共查询到18条相似文献,搜索用时 62 毫秒
1.
2.
宋峰 《淮北职业技术学院学报》2012,(1):118+125-118,125
介绍了DF4内燃机车无线通讯设备DC-DC电源变换器的研发和工作原理。该装置采用噪声滤波电路、过压、过流等技术,较好地完成机车110V控制电源通过变换器转为15V和5V电源。其结构新颖,操作简单。 相似文献
3.
In comparison with several zero-voltage transition (ZVT) inverter topologies,a double-PWM converter is presented using a simple ZVT topology.The rectifier and inverter of this double-PWM share a set of commutation circuit which can provide soft-switching for the power devices and the diodes.The commutation circuit consists of 1 auxiliary device,6 resonant inductors,and 12 diodes.Its topology is simpler than the conventional auxiliary resonant converter,leading to low loss and easy control.The control strategy and resonant working modes are analyzed.Experimental results show good performance of the system. 相似文献
4.
5.
电气类DSP实验教学内容设计及实验装置研制 总被引:3,自引:1,他引:2
介绍了一种既能体现DSP进行数字信号处理特性,又面向电气工程实际应用的电气类DSP实验教学内容的设计方案,阐述了与实验教学内容相适应的DSP实验装置的研制指导思想和基本功能。 相似文献
6.
双DSP数字信号处理实验装置 总被引:1,自引:0,他引:1
由两片TMS320C31芯片和两路A/D,D/A通道为核心,构成了一个方便有效的设计,调试DSP算法的实验环境,作为一个实验例子,在系统上实时实现了ITU-TG.728标准。 相似文献
7.
以UC3875为主控元件,利用移相控制实现电压的零电压转换,对移相控制策略及控制过程进行分析,最后给出了实验电路图. 相似文献
8.
零电压开前谐振变换器设计 总被引:1,自引:0,他引:1
黄乐天 《中山大学学报论丛》2002,22(5):196-199
针对传统型PWM控制开关电源是硬开关 ,开关损耗大 ,不易提高开关频率 ,不利开关电源向小型化、轻量化发展等问题 ,提出利用零电压开关谐振技术实现功率开关管的软开关技术设计 ,从而降低开关损耗。以SG35 2 5为核心设计控制电路 ,提高系统的动态响应性能 相似文献
9.
10.
11.
This paper models a low-power high-frequency digitally controlled synchronous rectifier (SR) OUCK converter. The converter is a hybrid system with three operation modes. Digital PID controler is used. Key problems such as quantization resolution of digital pulse-width modulation (DPWM) and steady-state limit cycles of digital control switching model power supply (SMPS) are discussed, with corresponding solutions presented. Simulation of a digital control synchronous buck is performed with a fixed-point algorithm. The results show that the described approach enables high-speed dynamic performance. 相似文献
12.
13.
An accurate circuit of PWM/PFM mode converting and a circuit of auto-adaptively adjusting dimension of power transistor are
described. The duty cycle of the signal when the control mode converts can be gained accurately by using ratios of currents
and capacitances, and an optimal dimension of power transistor is derived with different loads. The converter is designed
by 0.35 μm standard CMOS technology. Simulation results indicate that the converter starts work at 0.8 V input voltage. Combined
with synchronized rectification, the transfer efficiency is higher than 90% with full load range, and achieves 97.5% at rating
output. 相似文献
14.
15.
针对目前压缩采样技术中ADC有效位数低、信噪比损失大、低信噪比重构性能差等难题,提出了连续波模拟混频压缩采样、多通道压缩采样相干积累等方法,设计开发了信噪比损失小、分辨精度高的亚奈奎斯特高效采样实验平台。该实验平台的开发对推动高分辨、高灵敏度空间探测、传输技术的发展具有重要价值。 相似文献
16.
直流斩波电路实验装置的研制 总被引:1,自引:0,他引:1
介绍开发本实验装置的背景,简述降压较波电路和升压较波电路的原理,并叙述实验装置的设计思路和设计结果,最后给出装置的实验结果,表明该实验装置性能可靠,符合本科生实验要求。 相似文献