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Simulation realization of skip cycle mode integrated control circuit in the switching power supply with low standby loss 被引量:2
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作者 屈艾文 程东方 冯旭 《Journal of Shanghai University(English Edition)》 CAS 2007年第3期318-322,共5页
This paper explores and proposes a design solution of an integrated skip cycle mode (SCM) control circuit with a simple structure. The design is simulated and implemented with XD10H-1.0μm modular DIMOS 650 V proces... This paper explores and proposes a design solution of an integrated skip cycle mode (SCM) control circuit with a simple structure. The design is simulated and implemented with XD10H-1.0μm modular DIMOS 650 V process. In order to meet the requirement of a wide temperature range and high yields of products, the schematic extracted from the layout is simulated with five process corners at 27℃ and 90℃. Simulation results demonstrate that the proposed integrated circuit is immune to noise and achieves skipping cycle control when switching mode power supply (SMPS) works with low load or without load. 展开更多
关键词 standby loss skip cycle mode (SCM) switching mode power supply (SMPS) integrated control circuit.
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Study on a Highly Stabilized Power Supply for Hybrid-Magnet Superconducting Outsert 被引量:2
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作者 吴景林 龙佼佼 刘小宁 《Plasma Science and Technology》 SCIE EI CAS CSCD 2014年第9期890-896,共7页
The superconducting outsert of the 40 T hybrid-magnet in High Magnetic Field Laboratory (HMFL) of Chinese Academy of Sciences (CAS) requires a highly stabilized power supply. In this paper, two kinds of power supp... The superconducting outsert of the 40 T hybrid-magnet in High Magnetic Field Laboratory (HMFL) of Chinese Academy of Sciences (CAS) requires a highly stabilized power supply. In this paper, two kinds of power supply design are briefly presented and both advantages and disadvantages are analyzed. In order to overcome the drawbacks of switching power supply, a series regulated active filter is adopted and a new design is proposed which ensures cooperative relationship between the feedback control loops of the switching converter and the series regulated active filter. Besides, unlike the traditional switching power supply, which can generate positive voltage only, this new design can also generate negative voltage which is needed in the quench protection for the superconducting magnet. In order to demonstrate the effectiveness of the methodology, a low-power prototype has been accomplished. The simulation and experiment results show that the power supply achieves high precision under the combined action of two feedback control loops. The peak-to-peak amplitude of the output ripple voltage of the prototype is 0.063%, while the peak-to-peak amplitude of the output ripple current is 120 ppm. 展开更多
关键词 superconducting magnet switching power supply series regulating feedbackcontrol quench protection
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Design of intrinsically safe power supply 被引量:3
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作者 LI Rui-jin JIN Lin 《Journal of Coal Science & Engineering(China)》 2012年第4期443-448,共6页
Aiming to make a high power direct current supply safely used in coal mine production, this paper made a deep research on characteristics of intrinsically safe power supply, using the mathematical model established ac... Aiming to make a high power direct current supply safely used in coal mine production, this paper made a deep research on characteristics of intrinsically safe power supply, using the mathematical model established according to coal mine intrinsic safety standards. It provides theory support for the application of high power intrinsically safe power supply. The released energy of output short circuit of switch power supply, and the close related factors that influence the biggest output short-circuit spark discharge energy are the theoretical basis of the power supply. It is shown how to make a high power intrinsically safe power supply using the calculated values in the mathematical model, and take values from intrinsically safe requirements parameters scope, then this theoretical calculation value can be developed as the ultimate basis for research of the power supply. It gets the identification method of intrinsically safe from mathematics model of intrinsically safe power supply characteristics study, which solves the problem of theory and application of designing different power intrinsically safe power supply, and designs a kind of high power intrinsically safe power supply through this method. energy, flyback 展开更多
关键词 intrinsically safe circuit switching power supply output short circuit discharge characteristics output short circuit release
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Development of 8 MW Power Supply Based on Pulse Step Modulation Technique for Auxiliary Heating System on HL-2A 被引量:1
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作者 徐伟东 宣伟民 +1 位作者 姚列英 王英翘 《Plasma Science and Technology》 SCIE EI CAS CSCD 2012年第3期263-268,共6页
The high voltage power supply (HVPS) based on pulse step modulation (PSM) has already been developed for the auxiliary heating system on HL-2A. This power supply consists of many switch power supplies, and its out... The high voltage power supply (HVPS) based on pulse step modulation (PSM) has already been developed for the auxiliary heating system on HL-2A. This power supply consists of many switch power supplies, and its output voltage can be obtained by modulating their delay time and pulse widths. The PSM topology and control principle are presented in this paper. The simple algorithms for the control system are explained clearly. The switch power supply (SPS) module has been built and the test results show it can meet the requirements of the auxiliary heating system. Now, 112 SPS modules and the whole system have already been developed. Its maximum output is about 72 kV/93 A. The protection time is less than 5 t*s. The different outputs of this power supply are used for the electron cyclotron resonant heating (ECRH) system with different duty ratios. The experimental results of the entire system are presented. The results indicate that the whole system can meet the requirements of the auxiliary heating system on HL-2A. 展开更多
