共查询到19条相似文献,搜索用时 475 毫秒
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开关电源产生的噪声比常规线性电源产生的噪声大得多。介绍了开关电源噪声的类型,分析了开关电源噪声的产生原因,讨论了开关电源中噪声的抑制方法,介绍了几种抑制开关电源中噪声的实用电路。 相似文献
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介绍电流控制PWM开关电源的基本原理,并将其与电压控制PWM开关电源进行比较,指出了电流控制PWM开关电源的优点。最后给出了一个实用的电流控制PWM开关电源进行比较,指出了电流控制PWM开关电源的优点,最后给出了一个实用的电流控制PWM开关电源电路。 相似文献
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开关电源应用越来越广泛,但产生的电磁干扰严重影响开关电源效率及其使用。本文分析了开关电源产生电磁干扰的主要原因,并重点给出了相应的抑制措施,以提高开关电源的电磁兼容性。 相似文献
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浅谈开关电源的技术发展趋势 总被引:1,自引:1,他引:0
开关电源技术近十年来得到了突飞猛进的发展。以开关电源技术为核心的通信用开关电源得到了广泛应用。高频化、数字化、小型化、高功率密度等是开关电源技术的发展趋势。 相似文献
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文章总结了线性电源和开关电源各自的优、缺点。通过比较,得出了线性电源必将被开关电源所取代的结论。因此,就开关电源给予了详细的归类性论述。为了我国开关电源技术及应用的蓬勃发展,文章结合开关电源的国内外发展动态,又明确提出其目前所面临的困难和急需解决的问题。 相似文献
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设计了一种基于片上变压器的隔离式DC-DC开关电源。通过分析影响开关电源能量转换效率的因素,设计了一种应用于隔离式DC-DC开关电源的LC振荡器,提高了隔离式开关电源的整体效率。采用CSMC 0.35 μm BCD工艺进行设计,并将该振荡器应用于隔离式开关电源。隔离式开关电源的输入电压为3.3 V,输出电压为5 V。仿真结果表明,时钟振荡频率为180 MHz,应用该振荡器的DC-DC开关电源最大输出电流达到62 mA,转换效率提高到35.6%。 相似文献
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刘振华 《中国电子科学研究院学报》2005,(6):38-40,44
本文分析了开关电源传导干扰的产生机理,讨论了开关电源传导发射的实验室测量方法。对实际的开关电源进行了测试和分析,建立了传导干扰分析模型,最终得出了开关电源传导干扰的特点,进而提出了建立工程仿真模型的方法。 相似文献
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Fang Lin Luo Hong Ye 《Industrial Electronics, IEEE Transactions on》2004,51(3):594-602
Micro-power-consumption technique requires high-power-density dc/dc converters and power supply source. Voltage lift technique is a popular method to apply in electronic circuit design. Since a switched capacitor can be integrated into a power IC chip, its size is small. Combining switched-capacitor and voltage lift technique can construct dc/dc converters with small size, high power density, high-voltage transfer gain, high power efficiency, and low electromagnetic interference. This paper introduces a new series of dc/dc converters-positive output multiple-lift push-pull switched-capacitor dc/dc Luo-converters. 相似文献
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Antonini G. Cristina S. Orlandi A. 《Electromagnetic Compatibility, IEEE Transactions on》1996,38(3):300-309
Since the efficiency of switched mode power supplies (SMPS) is much higher than that of linear power supplies, this type of supply has gained favor among designers and manufacturers. Switching frequencies extend from tens to hundreds of kilohertz with the result that radiation from circuits carrying switched current is becoming more of a problem. This paper addresses the modeling of the converter section of an SMPS in order to calculate the current distribution and the radiated electromagnetic field. The inhomogeneities in the circuit are by equivalent electrical parameters and a technique is introduced to take into account the fictitious effects on radiation due to the electrostatic terms in the dipole equations. The global approach is validated by comparison of the computed results with those measured for a simple and clearly arranged SMPS experimental setup 相似文献
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Peter Harrington Sudipto Chakraborty Bertan Bakkaloglu 《Analog Integrated Circuits and Signal Processing》2011,66(2):177-187
In order to deliver near-field electromagnetic power to a biomedical device or an RFID tag efficiently, the downlink signal
is preferred to be at a high voltage level. To reduce power consumption and meet low supply requirements, it is advantageous
for the remote device power supply to step-down the input voltage following rectification, typically using switch-mode regulators.
The output ripple of a switched capacitor converter is inversely proportional to the filtering capacitance at the output node
and switching frequency. In this paper, a hybrid DC–DC converter utilizing a switched capacitor regulator in master–slave
configuration with a linear regulator is presented. Linear regulator actively cancels the switching ripple, while low frequency
and DC current is provided by the switched capacitor converter. The converter is designed to receive an average input voltage
of 5 Vpk from the receiver coil, with an output voltage of 2 V, and 5 mA of output current. The proposed regulator is fabricated
in 0.35 μm technology. The power efficiency is measured to be 67%, with a nominal peak to peak ripple of less than 2 mV at
the output. 相似文献
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传导性电磁干扰是开关电源的主要干扰源,国际电磁兼容测试标准规定的电源产品EMC 指标己成为开关电源的一个重要性能参数。文中从开关电源的工作原理和元器件特性出发,对开关电源的电磁干扰机理进行分析,研究抑制开关电源中传导干扰的措施。着重研究了滤波器的抑制措施,从实际应用角度对滤波器中的电感、电容等元件的特性进行了分析,给出了实用的滤波电路和元件参数。真空接触器中开关电源的电磁传导干扰抑制的应用结果表明,使用滤波器等抑制措施对电磁传导干扰有很好的抑制效果。 相似文献
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文中分析了开关电源电磁干扰产生的机理,并对开关电源的电磁兼容问题进行了讨论,指出了解决开关电源电磁兼容问题的相应策略。 相似文献
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Zhu Shuanghe Ren Tianliang 《Electronics letters》1997,33(15):1271-1273
A late-model switched power supply (SPS) with a feedforward cancellation circuit is proposed. This type of power supply has the advantages of low ripple and high efficiency. Results of experiments show that the output ripple of the power supply is <1 mVpp 相似文献