Impact of PWM Voltage Waveforms in High-Speed Drives: A Survey on High-Frequency Motor Models and Partial Discharge Phenomenon

Davide D’Amato, Jelena Loncarski, Vito Giuseppe Monopoli, Francesco Cupertino, Luigi Pio Di Noia and Andrea Del Pizzo
Additional contact information
Davide D’Amato: Department of Electrical and Information Engineering, Politecnico di Bari, Via E. Orabona, 4, 70125 Bari, Italy
Jelena Loncarski: Department of Electrical, Electronic, and Information Engineering “Guglielmo Marconi”, University of Bologna, Via dell’Università 50, 47522 Cesena, Italy
Vito Giuseppe Monopoli: Department of Electrical and Information Engineering, Politecnico di Bari, Via E. Orabona, 4, 70125 Bari, Italy
Francesco Cupertino: Department of Electrical and Information Engineering, Politecnico di Bari, Via E. Orabona, 4, 70125 Bari, Italy
Luigi Pio Di Noia: Department of Electrical Engineering and Information Technology, University of Naples Federico II, Via Claudio, 21, 80125 Napoli, Italy
Andrea Del Pizzo: Department of Electrical Engineering and Information Technology, University of Naples Federico II, Via Claudio, 21, 80125 Napoli, Italy

Energies, 2022, vol. 15, issue 4, 1-30

Abstract: The insulation system’s dielectric of the electric motor is very often subjected to severe electrical stress generated by the high d v / d t seen at the machine’s terminals. The electrical stress and high reflected wave transient overvoltage are even more evident in case of high-speed machines fed by high-frequency (HF) converters featuring very fast wide-bandgap devices. They are promoting the occurrence of partial discharges and consequently accelerate ageing. As this is serious issue and the main cause of the drive failure, it is important to analyse and characterise the surges at the motor terminals. Several HF models of motors have been proposed in the literature for this purpose. This article presents a survey on HF motor models, which is crucial in understanding and studying the most critical parameter identification and overvoltage mitigation techniques. Moreover, it offers a comparison of the models’ main features as well as a comparison with the experimental voltage waveform at motor terminals. A general overview of the partial discharge (PD) phenomenon is also provided, as it is favoured by HF operation and together with HF motor modelling provides key insights to the insulation ageing issue. In particular, an analysis of the effects of PWM waveform affecting insulation is given, as well as useful methods for developing strategies for the inspection and maintenance of winding insulation.

Keywords: HF motor models; partial discharges; accelerated insulation ageing (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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