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Fast corrector power supply design for HEPS

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Radiation Detection Technology and Methods 2020年第1期4卷 56-62页

作者： Peng Liu Xu Wang fengli long Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

Background High-energy photon source under construction is a fourth-generation synchrotronradiation light source with energy of 6 Gev and ultra-low emittance(lower than 0.1 nm rad).The ultra-low beam emittance requires high beam *** In order to meet this requirement of low beam emittance,the fast close orbit correctionsystem is used to keep beam on the right *** fast close orbit correction system need fast corrector power supply to drive the calibration magnet to complete track ***,a fastcorrector power supply prototype with high bandwidth and low current ripple to improve the performance of the fast close orbit correction system to prove the high beam stability had *** The prototype use a novel multilevel switch-mode structure to provide the *** prototype adopts FPGA for full-digital control and use high-speed ADC with temperature *** using a precision sampling circuit(ADC+DCCT),the prototypeoutputs current ripple can meet the *** and conclusion The designed for HEPS meet the design *** test,the prototype has asmall signal bandwidth of 10 kHz and output current ripple lower than 20 ppm.

关键词： HEPS Fast corrector High bandwidth Low output current ripple Full-digital control MATLAB simulink

The design of the superconducting wiggler power supply system for HEPS-TF

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Radiation Detection Technology and Methods 2019年第3期3卷 106-111页

作者： Xu Wang fengli long Yao Gao Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

Purpose This paper describes the design of power supply system for superconducting wiggler in the project of high energy photon source-test *** includes three sets of high precision DC stabilized current power supplies for superconducting magnet excitation and three sets of quench protection assembly(QPA).A special magnetic load which has a very large time constant is studied in this *** this paper,a stable superconducting excitation power supply is developed,which can adjust the response quickly under the condition of very large load time ***,the energy dissipation circuit of the QPA is integrated into the power supply in an active quenching protection mode to accelerate the energy release of the superconducting magnet and protect the superconducting *** The main circuit topology,control algorithm,quenching protection circuit and interlocking logic function are designed for the superconducting magnet with large *** upper computer controls the switch of the three main power circuits through the serial port,sets the output current and adjusts the parameters according to the *** Through a series of scientific and rigorous experiments,the rationality of superconducting wiggler magnet power supply scheme is *** output current stability test and output voltage ripple test of the power supply meet or exceed the requirements of the magnet system.

关键词： HEPS-TF Superconducting magnet power supply Quench protection assembly

Design of digital controller for HEPS corrector power supply

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Radiation Detection Technology and Methods 2023年第3期7卷 387-391页

作者： Xiaoling Guo fengli long Chao Han Yao Gao Wentong Su University of Chinese Academy of Sciences Beijing 100049China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China

Purpose In order to realize the control of current closed loop in HEPS corrector power supply,a digital control board is *** The control board uses the latest FPGA to realize digital processing and uses two different AD chips to realize current and voltage sampling,*** order to achieve high-precision closed-loop control,an effective closed-loop control program is *** The controller has been widely used in HEPS projects,and its control effect has been *** In order to realize control and reduce power cost,the controller is *** testing experiments show that the controller has excellent performance,reliable operation and low cost.

关键词： Corrector power supply Digital controller FPGA HEPS

Research on power supply of booster based on PWM rectifier

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Radiation Detection Technology and Methods 2020年第4期4卷 456-464页

作者： Yang Li Pengfei Wei Peng Liu Jing Zhang fengli long Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

Purpose The magnet power supply system of HEPS mainly includes the linear magnet power supply,the booster power supply,the transportation line magnet power supply and the storage ring magnet power *** to the physical design requirements,the output current of the booster magnet power supply is a current with a DC bias period of 1 Hz,and the waveform can be a sine wave or a trapezoidal wave(Jiang et *** Sin Phys Mech Astron 44(10):1075-1094,2014).The dipole magnet of the booster should be powered in series,the inductance value is relatively large(about 160 mH),and the power of the power supply reaches several hundred *** The three-phase PWM rectifier controls the orderly turn-on of power electronic devices and takes the input voltage phase of the power grid as the command current phase to make the input current waveform follow the power grid voltage,so as to achieve the purpose of improving the power *** this paper,the PWM rectifier is modeled and simulated,and based on the simulation,an experimental prototype is *** The experimental results of the power supply prototype of the PWM rectifier show that the PWM rectifier can achieve high power factor operation on the grid side(Akagi and Sato,in:Control and performance of a flywheel energy storage system based on a doubly-fed induction generator-motor for power conditioning,1999).Conclusions The PWM rectifier can be used in the power supply of the booster and has a very good application prospect.

