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探析光控开关制作实验的教学方法
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作者 高源 《黑龙江科学》 2017年第11期114-115,共2页
光控开关制作属大学物理实验课程体系中的设计性实验项目。近年来,很多院校都开设了此实验,取得了一定的教学效果。结合光控开关制作实验基本内容,对如何更好地实施本实验教学,真正做到提升学生的自主设计能力提出参考建议。
关键词 光控开关制作 设计性实验 自主设计
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模拟制作双向开关
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作者 黎修远 《科学课(初中版)》 2003年第06X期44-44,共1页
关键词 双向开关 探究学习 初中 物理教学 电路 电学 开关制作 物理实践活动
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A NEW SOFT-SWITCHING PUSH-PULL THREE-LEVEL CONVERTER 被引量:4
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作者 马运东 阮新波 严仰光 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2002年第2期127-133,共7页
The application areas of conventional push pull converters are limited because of high voltage stress of switches (twice of input voltage). This paper presents a novel zero voltage and zero current switching (ZCS)... The application areas of conventional push pull converters are limited because of high voltage stress of switches (twice of input voltage). This paper presents a novel zero voltage and zero current switching (ZCS) PWM push pull three level converter in which the voltage stress of switches is input voltage. With phase shifted modulation strategy, the leading switches can only realize zero voltage switching (ZVS), and the lagging switches can realize ZCS when block capacitor and block diodes are added. Using the strategy, the converter overcomes the drawbacks presented by the conventional push pull converter, such as magnetic aberration, large switch loss, and voltage spike on switches, so it can get higher efficiency, and a wider application area. The operating principle of the new converter is analyzed and verified on a 600 W, 50 kHz experimental prototype. Several zero voltage and zero current switching PWM push pull three level converters are proposed. 展开更多
关键词 zero voltage and zero current switching push pull converter three levels
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ZERO-CURRENT AND ZERO-VOLTAGE SWITCHING PWM BOOST FULL-BRIDGE CON VERTER 被引量:1
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作者 周林泉 阮新波 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2003年第1期60-66,共7页
This paper proposes a zer o current and zero voltage switching (ZCZVS) PWM Boost full bridge (FB) conve rter. With series inductors, the leading switches can realize zero current swit ching (ZCS) in a wide load ra... This paper proposes a zer o current and zero voltage switching (ZCZVS) PWM Boost full bridge (FB) conve rter. With series inductors, the leading switches can realize zero current swit ching (ZCS) in a wide load range using the energy of the output capacitor. Ma king use of parasitic capacitors of the lagging switches and parallel auxiliary i nductance with the primary winding of the transformer, the lagging switches can realize zero voltage switching (ZVS) under any load. Compared with the ZCS PWM Boost FB converter, the new converter has no current duty cycle loss. Operat ional principle and parameter design are analyzed. Experimental results verify the effectiveness of the proposed converter. 展开更多
关键词 pulse width modulation (PWM) soft switching boost converter full bridge converter zero voltage s witching zero current switching
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Study of a Single-Phase Series Active Power Filter with Hysteresis Control
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作者 Mihail Antchev Mariya Petkova +2 位作者 Hristo Antchev Vanjo Gourgoulitsov Stanimir Valchev 《Journal of Energy and Power Engineering》 2012年第10期1635-1642,共8页
The paper presents results from a study of a series-connected single-phase APF (active power filter) with a control system based on hysteresis control, both with and without limitation of the maximum switching frequ... The paper presents results from a study of a series-connected single-phase APF (active power filter) with a control system based on hysteresis control, both with and without limitation of the maximum switching frequency. The general purpose of the series APF is to eliminate the low order harmonics of the source (grid) voltage. The filter operation at limited and unlimited maximum switching frequency is explained and it is described using building blocks and time diagrams illustrating the tracking down of the reference curve. Waveforms from the computer simulation and waveforms from the experimental tests of the filter are presented also for the two situations. Operations at limited and unlimited maximum switching frequency are compared regarding the quality of the voltage across the load, the complexity of the implementation of the control system, and the electromagnetic compatibility. The investigation proved capability of the series APF to achieve its general purpose using the hysteresis control methods studied (limited and unlimited switching frequency). 展开更多
关键词 Series active power filter APF hysteresis control frequency limitation.
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