Title: | Floating Voltage Sensing Based on Ceramic Capacitor Ferroelectric Derating |
Authors: | Michal, Vratislav |
Citation: | 2022 International Conference on Applied Electronics: Pilsen, 6th – 7th September 2022, Czech Republic, p. 121-124. |
Issue Date: | 2022 |
Publisher: | Fakulta elektrotechnická ZČU |
Document type: | konferenční příspěvek conferenceObject |
URI: | http://hdl.handle.net/11025/49864 |
ISBN: | 978-1-6654-9482-3 |
Keywords: | snížení výkonu kondenzátoru;feroelektrický jev;hystereze kondenzátoru;izolované měření napětí;vícevrstvé keramické kondenzátory |
Keywords in different language: | capacitor derating;ferroelectric effect;capacitor hysteresis;isolated voltage measurement;multilayer ceramic capacitors (MLCC) |
Abstract in different language: | This paper presents methods allowing to provide galvanically isolated DC voltage measurement with nearly infinite input impedance. Measurement is based on a ferroelectric effect, creating hysteretic capacitance vs. bias- voltage (C-V) dependence of the ordinary multilayer ceramic capacitors. Voltage measurement is based on AC impedance sensing of a high-density multilayer ceramic capacitor and comparing with ground-referred matched capacitor with corresponding DC bias voltage. Corresponding DC bias voltage is provided by negative impedance converter and a feedback network. Despite finite accuracy (~1%), voltage sensing performed by a capacitor can be advantageous as it allows to implement AC (high-voltage) coupling, and presents nearly ideal infinite input impedance. This can be beneficial in a variety of applications e.g. in power management systems, energy harvesting applications, or scientific instrumentation. |
Rights: | © IEEE |
Appears in Collections: | Applied Electronics 2022 Applied Electronics 2022 |
Files in This Item:
File | Description | Size | Format | |
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uvod.pdf | Plný text | 1,61 MB | Adobe PDF | View/Open |
Floating_Voltage_Sensing_Based_on_Ceramic_Capacitor_Ferroelectric_Derating.pdf | Plný text | 2,04 MB | Adobe PDF | View/Open |
Please use this identifier to cite or link to this item:
http://hdl.handle.net/11025/49864
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