共查询到20条相似文献,搜索用时 62 毫秒
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介绍一种应用于激光电源的IGBT功率开关器件进行脉宽控制的电路,它能满足激光电源的大功率,高稳定性以及高恒流性等要求。 相似文献
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国产脉冲电镀电源通常采用手动方式调节参数,因此在设定参数之后,只能以单一参数的脉冲波形进行电镀;某些国外电镀电源虽然实现了程控,但也存在一定的缺陷.如脉宽调节范围较窄,脉冲频率不可调等。针对上述缺陷,对传统脉冲电源进行了优化设计。新设计的APCP-150型程序控制脉冲镀银电源主要基于程控技术和斩波技术,以大功率半导体器件为主开关器件。通过PLC输出不同频率的脉冲信号来进行控制,以实现各种不同工艺要求的电镀,并在镀银生产中减轻了工人的劳动强度,节省了工时。 相似文献
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高功率脉冲半导体泵浦激光器阵列电源的设计 总被引:2,自引:0,他引:2
为满足高功率脉冲半导体泵浦激光器相干合成的特殊需要,设计6路同步输出的电源阵列,实现了工作电压0~400 V自适应调整、工作电流0~1 200 A、脉冲宽度200μs~1 000μs、重复频率1 Hz~20 Hz均可任意调整的高电压、大电流脉冲输出。在保证技术指标实现的同时,着重解决阵列电源的同步输出、电压自适应和可靠性保护等问题。试验结果表明,该阵列电源的同步一致性可达到99%,输出电流精度达到0.1 A,已在"六路激光相干合成"研究中得到应用。 相似文献
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目前油田原油含水率渐高,常规脱水方法已经不能满足.鉴于高压直流脉冲电脱水的种种优点以及高压脉冲电源研制难的现状,本文提出了一种基于脉冲同步叠加的方式产生高频高压脉冲的方法.文中详细介绍了脉冲同步叠加的原理,给出了高压脉冲形成电路结构,采用改进型PI控制器进行控制并建立了其系统框图.最后通过仿真分析,验证了电源实现的可行性. 相似文献
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Marx发生器LCC谐振充电工作仿真分析 总被引:1,自引:1,他引:0
为满足Marx发生器的充放电脉冲工作要求,提出采用恒导通时间-恒频率控制策略的LCC串并联谐振变换器作为IGBT开关Marx发生器的充电电源.利用Pspice软件和等效模型模态方法对断续模式工作的LCC变换器实现软开关的原理进行分析,给出设计原则.仿真结果表明变换器能够以较高效率满足Marx发生器从短路到开路的宽范围变动工作特性的充电要求,实现高达1KHz重复频率变频变脉宽稳定运行.所提出的方法为研发制造紧凑型一体化高重复频率Marx发生器式功率脉冲电源开辟了一条新路. 相似文献
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针对兰州重离子加速器冷却储存环(HIRFL-CSR)踢轨磁铁(Kicker)电源的需要,提出并介绍了Kicker电源监测系统的要求,主要针对闸流管误漏导通检测、脉冲宽度检测、脉冲宽度测量及脉冲计数等功能提出了电路的工作原理,并设计了具体电路;系统输入端采用光纤接口,而输出端采用了PLC数字I/O接口;该系统可以完成对Kitcker电源系统较为全面的状态监测,可方便地对电源系统状态进行监控。 相似文献
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This article describes the rationale for the multiphase creative problem solving process, and reports the findings from an empirical investigation conducted to facilitate the problem solving of managers. The ideational skills of the managers were assessed before and after training in a complete process of creative problem solving, along with their ideational attitudes, creative problem solving style (i.e., generator, conceptualizer, optimizer, or implementor), and evaluative skill (i.e., ability to recognize original ideas). The most important findings indicated that the training had a significant impact on the evaluative accuracy of the managers. They were significantly more accurate in their judgments about original ideas after training, both in their identification of original ideas and their recognition of unoriginal ideas. After training, the managers also gave more solutions and more original solutions to problems. Finally, several variables (e.g., the “preference for active divergence” attitude, and the conceptualizer process style) seemed to moderate the impact of training. Training was therefore effective, with specific effects that can be predicted from pre-training individual differences in attitudes and process style. 相似文献
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为发现我国国家标准与国外发达国家标准法规的差距,从根本上提高我国国家标准的总体质量,提升我国产品的质量安全水平,以关键指标(因子)为核心,研究国内外标准法规比对的工作流程,利用面向对象的方法设计,实现了国内外标准法规比对分析系统。该系统适用于所有产品国内外标准法规的比对工作。 相似文献
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为提高高等院校的管理水平和决策水平,充分利用校园网资 源,开发了高等院校行政财政分析与决策系统。解决了诸如数据的动态查询、自动生成报表 、网络环境下数据共享等技术问题,具有网上数据共享、图形界面友好和安全的保密措施等 特点。 相似文献
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Mark A. Reynolds 《Nexus Network Journal》2001,3(2):147-150
Geometer Marcus the Marinite explores how the geometric and harmonic means can be employed compositionally within a frame;
how means function in the development of organizational field grids; how means work to develop linear perspective and proportional
grids. 相似文献
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Goldman DB 《IEEE transactions on pattern analysis and machine intelligence》2010,32(12):2276-2288
We discuss calibration and removal of "vignetting" (radial falloff) and exposure (gain) variations from sequences of images. Even when the response curve is known, spatially varying ambiguities prevent us from recovering the vignetting, exposure, and scene radiances uniquely. However, the vignetting and exposure variations can nonetheless be removed from the images without resolving these ambiguities or the previously known scale and gamma ambiguities. Applications include panoramic image mosaics, photometry for material reconstruction, image-based rendering, and preprocessing for correlation-based vision algorithms. 相似文献
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