关键词 PSM HV power supply control algorithm switch power supply module
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A Study of High-Power Thyristor Switch of Poloidal-Field Power Supply System in HT-7U Super-Conductive Tokamak
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作者 温家良 刘正之 +1 位作者 付鹏 许家治 《Plasma Science and Technology》 SCIE EI CAS CSCD 2001年第5期1005-1010,共6页
Through theoretical analysis of thyristor switch, criterion of turn-off was derived for the design of thyristor switch. The expression of parameter design and its math model during the turn-off were deduced. The simul... Through theoretical analysis of thyristor switch, criterion of turn-off was derived for the design of thyristor switch. The expression of parameter design and its math model during the turn-off were deduced. The simulation and experiment have been accomplished to validate the analysis. 展开更多
关键词 A Study of High-power Thyristor Switch of Poloidal-Field power supply System in HT-7U Super-Conductive Tokamak HT
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Design and Implementation of Smart Power Voltage and Frequency Synchroniser in Power Distribution System
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作者 Isaac Kofi Mensah Prah Joseph Cudjoe Attachie 《Journal of Power and Energy Engineering》 2023年第4期1-16,共16页
Voltage and frequency are usually considered and assessed independently in the design and operation of electrical networks. However, these two are linked. Each and every malfunctioning electrical system has an impact ... Voltage and frequency are usually considered and assessed independently in the design and operation of electrical networks. However, these two are linked. Each and every malfunctioning electrical system has an impact on both voltage and frequency. This paper presents the opportunity for monitoring the distributed electrical energy by means of a system that monitors, controls, and provides a breakpoint based on high or low voltage and frequency tripping mechanism that avoids any damage to the load. The designed system comprised a switch mode power supply (SMPS), a direct digital synthesizer (DDS), and PIC16F876A microcontroller techniques for stable voltage and frequency outputs. Proteus design suite version 8.11 software and Benchcope SDS1102CN were used for modeling and simulation. The hardware prototype was implemented at a telecom cell site for data capturing and analysis. Test results showed that the implementation of the prototype provided stable and constant outputs of 222 V/50 Hz and 112 V/60 Hz which constituted 99% and 99.8% efficiency for voltage and frequency performance respectively. The paper also discusses different technologies that can be adopted by the system to mitigate voltage and frequency effects on customer appliances. 展开更多
关键词 Switch Mode power supply Direct Digital Synthesis Pulse Width Modulation H-Bridge Mosfet MICROCONTROLLER FILTERING and Rectification
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Characteristics and Applications of Parallel Equalization Circuits
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作者 Delin YANG 《Meteorological and Environmental Research》 CAS 2022年第4期62-66,共5页
Parallel equalization is widely used in contemporary times.The paper introduces several ways of working as well as advantages and disadvantages of switching parallel equalization circuits.And the UC3907 and UC3902 chi... Parallel equalization is widely used in contemporary times.The paper introduces several ways of working as well as advantages and disadvantages of switching parallel equalization circuits.And the UC3907 and UC3902 chips as the core of the high-power switch are taken as an example to introduce the application of power supply parallel equalization technology in real life,reflecting the advantages of parallel power supply.It could provide scientific basis and technical reference for meteorological environment. 展开更多
关键词 Parallel equalization switching power supply UC3907 UC3902
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Snubber Circuit for Marine Controlled-Source Electromagnetic Transmitter
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作者 SONG Hongxi ZENG Yijin ZHANG Wei 《Journal of Shanghai Jiaotong university(Science)》 EI 2021年第6期828-839,共12页
A high-power marine controlled-source electromagnetic transmitter(HP-MCSET)transmits a highfrequency conversion current on the sea floor.Some problems exist when the direct-current to alternating-current(DC-AC)launch ... A high-power marine controlled-source electromagnetic transmitter(HP-MCSET)transmits a highfrequency conversion current on the sea floor.Some problems exist when the direct-current to alternating-current(DC-AC)launch bridge(LB)is used in the marine controlled-source electromagnetic transmitter(MCSET).There is a high voltage peak in the LB when the insulated gate bipolar transistor(IGBT)is turned on and off.In some cases,the voltage stress of the IGBT can be exceeded,which may cause IGBT damage.Because the rise of the current steepness is relatively low and the output voltage has a voltage peak in the LB,a snubber circuit is added to the IGBT to suppress the voltage peak to improve the output current and voltage waveform.The suppression of the voltage peaks is analyzed and compared for several groups of snubber circuits.To meet the performance requirements of the MCSET,the optimal snubber circuit is selected to effectively suppress the voltage peaks at an output current of 1 kA.This method is verified by using a 70 kW MCSET and the experimental waveforms are provided.The simulation of the inductance obstruction load in seawater is necessary to determine the conditions for actual marine environment experiments. 展开更多
关键词 launch bridge(LB) switching power supply snubber circuit voltage peak marine controlled-source electromagnetic transmitter(MCSET)
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