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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Lautner, Frank; Bakran, Mark M. (Chair of Mechatronics, Center of Energy Technology, University of Bayreuth, Germany)

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.