Optimization Approaches for the Signal Processing of Hybrid Current Sensors

Ziegler, Philipp; Bura, Michael; Haarer, Jorg; Marx, Philipp; Hirning, David; Roth-Stielow, Jörg

doi:10.23919/ipec-himeji2022-ecce53331.2022.9807001

Cited by 2 publications

(1 citation statement)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A hybrid current sensor combines a magnetic field sensor with another measurement principle with higher bandwidth to overcome the drawback of the limited bandwidth (8) (9) . This allows bandwidths from DC up to seva) Correspondence to: philipp.ziegler@ilea.uni-stuttgart.de * Institute for Power Electronics and Electrical Drives University of Stuttgart Pfaffenwaldring 47, 70569 Stuttgart, Germany This paper was presented at IPEC-Himeji 2022 Conference, for which IEEJ holds the copyright (1) eral hundred MHz. There are approaches to realize these type of current sensors for the control of power electronic circuits (10)∼(12) , commutation current sensors (13)∼(18) , coreless current probes (19) and even fully integrated hybrid current sensors (20) (21) .…”

Section: Introductionmentioning

confidence: 99%

Signal Processing Design for Wide Bandwidth Hybrid Current Sensor based on Enhanced Analog Operational Amplifier Circuit

et al. 2023

View full text Add to dashboard Cite

Hybrid current sensors are suitable for wide bandwidth current measurement. They entail the fusion of two different measurement circuits, one for DC and low-frequency current and another for high-frequency current. Thus, the advantages of the different measurement principles are incorporated in one current sensor. Hybrid current sensors generate output signals through a superposition of the signals from the low-frequency and high-frequency current sensors. This is realized using analog signal processing by means of an analog operational amplifier circuit. Realization of the superposition of the frequency responses of the different measurement circuits to achieve a constant gain in the transition area is challenging. This study focused on the analog signal processing and its enhancement. Specifically, two possible signal processing approaches to increase the bandwidth based on the state-of-the-art realization of a low-pass filter were devised. These approaches were investigated using a simulation model. Frequency response measurements using a hybrid current sensor based on tunneling magnetoresistance sensors and a Rogowski coil were used for verification. The results show that by enhancing the signal processing, the bandwidth of the current sensors can be significantly increased.

show abstract

Section: Introductionmentioning

confidence: 99%