HallinPower®: Flexible current sensors from milliamperes to several mega-amperes

Magnetic field sensors for non-contact current measurement

Schematische Darstellung eines Chip-Querschnitts und des Feldlinienverlaufs für einen 2-Kanal-Stromsensor — © Fraunhofer IIS
Chip cross-section and field line profile for a 2-channel current sensor

Every electric current generates a magnetic field that can be measured with magnetic field sensors and converted into a current value. In this way, contactless, galvanically isolated current sensors can be developed, which are widely used due to this enormous advantage. There are different approaches to realize a reliable measurement of the current, which are based on different measuring principles depending on the requirements of the application. HallinPower^® technology combines several approaches and enables flexible adaptation to a wide range of measurement requirements, while at the same time ensuring a high level of robustness against interference. By dispensing with magnetizable materials and using integrated sensors, the measuring system can be set up easily and cost-effectively. Thanks to advanced algorithms, even demanding scenarios, such as the detection of several currents simultaneously, can be technically implemented.

At a glance: Technical keyfacts and benefits

Keyfacts	Benefits
Galvanic insulation Robust measuring systems without shielding Insensitive to overload High dynamics, linearity and bandwidth No magnetizable materials DC and AC measurements Manufactured using standard CMOS technology	Simultaneous measurement of several currents Installation during operation Differential measurement Cost-effective production Small size due to system integration Low weight due to elimination of cores

© Fraunhofer IIS
Comparative evaluation of established and modern current measurement methods based on different properties

Our offer: Tailor-made electricity measurement solutions

Our expertise in current measurement encompasses both new and tried-and-tested techniques: one innovative solution is model-based current measurement, which uses mathematical models and advanced algorithms for precise current measurement. This approach is continuously being developed and adapted to current requirements. In addition, we rely on established and robust methods such as the differential field principle, which uses the difference in magnetic fields for precise measurements, and the ring integral principle, which enables us to accurately measure currents by integrating the magnetic field along a path. We offer you support throughout the entire development process. This means:

Feasibility analysis
Development and optimization of the arrangement of magnetic sources and sensors
Elaboration of the signal processing
Realization of the electronics, both discrete and integrated
Development of measurement sequences, e.g. for production tests
Support with component and module qualification
Support during the start of series production and support in the analysis of returns during series production

Applications: Focus on energy efficiency

As the energy transition progresses, the need for sustainable resource utilization continues to grow. Accurate current sensing is essential in automotive systems, industrial equipment, and smart home applications. HallinPower^® technology provides a comprehensive range of flexible solutions designed to address diverse requirements. By leveraging both well-established methodologies and innovative new approaches, it enables the realization of a broad spectrum of applications.

Production Environments

Whether monitoring AC or DC current flows at the machine, or facility level, HallinPower^® enables deployment across every stage of the manufacturing process. Its high degree of flexibility allows current sensing solutions to be integrated quickly and easily, even during ongoing operation. As a result, downtime and production interruptions can be minimized or avoided altogether.

Charging Infrastructure

Thanks to the wide dynamic range of the contactless sensing technology, both low and high currents can be measured with high precision. The robustness of the sensors, combined with advanced signal processing algorithms, enables the realization of highly accurate measurement systems, such as those required for energy metering in electric vehicle charging stations.

High-Current
Measurement

Industrial electrolysis processes, such as those used in aluminum production, involve extremely high currents flowing through the facility. Owing to the inherent overload robustness of Hall sensors, these currents can be measured reliably and accurately.
The flexible integration of multiple sensors enables the precise monitoring of numerous current-carrying components, providing a scalable solution for complex industrial applications.

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