Extremum seekingbased optimization of high voltage converter modulator risetime
Abstract
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.
 Authors:

 Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
 Publication Date:
 Research Org.:
 Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
 Sponsoring Org.:
 USDOE
 OSTI Identifier:
 1200618
 Report Number(s):
 LAUR1222018
Journal ID: ISSN 10636536
 Grant/Contract Number:
 AC5206NA25396
 Resource Type:
 Accepted Manuscript
 Journal Name:
 IEEE Transactions on Control Systems Technology
 Additional Journal Information:
 Journal Volume: 22; Journal Issue: 1; Journal ID: ISSN 10636536
 Publisher:
 IEEE
 Country of Publication:
 United States
 Language:
 English
 Subject:
 97 MATHEMATICS AND COMPUTING; 43 PARTICLE ACCELERATORS; Accelerator Design, Technology, and Operations
Citation Formats
Scheinker, Alexander, Bland, Michael, Krstic, Miroslav, and Audia, Jeff. Extremum seekingbased optimization of high voltage converter modulator risetime. United States: N. p., 2013.
Web. doi:10.1109/TCST.2013.2240387.
Scheinker, Alexander, Bland, Michael, Krstic, Miroslav, & Audia, Jeff. Extremum seekingbased optimization of high voltage converter modulator risetime. United States. doi:10.1109/TCST.2013.2240387.
Scheinker, Alexander, Bland, Michael, Krstic, Miroslav, and Audia, Jeff. Fri .
"Extremum seekingbased optimization of high voltage converter modulator risetime". United States. doi:10.1109/TCST.2013.2240387. https://www.osti.gov/servlets/purl/1200618.
@article{osti_1200618,
title = {Extremum seekingbased optimization of high voltage converter modulator risetime},
author = {Scheinker, Alexander and Bland, Michael and Krstic, Miroslav and Audia, Jeff},
abstractNote = {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.},
doi = {10.1109/TCST.2013.2240387},
journal = {IEEE Transactions on Control Systems Technology},
number = 1,
volume = 22,
place = {United States},
year = {2013},
month = {2}
}
Web of Science