A Dual Triangle Timing Circuit for Improved Performance of 4-Quadrant H-Bridge Switches

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Description

Fermilab is in the process of upgrading its Booster Correction Element System to include full field correction element magnets to correct position and chromaticity throughout the booster cycle. This upgrade requires power supplies with maximum outputs of {+-}180V/{+-}65A, with current bandwidths of 5k Hz and with slew rates of min to max current in 1ms. For seamless operation around zero current and voltage, we use continuous switching on both sides of the bridge. Although the straightforward way of coordinating the switching on both sides of the bridge can be accomplished with one triangle timing wave and one voltage reference, we ... continued below

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3 pages

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Krafczyk, G.; Jensen, C.; Pfeffer, H.; Warchol, G. & /Fermilab May 1, 2009.

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Fermilab is in the process of upgrading its Booster Correction Element System to include full field correction element magnets to correct position and chromaticity throughout the booster cycle. This upgrade requires power supplies with maximum outputs of {+-}180V/{+-}65A, with current bandwidths of 5k Hz and with slew rates of min to max current in 1ms. For seamless operation around zero current and voltage, we use continuous switching on both sides of the bridge. Although the straightforward way of coordinating the switching on both sides of the bridge can be accomplished with one triangle timing wave and one voltage reference, we have found that using two triangle waves yields a switching coordination that effectively doubles the frequency of the differential ripple on the load and allows for better filtering of the output ripple.

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3 pages

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  • Presented at Particle Accelerator Conference (PAC 09), Vancouver, BC, Canada, 4-8 May 2009

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  • Report No.: FERMILAB-CONF-09-148-AD
  • Grant Number: AC02-07CH11359
  • Office of Scientific & Technical Information Report Number: 952647
  • Archival Resource Key: ark:/67531/metadc926148

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Office of Scientific & Technical Information Technical Reports

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  • May 1, 2009

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

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  • Nov. 23, 2016, 4:54 p.m.

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Krafczyk, G.; Jensen, C.; Pfeffer, H.; Warchol, G. & /Fermilab. A Dual Triangle Timing Circuit for Improved Performance of 4-Quadrant H-Bridge Switches, article, May 1, 2009; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc926148/: accessed June 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.