关键词： PWM rectifier Booster power supply Power factor DSP

Development and testing of high precision and stability power supply for high energy photon source

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Radiation Detection Technology and Methods 2024年第2期8卷 1280-1285页

作者： Yang Li Suying Chen Yuting Liu Peng Liu Xiaoling Guo fengli long Institute of High Energy Physics Chinese Academy of SciencesBeijing100049China University of Chinese Academy of Sciences Beijing100049China

Purpose The high energy photon source(HEPS)is the fourth-generation synchrotron photon *** with the third-generation synchrotron photon source,the brightness is 100-1000 times higher,and the electron emittance of the storage ring is low to the diffraction limit of *** physical calculations,it is required that the stability of the storage ring quadrupole magnet power supply be better than 10 ppm,and the accuracy of output current be better than 80 *** high demand for technical parameter poses a challenge to the development of high precision and stability power *** The main circuit topology of the power supply adopts a phase-shifted full bridge soft switching scheme,which avoids interference caused by switching noise and improves power stability and *** high-precision digital power supply controller based on FPGA improves the sampling speed and control accuracy of the power supply,and the constant temperature control circuit ensures that the output current of the power supply meets the requirements of HEPS for power supply *** In the batch testing section,a testing facility was built to test the stability,accuracy,repeatability,voltage ripple,and other parameter of high precision and stability power *** a year and a half of testing,the performance tests of 1066 power supplies,including linear accelerators power supplies,booster power supplies,storage rings power supplies,dipole and quadrupole combined power supplies,dipole and quadrupole power supplies,were *** results all met and exceeded the design *** The HEPS high precision and stability power supply meets the design requirements in terms of current stability,accuracy,repeatability,voltage ripple,and other *** batch test results show that the power supply performance using the full bridge phase shifting soft switching technology combined with high-precision digital controller scheme is excellent,a

关键词： Current source Full bridge phase shifting Digital control-High stability Batch testing

Simulation for accelerator dynamic power supply based on current-source PWMrectifier

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Radiation Detection Technology and Methods 2018年第2期2卷 133-139页

作者： Yang Li Qing Zhou Peng Liu Jing Zhang fengli long Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

Purpose The booster power supply of high-energy photon source is dynamic power supply,and the output is 2-Hz bias sine ***-source rectifier(CSR)topology can achieve the 2-Hz current *** In order to get the output current and good power factor of the power grid,the algorithm of“indirect current control”is *** method needs to measure the voltage of three phases and calculates several certain parameters of the *** control strategy based on the“indirect current control”of the CSR is built in the Simulink simulation *** and algorithms are described in detail,and the control block diagram and simulation model are *** The control strategy can output the right current and make a good power factor in the side of *** The CSR topology,as a good choice of power supply of accelerator,has a well-researched prospect.

关键词： Dynamic power supply Current-source rectifier Indirect current control Power factor Simulink simulation

Design and development of strip electrode power supply for HEPS wiggler

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Radiation Detection Technology and Methods 2024年第2期8卷 1155-1161页

作者： Yuting Liu Yang Li Yunze Du fengli long Xiaoling Guo Pengfei Wei Chao Han Yao Gao Institute of High Energy Physics Chinese Academy of SciencesBeijing100049China University of Chinese Academy of Sciences Beijing100049China

