Dr. Erickson's research focuses on new approaches to control and convert electrical power with ultra-high efficiency, with application to renewable energy systems and other applications of electrical power. This research incorporates advances in magnetics technology and modeling with advances in power conversion circuitry to push the limits of achievable system efficiency. He has recently applied these results to demonstrate new building-integrated photovoltaic power systems that maximize energy harvest with complex building geometries, and also to demonstrate new power electronics architectures that substantially reduce the loss in electric vehicle drivetrains.
keywords
power electronics and control, power magnetics, electric vehicle power electronics, photovoltaic power systems, medical applications of power electronics
ECEA 5005 - Special Topics
Primary Instructor
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Fall 2021
Examines a special topic in Electrical, Computer, and Energy Engineering.
ECEA 5006 - Special Topics
Primary Instructor
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Fall 2021
Examines a special topic in Electrical, Computer and Energy Engineering.
ECEA 5700 - Power Electronics: Introduction to Power Electronics
Primary Instructor
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Fall 2019 / Spring 2020 / Summer 2020 / Fall 2020 / Spring 2021 / Summer 2021 / Fall 2021 / Spring 2022 / Summer 2022 / Fall 2022 / Spring 2023 / Summer 2023 / Fall 2023 / Spring 2024 / Summer 2024 / Fall 2024
Introduces the basic concepts of switched-mode converter circuits for controlling and converting electrical power with high efficiency. Principles of converter circuit analysis are introduced and developed for finding steady-state voltages, current, and efficiency of power converters. Assignments include a dc-dc converter simulation, inverting dc-dc converter analysis, and modeling of an electric vehicle system and a USB power regulator.
ECEA 5701 - Power Electronics: Converter Circuits
Primary Instructor
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Spring 2020 / Summer 2020 / Fall 2020 / Spring 2021 / Summer 2021 / Fall 2021 / Spring 2022 / Summer 2022 / Fall 2022 / Spring 2023 / Summer 2023 / Fall 2023 / Spring 2024 / Summer 2024 / Fall 2024
Introduces more advanced switched-mode converter concepts. Realization of power semiconductors in inverters or in converters having bidirectional power flow is explained. Power diodes, power MOSFETs, and IGBTs are explained, including their switching time origins. Equivalent circuit models are refined to include the effects of switching loss. Several well-known converter circuit topologies are explored, including those with transformer isolation.
ECEA 5702 - Power Electronics: Converter Control
Primary Instructor
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Spring 2020 / Summer 2020 / Fall 2020 / Spring 2021 / Summer 2021 / Fall 2021 / Spring 2022 / Summer 2022 / Fall 2022 / Spring 2023 / Summer 2023 / Fall 2023 / Spring 2024 / Summer 2024 / Fall 2024
This course teaches feedback system design to control a switching converter. Equivalent circuit models derived in previous courses are extended to model small-signal ac variations. These models are then solved for important converter transfer functions and regulator system. Finally, the feedback loop is modeled and designed to meet requirements such as output regulation, bandwidth and transient response, and disturbance rejection.
ECEA 5703 - Power Electronics: Magnetics Design
Primary Instructor
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Fall 2020 / Spring 2021 / Summer 2021 / Fall 2021 / Spring 2022 / Summer 2022 / Fall 2022 / Spring 2023 / Summer 2023 / Fall 2023 / Spring 2024 / Summer 2024 / Fall 2024
Covers magnetic component analysis and design, including inductors and transformers in power electronic converters. First introduced are inductor and transformer physical principles, including concepts of inductance, core material saturation, inductors airgap and energy storage, reluctance and magnetic circuit modeling, transformer-equivalent circuits, magnetizing and leakage inductance. Multi-winding transformer model details are covered, plus optimizing inductors in switched-mode power converters.
ECEA 5715 - Power Electronics Capstone Project
Primary Instructor
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Fall 2020 / Spring 2021 / Fall 2021 / Spring 2022 / Fall 2022 / Spring 2023 / Fall 2023 / Spring 2024 / Fall 2024
A design project that applies the material of courses ECEA 5700, 5701, 5702, 5703, and 5705 to design and verify a bidirectional dc-dc converter and its controller, to interface a lithium-polymer battery to a USB-C device. Three milestones demonstrate: design and steady-state operation of converter power stage, averaged modeling and design of converter controller, and closed-loop transient response and regulation.
