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    高精度电流传感器

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    我们坚信直流系统将成为未来的发展趋势,而目前,直流领域的高精

    度测量与校准还一片空白。试想一下,5 年、10 年之后,随着能源互联网、电动汽车、储能系统等

    直流新兴产业的发展,高精度直流传感器的市场有多大。磁通门电流传感器,是一种高精度的电流测量与反

    馈元器件,可以将穿过传感器的直流大电流精密的变换成便于测量的小电流。它是一种比霍尔电流传感器

    的极限测量精度高两个数量级的电流测量元器件。国外,瑞士 LEM 公司、丹麦 Danisense 公司和荷兰 PM 公

    司早就推出了成熟的商业化产品,但价格昂贵。国内,2011~2017 年,中国电科院张钟华院士团队基于国家

    重大科学仪器设备开发专项—“宽量限超高精度电流测量仪”,用 6 年时间探索基于自激振荡磁通门技术实

    现直流大电流测量的新方案,取得了突破性进展,填补了国内空白。其团队研制的 600A 精密电流传感器,

    最高测量精度达到十万份之一以内,但其目的为研制实验室标准设备,转化成商业化产品在成本、一致性等

    方面有一定局限性。

    目前,在商业化的应用上,直流大电流的测量主要以霍尔电流传感器及磁通门电流传感器为主。我们选

    择磁通门的技术路线,这主要有两个原因:1、国内生产的霍尔电流传感器的核心部件霍尔芯片及霍尔传感

    器都必须从欧美及日本进口,核心技术被垄断,不适合自主开发;2、而磁通门电流传感器的极限测量精度

    比霍尔电流传感器高两个数量级,具有独特优势。另外,区别于张钟华院士团队国家重大仪器设备专项标准

    制定的路线,我们走高精度、低成本,产品大批量应用的商业化路线。

    目前,市场上一个高精度磁通门电流传感器的价格是普通传感器的20倍,根本无法大规模应用,严重

    制约了高精度产品的使用。另外,目前市场上高精度的电流测试仪表售价为10-100万不等,除了计量院、

    2

    国家科研院所有能力采购外,绝大部分企业根本无力采购,严重制约了企业研发产品的进度及产品性能。

    而航智精密的使命是开发出拥有自主知识产权的高精度、低成本的高精度电流传感器及电流测试仪表,打

    造精密电流测量基准,打破国外垄断,并以此为契机,逐步改变行业现状,让高精度电流传感器及高精度

    电流测试仪得到普及。

    为什么我们能做到呢?这主要基于我们拥有自主知识产权的六大核心关键技术:首先它采用了激磁闭

    环控制技术,与传统方案比省去了复杂的磁屏蔽系统设计。第二,它采用了自激磁通门技术,与传统方案比

    省去了激磁发生器。第三,采用自激退磁技术,零漂小,拓展了量程宽度,原来用两个传感器解决的问题,

    现在只需要一个传感器。第四,采用了多点零磁通技术,通过对激励磁通、直流磁通、交流磁通以及高频磁

    通的零磁通闭环控制,实现了对直流电流、高频电流以及交流电流的精密检测,提高了传感器的电流检测精

    度,降低了传感器的生产成本。第五,采用多级量程自动切换技术,对微伏级弱信号进行精准放大,实现了

    高精度数字化输出,为大数据远程传输提供了必要条件。第六,采用了温控补偿技术,降低传感器的温漂。

    基于多方面的技术集成与创新,我们的产品技术成本优势比较明显,与目前国外世界知名的高精度商用

    电流传感器相比,成本降低了 50%,量程宽度提高了 1 倍,最高测量精度提高了 50%,数字输出为独家所有。

    为了更好地适应市场需求,我们开发了多梯度的技术产品。首先有行业领先的高精度、低成本、交直流

    通用、全量程、低零漂、低温漂的模拟电流传感器;

    在此基础上,我们开发了行业第一款高精度数字电流传感器,它具有三大门槛:第一,高精度;第二,

    低成本;第三,数字化。这每一道门槛都是不容易跨越的,它降低了行业成本,提升了行业效率,增强了用

    户体验。

    基于以上技术集成,我们开发了便携式的高精度、低成本、交直流通用、可实时通讯的电流测试仪和交

    直流测试仪,为高精度仪器仪表的普及应用提供了发展路径。

    根据客户测量电流精度的不同,我们的产品分为计量级、测量级和工控级,根据客户测量电流大小的不

    同分为 5000A、1000A、600A、300A、200A、60A、1A,7 个型号。

    依托强大的技术背景,我们为客户提供高精度电流检测方案定制服务,可以满足特殊尺寸、特殊精度、

    特殊量程、特殊环境的个性化需求。

    因厂家更改商品包装、场地、附配件等不做提前通知,且每位咨询者购买、提问时间等不同。为此,客服给到的回复仅对提问者3天内有效,其他网友仅供参考!给您带来的不变还请谅解,谢谢!

     
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