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Science & Math5642 Engineering4200 Mathematics2293 Social Sciences2143 Data Science, Analytics & Computer Technology2067 Physics1776 Computer Science1714 Humanities1550 Business & Management1463 Systems Engineering893 Literature861 Art, Design & Architecture797 Electrical Engineering797 Biology785 Chemistry696 Economics683 Energy, Climate & Sustainability658 Communication603 Health & Medicine586 AI564 Education & Teaching541 Algorithms and Data Structures493 Mechanical Engineering458 Materials Science and Engineering455 Software Design and Engineering449 Machine Learning427 Management421 Chemical Engineering366 Energy365 Policy and Administration347 Cognitive Science345 Operations334 Pedagogy and Curriculum331 Digital Learning328 Digital Business & IT326 History307 Media Studies306 Sociology304 Biomedical Technologies295 Earth Science278 Organizations & Leadership278 Urban Studies273 Visual Arts251 Programming & Coding250 Climate Science232 Biological Engineering207 Public Health205 Philosophy196 Innovation & Entrepreneurship185 Political Science185 Systems Thinking185 Educational Technology180 Psychology180 Adaptation and Resilience171 Anthropology171 Aerospace Engineering161 Finance & Accounting159 Language159 Architecture153 Game Design149 Climate and Energy Policy143 Strategy & Innovation143 Visualization143 Networks and Security142 Data Science138 Environmental Engineering129 Pathology and Pathophysiology124 Music121 Entrepreneurship118 Linguistics108 International Development104 Supply Chain96 Civil Engineering90 Nuclear Engineering88 Startups/New Enterprises86 Imaging71 Mental Health69 Faculty Leadership67 Ocean Engineering65 Gender Studies60 User Experience58 Environmental Design51 Immunology42 Built Environment41 Manufacturing35 Product Innovation35 Health Care Management34 Performing Arts34 Geography30 Marketing28 Sustainable Business28 Education Policy26 Innovation Process26 Law24 Real Estate24 Corporate Innovation22 Ecosystems22 Business Analytics21 Art History17 AR/VR/MR/XR12 Religion11 CyberSecurity6 Blockchain4 Natural Systems4 Negotiation & Communication4 Inventions & Patents3 Environmental and Climate Justice1 Innovation Ecosystems1

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MIT

Lecture 23: Three-Phase Inverters

In this lecture, we consider the implementation of three-phase inverters and describe how pulse-width modulation may be realized for three-phase systems.

Gratis

MIT

Lecture 24: Control, Part 1

This lecture introduces basic concepts of dynamic control and modeling of DC-DC converters. The local average operator is introduced to describe the averaged behavior of a DC-DC converter through direct circuit averaging.

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MIT

Lecture 25: Control, Part 2

This lecture introduces the concept of state space averaging for modeling switching converters. The notion of linearization of nonlinear averaged models is introduced to realize control-to-output transfer functions.

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MIT

Lecture 26: Control, Part 3

This lecture provides an example of control modeling and feedback design of a DC-DC boost converter, highlighting the aspects that must be considered in a control design.

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MIT

Lecture 27: Current-Mode Control

In this lecture, we introduce current-mode control (CMC), in which we control a converter based on both inductor current and output (capacitor) voltage. Methods for generating linearized, averaged models of peak current-mode controlled converters are described, along with methods for modeling and managing the small-signal ripple instability that can occur in such converters.

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MIT

Lecture 28: EMI Filters, Part 1

Ripple and EMI filtering are important to prevent interference with other circuitry (e.g., a power supply with an improperly designed EMI filter can easily interfere with radios, televisions, etc., in the vicinity). Here we introduce basic considerations and requirements of EMI filtering.

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MIT

Lecture 29: EMI Filters, Part 2

This lecture looks at important elements of EMI filter design, including component and layout parasitics, the need for and optimization of filter damping, and the effect of the converter on filter damping.

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MIT

Lecture 30: EMI Filters, Part 3: CM + DM

This lecture expands our consideration of EMI filtering to introduce the concepts of common-mode (CM) and differential-mode (DM) signals and how filters are designed to handle CM and DM noise.

Gratis

MIT

Lecture 31: Switched-Capacitor Convertors, Part 1

Switched-capacitor converters are a class of switching power converters that use only switches and capacitors to provide energy and charge transfer from one voltage level to another. This lecture introduces the operation of switched-capacitor circuits in the slow-switching limit and fast-switching limit and describes how they can be modeled.

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MIT

Lecture 32: Switched-Capacitor Convertors, Part 2

This lecture expands upon the description of switched capacitor converters, detailing charging/discharging loss of capacitors and describing different kinds of switched capacitors and related circuits.

