We achieve a 50 μs rise time, which is reduction in half compared to the 100 μs achieved at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory. Considering that HVCMs typically operate with an output voltage of 100 kV, with a 60Hz repetition rate, the 50 μs rise time reduction will result in very significant energy savings. The ES algorithm will prove successful, despite the noisy measurements and cost calculations, confirming the theoretical results that the algorithm is not affected by noise whose frequency components are independent of the perturbing frequencies.

• Research Organization: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC52-06NA25396
• OSTI ID: 1200618
• Report Number(s): LA-UR-12-22018
• Journal Information: IEEE Transactions on Control Systems Technology, Vol. 22, Issue 1; ISSN 1063-6536
• Publisher: IEEE
• Country of Publication: United States
• Language: English

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