A multichannel power supply for high power magnetrons

The paper describes characteristics and design principles of a multichannel power supply for CW magnetrons with RF power up to 3 kW. An advanced control system implemented in the power supply has resulted in its good operational properties as well as allowed providing adaptive procedures for the regulation of magnetron operation. A modular approach based on utilization of novel electronic components increases reliability and lowers weight and dimensions of the power supply.     

A power supply for a copper bromide vapor laser

A power supply for a copper bromide vapor laser with stepwise charging of the operating capacitance is presented. A technical solution intended for charging the operating capacitance to energies of about 1 J under automatic control of laser operation is described. The effect of the electric circuit parameters on the charging process of the operating capacitance is shown. The operating characteristics of the device are presented.     

A controlled stabilized high-voltage power supply for a photomultiplier tube

A small-size stabilized high-voltage power supply for a photomultiplier tube with remote digital and analog regulation of the output voltage is designed. The output voltage is smoothly regulated from 0.5 to 3 kV, the load current is 0–2 mA, and the ripple factor is 0.008%. The supply voltage is 12–16 V.     

A modular power supply for electrochemical etching

A power supply for the electrochemical etching of polycarbonate foils from radon dosimeters is described. Our modular design combines reliability, stability and low-cost by using standard components.     

A power supply for magnetron sputtering systems

A design and electric circuits of the power supply for magnetron sputtering systems with a power of up to 5 kW are described. The power supply is intended for operation in direct-current (DC) or pulse modes with a pulse repetition rate of up to 100 kHz. The arc suppression system limits the energy delivered to the arc discharge at about 110 mJ in the DC mode and 9 mJ in the pulse mode, respectively. The possibilities of optimizing coatings by selecting working parameters of the power supply were demonstrated by the example of thin-film coatings of two types (Ag and Ga-doped ZnO thin films).     

A power supply for simulating lightning-current pulses

The circuit diagram of a power-supply unit for simulating a positive lightning on a system of grounding current pulses is presented. The main criteria that governed the development of this facility are expounded. The design and order of operation of an experimental specimen of a power supply developed at the VNIIEF on the basis of a BMΓ-320 cascade magnetic-cumulation generator are considered. A calculation technique is described with which a device for the formation of current pulses of up to 90 kA in a standard grounding system has been developed.     

A modular bipolar power supply for high-power ion-plasma installations

The circuitry solutions, design, and main parameters of a modular pulse bipolar power-supply unit for high-power ion-plasma facilities are described. The modular principle of designing power supplies provided their application in various processes. The results of tests of the developed device as the power supply of a magnetron sputtering system with a power of 60 kW and a high-voltage power supply of the substrate bias voltage with a power of up to 40 kW are presented. The efficiency of applying bipolar pulses for preventing arcing at the magnetron cathode is experimentally demonstrated.     

一种新颖的超高频感应加热电源

通过对软开关技术的研究,提出了一种全新的双管LLC谐振负载电路拓扑,解决了传统感应加热过程中高频条件下开关损耗的问题.采用电感电流反馈控制,并加入电路保护环节进行保护,提高了电源的可靠性.该方案简单新颖,易于实现.实验结果有效地验证了理论分析,该电路可以实现零电压开通,提高电源的工作频率.     

一种大功率直流开关电源的主电路设计

开关电源设计最重要的2部分是主电路和控制电路。根据大功率直流开关电源的设计要求,结合大功率直流开关电源的工作原理、电路的拓扑结构、运行模式的特点及相关技术参数,本文进行性能分析并计算各项参数,通过计算所得的数据结果选择各元器件,设计出各个独立模块,最后组装成大功率直流开关电源的主电路。     

气相色谱仪通用电源的设计

设计了一种气相色谱仪通用电源.介绍了设计方案,通用变压器和加热丝的工作原理和结构.给出了实验验证结果.     

一种低功耗设备的无线感应供电技术

介绍了一种无缆线联接、依靠电磁场耦合感应的新型供电技术.并对其工作原理和关键技术进行了分析、设计并制作了简易原理装置.实验数据表明,该无线感应供电方式在一定距离范围内具有良好的能量传输特性,并适用于低功耗设备.     