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MIT

Lecture 33: Soft Switching, Part 1

Soft-switching techniques try to mitigate switching loss and noise in power electronics. General methods include “zero voltage” switching (ZVS) and “zero current” switching (ZCS).

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MIT

Lecture 34: Soft Switching, Part 2

In this lecture, we look at soft switching for inverters, including introducing the resonant pole inverter (RPI), and auxiliary resonant commutated pole (ARCP) inverter as examples. Snubbing and soft switching serve to slow the transitions of voltage and/or current at the switching transitions. How does this affect filter design and EMI emissions?

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MIT

Lecture 35: Resonant Power Conversion, Part 1

Resonant converters and inverters operate using resonant circuits with high-frequency sinusoidal waveforms. To introduce this topic, this lecture reviews resonant circuits, using the series LRC circuit as an example.

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MIT

Lecture 36: Resonant Power Conversion, Part 2

This lecture introduces the basics of resonant power converters. The fundamental harmonic approximation (FHA) method for analyzing resonant converters is introduced, and the characteristics of various resonant tanks, inverters, and rectifiers are described.

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MIT

Lecture 37: Resonant Converters: Matching Networks

This lecture introduces resonant techniques for scaling voltage and current through the use of matching networks. The characteristics of matching networks are described.

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MIT

Lecture 38: Gate Drive, Level Shift, Layout

This lecture describes some practical aspects of power electronics design, including circuit layout.

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MIT

Sustainable Real Estate

The course provides a systematic framework to understand the most challenging issues in sustainability in the real estate industry. It examines economic mechanisms, technological advances, business models, building design, and investment and financing strategies available for the different market players to promote sustainability in the building sector. Prof. Siqi Zheng is the faculty director of the MIT Center for Real Estate and founder and director of the MIT Sustainable Urbanization Lab. She specializes in urban and environmental economics, with a special focus on sustainable cities and real estate. Zhengzhen Tan is a lecturer and researcher with MIT Center for Real Estate and MIT Asia Real Estate Initiative, specializing in real estate sustainability, healthy buildings, and digital technology innovation. Prof. Juan Palacios is a visiting professor from Maastricht University whose research focuses on environmental economics, sustainable real estate, and health economics.

Gratis

MIT

11.350 Lecture 2: The Economics of Green Buildings, part 1

In this video, Prof. Zheng discusses why taking sustainability into consideration in building is a good idea, and how developers can weight the costs and benefits of green building.

Gratis

MIT

11.350 Lecture 3: The Economics of Green Buildings, Part 2

In this video, Prof. Zheng discusses the importance of decarbonization in the building sector, what certification programs have been created, and how decarbonization can be achieved.

Gratis

MIT

11.350 Lecture 5: The Economics of Healthy Buildings

In this video, Prof. Palacios discusses the difference between green buildings and healthy buildings, and describes various certification schemes for buildings of each type.

Gratis

MIT

11.350 Lecture 7: From Green Buildings to Green Cities

In this video, Prof. Zheng discusses how pricing the environmental features of buildings can support decision making.

Gratis

MIT

11.350 Lecture 8: Climate Risk and Real Estate Markets

In this video, Prof. Palacios discusses the evidence for risk from different climate-change-related phenomena, and how markets respond to that evidence.

Gratis

MIT

11.350 Lecture 9: Quantifying Climate Risks’ Impacts on Real Estate Values

In this video, Profs. Palacios and Zheng discuss how risks associated with climate change have already affected (and will increasingly affect) property values.

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MIT

11.350 Lecture 10: Topical Discussions

In this video, Prof Zheng discusses how climate risks affect real estate investment and commercial and residential property insurance markets.

Gratis

ForrigeSide 17 af 28Næste

4200

Mathematics2293

Social Sciences2143

Data Science, Analytics & Computer Technology2067

Physics1776

Computer Science1714

Humanities1550

Business & Management1463

Systems Engineering893

Literature861

Art, Design & Architecture797

Electrical Engineering797

Biology785

Chemistry696

Economics683

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Er kurserne virkelig gratis?

Ja. Alle kurser i kataloget er gratis at tage. Vi viser udelukkende kurser fra udbydere der tilbyder dem uden betaling. Nogle udbydere opkræver et gebyr hvis du vil have et certifikat eller diplom. Det fremgår tydeligt på det enkelte kursus.

Får jeg et diplom eller certifikat?

Det afhænger af kurset. Vi viser et "Diplom"-mærke på kurser der tilbyder certificering. Filtrér på "Med diplom" for kun at se dem. Bemærk at nogle udbydere kræver betaling for selve certifikatet selvom kurset er gratis.

På hvilket sprog er kurserne?

De fleste kurser er på engelsk. Kataloget på freelio.dk er på dansk, men selve undervisningen foregår på udbyderens originalsprog. Typisk engelsk for MIT, Microsoft, Google og Meta.

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