Novel cooling technology to reduce thermal impedance and thermomechanical stress for SiC application

Hu, Borong; Zeng, Zheng; Shao, Wei; Ma, Qingyu; Ren, Hai; Li, Hui; Li, Ran; Li, Zhijun

doi:10.1109/apec.2017.7931133

Cited by 6 publications

(4 citation statements)

References 17 publications

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“…Thermomechanical formulations for thin-walled structures have many applications. Examples from technology are sheet metal forming [1], gas turbine blades [2], cooling systems for circuit boards [3], overcoming transistor fatigue [4], batteries [5], and solar cells [6]. Examples from nature are lipid membranes [7] and leaves [8].…”

Section: Introductionmentioning

confidence: 99%

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A nonlinear thermomechanical formulation for anisotropic volume and surface continua

Ghaffari

Sauer

2020

Mathematics and Mechanics of Solids

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A thermomechanical, polar continuum formulation under finite strains is proposed for anisotropic materials using a multiplicative decomposition of the deformation gradient. First, the kinematics and conservation laws for three-dimensional, polar, and nonpolar continua are obtained. Next, these kinematics and conservation laws are connected to their corresponding counterparts for surface continua, based on Kirchhoff–Love assumptions. Then the shell material models are extracted from three-dimensional material models for finite-temperature problems using established connections. The weak forms are obtained for both three-dimensional nonpolar continua and Kirchhoff–Love shells. These formulations are expressed in tensorial form so that they can be used in both curvilinear and Cartesian coordinates. They can be used to model anisotropic crystals and soft biological materials.

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Section: Introductionmentioning

confidence: 99%

“…For the partitioning, either isothermal or adiabatic splits can be used. 3 The latter method can be shown to be unconditionally stable [81,82].…”

Section: Introductionmentioning

confidence: 99%

A nonlinear thermomechanical formulation for anisotropic volume and surface continua

Ghaffari

Sauer

2020

Mathematics and Mechanics of Solids

View full text Add to dashboard Cite

show abstract

“…Thermomechanical formulations for thin-walled structures have many applications. Examples from technology are sheet metal forming [1], gas turbine blades [2], cooling systems for circuit boards [3], fatigue of transistors [4], batteries [5], solar cells [6]. Examples from nature are lipid membranes [7] and leaves [8].…”

Section: Introductionmentioning

confidence: 99%

A nonlinear thermomechanical formulation for anisotropic volume and surface continua

Ghaffari¹,

Sauer²

2019

Preprint

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A thermomechanical, polar continuum formulation under finite strains is proposed for anisotropic materials using a multiplicative decomposition of the deformation gradient. First, the kinematics and conservation laws for three dimensional, polar and non-polar continua are obtained. Next, these kinematics are connected to their corresponding counterparts for surface continua based on Kirchhoff-Love kinematics. Likewise, the conservation laws for Kirchhoff-Love shells are derived from their three dimensional counterparts. From this, the weak forms are obtained for three dimensional non-polar continua and Kirchhoff-Love shells. These formulations are expressed in tensorial form so that they can be used in both curvilinear and Cartesian coordinates. They can be used to model anisotropic crystals and soft biological materials, and they can be extended to other field equations, like Maxwell's equations to model thermo-electro-magneto-mechanical materials.

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“…Some innovative designs are developed to enhance the power dissipation and reduce the thermal resistance, including optimized heat sink structure [33], [34], integrated baseplate with Pin-Fin or Power-Shower technologies [13], 3D printed heat sink [35], nano-scale thermal interface material [36], cold spray low temperature soldering [37], etc. Besides, from the viewpoint of the digital controller, active thermal management is presented to on-line regulate the power losses of power devices, by using an adaptive switching frequency or an adjustable dc-link voltage [38].…”

mentioning

confidence: 99%

Stepwise Design Methodology and Heterogeneous Integration Routine of Air-Cooled SiC Inverter for Electric Vehicle

Zeng

Zhang

Blaabjerg

et al. 2020

IEEE Trans. Power Electron.

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Carrying on SiC devices, the air-cooled inverter of the electric vehicle (EV) can eliminate the traditional complicated liquidcooling system in order to obtain a light and compact performance of the powertrain, which is considered as the trend of next-generation EV. However, the air-cooled SiC inverter lacks strategic design methodology and heterogeneous integration routine for critical components. In this paper, a stepwise design methodology is proposed for the air-cooled SiC inverter in the power module, dclink capacitor, and heat sink levels. In the power module level, an electrical-thermal-mechanical multi-physics model is proposed. The multi-dimension stress distribution principles in a six-in-one SiC power module are demonstrated. An improved power module is presented and confirmed by using the observed multi-physics design principles. In the dc-link capacitor level, ripple modeling of the inverter and capacitor are created. Considering the trade-offs among ripple voltage, ripple current, and cost, optimal strategies to determine the material and minimize the capacitance of the dc-link capacitor are proposed. In the heat sink level, thermal resistance of air-cooled heat sink is modeled. Structure and material properties of the heat sink are optimally designed by using a comprehensive electro-thermal analysis. Based on the optimal design results, the prototypes of the customized SiC power module and heterogeneously integrated air-cooled inverter are fabricated. Experimental results are presented to demonstrate the feasibility of the designed and manufactured air-cooled SiC inverter.

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Novel cooling technology to reduce thermal impedance and thermomechanical stress for SiC application

Cited by 6 publications

References 17 publications

A nonlinear thermomechanical formulation for anisotropic volume and surface continua

A nonlinear thermomechanical formulation for anisotropic volume and surface continua

A nonlinear thermomechanical formulation for anisotropic volume and surface continua

Stepwise Design Methodology and Heterogeneous Integration Routine of Air-Cooled SiC Inverter for Electric Vehicle

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