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2种永磁阵列排布的涡电流效果比较
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作者 王飞 丁昀 +2 位作者 高祯 张芳莉 杨庆 《节能》 2018年第5期38-44,共7页
在风磁制热系统中,设计2种磁体阵列对比模型,一种用铷铁硼永磁体(40 mm×10 mm×5 mm)交错排列;另一种用磁方(10 mm×10 mm×10 mm)自行制作每5块构成一组的线型海尔贝克(Halbach)阵列环形排列。采用转子盘(1.5 mm厚铝... 在风磁制热系统中,设计2种磁体阵列对比模型,一种用铷铁硼永磁体(40 mm×10 mm×5 mm)交错排列;另一种用磁方(10 mm×10 mm×10 mm)自行制作每5块构成一组的线型海尔贝克(Halbach)阵列环形排列。采用转子盘(1.5 mm厚铝盘)在一定间隙下相对贴附有2种磁体阵列的定子盘转动,由于金属铝盘在不断变化的磁场中切割磁感线会发生涡流效应,产生焦耳热而导致铝盘温升,通过实验测量铝盘温度绘制温升曲线结合Maxwell软件模拟分析,得出海尔贝克环形排列下的温升效果要优于普通阵列。 展开更多
关键词 风磁制热 涡电流效应 HALBACH阵列
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一款家用轿车轮胎扎钉智能报警器
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作者 王明忠 杨瑞 《家电维修》 2023年第7期24-26,共3页
随着人民生活水平的不断提高,家用轿车走进了千家万户,给人民群众便利出行带来了诸多方便。国产轿车正在崛起,其配置不输合资车,舒适性和安全性充分彰显。譬如,360影像清晰直观,指向性更加明确,可以说是新手的福音;倒车雷达能够显示前... 随着人民生活水平的不断提高,家用轿车走进了千家万户,给人民群众便利出行带来了诸多方便。国产轿车正在崛起,其配置不输合资车,舒适性和安全性充分彰显。譬如,360影像清晰直观,指向性更加明确,可以说是新手的福音;倒车雷达能够显示前后左右的盲区安全距离,让停车随心所欲,信心满满;自动驻车功能在半坡起步中彻底解决了溜车的危险,并释放了拥挤道路情况下的右脚;并线辅助提高了变道行车的安全性;自动大灯解决了出入隧道的安全性,司机只需把注意力放在前方即可。 展开更多
关键词 涡电流效应 汽车轮胎 扎钉 智能报警
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Performance Analysis of RF Spiral Inductor with Gradually Changed Metal Width and Space 被引量:2
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作者 王勇 石艳玲 +5 位作者 刘斌贝 丁艳芳 唐深群 朱骏 陈寿面 赵宇航 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2005年第9期1716-1721,共6页
To decrease the metal losses of RF spiral inductor,a novel layout structure with gradually reduced metal line width and space from outside to inside is presented. This gradual changed inductor has less eddy-current ef... To decrease the metal losses of RF spiral inductor,a novel layout structure with gradually reduced metal line width and space from outside to inside is presented. This gradual changed inductor has less eddy-current effect than the conventional inductor of fixed metal width and space. So the series resistance can be reduced and the quality (Q) factor of the inductor relating to metal losses is increased. The obtained experimental results corroborate the validity of the proposed method. For a 6nH inductor on high-resistivity silicon at 2.46GHz,Q factor of 14.25 is 11.3% higher than the conventional inductor with the same layout size. This inductor can be integrated with radio frequency integrated circuits to gain better performance in RF front end of a wireless communication system. 展开更多
关键词 RF spiral inductor quality factor eddy-current effect metal losses
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Analysis of substrate eddy effects and distribution effects in silicon-based inductor model
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作者 武锐 廖小平 +1 位作者 张志强 杨乐 《Journal of Southeast University(English Edition)》 EI CAS 2009年第1期57-62,共6页
The concepts of substrate eddy influence factor and distribution-effects-occurring frequency are presented. The effects of substrate resistivity and inductor spiral length on the substrate eddy and distribution effect... The concepts of substrate eddy influence factor and distribution-effects-occurring frequency are presented. The effects of substrate resistivity and inductor spiral length on the substrate eddy and distribution effects are captured. The substrate eddy influence factors of an inductor (6 turn, 3 060 μm in length) fabricated on low ( 1 Ω. cm) and high resistivity( 1 000 Ω.cm) silicon substrates are 0. 3 and 0. 04, and the distribution-effects- occurring frequencies are 1.8 GHz and 14. 5 GHz, respectively. The measurement results show that the equivalent circuit model of the inductor on low resistivity silicon must take into consideration substrate eddy effects and distribution effects. However, the circuit model of the inductor on high resistivity silicon cannot take into account the substrate eddy effects and the distribution effects at the frequencies of interest. Its simple model shows agreement with the measurements, and the contrast is within 7%. 展开更多
关键词 planar spiral inductors substrate eddy effects distribution effects equivalent circuit model
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