High-power High-efficient and Simplified High-frequency Switching Power Supply for Electrolytic Plating

针对大功率电解电镀开关电源的输入整流级引起的无功和谐波等电能质量问题,研究了一种基于高效PWM整流的高频开关电源。该电源前级整流器仅用4个开关管来进行PWM整流,后级采用半桥逆变器进行高频变换,显著减少了开关数量。针对三相四开关PWM整流器,推导一种基于开关模型的无差拍控制方法,该方法可实现系统的快速、无差整流。针对多台开关电源的并联均流问题,提出一种基于虚拟阻抗的自均流控制方法,可实现多台电源的均流稳定运行。通过仿真与实验验证了所提结构和控制方法的正确性。

Simulation realization of skip cycle mode integrated control circuit in the switching power supply with low standby loss

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.

Reconstructing RIBLL Switching Power Supply in Heavy Ion Research Facility in Lanzhou

RIBLL (Radioactive Ion Beam Line in Lanzhou) is an important part of HIRFL (Heavy Ion Research Facility in Lanzhou). RIBLL power supply system was founded in 1996, Seven “hard” switching power supplies were employed. They were all half-bridge converters. Fig.1 is the main circuit of the converter. And table 1 shows the output parameters.

A new high-performance AC/DC power factor correction switching converter based on one-cycle control technology and active floating-charge technology

A new family of converters,high-performance AC/DC power factor correction(PFC) switching converters with one-cycle control technology and active floating-charge technology,was derived and experimentally verified.The topology of a single-phase CCM and DCM Boost-PFC switching converter was also analyzed.Its operating prniciples and control methods were expounded.Based on these,a new type of AC/DC switching converter circuits for PFC combined with one-cycle control technology was presented herein.The proposed AC/DC switching converter significantly helps improve the converter efficiency and its power factor value.

Reducing the minimum output power of soft-switching inverter arc welding power supplies

The full-bridge zero-voltage and zero-current switching inverter, which can adjust the output power by keeping the duty-cycle of lagging arm constant, changing the duty-cycle of leading arm, is a common circuit topology of soft-switching inverter arc welding power supplies. However, the output power still remains a certain value when the duty-cycle of leading arm decreases to zero. The working-mode of soft-switching inverter and the waveforms of major parameters with the condition of duty-cycle of leading arm being zero are studied in this paper. U-1 characteristic experiments prove that the minimum output power of soft-switching circuit, which depends on the charged voltage of capacitors in parallel with leading arm, can be decreased by reducing the duty-cycle of lagging arm. By switching working-modes between half-bridge and full-bridge, the output power can swing from zero to the power rating.

Modeling of Canonical Switching Cell Converter Using Genetic Algorithm

The working of Canonical switching cell(CSC)converter was studied and its equivalent circuit during ON and OFF states were obtained.State space model of CSC converter in ON and OFF states were developed using the Kirchhoff laws.The state space matrices were used to construct the transfer functions of ON&OFF states.The step response of the converter was simulated using MATLAB.The step response curve was obtained using different values of circuit components(L,C1,C2 and RL)and optimized.The characteristic parameters such as rise time,overshoot,settling time,steady state error and stability were determined using the step response curve.The response curve shows that there is no overshoot;the rise time and settling time are very low as expected for a converter and its stability is very high but the amplitude is very.The circuit was tuned to attain the expected amplitude using PID controller with the help of Genetic algorithm.The excellent results of circuits’characteristic parameters are very useful guideline for constructing such CSC converters for DC-DC conversions.The circuit characteristic parameters are useful in constructing such CSC converters for DCDC conversions in driving solar energy using solar panel.

Analysis and Comparison of Power Electronic Converters for Conventional and Toroidal Switched Reluctance Machines

Different power electronic converter topologies are introduced in this paper for both Conventional Switched Reluctance Machine (CSRM) and Toroidal Switched Reluctance Machine (TSRM) drive systems. Their commutation, switch and diode currents, power losses, and efficiencies under over modulation operation are analyzed and compared for converter characteristics study, performance evaluation and topology selection for CSRM and TSRM drive systems. The switch and diode silicon volumes required for each CSRM and TSRM drives are also compared according to their corresponding currents at the equivalent machine torque versus speed operating points.

A Novel Method of Auxiliary Power Supply Used in Wide-Range High Voltage Input DC-DC Converter

In high voltage input DC-DC converter, auxiliary winding of isolation transformer is usually used to supply power for control circuit. Due to the wide-range of input voltage, the variable output voltage of auxiliary winding will cause a series of problems, such as variable drive pulse amplitude, increased driver switching devices loss and drive transformer core saturation. This paper analyzes the influence of variable output voltage of auxiliary winding in detail. A novel method is proposed to solve the problem of large variation range of auxiliary winding output voltage, which is adding a buck converter between the auxiliary winding and the control circuit. A dual switch forward convert has been designed with 300 V - 800 V input and 24 V/5 A output. The results show that this method is effective by comparing the different results of using buck converter or not.