Purpose The high-energy photon source(HEPS)is the first fourth-generation synchrotron photon source in China(Jiang et *** Sci Sin Phys Mech Astron 44:1075-1094,2014).The strip electrode and its power supply provide necessary hardware support for correcting the magnetic field of the wiggler as reported by Zhao and Yin(Particle accelerator technology,Higher Education Press,Beijing,2006).The design of the conventional power supply for accelerators,with a large output current and high output voltage,making it easy to achieve high stability of the output *** strip electrode power supply poses difficulties in achieving high stability due to its small output current and *** of size limitations,as well as the requirements of the power architecture,there are currently no commercial products for this type of power *** Designed and developed 32 strip electrode power *** the large number of power supplies and limited space,a rack structure design was adopted,placing all power supplies in one *** main circuit of the power supply adopts a full bridge transformation structure(Chao et *** Radiat Detect Technol Methods 6:470-478,2022),and the control scheme adopts full digital control based on FPGA(long and Cheng in At Energy Sci Technol 43:780-784,2009).The power supply has two control modes:local operation and remote operation as reported by Lu(Particle accelerator technology,Hunan University,Changsha,2010).Results The test shows that all power supplies meet the indicator requirements,with a stability of less than 100 *** The strip electrode power supply can effectively correct the multipole integral field error and improve the integral field performance of the wiggler.

关键词： Strip electrode power supply Full bridge converter Digital control-High stability

Development of corrector magnet power supply for high energy photon source

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Radiation Detection Technology and Methods 2022年第4期6卷 470-478页

作者： Han Chao long fengli Gao Yao Wei Pengfei Liu Yuting Guo Xiaoling Chen Suying Du Yunze Institution of High Energy Physics Chinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

Purpose High Energy Photon Source(HEPS)requires high quality,high energy beam and ultra-low emittance of 0.1 nm·rad,which puts forward high demand for power *** this paper,a high-performance corrector magnet power supply is developed to calibrate and adjust beam track within a certain bandwidth range to ensure the stability of beam *** The prototype of power supply adopts the new"One control Two"control mode,which adjusts the performance of two power supplies simultaneously based on digital *** The experimental results show that the stability of the power supply is lower than 20 ppm,which is far better than the design *** ripple is less than 10 mV,and other performance indexes meet the physical design requirements,which can well meet the requirements of HEPS *** After a lot of experiments and tests,all the parameters passed the design *** successful development of this power supply has laid a foundation for the successful application of HEPS.

关键词： HEPS Corrector power supply Stability Voltage ripple

Design of control algorithm for accelerator magnet power supply with large time constant load

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Radiation Detection Technology and Methods 2020年第3期4卷 383-391页

作者： Xu Wang Peng Liu fengli long WenTong Su Yao Gao XiaoLei Shi Tao Zeng GuanJian Wu Jian Cheng Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

Objective High Energy Photon Source-Test Facility(HEPS-TF)is a pre-research project for the construction of high energy synchrotron radiation source in the 12th five-year plan *** purpose is to research the key technology and develop the key equipment of high energy synchrotron radiation *** 3W1 magnet is the first self-developed superconducting wiggler magnet in China,and it is also one of the key research topics of *** author has completed a new digital closed-loop control algorithm for the superconducting 3W1 magnet with large load time constant and the nonlinear characteristics of inductance increasing with current,namely three-branch structure *** the face of the rapid development of high energy accelerator technology,the application of intelligent technology has become an inevitable development trend in the field of accelerator magnet power supply *** the digital control of accelerator magnet power supply has been widely used,it is the first time to apply the new closed-loop control algorithm to realize fast adjustment and precision tracking in accelerator superconducting magnet power supply in *** According to the nonlinear characteristics of inductance and output current of superconducting magnet,a new digital closed-loop control algorithm for the load of superconducting magnet power supply with large time constant is *** This algorithm is quite different from the traditional algorithm and can attain the independent tracking and adjust-ment of the control ***,by testing the ripple,error and stability of superconducting 3W1 magnet power supply,the correctness,practicability and reliability of power supply system as well as the digital control algorithm are *** results provide a new idea for the control of accelerator magnet power supply.

关键词： Closed-loop control algorithm Load time constant Superconducting magnets Three-branch structure