Dragan Maksimović
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View article: Double-sided cooling cold plates with overhanging heat sinks and through body busbar for high-power density power electronics
Double-sided cooling cold plates with overhanging heat sinks and through body busbar for high-power density power electronics Open
A double-sided cold plate includes a manifold comprising openings extending from a first surface of the manifold through the manifold to a second surface of the manifold forming recesses within the manifold and an inlet channel and an outl…
View article: Deployment of Water-based Liquid Scintillator in the Accelerator Neutrino Neutron Interaction Experiment
Deployment of Water-based Liquid Scintillator in the Accelerator Neutrino Neutron Interaction Experiment Open
The Accelerator Neutrino Neutron Interaction Experiment (ANNIE) is a 26-ton water Cherenkov neutrino detector installed on the Booster Neutrino Beam (BNB) at Fermilab. Its main physics goals are to perform a measurement of the neutron yiel…
View article: Balancing Multiphase FCML Converters With Coupled Inductors: Modeling, Analysis, Limitations
Balancing Multiphase FCML Converters With Coupled Inductors: Modeling, Analysis, Limitations Open
This paper investigates the modeling, analysis, and design methods for passively balancing flying capacitor multilevel (FCML) converters using coupled inductors. Coupled inductors synergize with FCML converters by reducing inductor current…
View article: Deployment of Water-based Liquid Scintillator in the Accelerator Neutrino Neutron Interaction Experiment
Deployment of Water-based Liquid Scintillator in the Accelerator Neutrino Neutron Interaction Experiment Open
The Accelerator Neutrino Neutron Interaction Experiment (ANNIE) is a 26-ton water Cherenkov neutrino detector installed on the Booster Neutrino Beam (BNB) at Fermilab. Its main physics goals are to perform a measurement of the neutron yiel…
View article: Functionally graded thermal vias for inductor winding heat flow control
Functionally graded thermal vias for inductor winding heat flow control Open
Embodiments of the disclosure relate to apparatuses for enhanced thermal management of an inductor assembly using functionally-graded thermal vias for heat flow control in the windings of the inductor. In one embodiment, a PCB for an induc…
View article: Asymmetric configurable double-sided manifold micro-channel cold plates
Asymmetric configurable double-sided manifold micro-channel cold plates Open
A cold plate having a manifold includes a recess extending from a first side to a second side of the manifold, where the recess includes openings to the recess positioned lengthwise along the first side and a single opening to the recess o…
View article: GATE Center of Excellence in Innovative Drivetrains in Electric Automotive Technology Education <em>(IDEATE)</em> (Final Report)
GATE Center of Excellence in Innovative Drivetrains in Electric Automotive Technology Education <em>(IDEATE)</em> (Final Report) Open
The IDEATE project recognized that this is a critical point in history where advanced engineering solutions are required to propel the U.S. automotive industry irrevocably to the next level: the electrified drivetrain. The existing workfor…
View article: Modular scalable power conversion
Modular scalable power conversion Open
A cascaded architecture composed of interconnected blocks that are each designed to process constant power and eliminate bulk energy storage are provided. Further, local controls within each block natively achieve both block- and system-le…
View article: Model predictive control and optimization for battery charging and discharging
Model predictive control and optimization for battery charging and discharging Open
An apparatus for model predictive control (“MPC”) is disclosed. A method and system also perform the functions of the apparatus. The apparatus includes a measurement module that receives battery status information from one or more sensors …
View article: Autonomous battery control and optimization
Autonomous battery control and optimization Open
An apparatus includes a battery state module that determines a battery state of each of a plurality of battery cells forming a battery unit. A battery state includes a health of the battery cell. A battery state of a battery cell differs f…
View article: A Highly Integrated Hybrid DC–DC Converter With nH-Scale IPD Inductors
A Highly Integrated Hybrid DC–DC Converter With nH-Scale IPD Inductors Open
This article presents a new integrated step-down dc–dc hybrid converter that uses only nano-Henry scale inductors at 2–5-MHz switching frequency. Since it is derived from a Dickson-star switched capacitor (SC) converter, the proposed conve…
View article: Control Design of Series-Connected PV-Powered Grid-Forming Converters via Singular Perturbation
Control Design of Series-Connected PV-Powered Grid-Forming Converters via Singular Perturbation Open
We report modular architectures that consist of several series-connected dc-ac converters have been a focal point of recent innovations in transformerless medium-voltage applications. In this paper, we consider an architecture consisting o…
View article: A Lyapunov-Based Generalized Dc-Side Controller Design for PV-Connected Systems: Preprint
A Lyapunov-Based Generalized Dc-Side Controller Design for PV-Connected Systems: Preprint Open
The objective of this paper is to realize a universal dc-side controller for photovoltaic (PV) systems where the control is agnostic to the downstream converter configuration. To achieve this, the downstream power converter and its control…
View article: A High-Voltage High-Reliability Scalable Architecture for Electric Vehicle Power Electronics (Final Report)
A High-Voltage High-Reliability Scalable Architecture for Electric Vehicle Power Electronics (Final Report) Open
This project developed and demonstrated new composite converter technologies that lead to high power density (> 20 kW/L) at power levels of 10s of kW, 100s of kW, or possibly higher, with fundamental advances in converter efficiency and Q …
View article: 1 kV, 10-kW SiC-Based Quadruple Active Bridge DCX Stage in a DC to Three-Phase AC Module for Medium-Voltage Grid Integration
1 kV, 10-kW SiC-Based Quadruple Active Bridge DCX Stage in a DC to Three-Phase AC Module for Medium-Voltage Grid Integration Open
