IPAC2015 - List of Authors (Song, B.)

Paper	Title	Page
WEPTY004	Mathematical Modeling and Analysis of a Wide Bandwidth Bipolar Power Supply for the Fast Correctors in the APS Upgrade Controller	3264
	B. Song, J. Wang ANL, Argonne, Illinois, USA
	Funding: Work supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. The APS Upgrade requires a fast bipolar power supply for the fast correction magnets. The performance requirement of the power supply includes a -3dB at 10 kHz small-signal bandwidth for the output current. This requirement presents a technical challenge to the design of the power circuit and the power supply regulator because the magnet load may have a significant inductance and make it difficult to achieve a high bandwidth for the current. In order to meet the requirement, different circuit topologies and regulators are being investigated. One of the candidate designs combines a standard H-bridge pulse-width modulation (PWM) circuit and a linear power amplifier to provide a ±15A DC current and an AC component up to 1% of the full scale with the required bandwidth. An appropriate feedback control loop and a current regulator are being designed. The mathematical modeling and simulation of the power circuit and the control loop are being conducted to prove the concept of the design. This paper presents the design of the circuit, mathematical modeling, and the simulation results.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPTY004
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WEPTY011	Power Supply Conceptual Design and R&D for the APS Upgrade	3276
	J. Wang, B. Deriy, T. Fors, R.T. Keane, B. Song ANL, Argonne, Ilinois, USA
	Funding: Work supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. The MBA upgrade for the APS requires a large number of power supplies with either unipolar or bipolar DC output currents. The unipolar power supplies will be used to power the main coils in the dipole, quadrupole, and sextupole magnets and the bipolar power supplies will be used for the trim or correction coils. There are several demanding requirements of the power supplies. The unipolar power supplies are expected to have a current stability within 10 parts per million (ppm) of the full scale. The currents must be calibrated to the specification and confirmed with independent and accurate measurement. The bipolar power supplies for the fast correction magnets are required to have a wide output current bandwidth in order to minimize the impact on the real-time feedback system for the beam position correction. There are also new requirements for the power supply controls and communications that are much more demanding than that in the existing APS accelerators. This paper will report the conceptual designs of the power supply systems and the R&D program that is developed to find solutions to the technical challenges.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPTY011
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Mathematical Modeling and Analysis of a Wide Bandwidth Bipolar Power Supply for the Fast Correctors in the APS Upgrade Controller

3264

B. Song, J. Wang
ANL, Argonne, Illinois, USA

Funding: Work supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.
The APS Upgrade requires a fast bipolar power supply for the fast correction magnets. The performance requirement of the power supply includes a -3dB at 10 kHz small-signal bandwidth for the output current. This requirement presents a technical challenge to the design of the power circuit and the power supply regulator because the magnet load may have a significant inductance and make it difficult to achieve a high bandwidth for the current. In order to meet the requirement, different circuit topologies and regulators are being investigated. One of the candidate designs combines a standard H-bridge pulse-width modulation (PWM) circuit and a linear power amplifier to provide a ±15A DC current and an AC component up to 1% of the full scale with the required bandwidth. An appropriate feedback control loop and a current regulator are being designed. The mathematical modeling and simulation of the power circuit and the control loop are being conducted to prove the concept of the design. This paper presents the design of the circuit, mathematical modeling, and the simulation results.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPTY004

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPTY011

Power Supply Conceptual Design and R&D for the APS Upgrade

3276

J. Wang, B. Deriy, T. Fors, R.T. Keane, B. Song
ANL, Argonne, Ilinois, USA

Funding: Work supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.
The MBA upgrade for the APS requires a large number of power supplies with either unipolar or bipolar DC output currents. The unipolar power supplies will be used to power the main coils in the dipole, quadrupole, and sextupole magnets and the bipolar power supplies will be used for the trim or correction coils. There are several demanding requirements of the power supplies. The unipolar power supplies are expected to have a current stability within 10 parts per million (ppm) of the full scale. The currents must be calibrated to the specification and confirmed with independent and accurate measurement. The bipolar power supplies for the fast correction magnets are required to have a wide output current bandwidth in order to minimize the impact on the real-time feedback system for the beam position correction. There are also new requirements for the power supply controls and communications that are much more demanding than that in the existing APS accelerators. This paper will report the conceptual designs of the power supply systems and the R&D program that is developed to find solutions to the technical challenges.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPTY011

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)