Journal
2021 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE)
Volume -, Issue -, Pages 5111-5117Publisher
IEEE
DOI: 10.1109/ECCE47101.2021.9595017
Keywords
Electrical machine insulation; end-winding; hybrid Hilbert fractal antenna; partial discharge (PD)
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Funding
- Nigerian Petroleum Training and Development Fund (PTDF)
- Engineering and Physical Research Council EPSRC [EP/S00081X/1]
- European Commission under Clean Sky Programme [101008082]
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This paper presents a novel ring-shaped hybrid fractal antenna for detecting partial discharge in inverter-fed low voltage drives, which can affect the reliability of electrical machines. The antenna has a wide bandwidth and a ring-shape geometry for ideal directivity.
This paper presents the development and application of a novel ring-shaped hybrid fractal antenna to the detection of partial discharge in inverter-fed low voltage drives. Partial discharge is known both as the source and indication of degradation in the winding insulation that is subjected to repetitive impulse voltage with short rise-time (high dv/dt) from PWM-controlled inverters. The partial discharge causes erosion of insulation thin magnet wire which results in premature failure and affects the reliability of low voltage electrical machines. The hybrid fractal antenna presented in this paper exhibits a wide bandwidth which covers the frequency spectrum (similar to 0.3-3GHz)and features a ring-shape geometry which enables it to be embedded within the a machine end-winding and have ideal directivity in all direction across the cross-section.
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