Evaluation of Overall Accuracy of New Current Sensing Concepts in Comparison to State-of-the-Art Methods
Conference: PCIM Europe 2018 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
06/05/2018 - 06/07/2018 at Nürnberg, Deutschland
Proceedings: PCIM Europe 2018
Pages: 8Language: englishTyp: PDF
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Authors:
Lautner, Frank; Bakran, Mark M. (Chair of Mechatronics, Center of Energy Technology, University of Bayreuth, Germany)
Abstract:
This paper investigates the overall measuring accuracy of conventional current sensors at high motor speeds and compares it with new low cost solutions. State-of-the-art systems are presumed to show high datasheet accuracy but low bandwidth. It was found that a typical bandwidth of 30 kHz depletes the excellent accuracy and causes dynamic errors that exceed stated datasheet values by far. In contrast, new methods like VCE(on)-based measurement with higher bandwidth, while suffering from poorer stationary accuracy, are found to enable comparable overall accuracy but with significant lower costs.