Measurement of Parasitic Inductances in the Bus-Bar Assembly of a High Power Voltage Source Converter

Datta, Aniket; Narayanan, G.

doi:10.1007/s40031-016-0232-x

Cited by 2 publications

(2 citation statements)

References 12 publications

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“…A simple technique to measure the mutual inductance of the designed PCB coil is presented here. The technique is based on the method presented in [23] to compute the inductance of a DC bus-bar. In the DPT setup shown in Fig.…”

Section: A Mutual Inductancementioning

confidence: 99%

Design of PCB Coil Based High Bandwidth Current Sensor With Power-Loop Stray Inductance Characterization

Rafiq

Pramanick

Maheshwari

2021

IEEE Trans. Ind. Electron.

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Wide bandgap devices enable design of power converters with high power density. However, these power converters require compact printed circuit board (PCB) layouts with low power-loop stray inductance. Consequently, sensing device current in such layouts with minimal intrusion in power-loop remains a challenge. This paper presents a PCB coil based current sensor design featuring power-loop stray inductance characterization. The PCB coil is designed on a double pulse test (DPT) board for current sensing of a discrete TO-247 packaged silicon carbide MOSFET. The design utilizes finite element method (FEM) simulations to determine a suitable position for the PCB coil on the DPT board. The coil placement also results in an increased power-loop stray inductance, which is estimated through FEM simulations. Further, these simulations are used for computation of mutual inductance between the PCB coil and the power-loop traces. Depending on this mutual inductance, a voltage is induced across the terminals of the PCB coil, which is then integrated using an op-amp based integrator circuit. Considering practical opamp limitations, demonstrated with LTspice simulations, various guidelines for sensor design are established in this paper. A sensor prototype is developed based on these guidelines, and experimental results from its evaluation are finally presented.Index Terms-Silicon carbide (SiC), current sensor, high frequency, finite element method (FEM), double pulse test, power converter.

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Section: A Mutual Inductancementioning

confidence: 99%

Design of PCB Coil Based High Bandwidth Current Sensor With Power-Loop Stray Inductance Characterization

Rafiq

Pramanick

Maheshwari

2021

IEEE Trans. Ind. Electron.

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“…Thus, the individual stray inductance of the busbar cannot be filtered away from the stray inductance of the capacitors and the power device. To overcome this [15] suggested calculating the parasitic inductance of a busbar by injecting current into the…”

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confidence: 99%

Determination of Stray Inductance of Low-Inductive Laminated Planar Multiport Busbars Using Vector Synthesis Method

Pickert

et al. 2020

IEEE Trans. Ind. Electron.

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Laminated busbars connect capacitors with switching power modules and they are designed to have low stray inductance to minimize electromagnetic interference. Attempts to accurately measure the stray inductance of these busbars have not been successful. The challenge lies with the capacitors as each of them excite the busbar producing their individual stray inductances. These individual stray inductances cannot be arithmetically averaged to establish the total stray inductance that applies when all the capacitors excite the busbar at the same time. It is also not possible to measure the stray inductance by simultaneous excitation of each capacitor port using impedance analyzers. This paper presents a solution to the above dilemma. A vector synthesis method is proposed whereby the individual stray inductance from each capacitor port is measured using an impedance analyzer. Each stray inductance is then mapped into an x-y-z frame with a distinct direction. This mapping exercise allows the data to be vectored. The total stray inductance is then the sum of all the vectors. The effectiveness of the proposed method is demonstrated on a busbar designed for H-bridge inverters by comparing the simulation and practical results. The absolute error of the total stray inductance between the simulation and the proposed method is 0.48nH. The proposed method improves the accuracy by 14.9% compared to the conventional technique in measuring stray inductances.

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Measurement of Parasitic Inductances in the Bus-Bar Assembly of a High Power Voltage Source Converter

Cited by 2 publications

References 12 publications

Design of PCB Coil Based High Bandwidth Current Sensor With Power-Loop Stray Inductance Characterization

Design of PCB Coil Based High Bandwidth Current Sensor With Power-Loop Stray Inductance Characterization

Determination of Stray Inductance of Low-Inductive Laminated Planar Multiport Busbars Using Vector Synthesis Method

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