发电厂设备安装工程施工机械的安全管理

施工机械的安全管理是发电厂设备安装工程施工安全管理的重要环节 ,现场施工机械的好坏直接影响安装工程的进度、安全。随着科技的发展 ,施工机械越来越先进 ,价格也越来越昂贵 ,一旦发生事故 ,将导致机毁人亡 ,既给企业造成巨大经济损失 ,又影响工程进度 ,损坏企业声誉。因此     

A power supply unit for discharging the plasma electron source

A power supply unit for discharging a low-temperature plasma generator based on discharge in the crossed electric and magnetic fields is described. The unit operates in a stationary mode with a preset stabilized (±2%) discharge current of up to 0.5 A and in a pulse mode (up to 20 A), taking into account special features of powering gas discharges.     

A high-voltage power supply based on a distributed capacitive energy storage

For the corpuscular plasma heating in the MST plasma device (Madison, United States), an injector of hydrogen atoms with 25-keV energy, equivalent at omic current of >45 A, and 20-ms pulse duration was designed and put into operation at the Budker Institute of Nuclear Physics (Novosibirsk, Russia) in 2009. The pulse repetition rate is 5 min. The output current of the ion source in the atomic injector exceeds 50 A. A high-voltage source with a 1.5-MW power was design ed for the high-voltage powering of the atomic injector. The run duration of the power supply with rated characteristics is >20 ms. The power supply is based on a distributed capacitive energy storage, which allows the power consumption from the industrial network to be reduced down to 10 kW at a pulsed load power of 1.5 MW. The high-voltage power supply smoothly regulates the output voltage from 0 to 30 kV and is capable of being quickly deenergized if high-voltage breakdown of the load takes place. The diagram and structural components of the high-voltage power system of the atomic injector are described, and its test results are given.     

The diagnostics of the mass characteristics of a power installation

Studies of direct and inverse spectral problems in terms of free oscillations of a power installation are carried out. The effect of mass characteristics of the power installation on free-oscillation frequencies is studied by the solution of the direct problem, and the increase in mass is shown to result in a decreasing frequency of oscillations. For the first time, the inverse problem, viz., the diagnostics of mass characteristics of the power installation by known oscillation frequencies, is set and solved. An algorithm for determining the mass of the filler and gas of the power installation is formulated. The problem of holding the specified safe-frequency range of oscillations of the power installation is investigated. It is shown that certain changes in the mass characteristics of the installation are sufficient to hold the specified oscillation frequencies when changing the physical parameters.     

一种电源试验装备的设计

为了解决电源质量监督与检验验收中工作效率低、质量隐患难发现、历史数据难利用等问题,该文设计了基于LabVIEW软件和嵌入式技术的实验装备检验系统。利用传感器采集检验项目中的电压、电流、纹波、噪声、加速度和输入电压,经过ARM处理后经通信电路发送给LabVIEW上位机软件,并依据技术指标给出检验结果。实验结果表明,该系统具有测试效率高,数据获取存储方便,故障诊断准确等优点。     

电力系统操作电源模块的辅助电源设计

设计了一台用于电力系统操作电源模块的辅助电源,采用了一种适合于较高电压输入的双管反激变换器的拓扑,分析了其工作原理,介绍了峰值电流控制模式的特点,并给出了变压器的主要参数及其设计步骤.给出了设计,并调试成功了1台约60 W三相输入、8路隔离输出的直流开关电源.实验结果证明:该电路既保留了反激变换器的结构简单、易于多路输出等优点,又解决了其在高压场合的开关应力大和安全性问题,非常适合于较高电压输入、中小功率、多路输出的直流电源应用场合.     

备用电源的无功功率自动补偿问题的研究

分析备用电源自投自复系统的无功功率自动补偿问题,导出了无功功率补偿问题的计算公式,确定了补偿装置及信号取样,设计了补偿控制电路,并用实例进行了说明。     

A high voltage pulsed power supply for capillary discharge waveguide applications

We present an all solid-state, high voltage pulsed power supply for inducing stable plasma formation (density ～10(18) cm(-3)) in gas-filled capillary discharge waveguides. The pulser (pulse duration of 1 μs) is based on transistor switching and wound transmission line transformer technology. For a capillary of length 40 mm and diameter 265 μm and gas backing pressure of 100 mbar, a fast voltage pulse risetime of 95 ns initiates breakdown at 13 kV along the capillary. A peak current of ～280 A indicates near complete ionization, and the r.m.s. temporal jitter in the current pulse is only 4 ns. Temporally stable plasma formation is crucial for deploying capillary waveguides as plasma channels in laser-plasma interaction experiments, such as the laser wakefield accelerator.