140DAI45300 磁芯電流探頭可以測試直流電和交流電，并且測試直流電和高頻交流電信號的方法不同。霍爾傳感器用于測量直流和低頻交流電，而電流互感器用于測量高頻交流電。交流電在電流互感器的鐵芯中產生磁場，然后電流在第二個繞組電路中汲取并饋入示波器。如下所示：
交直流混合探頭的結構圖如下：
在降額曲線中，只能在低于10K的頻率下測試15Arms的最大連續(xù)電流。
磁芯電流探頭降額功率的主要原因是，當測量高頻和高振幅電流時，探針本身會發(fā)熱。這些熱量甚至可能導致探頭融化并損壞。自熱的主要原因有兩個：
1、高頻電流產生交變磁場。磁場在導體上感應出渦流，頻率越高，渦電流越大，渦流會導致導體發(fā)熱和渦流損耗。
2、在測量高頻電流時，磁芯電流探頭使用變壓器方法進行測量。隨著高頻信號在導體上產生趨膚效應，導體的電阻增加，導體產生熱量，頻率越高，皮膚現(xiàn)象越明顯。
為了避免熱損壞核心流量探頭，在使用時應考慮待測電流的頻率及其諧波分量及其幅度之間的關系。
專業(yè)致力于電力電子變換技術的研發(fā)和應用,專業(yè)生產變頻電源、直流電源、交流負載、直流負載、回饋式電子負載、回饋式電網模擬器、電池模擬器、充電樁測試負載、光伏逆變器測試設備、新
能源電機電控測試電源及自動化測試系統(tǒng)等產品制造及解決方案廠家，是國內電源行業(yè)與測試系統(tǒng)核心技術自動化的高新技術企業(yè)。
140DAI45300
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