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文章首先分析了大功率线性脉冲调制器回扫充电电源的工作原理,同时简要地介绍新型场控器件IGBT;然后着重介绍一个4.5kW回扫充电电源的设计方法,包括主回路参数选择、Driver电路的设计、C/P电路及Snubber电路的设计;最后介绍本系统实际运行情况及参数指标的测试。 相似文献
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回扫充电技术在高压大功率线性调制器上的应用 总被引:3,自引:0,他引:3
基于现有线性调制器直流电源充电技术的不足提出了回扫充电技术,具体分析了线性调制器回扫充电技术的工作原理,结合某雷达高压大功率线性调制器介绍了回扫充电变压器的设计。 相似文献
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改善回扫充电调制器输出脉冲稳定度的措施 总被引:2,自引:0,他引:2
随着现代雷达发射技术的不断发展,以及电源逆变技术的日益成熟,新颖的调制器线路层出不穷,其中回扫充电调制器便是上述两种技术有机结合的产物。这种调制器以其自身的优越性能会越来越受到发射机设计师的关注。本文针对影响回扫充电调制器输出脉冲幅度稳定度的主要因素阐明了自己的观点,并提出了具体的改善措施。 相似文献
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介绍了新一代C波段大功率低相位噪声PD天气雷达发射机的性能、组成。重点介绍了发射机设计中采用的全固态调制器技术(包括回扫充电技术)、充电校平技术以及同步交流方波稳流灯丝电源技术。该发射机具有技术新、相噪低、可靠性高等特点。 相似文献
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本文介绍一种适用于线性脉冲调制器、脉冲激光器以及脉冲电压源负载的阶梯充电电源,并由此而构成组合式精密阶梯充电电源系统。首先对大功率谐振全桥式逆变器进行理论分析,然后介绍阶梯充电电源的充电控制方案及保护措施,最后讨论这种充电方法的主要特点。 相似文献
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高功率转换开关是限制大功率高压脉冲调制器重复运行频率的关键因素。为避免高功率转换开关的使用,开展了基于感应叠加原理的高压充电电源初步研究。建立了构成感应叠加充电电源基本单元的脉冲变压器调制电路的数学模型,确立了变压器磁芯截面的设计原则,以IGBT作为调制器的转换开关,开展了2级感应叠加充电电源的初步实验研究。实验表明与单元脉冲变压器输出电压相比,升压系数接近2,波形没有发生畸变。 相似文献
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本文介绍了一种适用于线性脉冲调制器、脉冲激光器以及脉冲电压源负载的阶梯充电电源,并由此而构成组合式精密阶梯充电电源系统。首先对大功能谐振全桥式逆变器进行理论分析,然后介绍阶梯充电电源控制方案及保护措施,最后讨论这种充电方法的主要特点。 相似文献
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《Electron Devices, IEEE Transactions on》1979,26(10):1394-1400
A novel power system, recently completed and commissioned, is described. Operating directly from an ll-kV, 50-Hz public supply, it provides the electrical energy for a burst mode, pulsed load. In each burst, the minimum energy delivered by the power system is 100 kJ at a rate of 330 kW. The pulse modulator operates at a peak charge of 105 kV and is capable of switching 200 MW over a range of pulse lengths and repetition rates. The high-voltage, high-current thyratrons used as the charge, discharge, and PFN energy dump switches were specially developed, four-gap, double-ended CX 1199B thyratrons. Supply voltage stepup transformers were designed to operate over bursts of variable pulse number, length, and rate, with the rectified unfiltered transformer output directly feeding the modulator charging circuit at up to 65 kV. Polarizing effects in the transformer core caused by the use of repetition rates equal to, or harmonically related to, the supply frequency were analyzed and effectively eliminated. Special winding techniques were developed to provide the strength and insulation for withstanding fault transients. While the power supply is capable of limiting fault currents occurring in the modulator and load, normal full system protection is provided by PFN energy dumping and, in the ac supply, by fast-acting vacuum contactors. Comprehensive control, monitoring, and mode selection are based on micrologic elements. By using direct, high-voltage modulation considerable flexibility is possible. The various alternative arrangements which derive from this design concept are explained. In addition, factors which determined the major features of the equipment are reviewed. The construction, layout, and performance are illustrated. 相似文献
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介绍了一种供线型调制器用的大功率组合逆变充电电源。阐述了它的工作原理,分析了充电电流的参数,讨论了组合应用时的注意事项。说明了此种调制器的优点,给出了实际应用的测试波形。 相似文献
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为了改善现有CO2激光器工频LC谐振充电时充电电压随激光器工作频率升高而降低、影响激光输出的稳定性和光束质量,不利于装置的小型化和轻量化的问题。采用全桥逆变结构和串联谐振软开关电路,研究了36kV/10kW高频高压充电电源。该电源系统采用三相380V交流电作为供电系统,大功率智能功率模块作为全桥逆变电路。逆变交流信号经串联谐振电路及高频脉冲变压器得到高压脉冲信号,高压脉冲经整流给负载电容充电,电源应用电压电流双闭环控制系统,输出电压、电流经采样及放大后,反馈到电源控制芯片SG3525,芯片SG3525通过判断反馈信号的大小,控制输出脉冲宽度调制驱动信号的占空比。激光器放电频率为25Hz时,电源输出电压为37kV,峰值输出功率为13.05kW,充电效率为0.826。结果表明,该高频高压充电电源适合用作CO2激光器的高压充电电源。 相似文献
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利用电流控制型脉宽调制器UCC3802芯片的特性和原理,提出一种单端反激式开关电源的设计方法,并分析其构成开关电源的整体电路结构和工作原理。最后进行数据测量和波形检测,实验结果表明符合设计要求,且提高电源性能和可靠性。 相似文献
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《Electron Devices, IEEE Transactions on》1979,26(10):1451-1455
The use of four-gap double-ended thyratrons in a 30- to 100-µs pulse modulator is described. The PFN-type modulator operates at 105-kV peak, charged from the 11-kV public supply, and powers an ill-matched and potentially unreliable load directly at 30 to 70 kV without a pulse transformer. The maximum repetition rate is 200 pps. The completed modulator has been delivered to the customer and successfully recommissioned. Satisfactory operation is reported with 200-MW 6-kJ pulses in bursts of average power up to 400 kW; this is well in excess of the published ratings of the tubes employed. The methods used to obtain this performance are discussed and the main details are given of pulse discharge, energy dump, and switched charge circuits appropriate to the thyratrons used. The possibility of uprating the modulator is mentioned, and certain recent developments in large thyratrons are discussed. These include a new pentode-type electrode system which should give improved performance with simpler deck circuitry. For extended bursts at long pulse lengths the realistic maximum capability of single tubes in current production seems to be about 1-GW peak at 2-MW average power. 相似文献
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本文介绍了一种电流控制型PWM控制器UC3843的特点和工作原理,并分析了其构成开关电源的整体电路结构和工作原理,最后提出了一种基于UC3843的单端反激式开关电源的设计方法 相似文献