Series Connection of IGBTs With Self-Powering Technique and 3-D Topology

Nguyen, Tan-Tung; Jeannin, Pierre-Olivier; Vagnon, Eric; Frey, David; Crébier, Jean-Christophe

doi:10.1109/tia.2011.2153817

Cited by 32 publications

(6 citation statements)

References 10 publications

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“…An initial compensation Δt c0 can be set to decrease the effect of differences between stray capacitance in main circuit (ΔC ce ) [6] and parasitic capacitance of IGBT (mainly ΔC gc ) [7]. Com- monly, these differences are very small if the system is well designed.…”

Section: B Status Feedback Circuitmentioning

confidence: 99%

“…The voltage sharing in the transient is decided by many factors such as the stray capacitance of main circuit, gate driver parasitic capacitance [6], IGBT parasitic parameters (mainly collector-to-gate capacitance C gc ) [7], and the control signal of gate driver [8]. Among them, the asynchronous gate delay has the largest effect while the consistency of the other parameters can be ensured by the manufacturer.…”

Section: Introductionmentioning

confidence: 99%

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Series-Connected HV-IGBTs Using Active Voltage Balancing Control With Status Feedback Circuit

Lü

Zhao

et al. 2015

IEEE Trans. Power Electron.

101

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Transient voltage unbalance is the major problem that limits the application of series-connected IGBTs in highvoltage and high-power converters. Asynchronous gate delay causes series-connected IGBTs not to turn-on and turn-off at the same time resulting in severely unbalanced voltage sharing. An active voltage balancing control technique is proposed in this paper to solve the asynchronous gate delay problem. By sampling the feedback signal caused by unbalanced voltage sharing, the microcontroller generates a time delay for the gate driver to compensate the asynchronous gate delay. The most vital part of active voltage balancing control, the status feedback circuit, is also discussed in detail in this paper. The function of the status feedback circuit and the effect of active voltage balancing control are verified in a two series-connected HV-IGBTs platform in rated operation (5 kV bus voltage and 600 A load current).

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Section: B Status Feedback Circuitmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Series-Connected HV-IGBTs Using Active Voltage Balancing Control With Status Feedback Circuit

Lü

Zhao

et al. 2015

IEEE Trans. Power Electron.

101

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“…The voltage unbalance is mainly due to device's parameters spread, gatedrive delay time jitter and parasitic elements, especially the one between each series connection potential and ground or reference potential [9]- [12]. Passive snubber circuits [13]- [17], active voltage clamping [18], [19], active gate control [12], [20]- [23] and natural self-voltage balancing techniques [10], [11], [24], [25], are used to improve the voltage sharing performance.…”

Section: Introductionmentioning

confidence: 99%

A Cascaded Gate Driver Architecture to Increase the Switching Speed of Power Devices in Series Connection

Alves

Nguyen

Lefranc

et al. 2021

IEEE J. Emerg. Sel. Topics Power Electron.

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This paper presents a novel packaging technique to improve the voltage sharing performances of series-connected SiC-MOSFETs. The proposed method takes advantage of the parasitic capacitance network introduced by the packaging dielectric isolation layers in order to reduce the voltage unbalancing across the series-connected devices. In a first step, the study carried out in this work explains how the parasitic capacitance networks introduced by the classic planar packaging and the gate drive circuits unbalance the voltages across the devices. Therefore, a new packaging concept is proposed in order to compensate the effects of the gate driver parasitic capacitances. The concept is introduced and analyzed thanks to equivalent models and time domain simulations. To verify the analysis, the voltage sharing between two series-connected 1.2 kV SiC-MOSFETs is tested in a pulse test setup. The experimental results confirm that the proposed voltage balancing technique can drastically improve the voltage sharing performance.

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“…There are several methods to minimize the voltage difference across individual IGBT in the series string [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…A resistor network in parrallel with each series-connected IGBT is used for static voltage balancing , and a resistor-capacitor or a resitor-capacitordiode circuit in parallel with each IGBT used for dynamic voltage sharing. The use of a resistor network increases static power losses during static phases; the use of large snubber circuits minimizes voltage unbalance during dynamic phases but increases the transient power losses due to the increased commutation time [9][10]. These components are large in size and very costly.…”

Section: Introductionmentioning

confidence: 99%

Physical Investigation Into Effective Voltage Balancing by Temporary Clamp Technique for the Series Connection of IGBTs

Yang

Zhang

He³

et al. 2018

IEEE Trans. Power Electron.

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The series connection of IGBTs is essential for high voltage applications where fast switching performances need to be maintained. However, unbalanced voltage sharing is a major resistance to the converter application of this structure. There are a number of causes leading to voltage unbalance, such as different signal delays, parasitic parameters, and tail currents and so on. A temporary clamp scheme performed by Active Voltage Control (AVC) has been proven to be effective in solving the unbalanced voltage-sharing issue. However, the basic physics has not been investigated. In this paper, the physical principle of voltage unbalance within IGBTs series operation is discussed. The carrier storage region differences are concluded to be the intrinsic cause of unbalanced voltage sharing. By using an accurate Fourier-series-based IGBT simulation model with appropriate assumptions, a physical explanation for temporary clamp is provided in detail. At the end of the tail current period when the excess carrier concentration becomes close to the intrinsic doping density, the temporary clamp is able to achieve satisfactory equal voltage sharing.

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Series Connection of IGBTs With Self-Powering Technique and 3-D Topology

Cited by 32 publications

References 10 publications

Series-Connected HV-IGBTs Using Active Voltage Balancing Control With Status Feedback Circuit

Series-Connected HV-IGBTs Using Active Voltage Balancing Control With Status Feedback Circuit

A Cascaded Gate Driver Architecture to Increase the Switching Speed of Power Devices in Series Connection

Physical Investigation Into Effective Voltage Balancing by Temporary Clamp Technique for the Series Connection of IGBTs

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