Analysis of Switching Overvoltage in Regional Grid with Small Hydropower Plants

Present-day small hydropower plants (SHPs) have a large development potential because of the increasing interest in renewable resources and distributed energy generation, therefore, there are many SHPs in places of China where are rich in water resources. However, it has caused overvoltages in the distribution network, and which is even worse for the switching overvoltage such as isolated network operation, changing power supply path. The simple network model is used to analyze the reasons of the switching overvoltage, and the simulation software DIgSILENT/PowerFactory is used to check out the results of the theoretical analysis.

A Study of High-Power Thyristor Switch of Poloidal-Field Power Supply System in HT-7U Super-Conductive Tokamak

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.

Application of GaN in Hard-switching Converters:Challenges and Potential Solutions

This paper overviews the benefits,challenges,research trends and potential solutions on the design and application of gallium nitride(GaN) technology in hard-switching power electronic converters from the device level up to converter level.

智能开关电源集成电路TOPSwitch的分析

近年来 ,由于便携设备的增多 ,对供电单元电路小型化的要求越来越迫切 ;各国政府对电源系统环保 节能的要求也更加严格。这些都要求有效率更高、集成度更高的开关电源加以配合。本文反向剖析了美国 Power Integration公司的 TOPSwitch系列智能开关电源集成电路芯片 ,在系统地分析及全面的计算机仿真的基础之上 ,给出该电路的工作原理、设计方法及其应用。该集成电路除了一般的 PWM控制功能外 ,还集成了自动重启功能 ,过流、过热保护功能 ,大功率 MOSFET等。具有效率高 ( AC/DC转换效率可高达 90 % )。外围元件少等特点 ,具有多项专利。是目前国际上最先进的智能开关电源产品之一。该电路的芯片生产工艺 ,更是集高压 ( 70 0 V)大功率 (数十瓦 )、数模混合、双极 /CMOS兼容等最先进的半导体技术于一体 ,世界上目前只有极少数几家公司具有生产该类电路的能力。

基于TOPSwitchⅡ的开关电源设计

TOPSwitchⅡ系列芯片是PowerIntegration公司生产的开关电源专用集成电路,他将脉宽调制电路与高压MOSFET开关管及驱动电路等集成在一起,具备完善的保护功能。使用该芯片设计的小功率开关电源,可大大减少外围电路,降低成本,提高可靠性。介绍其内部结构和工作原理,给出几种应用于反激式功率变换电路的典型用法,并给出一种反激式开关电源的实用电路。

Study on a Highly Stabilized Power Supply for Hybrid-Magnet Superconducting Outsert

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.

用Topswitch芯片设计的反激式开关电源

Topswitch系列芯片是PowerIntegration公司生产的开关电源专用集成电路 ,它将脉宽调制电路 (PWM )与高压MOSFET开关管及驱动电路等集成在一起。使用该芯片设计的小功率开关电源 ,可大大减少外围电路 ,降低成本 ,提高可靠性。本文介绍了Topswitch系列芯片的工作原理及用该芯片制作的 3 0W反激式开关电源 。

一种基于TOPSwitch—GX的变频器开关电源

设计了一种基于TOPSwitch—GX的变频器专用开关稳压电源。该电源给系统控制板以及IGBT驱动电路供电,并保证该开关电源的电压稳定。文中主要介绍了TOPSwitch—GX系列芯片的特点、工作原理以及开关电源的设计,并着重分析了变压器的设计。该开关电源经现场检验,性能良好,满足设计的要求。

基于TOPSwitch-GX芯片的开关电源设计

采用将PWM控制器和MOSFET功率开关自启动电路、功率开关管、PWM控制电路及保护电路一体化的开关电源集成模块芯片是新一代中、小功率开关电源设计的主流发展趋势。电路的高度集成化有助于改善电源的电磁兼容性,极大地提高了电源的效率,简化开关电源的设计和缩短新产品的开发周期。详细阐述了TOPSwitch-GX系列芯片的特点,以无线电动钻充电电源为例,介绍了其电路设计的方法,其中着重介绍了运用计算机辅助软件PI Expert进行电源模块设计以及外围电路设计的情况。最后,给出了该开关电源性能测试结果。

Design of intrinsically safe power supply

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

基于TOPSwitch-GX系列芯片的开关电源设计与实现

介绍了美国PowerIntegration公司最新研制的开关电源集成芯片TOP-Switch-GX系列的主要特点,设计了一款基于此系列芯片的多路输出单端反激式开关电源,阐述了设计的主要步骤,给出了设计注意事项及试验结果。

一种基于Topswitch-GX的变频器专用开关电源

设计了一种基于Topswitch-GX的电机调速开关稳压电源。该电源给系统控制板以及IGBT驱动电路供电,并保证该开关电源的电压稳定。着重介绍了Topswitch-GX系列芯片的特点及工作原理以及开关电源的设计,并重点分析了变压器的设计。该开关电源经现场检验,性能良好,满足设计的要求。