共查询到16条相似文献,搜索用时 140 毫秒
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在脉冲功率领域,许多器件都需要使用磁芯,如脉冲变压器、磁开关、脉冲叠加器、感应加速腔等,磁芯的主要作用之一是增加回路的电感量,因此含磁芯回路电感量的计算是判断该磁芯是否适用于该环境的决定性依据,也是对线路进行准确模拟的前提。磁性材料在不同波形的励磁场下对应着不同的磁导率变化,而线圈的电感量与线圈中磁芯的磁导率成正比,因此,含磁芯线圈的电感在实际使用中必然是一个与励磁过程相关的动态值。 相似文献
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介绍了国产非晶合金应用于感应加速组元的可行性研究的初步结果.采用国产1K101型铁基非晶合金(FeSiB)带材,研制了非晶磁芯,并利用加速腔(或实验腔)对研制的非晶磁芯的磁性能、绝缘性能和稳定性等方面进行了研究.高压单脉冲实验可获得脉冲幅度为240kV、脉冲前沿为17璐(10%-90%)、脉冲平顶为72ns(±1%)的单脉冲;高压猝发三脉冲实验可获得前沿35ns、脉冲平顶60ns的三脉冲,磁芯的有效平均磁密跳变为1.41T.耐压实验研究中,得到了电压幅值为282kV的三脉冲.非晶磁芯的性能稳定,满足感应加速组元对磁芯性能的要求. 相似文献
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国产非晶磁芯应用于感应加速组元的可行性研究 总被引:1,自引:0,他引:1
介绍了国产非晶合金应用于感应加速组元的可行性研究的初步结果. 采用国产1K101型铁基非晶合金(FeSiB)~带材, 研制了非晶磁芯, 并利用加速腔(或实验腔)对研制的非晶磁芯的磁性能、绝缘性能和稳定性等方面进行了研究. 高压单脉冲实验可获得脉冲幅度为240kV、脉冲前沿为17ns(10%—90%)、脉冲平顶为72ns(±1%)的单脉冲; 高压猝发三脉冲实验可获得前沿35ns、脉冲平顶60ns的三脉冲, 磁芯的有效平均磁密跳变为1.41T. 耐压实验研究中, 得到了电压幅值为282kV的三脉冲. 非晶磁芯的性能稳定, 满足感应加速组元对磁芯性能的要求. 相似文献
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提出在典型一阶磁脉冲压缩电路的基础上,测取磁芯在实际工作条件下的动态磁滞回线和饱和磁导率等磁参数,再根据所获得的动态参数指导磁开关设计,进行一阶磁压缩实验。实验选取国内外被广泛应用的非晶磁芯和纳米晶磁芯进行测试,根据实测动态磁参数设计磁开关。实测结果表明:用国产非晶磁芯做磁开关可得到上升沿73 ns、电压幅值28.3 kV、半高宽为503 ns的脉冲,用日本产的纳米晶磁芯做磁开关可得到上升沿30 ns、电压幅值28.4 kV、半高宽为193 ns的脉冲。 相似文献
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通过对带绕非晶态软磁合金磁芯片间绝缘技术的几种方法、磁场热处理技术以及绝缘封装技术的研究,实现了非晶态磁芯片间0.6~1.0μm厚SiO2绝缘涂层以及片间击穿电压不低于120 V直流;非晶态磁芯纵磁热处理剩磁比大于0.90,横磁热处理剩磁比小于0.20,且绝缘封装前后磁芯磁性能变化小于5%。通过对快脉冲条件下带绝缘涂层大尺寸带绕非晶态软磁合金磁芯的研究,测试获得了试验磁芯的脉冲磁导率以及磁通跳变,其中1 000 mm级铁基非晶磁芯在脉冲间隔500 ns、脉冲宽度120 ns三脉冲串条件下,磁通跳变达到了2.86 T。 相似文献
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磁开关是磁脉冲压缩系统的关键部分,磁开关的磁芯性能参数直接影响到磁脉冲压缩系统的总体性能。针对磁脉冲压缩系统中磁开关磁芯应用特性,设计了回路振荡法对磁芯动态磁特性进行测量。通过测量磁开关工作电压和电流参数,计算磁芯的动态磁滞回线,确定饱和磁感应强度、矫顽力等动态参数。基于实验测量参数建立了包含动态磁滞回线的磁脉冲压缩电路模型,研究了磁开关动态特性对电压传递的影响。根据研究结果可得,在磁脉冲压缩系统设计中选择矫顽力较小的磁芯,可降低磁开关的能量损耗,从而保证系统具有较高的电压传递效率。 相似文献
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设计并制作了基于没有附加磁芯复位电路的单级、双级磁脉冲压缩系统电路,用于测试Ni-Zn铁氧体磁芯在μs及亚μs级脉冲激励下的动态磁特性。磁芯的磁滞回线由测量到的磁开关两端电压和电流数据经计算得到,由磁滞回线可知磁芯在μs及亚μs级脉冲激励下的各种特性参数如饱和磁感应强度、剩余磁感应强度、矩形比、磁通密度跳变、矫顽力、饱和磁场强度及单位体积材料磁滞损耗;通过比较两块磁芯在μs及亚μs级脉冲激励下的各种动态磁特性参数可知:两块磁芯随激励脉冲宽度变窄磁芯磁性能有不同程度的下降,亚μs级脉冲激励下的矫顽力和单位体积材料磁滞损耗都比μs级脉冲激励下增大约3倍;饱和磁感应强度小、剩余磁感应强度大的Ni-Zn铁氧体磁芯动态磁特性性能优异,适合用于更窄脉冲的压缩电路中。 相似文献
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《Current Applied Physics》2019,19(8):924-927
