On &lt;inline-formula&gt;
                     &lt;tex-math notation="LaTeX"&gt;$V_{{\text{ce}}}$&lt;/tex-math&gt;
                  &lt;/inline-formula&gt; Method: &lt;italic&gt;In Situ&lt;/italic&gt; Temperature Estimation and Aging Detection of High-Current IGBT Modules Used in Magnet Power Supplies for Particle Accelerators

Asimakopoulos, Panagiotis; Papastergiou, Konstantinos; Thiringer, Torbjörn; Bongiorno, Massimo; Godec, G. Le

doi:10.1109/tie.2018.2823689

Cited by 28 publications

(9 citation statements)

References 21 publications

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“…Considering the constraints mentioned in the introduction, the magnets are normally supplied by an H-bridge with an electrolytic capacitor bank as energy storage [4]. The converter is such that often one converter is sufficient, perhaps combining 2 or 4 in series, parallel or series-parallel combination to achieve the required outputs, depending on the specific magnet.…”

Section: The Modular Power Convertermentioning

confidence: 99%

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High precision scalable power converter for accelerator magnets

Haugen¹,

Papastergiou²,

Asimakopoulos³

et al. 2022

J. Inst.

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The lower conduction power losses and the positive temperature coefficient that favours parallel connections, make Silicon Carbide (SiC) Metal Oxide Semiconductor Field-Effect Transistors (MOSFETs) to be an excellent replacement of existing Silicon Insulated Gate Bipolar Transistors (IGBTs) technology. These characteristics combined with high switching frequency operation, enables the design of high-accuracy DC-DC converters with minimised filtering requirements. This paper investigates the design for a converter with high-accuracy current (0.9 ppm) supplying a 0.05 H electromagnetic load, aiming to achieve the accuracy without the use of active filters, by using SiC MOSFETs and a scalable module-based converter design.

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Section: The Modular Power Convertermentioning

confidence: 99%

“…The current these power converters are designed to supply, will often be a series of trapezoid current pulses. These are supplied by power converters with built in energy recovery to reduce the overall energy consumption of the experiments [3,4]. An example of such a current train is shown in figure 1(a).…”

Section: Introductionmentioning

confidence: 99%

High precision scalable power converter for accelerator magnets

Haugen¹,

Papastergiou²,

Asimakopoulos³

et al. 2022

J. Inst.

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“…Bond wires falling is the final degradation form of the IGBT module. Once a bond wire falls, other bond wires will bear more shear stress, causing the degradation process to accelerate [ 12 , 13 , 14 ]. The variations in bond resistance and gate capacitance lead to an increase in emitter saturation voltage, on-state loss, and junction temperature [ 13 , 14 , 15 , 16 ], affecting the thermal safety of the module.…”

Section: Introductionmentioning

confidence: 99%

Online Recognition of Fallen-Off Bond Wires in IGBT Modules

Hu,

Cui,

Shi

2024

Micromachines

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As a core component of power conversion systems, insulated gate bipolar transistor (IGBT) modules continually suffer from severe thermal damage caused by temperature swings and shear stress, resulting in fatigue failure. Bond wires falling off is one of the failure modes of IGBT modules. Given that the number of fallen-off bond wires is a significant parameter to evaluate the health status of the IGBT modules, this paper proposes an online identification model to recognize the number of fallen-off bond wires during normal operation. Firstly, a database containing datum Vce,on−Tj−IC (collector–emitter on-state voltage Vce,on, chip junction temperature Tj, collector current IC) planes with different fallen-off bond wires is built based on an offline aging test. Secondly, a Foster network model and a special circuit are designed to measure the junction temperature Tj and the collector–emitter on-state voltage Vce,on, respectively. Thirdly, the feature points of the IGBT module represented by Vce,on, Tj, and IC are given to the database to recognize the number of fallen-off bond wires according to the position of the feature points in the datum plane. The experimental results show that the proposed method can determine the fallen-off bond wires under the operation condition.

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“…More specifically, DC/DC converters are used for the precise regulation of the current supplying electromagnets in highenergy physics experiments [21,22]. These electromagnets are operated in a repetitive manner [20], which results in a cycling power flow, shown in Figure 1 and this leads to technical challenges that have been discussed in [23]. In certain applications the load mission profile is unknown [24], while at CERN, the European Organisation for Nuclear Research, the powering requirements of electromagnets are often well defined, and the designer can take this into account for optimising electrical and thermal performance of the converters.…”

Section: Introductionmentioning

confidence: 99%

Power flow control in a modular converter with energy storage

Haugen,

Papastergiou,

Peftitsis

2023

IET Power Electronics

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Using modularized power converters with scalable energy storage in particle accelerators can be further enhanced with controls that can be adapted to optimise different design targets, such as to minimise the front‐end stage peak current, the depth of discharge of electrolytic capacitors or the thermal cycling of semiconductors. This paper proposes a control system that is able to individually adjust the power flow of the converter modules under pre‐defined load profiles, and hence separates the use of energy storage and grid connection even under rapid cycling. The paper briefly summarises the characteristics of the modular converter and proposes four energy control strategies that have been validated by simulation as well as experimentally on a 800 kW full scale prototype. It is shown that by applying each strategy, the corresponding design objectives can be achieved, for example, optimal utilisation of the energy storage systems or minimised current stress in the semiconductors.

show abstract

On <inline-formula> <tex-math notation="LaTeX">$V_{{\text{ce}}}$</tex-math> </inline-formula> Method: <italic>In Situ</italic> Temperature Estimation and Aging Detection of High-Current IGBT Modules Used in Magnet Power Supplies for Particle Accelerators

Cited by 28 publications

References 21 publications

High precision scalable power converter for accelerator magnets

High precision scalable power converter for accelerator magnets

Online Recognition of Fallen-Off Bond Wires in IGBT Modules

Power flow control in a modular converter with energy storage

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