ECEA 5716 - Open-Loop Photovoltaic Power Electronics Laboratory
Primary Instructor
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Spring 2022 / Summer 2022 / Fall 2022 / Spring 2023 / Summer 2023 / Fall 2023 / Spring 2024 / Summer 2024 / Fall 2024
Design, construct, and demonstrate an open-loop PV power electronics system in which a dc-dc switching converter interfaces a PV panel to a deep-discharge 12 V battery. The project includes testing and modeling of the PV panel, design and testing of the dc-dc converter and its magnetics, and use of a modern microcontroller to drive the power MOSFET. Recommended prerequisites: ECEA 5700, ECEA 5701, and ECEA 5703.
ECEA 5717 - Closed-Loop Photovoltaic Power Electronics Laboratory
Primary Instructor
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Spring 2022 / Summer 2022 / Fall 2022 / Spring 2023 / Summer 2023 / Fall 2023 / Spring 2024 / Summer 2024 / Fall 2024
Develop a digital controller to regulate the output voltage of the dc-dc SEPIC constructed in ECEA 5716. Modeling and measurement of the small-signal control-to-output transfer function, damping of the SEPIC internal resonance as necessary, design and implementation of a digital compensator, and demonstration of closed-loop performance. Recommended prerequisites: ECEA 5702 and ECEA 5716.
ECEA 5718 - Photovoltaic Power Electronics Battery Management Laboratory
Primary Instructor
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Spring 2022 / Summer 2022 / Fall 2022 / Spring 2023 / Summer 2023 / Fall 2023 / Spring 2024 / Summer 2024 / Fall 2024
Complete the photovoltaic power system of ECEA 5716-5718. Implement maximum power point tracking, charge taper, and float modes via digital control and current sensing circuitry. Recommended prerequisites: ECEA 5716 and ECEA 5717.
ECEN 2260 - Circuits as Systems
Primary Instructor
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Spring 2021 / Spring 2023 / Fall 2024
Continues basic circuit analysis of ECEN 2250: Laplace transform techniques, transfer functions, frequency response, Bode diagrams, resonant circuits, Fourier series expansions, and convolution. Recommended corequisite: ECEN 2270.
ECEN 4517 - Power Electronics and Photovoltaic Power Systems Laboratory
Primary Instructor
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Spring 2018 / Spring 2020 / Spring 2021
Focuses on analysis, modeling, design and testing of electrical energy processing systems in a practical laboratory setting. Studies power electronics converters for efficient utilization of available energy sources, including solar panels and utility. Experimental projects involve design, fabrication and testing of a solar power system. Same as ECEN 5517.
ECEN 4797 - Introduction to Power Electronics
Primary Instructor
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Fall 2018 / Fall 2020 / Fall 2021 / Fall 2022
An introduction to switched-mode converters. Includes steady-state converter modeling and analysis, switch realization, discontinuous conduction mode and transformer-isolated converters. Ac modeling of converters using averaged methods, small-signal transfer functions, feedback loop design and transformer design. Same as ECEN 5797.
ECEN 5009 - Special Topics
Primary Instructor
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Fall 2020 / Fall 2022
Examines a special topic in Electrical, Computer and Energy Engineering. May be repeated up to 9 total credit hours.
ECEN 5517 - Power Electronics and Photovoltaic Power Systems Laboratory
Primary Instructor
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Spring 2018 / Spring 2020 / Spring 2021
Focuses on analysis, modeling, design and testing of electrical energy processing systems in a practical laboratory setting. Studies power electronics converters for efficient utilization of available energy sources, including solar panels and utility. Experimental projects involve design, fabrication and testing of a solar power system. Same as ECEN 4517
ECEN 5527 - Power Electronics Design Laboratory
Primary Instructor
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Fall 2021 / Fall 2023 / Fall 2024
Create, build, and debug an original design of a power converter to meet given a specification, project schedule, and related requirements. Lectures provide supporting information. Compliance to the specification is shown through a formal test report and demonstration to an instructor.
ECEN 5797 - Introduction to Power Electronics
Primary Instructor
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Fall 2018 / Fall 2020 / Fall 2021 / Fall 2022
An introduction to switched-mode converters. Includes steady-state converter modeling and analysis, switch realization, discontinuous conduction mode and transformer-isolated converters. Ac modeling of converters using averaged methods, small-signal transfer functions, feedback loop design and transformer design. Same as ECEN 4797.
ECEN 5817 - Resonant and Soft-Switching Techniques in Power Electronics
Primary Instructor
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Spring 2024
Covers resonant converters and inverters, and soft switching; sinusoidal approximations in analysis of series, parallel, LCC, and other resonant dc-dc and dc-ac converters; state-plane analysis of resonant circuits; switching transitions in hand-switched and soft-switched PWM converters; zero-voltage switching techniques, including resonant, quasi resonant, zero voltage transition, and auxiliary switch circuits.