The flattening of FeSiAl soft magnetic powder was achieved by ball milling process, and MnZn/FeSiAl composite magnetic powder core was prepared by press molding. The effect of different coating amount of MnZn ferrite on the soft magnetic properties of FeSiAl was studied. At the same time, the optimal stress-relieving annealing temperature of the composite magnetic powder core is revealed. The results showed that the addition of MnZn ferrite affected the magnetic properties such as saturation magnetization (Ms), initial permeability (μi) and power loss (Pcm) of FeSiAl soft magnetic. With the increase of MnZn ferrite addition content, the saturation magnetization of composites decreased gradually, and the magnetic permeability increased first and then decreased, and the loss decreased first and then increased. When the addition content of MnZn ferrite was 5%, the permeability reached the maximum, which was 28.1% higher than that of the pure FeSiAl magnetic powder core under the same conditions. At the same time, the loss was the lowest, which was 13.3% lower than the pure FeSiAl powder core under the same conditions. When the annealing temperature is around 650 °C, the magnetic powder core has the largest magnetic permeability and the lowest loss. 相似文献
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Xiangyue Wang Caowei Lu Feng Guo Zhichao Lu Deren Li Shaoxiong Zhou 《Journal of magnetism and magnetic materials》2012
The Fe–Si–B–P–C metallic glassy alloys exhibit relatively high glass forming ability (GFA) as well as good soft magnetic properties such as ultra-low core loss. In this paper, the metallic glassy alloy (Fe0.76Si0.09B0.10P0.05)98C2 has been newly developed. A new Fe-based amorphous compound powder was prepared from FeSiB amorphous powder by crushing the amorphous ribbons as the first magnetic component and FeSiBPC metallic glassy powder by water atomization as the second magnetic component. Subsequently by adding organic and inorganic binders to the compound powder and cold pressing, the new Fe-based amorphous compound powder cores were fabricated. These new Fe-based amorphous compound powder cores combine the superior DC-bias properties and the excellently low core loss. The core loss of 453 kW/m3 at Bm=0.1 T and f=100 kHz was obtained when the mass ratio of FeSiB/FeSiBPC equals 3:2, and meanwhile the DC-bias properties of the new Fe-based amorphous compound powder cores just increased by 10% at H=100 Oe for μ=60 compared to those of the FeSiBPC powder cores. In addition, with the increase in the content of the FeSiPC metallic glassy powder, the core loss tends to decrease. 相似文献