Extraction of Common-Mode Impedance of an Induction Motor by Using All-Phase FFT With Intermediate-Frequency Filtering

Chen, Henglin; Ye, Shize; Wang, Tao; Zheng, Xiaoyan; Li, Tianze

doi:10.1109/temc.2021.3050457

Cited by 4 publications

(3 citation statements)

References 13 publications

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“…It can occupy a small amount of resources to get accurate results. It is very suitable for a lightweight piano performance evaluation system [8]. In the system proposed by Zhang, the system based on non-negative matrix decomposition is used in piano teaching [9].…”

Section: Literature Reviewmentioning

confidence: 99%

Design of the Violin Performance Evaluation System Based on Mobile Terminal Technology

Lin

2022

Mathematical Problems in Engineering

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In order to solve the problem that violin performance evaluation is too subjective, this paper proposes a violin performance evaluation system based on mobile terminal technology. Violin sound evaluation mainly includes two indicators such as pronunciation quality and distance transmission ability. LabVIEW 8.2 is used to collect data, and fast Fourier transform (FFT) is used to analyze the time-domain signal in frequency domain, and the pronunciation process of violin is discussed in depth. Using statistical methods to process the test data of pronunciation distance transmission, a parameter model representing the pronunciation distance transmission ability is proposed, and finally the WeChat applet is used to control the recording and display. The results show that the process of violin sound production is accompanied by the weakening of octave peaks and the development of overtone peaks. The stable stage is marked by the stability of each octave peak and overtone peak. The sound head initially presents a simple excitation response, with only one near octave overtone and three cycles. Its maximum overtone peak/dominant frequency peak ratio coefficient is k = 0.36; the back entry complex excitation response has about nine cycles, with k = 0.735. Then enter the quasi-stable excitation response, whose waveform is similar to the typical A-string empty string pull waveform in the later stage, with k = 0.36; the maximum overtone peak/main frequency peak proportional coefficient is k = 0.39 in the rising section of the start, k = 0.2 in the loudest section, and k = 0.26 in the stable section. Conclusion. The system has initially established a new instrumented evaluation method, which provides a way of thinking for improving the quantifiable evaluation system in the future.

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Section: Literature Reviewmentioning

confidence: 99%

Design of the Violin Performance Evaluation System Based on Mobile Terminal Technology

Lin

2022

Mathematical Problems in Engineering

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“…For this purpose, suitable experimental procedures/setups were required for measuring the in-circuit impedance with the converter switched ON. The reader can refer to some studies on inductive coupling [54] , capacitive coupling [55] and VI methods [56] . To investigate the effects of the LTI assumption, the black-box model of the boost converter shown in Fig.…”

Section: Lti Assumptionmentioning

confidence: 99%

Black-box Modeling of Converters in Renewable Energy Systems for EMC Assessment: Overview and Discussion of Available Models

Beshir

Liu

et al. 2022

Chin. J. Electr. Eng.

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The development of renewable energy systems interfaced with the grid by power electronic converters leads to increasing issues of electromagnetic coexistence between power and communication lines, as well as severe power quality issues, such as total harmonic distortion at the consumer side. Therefore, high-frequency modeling of renewable energy systems is of great importance to guide the design and development of distribution networks involving renewable sources. Owing to system complexity, black-box modeling approaches offer more advantages than traditional circuit modeling, as far as electromagnetic compatibility (EMC) analysis and filter design are the targets. In this study, different black-box modeling techniques for power converters are introduced and systematically analyzed. First, the general theory of black-box modeling is explained. Subsequently, three different modeling approaches are compared in terms of accuracy and the required experimental setup. Finally, the possible limitations of black-box modeling of power converters are investigated and discussed.

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“…These issues can compromise the motors' reliability and lifespan [9][10][11]. Addressing these problems often requires access to motor impedance information, typically ranging from a few hundred Hz to several tens of MHz [12][13][14]. Acronyms †: SP (Single-phase), PG (Phase-to-ground), CM (Common-mode), DM (Differential-mode), Mag (Magnitude), and Pha (Phase).…”

Section: Introductionmentioning

confidence: 99%

Enhancing motor impedance measurements: broadening the spectrum from low to high frequencies

Jie,

See,

Chang

et al. 2024

Meas. Sci. Technol.

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Three-phase induction motors serve as critical parts in various industrial applications, lauded for their high energy efficiency and notable power density. Obtaining their broadband impedance information is paramount for analyzing conducted emissions, evaluating overvoltage ringing, and assessing motor health status. Nonetheless, conventional methods for motor impedance measurements typically rely on Kelvin clip leads or extension cables, which are effective only in a relatively low-frequency region (i.e., below 1 MHz). This paper presents an improved approach to extend the measurable spectrum from low to high frequencies, up to 120 MHz. The proposed method develops a series of fixture adapters to enable seamless interconnection between the terminals of an induction motor and the coaxial ports of an impedance analyzer. The parasitics introduced by these adapters are identified using boundary-element analysis, and their impacts are minimized based on the de-embedding concept. Experimental results affirm the accuracy and effectiveness of the proposed method for four types of motor impedances (i.e., single-phase, phase-to-ground, common-mode, and differential-mode) across a broad frequency range from 100 Hz to 120 MHz. Moreover, the inaccuracy of motor impedance measurements at high frequencies (i.e., above 1 MHz) using conventional methods, including Kelvin clip leads and extension cables, is also demonstrated.

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Extraction of Common-Mode Impedance of an Induction Motor by Using All-Phase FFT With Intermediate-Frequency Filtering

Cited by 4 publications

References 13 publications

Design of the Violin Performance Evaluation System Based on Mobile Terminal Technology

Design of the Violin Performance Evaluation System Based on Mobile Terminal Technology

Black-box Modeling of Converters in Renewable Energy Systems for EMC Assessment: Overview and Discussion of Available Models

Enhancing motor impedance measurements: broadening the spectrum from low to high frequencies

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