High-Voltage Repetition-Frequency Charging Power Supply for Pulsed Laser

Liu, Kun; Fu, Rongyao; Gao, Yinghui; Sun, Yaohong; Yan, Ping

doi:10.1109/tps.2015.2410299

Cited by 27 publications

(4 citation statements)

References 3 publications

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“…The high-voltage power supply adopts a series resonant full-bridge converters, which improve the response speed, system efficiency, and the stability and reliability [5,6]. To operate at a pulse repetition rate of 60 Hz, the HPTS utilizes six series of resonant charging power supplies.…”

Section: The Pulse Modulatormentioning

confidence: 99%

Design and development of the S-band high power test stand for multi-purpose applications at IHEP

Liu¹,

Zhou²,

Gan³

et al. 2022

J. Inst.

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A multipurpose S-band high-power test stand (HPTS) developed at the Institute of High Energy Physics (IHEP) of China is routinely used for radio-frequency (RF) conditioning of couplers and resonant structures, as well as other high-power experiments in the S-band frequency regime. The HPTS with a peak power of 230 MW was developed to meet requirements of various applications with multiple frequencies (2856 MHz/2998 MHz) and power levels (45 MW/50 MW/65 MW/80 MW) for different accelerator projects at the IHEP, e.g. the High Energy Photon Source (HEPS), Beijing Electron Positron Collider (BEPCII), Circular Electron Positron Collider (CEPC). This paper describes the design and implementation of the system in detail. The highlight of the HPTS is the impedance-matched design to accommodate different impedances, allowing a single pulse modulator to supply different types of klystron loads. The control system, developed under the Experimental Physics and Industrial Control System (EPICS), adopts a combination of Micro Telecommunications Computing Architecture (MTCA) based low-level RF system (LLRF) and programmable logic controller (PLC) based interlock unit controllers, and enables a real-time data acquisition and visualization. To ensure a high reliability and high-gradient RF power conditioning, the interlock unit integrates various protection features, like the short circuit load, high standing wave ratio, low vacuum, arcing detector, and abnormal dark current. It is worth mentioning that the entire conditioning procedure can be performed unattended automatically controlled. The test stand has been operated stably for more than 7,000 hours for many rounds of high-power RF conditioning with different power/frequency requirements, which indicates that the HPTS can provide a stable, reliable, and automatic high-power testing for the development of S-band related devices.

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Section: The Pulse Modulatormentioning

confidence: 99%

Design and development of the S-band high power test stand for multi-purpose applications at IHEP

Liu¹,

Zhou²,

Gan³

et al. 2022

J. Inst.

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show abstract

“…An expression for the range of inductance values can be obtained from ( 7)-( 10): (11) Equation (10) gives the range of inductance values that satisfy the symmetric phase shift to eliminate the current ripple.…”

Section: Inductor Designmentioning

confidence: 99%

“…Thus, operating LD in a pulse mode is recommended and offers a chance to exploit its performance. Generally, the output pulse current rising edge of high-power quasi-continuous pulse power supply is steep and a short time within 20 µs is always required [9], [10]. The development of laser power [11], has enhanced the demand for pulse power supply (PPS).…”

mentioning

confidence: 99%

Pulse Power Supply With Faster Response and Low Ripple Current Using Inductive Storage and Interleaving Technology

Yuan¹,

Xu²

2020

CPSS TPEA

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Switched mode pulse power supply is a promising technique for high-power quasi-continuous laser driver. Contrast to lossy linear laser drivers, switched mode laser drivers can achieve higher efficiency. However, many challenges have been proposed, such as fast pulse edge, low current ripple. This paper proposes a multiphase interleaved pulse power supply with energy recovery and inductive storage (MIEF-PPS). The basic concept of the topology is the inclusion of a multiphase converter with pulse forming circuits to the converter system, which decouples the current slew rate and current ripple. Using an inductive storage technology and pulse forming circuits, a shorter pulse current rising time is obtained. The inductor energy is fed back to the input source not discharged to the load, resulting in a fast pulse trailing edge and energy saving. Thus the pulse current response observed when using this proposed technique is found to be much faster when compared to the conventional interleaved buck driver. Moreover, a pre-charge method is proposed to overcome the challenge of digitally controlling the inductive storage. The proposed topology was simulated in MATLAB/Simulink and validated against the experimental results of a laboratory prototype, 360 W dual-interleaved pulsed power supply. Index Terms-Energy recovery, fast response, multiphase interleaved, precharge control, pulse power supply. I. IntroductIonH IGH-POWER semiconductor laser arrays are vital in many fields, such as medical, industrial, and military fields, because of their advantages such as having a small volume, low weight, high efficiency, good beam quality, high reliability, and long lifespan [1]- [4]. A laser diode (LD) is a current-driven device and ha s similar characteristics to a lightemitting diode. From the voltage-current (V-I) characteristic and the characteristic curve of the optical power and injection current (P-I) of a laser diode [5], [6], it is sensitive to current

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“…The system may be affected by the frequency fluctuation and harmonic disturbance of the power grid. As a result, the problems of spectrum leakage and fence effect caused by asynchronous sampling may be generated [14][15][16][17][18][19]. In order to suppress the spectrum leakage and fence effect, an improved FFT (Fast Fourier Transformation) algorithm based on a hybrid convolution window is proposed in this paper.…”

Section: Research On High Accuracy Data Processing Algorithmmentioning

confidence: 99%

Research into an Online Calibration System for the Errors of Voltage Transformers Based on Open–Closed Capacitor

et al. 2018

Energies

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Periodical calibration is necessary to ensure the accuracy and reliability of voltage transformers. The traditional calibration method requires the power to be off, and the calibration period for this method is too long, meaning that problems with the transformer cannot be found in time. In this paper, a voltage transformer error online calibration system based on open-closed capacitors is proposed. Two open-closed capacitors and other auxiliary devices are utilized to construct the standard voltage sensor. The outputs of the open-closed capacitors are compared with each other to realize accurate self-checking. The average value of the output is used as the final output, which can improve the system's accuracy and reliability. An improved algorithm based on a hybrid convolution window is proposed to extract the fundamental and harmonic signals. Test results show that the variation of the ratio error is less than 0.037%, and the variation of the angle error is less than 0.45'.

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High-Voltage Repetition-Frequency Charging Power Supply for Pulsed Laser

Cited by 27 publications

References 3 publications

Design and development of the S-band high power test stand for multi-purpose applications at IHEP

Design and development of the S-band high power test stand for multi-purpose applications at IHEP

Pulse Power Supply With Faster Response and Low Ripple Current Using Inductive Storage and Interleaving Technology

Research into an Online Calibration System for the Errors of Voltage Transformers Based on Open–Closed Capacitor

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