Line Impedance Measuring Instrumentation Utilizing Current Probe Coupling

Southwick, Roger A.; Dolle, Walter C.

doi:10.1109/temc.1971.303150

Cited by 43 publications

(23 citation statements)

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“…operating small ac motor, fluorescent light, etc., within frequency range from 20 kHz to 30 MHz by [15]. Then, the power line impedance was measured within frequency range from 10 kHz to 32 MHz by [16] and 20 kHz to 30 MHz [17]. Later, the frequency range of power line impedance measurement is extended up to 500 MHz [18].…”

Section: Theory Of the Direct Clamping Two-probe Measurementmentioning

confidence: 99%

EMI filter design: Part II: Measurement of noise source impedances

Tarateeraseth

2012

IEEE Electromagn. Compat. Mag.

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Section: Theory Of the Direct Clamping Two-probe Measurementmentioning

confidence: 99%

EMI filter design: Part II: Measurement of noise source impedances

Tarateeraseth

2012

IEEE Electromagn. Compat. Mag.

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“…Most of the methods for in-circuit impedance measurement are usually intended for very specific applications [1]- [3]. More general in-circuit impedance measurement methods have also been developed based on the inductive coupling technique [4]- [6]. The inductive coupling method which uses two clamp-on type current probes, one as injecting probe and another as receiving probe, has been applied to extract in-circuit noise source impedance for the purposes of electromagnetic interference filter design [7]- [9] and impedance characterization of in-circuit ferrite-core inductor [10].…”

Section: Introductionmentioning

confidence: 99%

Inductive Coupled In-Circuit Impedance Monitoring of Electrical System Using Two-Port <italic>ABCD</italic> Network Approach

See

2015

IEEE Trans. Instrum. Meas.

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By treating the inductive coupling probes and the electrical system to be monitored as three cascaded two-port ABCD networks, the in-circuit impedance of the electrical system can be extracted with ease. The proposed method simplifies the setup calibration and allows real-time impedance monitoring of critical electrical system to be implemented without interrupting its normal operating conditions. In this paper, the theory behind the proposed ABCD networks approach is described. The proposed approach has overcome the poor measurement accuracy of the conventional inductive coupling calibration method above 30 MHz and has achieved good accuracy up to 100 MHz with a maximum measurement deviation of 3.6%. Finally, using a dc-powered motor as a practical example, the ability to detect the change of in-circuit impedance of the motor under different operating conditions is demonstrated.

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“…Nicholson and Malack [20] conducted the impedance measurement of ac mains outlets in the United States using the two-current-probe method in the frequency range from 20 kHz to 30 MHz. This measurement technique was also studied by Southwick and Dolle [21]. The measurement made in the United States was later compared with the similar measurement performed in Europe [36].…”

Section: Introductionmentioning

confidence: 99%

In-circuit RF impedance measurement for EMI filter design in switched mode power supplies

Deng¹

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Two supposedly identical power line filter elements from two different manufacturers may perform differently in the same design application. In the case of filter chokes, no information about the operating current at which the inductors, both common core and independent core, will saturate, has been given. Hence, two supposedly identical filter chokes may perform very differently, depending of the core material used.

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Line Impedance Measuring Instrumentation Utilizing Current Probe Coupling

Cited by 43 publications

References 0 publications

EMI filter design: Part II: Measurement of noise source impedances

EMI filter design: Part II: Measurement of noise source impedances

Inductive Coupled In-Circuit Impedance Monitoring of Electrical System Using Two-Port <italic>ABCD</italic> Network Approach

In-circuit RF impedance measurement for EMI filter design in switched mode power supplies

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