Estimation of High-Frequency Parameters of AC Machine From Transmission Line Model

Ryu, Younggon; Park, Bo-Ryang; Han, Ki Jin

doi:10.1109/tmag.2014.2355718

Cited by 26 publications

(12 citation statements)

References 5 publications

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“…Another model has been proposed in [84] with improved accuracy, but it still needs further research to fully distinguish the groundwall and interturn insulation ageing. The transmission line model considers the stator winding as a uniform transmission line [85], but being the interturn that ages a non-uniform process, it is hard to represent it properly.…”

Section: Selection Of the Hf Motor Modelmentioning

confidence: 99%

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

et al. 2022

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The insulation system’s dielectric of the electric motor is very often subjected to severe electrical stress generated by the high dv/dt 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.

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Section: Selection Of the Hf Motor Modelmentioning

confidence: 99%

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

et al. 2022

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“…( 2) can give rise to several possible solutions, and physically reasonable values are selected based on the criterion described in Ref. [28]. The next step is to extract the PUL RLGC parameters presented in Fig.…”

Section: Transmission Line Modelmentioning

confidence: 99%

“…To facilitate this study, a transmission line model of the induction motor is adopted so that the motor DM impedance under different stator winding faults can be easily determined. In general, there are two types of electrical models for an induction motor: the lumped circuit model [21][22][23][24] and transmission line model [25][26][27][28] . The lumped circuit model is commonly used to estimate the motor drive overvoltage and EMI noise emission; however, it fails to provide detailed electrical information of each turn of the stator winding [29] .…”

Section: Introductionmentioning

confidence: 99%

Impact of Motor Stator Winding Faults on Motor Differential-mode Impedance and Mode Transformation

Fan

Jie

Sun

et al. 2022

Chin. J. Electr. Eng.

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Motor impedance and mode transformation have significant effects on the electromagnetic interference (EMI) generated in motor drive systems. Stator winding faults commonly cause motor failure; however, in their early stages, they may not affect the short-term operation of the motor. To date, EMI noise under the influence of premature stator winding faults has not been adequately studied, particularly the differential-mode (DM) noise due to the common-mode (CM)-to-DM transformation. This study investigates and quantifies the influence of stator winding faults on the motor DM impedance and mode transformation. First, the transmission line model of an induction motor is described based on the scattering (S) parameter measurements of each phase of the motor. It offers the flexibility to emulate different types of stator winding faults at specific locations and various severities, such that the impacts of the faults on the motor DM impedance can be easily estimated. Second, a test setup is proposed to quantify the CM-to-DM transformation due to the stator winding faults. The findings of this study reveal that even the early stages of stator winding faults can result in significant changes in the DM noise.

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“…These impedances are usually measured using an impedance analyzer on a motor in several connection schemes (typically in common and differential modes). The circuit parameters can then be extracted from the measurements using either pre-defined equivalent circuit topologies that emulate the physical behavior of the motors [29,93,95,102,121,[127][128][129][130][131][132][133][134] or more general circuit topologies based on rational function approximations [135,136] and vector fitting algorithm [17,19,137,138]. A combination of FEM and behavioral modeling may also be used to improve and fine-tune the model parameters [139].…”

Section: Motor Modelingmentioning

confidence: 99%

EMC Component Modeling and System-Level Simulations of Power Converters: AC Motor Drives

et al. 2021

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EMC simulations are an indispensable tool to analyze EMC noise propagation in power converters and to assess the best filtering options. In this paper, we first show how to set up EMC simulations of power converters and then we demonstrate their use on the example of an industrial AC motor drive. Broadband models of key power converter components are reviewed and combined into a circuit model of the complete power converter setup enabling detailed EMC analysis. The approach is demonstrated by analyzing the conducted noise emissions of a 75 kW power converter driving a 45 kW motor. Based on the simulations, the critical impedances, the dominant noise propagation, and the most efficient filter component and location within the system are identified. For the analyzed system, maxima of EMC noise are caused by resonances of the long motor cable and can be accurately predicted as functions of type, length, and layout of the motor cable. The common-mode noise at the LISN is shown to have a dominant contribution caused by magnetic coupling between the noisy motor side and the AC input side of the drive. All the predictions are validated by measurements and highlight the benefit of simulation-based EMC analysis and filter design.

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Estimation of High-Frequency Parameters of AC Machine From Transmission Line Model

Cited by 26 publications

References 5 publications

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

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

Impact of Motor Stator Winding Faults on Motor Differential-mode Impedance and Mode Transformation

EMC Component Modeling and System-Level Simulations of Power Converters: AC Motor Drives

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