Time-Variant In-Circuit Impedance Monitoring Based on the Inductive Coupling Method

See, Kye Yak; Chua, Eng-Kee; Narayanan, Arun Shankar; Chen, Wayne; Weerasinghe, Arjuna

doi:10.1109/tim.2018.2838198

Cited by 34 publications

(12 citation statements)

References 14 publications

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“…To perform time-variant in-circuit impedance measurement, the TD-TPS was developed. The TD-TPS was first for time-variant in-circuit impedance monitoring of switching circuits [14]. It was later employed for voltage-dependent capacitances extraction of power semiconductor devices [8] and stator insulation faults detection of induction motors [17].…”

Section: Time-domain Two-probe Setupmentioning

confidence: 99%

“…To measure the in-circuit impedance of one SUT, the measurement setups of the inductive coupling approach can be mainly divided into the frequency-domain two-probe setup (FD-TPS) [9]- [13], the time-domain two-probe setup (TD-TPS) [14]- [17] and the frequency-domain single-probe setup (FD-SPS) [18]- [20]. Besides, the multi-probe setup (MPS) was also designed but it is for simultaneous measurement of in-circuit impedances of multiple SUTs in multi-branches powered by the same power source [21], [22].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

In-Circuit Impedance Measurement Setups of Inductive Coupling Approach: A Review

Fan¹,

Jie²,

Yang³

et al. 2022

Preprint

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In-circuit impedance measurement provides useful information for many EMC applications. The inductive coupling approach is a promising in-circuit impedance measurement method due to its non-contact characteristics and simple on-site implementation. Many measurement setups of this approach were reported. However, a comprehensive survey and comparison of these setups have not been found in the literature. This paper reviews these setups in terms of their characteristics, limitations, and applications. In addition, recommendations for future research are also presented.

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Section: Time-domain Two-probe Setupmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

In-Circuit Impedance Measurement Setups of Inductive Coupling Approach: A Review

Fan¹,

Jie²,

Yang³

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…Hence the DFT can be used to monitor Zloop in real time [7]. Once V1 and V2 are obtained, Zloop can be obtained through the equation stated above.…”

Section: Figure 3 -Moving Window Discrete Fourier Transform Algorithmmentioning

confidence: 99%

“…For this paper, a non-intrusive impedance extraction online method that is based on the inductive coupling approach [4][5][6][7], is used for detecting insulation fault within the stator winding of the induction motor. A known signal generated is input into the induction motor and monitored simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Motor Stator Winding Condition Monitoring

Joey¹

2021

Preprint

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The induction motor is considered the workhorse of the industry as it is used in most of the engineering applications. It is essential to ensure a safe and reliable operation of the induction motor in every system. Among the various types of induction motor faults, stator winding insulation fault accounts for a high percentage of it. As such, being able to detect early stages of insulation faults within the equipment using the method proposed in this paper would prove to be useful in providing timely maintenance. The proposed method in this paper is the non-intrusive impedance extraction method for online stator winding fault detection of induction motor. By observing the health condition of the motor in relation with its impedance, early stages of faults can be detected and rectified. Hence, eliminating potential safety hazards, reducing motor downtime as well as lowering the cost of maintenance. Experimental results shown will prove the reliability and accuracy in which the method proposed would provide. At the same time, its installation and removal are less complicated as compared to other methods hence is cost and time efficient.

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“…The voltage of the test signal at the input terminal and voltage of the feedback signal at the output terminal of the IIP is then being processed by channel 0 (CH0) and channel 1 (CH1) of the signal acquisition card (SAC) within the SGAS, respectively. The impedance contributed by the source voltage and electrical wirings excluding the sections that are being clamped by the probes of the measurement setup is denoted as ZS and ZW respectively, as shown in Figure8[25]. The equivalent impedance measured by the two probes can be represented by ZX, where 𝒁 𝑿 = 𝒁 𝑺 + 𝒁 𝑾 + 𝒁 𝑫𝑼𝑻(7)…”

mentioning

confidence: 99%

Two-Probe Setup with Improved Calibration for Online Impedance Measurement of Electrical Assets

Chou¹

2021

Preprint

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The online impedance serves as one of the most crucial specification to evaluate the health status and efficiency of an electrical device or system. The inductive coupling technique is a preferred approach to measure the online impedance due to the ease of implementation of the circuit which has zero physical contact to the live electrical system. The existing inductive coupling method deployed to measure the online impedance of an electrical device under test (DUT) adopts two probes in total: an injecting inductive probe (IIP) and a receiving inductive probe (RIP). An open/short/load (OSL) calibration procedure is implemented to eradicate the ramifications of the probe-to-probe coupling, however, based on the assumption that the calibration criterions (shorted, open and 50Ω) are approximated to their theoretical values in a specified frequency range. Hence, any measurement with frequency outside the specified range (i.e. larger than 1 MHz) will not be accurate due to the frequency-dependent residual inductances and capacitances of the calibration model. To overcome the aforesaid limitation, this paper introduces an improved calibration procedure which is applicable for a wider frequency range which takes the frequency-dependent characteristics into consideration. With the two-probe measurement setup (TPMS), the adopted improved calibration procedure is introduced to eradicate the ramifications of the probe-to-probe coupling with the intention to refine the accuracy of the extracted online impedance.<a></a>

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Time-Variant In-Circuit Impedance Monitoring Based on the Inductive Coupling Method

Cited by 34 publications

References 14 publications

In-Circuit Impedance Measurement Setups of Inductive Coupling Approach: A Review

In-Circuit Impedance Measurement Setups of Inductive Coupling Approach: A Review

Motor Stator Winding Condition Monitoring

Two-Probe Setup with Improved Calibration for Online Impedance Measurement of Electrical Assets

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