全新FMx分流器系列：小分装 低阻电阻

Isabellenhütte introduces a new range of 1-to-6 mOhm precision resistors

Isabellenhütte带来最新1-6mOhm的精密功率电阻。

Isabellenhütte has developed a new range of precision resistors in standard sizes with resistances ranging from 1 to 6 mOhm for applications which require small and low-ohmic shunts. In terms of their construction, the components are also less complex than the current ISA-PLAN® resistance families. And yet, they offer the same performance quality: very good long-term stability, alow temperature coefficient, and low thermo electric voltages.

Isabellenhütte研发了一系列标准规格，阻值范围在1-6mOhm之间的小分装低电阻的精密分流器。在其构造方面，该元器件比ISA-PLAN®系列简单一些。但其性能却保持一致：长期稳定性，低温漂，以及低电热电压。

Image caption: An FMx shunt under construction: The resistance material, e.g. NOVENTIN®, is made of a robust full metal plate whichis directly soldered with its underside. Very low-ohmic resistances are achievable thanks to the large cross-sectional areas. Image: ©Isabellenhütte Heusler GmbH & Co. KG

FMx分流器电阻材料的构造：NOVENTIN®是由坚固的全金属板制成，底板可以直接焊接。横截面积大，实现超低电阻阻值。

With the FMx shunt family, Isabellenhütte has now plugged a gap in the standard size range for precision resistances. It has not been possible with the previous product ranges to realize the usual S(2512), P (2010) and K (1206) standard sizes in the resistance range from 5 to1 mOhm. The impetus for this new development was provided by increasing demand for these resistances as well from a wide range of industries, including the automotive sector (for in-car chargers and assistance systems) and industry (for BLDC drive units), but also from the consumer market (e.g. for white goods).

如今随着FMx分流器系列的诞生，Isabellenhütte填补了标准规格精密电阻的一个空白。因为过去的系列无法同时满足2512，2010，以及1206这些尺寸1-5mOhm标准规格的电阻产品。由于各类行业的广泛应用范围促成此类全新电阻的研发，包括汽车行业（车载充电和辅助系统），工业行业（BLDC无刷直流电机传动装置），以及消费市场（大型家用电器）。

The development approach

研发过程

The large cross-sectional areas required for low-ohmic components have been achieved by achange in construction, and the production process has also been significantly simplified. A further milestone for the FMx shunts has been the development of the NOVENTIN® resistance alloy to make it possible to realize these low-ohmic values in defined sizes. Until now, the ISA-PLAN® resistances (SMx, VMx and CMx) have followed a sandwich construction, consisting of a substrate – usually copper – an adhesive and a resistance film made out of the ZERANIN® and MANGANIN® resistance alloys developed in-house by Isabellenhütte. The FM in the title of the new range stands for “Full Metal”, i.e. the components are fashioned in the corresponding thickness out of a full metal plate made of the resistance material in question and directly soldered onto the underside. These variant is very low-ohmic due to the large cross-sectional areas. 1 mOhm is realized with the ZERANIN® alloy, 2 mOhm with MANGANIN®, and, for the first time, NOVENTIN® is being used in ISA-PLAN® products for the resistance range from 3 to 6 mOhm. The new design has given rise to a particularly robust construction which also makes it possible to leave out some work stages and reduce costs. An important point for the automotive industry is this: The components form a soldering point meniscus to guarantee the possibility of automated inspection of the soldering points.

通过改变结构实现了低阻电阻元器件所需的大横截面积，并且生产过程也得到了显著简化。FMx分流器的另一个显著里程碑是开发了NOVENTIN®电阻合金，使其能够以规定的尺寸实现低阻值电阻。到目前为止，ISA-PLAN®系列电阻（SMx，VMx和CMx）采用夹层结构，由基层（通常是铜），粘合剂以及由Isabellenhütte自产的ZERANIN®和MANGANIN®电阻合金电阻膜制成。全新系列的标题FM代表“全金属”—“Full Metal”，元器件由相应厚度的金属板直接构成电阻体材料，并焊接在底面。由于横截面积大，所以阻值非常低。用ZERANIN®合金来实现1mOhm，MANGANIN®合金来实现2mOhm，现今第一次使用NOVENTIN®合金用于3-6mOhm阻值范围的ISA-PLAN®产品。新设计的坚固结构能够省去部分工作阶段并降低成本。汽车行业特别需要注意的一点是：元器件组成一个凹凸面的焊接点，以确保自动检测焊接点的可行性。

Less complex with the same quality parameters

质量参数一致，复杂性降低

Despite the reduction in complexity, the FMx range still offers the same high performance quality as the existing high-ohmic product family. This is ensured by the high-class, massive resistance material, the very good long-term stability, alow temperature coefficient and low thermoelectric voltages. These aspects give rise to good measurement resistance.

尽管复杂性降低，但是通过高质量，大量电阻材料，优良的长期稳定性，低温漂以及低热点电压来确保FMx系列能够提供与高阻值产品系列相同的高性能质量。以上几方面使得我们的采样电阻表现特别优异。