共查询到18条相似文献,搜索用时 766 毫秒
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目前,DC-DC开关功率变换器的非线性现象的研究已发展到了混沌的控制与应用研究.本文论述了对DC-DC开关变换器的混沌现象及其应用,并展望了混沌开关变换器的应用前景. 相似文献
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阐述了一种小功率太阳能电池模拟装置。该模拟装置由AC-DC变换器与DC-DC变换器组成,AC-DC变换器将交流输入转换成直流电,DC-DC变换器将该直流电转换成具有太阳能电池输出特性的直流电。采用数字信号处理器MO-TOROLA56f801来控制.控制方法采用单极性SPWM法,模拟太阳能电池特性曲线采用三次样条插值算法。该控制方案已经在实验室得到验证,实际效果令人满意。 相似文献
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双向DC-DC变换器由于功率开关切换和双向能量流动而呈现典型的混杂特性。该文依据双向DC-DC变换器的状态方程,分别建立了Buck与Boost工作模式下的混杂自动机模型,并提出了双向DC-DC变换器的混杂控制算法。运用Matlab/Stateflow对双向DC-DC变换器混杂控制系统进行仿真,通过与传统的PI控制策略进行对比,结果表明该文提出的混杂控制算法响应速度更快、控制进度更高,具有重要的理论和工程价值。 相似文献
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随着电子技术的高速发展,各式设备如手机、笔记本电脑、PDA等的功能日趋复杂,性能不断提高,需求的供电电压也不尽相同。现有的集成电源芯片已无法满足这些设备的功率需求和性能要求,因此对可调高功率DC-DC变换器的深入研究有很重要的实际意义。提出一种基于DSP芯片的DC-DC变换器设计方案。通过实验验证,该变换器实现了直流电压12 V-24 V的转化,且输出电压可以在24 V-32 V之间调节,用户可以根据实际的需求进行调整。与此同时,该变换器的输出功率可达到近30 W,且输出纹波电压小,DC-DC变换效率较高,对输入电压稳定性要求高的设备有一定的实际应用意义。 相似文献
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对嵌入式系统可使用的4类电源芯片——普通线性稳压器、低压差线性稳压器、电容式DC_一IX;转换器(即电荷泵)、电感式IX2IX2转换器——进行了原理介绍和特点分析,提出了电源芯片选型的原则,最后给出了一个电源设计实例。 相似文献
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The output of renewable energy is the power of low voltage and high current rated designs. Due to the output voltage being too low it does not meet the required maximum voltage load requirements. Therefore, in order to meet the high voltage load, the required limit of the power converter (DC-DC) is used to increase the voltage to the maximum. . The DC output voltage from a renewable energy source is given as input to a DC-DC converter, and the output generated from the converter is used to drive a load. KY boost converter is one of the recently developed DC-DC converters to reduce output voltage ripple. It is suitable for operation in equipment to below low ripple conditions. The disadvantage of this converter is that the boost voltage is a very low design parameter. To obtain the desired boosted voltage, and also to reduce the output voltage ripple, an optimized algorithm is used. Compared with the existing Drosophila optimization technology, the proposed Adaptive Vector Reference Control (AVRC) Method has higher convergence characteristics and lower output ripple. The simulation results are verified by MATLAB simulation with hardware results. The hardware is developed using the Xilinx FPGAs SPARTAN 6A controller, which simplifies the XC3S500E development board prototype in addition to providing additional flexibility for further improvements. The results clearly show improved performance and validate the model. 相似文献
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Yogesh V. HOTE 《控制理论与应用(英文版)》2012,10(4):465-469
In this paper,an analytical technique is presented for time domain analysis(transient and steady-state response) of perturbed PWM push-pull DC-DC converter using interesting corollary on Kharitonov’s theorem.The main advantage of the proposed analysis is that even though the transfer function model of a PWM push-pull DC-DC converter is perturbed,the complete analysis has been done on a linear transfer function model of a PWM push-pull DC-DC converter. The proposed analysis is verified using MATLAB simulation.This analysis will be very much useful to power electronics engineers,since the technique is very simple and computationally efficient and easily applicable in precise applications such as aerospace applications. 相似文献
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The DC-DC converter is used for different applications which needs higher voltages when compared to the input source. The boost converter is one of the most efficient methods to choose DC-DC Converter in different ways. The purpose of the proposed method is to reduce the area of VLSI design logic and power consumption. Boost converter topology is difficult because it has a large component. The proposed work of four transistor comparator based PWM (Pulse width Modulator) that can be used in DC-DC boost converter, which reduces the area, and power consumption of the entire system. This proposed work calculates the parameters of boost converter and the simulation performed using different duty cycle and parameters. Simulation results shows different duty cycles with different resistance and inductance parameters using boost converter. In addition to this the result carries out four transistor comparator output which is used to reduce the boost converter circuit design. PWM is based on the proposed four transistor comparator, which is used in the Cadence Virtuoso software using conventional CMOS technology. 相似文献