Interfacing low voltage dc to medium voltage three-phase ac grid is often based on series-stackable modular converter architectures. To minimize energy storage requirements, it is advantageous to employ a quadruple active bridge (QAB) stag…
View article: Levelized Cost of Energy-Oriented Modular String Inverter Design Optimization for PV Generation System Using Geometric Programming
Levelized Cost of Energy-Oriented Modular String Inverter Design Optimization for PV Generation System Using Geometric Programming Open
Levelized cost of energy (LCOE) is a commonly used metric to assess the cost-to-benefit ratio over the lifetime of an energy resource such as photovoltaics (PV). However, power electronics engineers tend to rely on metrics such as efficien…
View article: Grid-Connected Self-Synchronous Cascaded H-Bridge Inverters with Autonomous Power Sharing: Preprint
Grid-Connected Self-Synchronous Cascaded H-Bridge Inverters with Autonomous Power Sharing: Preprint Open
Cascaded inverters are widely applied in applications where elevated ac voltages are required while using semiconductor devices with lower voltage ratings. Here, we focus on structures that require localized power transfer between low-volt…
View article: Developing Engineering Formation Systems for Sustainability
Developing Engineering Formation Systems for Sustainability Open
Engineering challenges are increasingly complex, mired in characteristics Weber has described as the “social mess” – little agreement on problem definition, multiple interconnected problems, consequences difficult to imagine, let alone cha…
View article: CNNs for enhanced background discrimination in DSNB searches in\n large-scale water-Gd detectors
CNNs for enhanced background discrimination in DSNB searches in\n large-scale water-Gd detectors Open
Gadolinium-loading of large water Cherenkov detectors is a prime method for\nthe detection of the Diffuse Supernova Neutrino Background (DSNB). While the\nenhanced neutron tagging capability greatly reduces single-event backgrounds,\ncorre…
View article: A Mustard Seed Planted Years Ago Sprouts and Continues to Grow
A Mustard Seed Planted Years Ago Sprouts and Continues to Grow Open
A mustard seed planted years ago Sprouts and continues to grow.
View article: Decentralized Control of Cascaded H-Bridge Inverters for Medium-Voltage Grid Integration
Decentralized Control of Cascaded H-Bridge Inverters for Medium-Voltage Grid Integration Open
This paper introduces a fully decentralized control strategy that allows for individualized active and reactive power control of H-bridge inverters connected in series. After formulating a model of the system power flows, we outline a comm…
View article: LCOE Design Optimization Using Genetic Algorithm with Improved Component Models for Medium-Voltage Transformerless PV Inverters
LCOE Design Optimization Using Genetic Algorithm with Improved Component Models for Medium-Voltage Transformerless PV Inverters Open
For real-world installations of photovoltaic and other renewable energy resources, the critical design metric is the levelized cost of energy (LCOE); however, many power electronics design optimizations are performed with efficiency and po…
View article: Levelized-Cost-of-Electricity-Driven Design Optimization for Medium-Voltage Transformerless Photovoltaic Converters: Preprint
Levelized-Cost-of-Electricity-Driven Design Optimization for Medium-Voltage Transformerless Photovoltaic Converters: Preprint Open
Design approaches for power electronics are typically focused on efficiency and power density; however, these strategies do not guarantee cost optimality in any well-defined sense. To overcome this shortcoming, we propose a design framewor…
View article: AC Resistance Reduction Using Orthogonal Air Gaps in High Frequency Inductors
AC Resistance Reduction Using Orthogonal Air Gaps in High Frequency Inductors Open
This paper presents a relatively simple technique to reduce winding losses due to fringing fields in high-frequency inductors. In high-frequency power electronics, ac inductor winding losses are affected by skin and proximity effects, incl…
View article: Decentralized Carrier Interleaving in Cascaded Multilevel DC-AC Converters
Decentralized Carrier Interleaving in Cascaded Multilevel DC-AC Converters Open
Cascaded dc-ac converters with interleaved carriers are commonly used in applications where elevated voltages and low-distortion multilevel waveforms are needed. Example applications include modular multilevel converters and solid-state tr…
View article: Equivalent Circuit Models of Voltage-controlled Dual Active Bridge Converters
Equivalent Circuit Models of Voltage-controlled Dual Active Bridge Converters Open
In this paper, we introduce a new method of modeling voltage-controlled dual active bridge converters as equivalent circuits. What makes the proposed model unique is that the entire closed loop system converter and control are represented …
View article: A Multilevel DC to Three-Phase AC Architecture for Photovoltaic Power Plants
A Multilevel DC to Three-Phase AC Architecture for Photovoltaic Power Plants Open
This study presents a photovoltaic (PV) inverter architecture composed of stackable dc to three-phase ac converter blocks. Several such blocks, each containing a converter power stage and controls, are connected in series on their ac sides…
View article: Mitigation of Hot-Spots in Photovoltaic Systems Using Distributed Power Electronics
Mitigation of Hot-Spots in Photovoltaic Systems Using Distributed Power Electronics Open
In the presence of partial shading and other mismatch factors, bypass diodes may not offer complete elimination of excessive power dissipation due to cell reverse biasing, commonly referred to as hot-spotting in photovoltaic (PV) systems. …
View article: A Disruptive Approach to Electric Vehicle Power Electronics Final Report
A Disruptive Approach to Electric Vehicle Power Electronics Final Report Open
This project developed and demonstrated a new power electronics technology for electric vehicle drivetrains, that achieved significant improvements in power density and efficiency over standard drive cycles, relative to the commercial stat…
View article: Impact of distributed power electronics on the lifetime and reliability of PV systems
Impact of distributed power electronics on the lifetime and reliability of PV systems Open
Here, this paper quantifies the impact of distributed power electronics in photovoltaic (PV) systems in terms of end-of-life energy-capture performance and reliability. The analysis is based on simulations of PV installations over system l…