February 9, 2023 11:00 a.m.–4:00 p.m. EST

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COMSOL Day: AC/DC Simulations

See what is possible with multiphysics simulation

Electromagnetic analysis is essential for predicting the performance of power electronics components, transformers, and electric motors. It helps engineers to develop and implement innovative ideas and find optimal configurations. By introducing electromagnetics modeling and simulation early in the design process, the cost of testing can be reduced and the behavior of devices can be understood, even in operational conditions that can only be represented virtually.

To accurately represent real-world scenarios, models may need to take into account the effects of temperature variations, mechanical stress, noise, or convective cooling — in other words, they must be multiphysics models. In electromagnetics applications, for example, multiphysics modeling capabilities are essential for finding and preventing hotspots in components, predicting the noise radiated by a transformer, or understanding if a fluid will provide sufficient cooling.

This COMSOL Day will demonstrate how electromagnetic analysis and multiphysics modeling and simulation can be used for a wide range of capacitive, inductive, and resistive devices.


11:00 a.m.

To start, we will briefly discuss the format of the day and go over the logistics for using GoToWebinar.

11:15 a.m.

The demand for and development of electric motors has increased exponentially, with hybrid and electric cars expected to make up a major portion of new car sales in the near future. Designing electric motors and drivetrains that maximize efficiency is crucial for increasing range and reducing battery capacity requirements. Modeling and simulation are integral parts of the R&D process for maximizing this efficiency, and COMSOL Multiphysics® and its AC/DC Module and Battery Design Module add-ons have become important tools for many R&D departments in the industry.

Electric traction motors also need to deliver high torque over a wide speed range while staying within temperature limits and allowing for efficient manufacturing. The most common types, synchronous permanent magnet and asynchronous motors — as well as more recently researched alternatives such as synchronous reluctance or axial flux motors — can be modeled and optimized in COMSOL Multiphysics®. The software's capability to effectively capture multiphysics effects and apply powerful optimization techniques has empowered designers to improve efficiency and decrease costs.

We welcome you to this session, where we will discuss these subjects and demonstrate how COMSOL Multiphysics® can be used in the research and development of electric motors and drivetrains.

11:45 a.m.
12:00 p.m.
Keynote Speaker
Electromagnetic Modeling and Design of Magnetic Couplings
Nirmal Paudel, Veryst Engineering

Magnetic couplings are electromagnetic devices that are used to transmit torque from a primary driver to a load without any mechanical contact. Unlike mechanical couplings, magnetic couplings are self-protected against overload (pull-out torque) and can tolerate shaft misalignments.

There are a variety of magnetic coupling topologies available, such as face-to-face, coaxial, tubular, and planar. Though these devices are different in their construction, we can use a common finite element analysis (FEA) modeling approach for their design and analysis.

A typical magnetic coupling consists of various components, including magnets, magnetic material, conducting discs or tubes, and other mechanical components for packaging. Designing a complex magnetic coupling system involving these components can be challenging. Engineers and scientists can use FEA tools to design and optimize these systems more efficiently. In this keynote presentation, we will demonstrate a workflow for designing a magnetic coupling using COMSOL Multiphysics® and its parametric sweep functionality. We will show how to design the magnets, model nonlinear magnetic materials, assign the motion using the Lorentz term, and incorporate the dynamic motion in various physics interfaces in COMSOL Multiphysics®. We will also demonstrate both static and transient simulations using models from academic literature.

12:20 p.m.
12:30 p.m.
Parallel Session

Understanding the electromagnetic behavior of coils, solenoids, and other inductive devices is of fundamental importance in electromagnetic design. COMSOL Multiphysics® features tailored functionality for the modeling and simulation of such devices. In addition, it provides unique capabilities for multiphysics modeling involving electromagnetic fields coupled with heat transfer, electromechanical forces, and other physics phenomena.

In this session, we will give an overview of using the AC/DC Module to compute the inductance, resistance, and impedance of inductors, including transformers. We will also discuss inductive heating and electromagnetic forces as well as optimizing coil shapes to achieve a desired magnetic field.

If you’re interested in learning about the features available for modeling coils, attend this session!

Particle Tracing in Electric and Magnetic Fields

When designing mass spectrometers, electron guns, and particle accelerators, particle tracing simulation is vital for accurately predicting the motion of ions or electrons in electric or magnetic fields. Depending on which kind of particles you are modeling, in the Particle Tracing Module, you can choose from a variety of built-in forces that affect their motion, including electric, magnetic, gravitational, and collisional forces. The Particle Tracing Module contains predefined expressions for the possible forces and interactions. It also enables bidirectional couplings between fields and particles for cases where particles impact the electromagnetic fields.

Attend this session to learn more about the capabilities of the Particle Tracing Module and how to best use it for your charged particle tracing simulations.

1:00 p.m.
1:15 p.m.
Parallel Session
Magnets and Magnetic Materials

Ferromagnetic materials are at the heart of motors, transformers, inductors, and many other electromagnetic devices. A challenge with simulating these applications and devices is appropriate handling of the variable and nonlinear properties of such materials, which include magnetic saturation, hysteresis, and anisotropy. The AC/DC Module add-on to COMSOL Multiphysics® enables users to define arbitrary and nonlinear expressions as a function of modeled variables directly in the user interface, which provides great flexibility when modeling and simulating magnetic materials.

In this session, we will demonstrate how the AC/DC Module can be used to model magnetic materials and phenomena, including iron loss estimation (through Steinmetz or Bertotti loss models for fundamental frequency and harmonics) and explicit hysteresis modeling.

Electric Discharge

Electrostatic discharge (ESD) and lightning can have detrimental effects on electronic components. Electric breakdown in high-voltage components needs to be managed from a safety as well as reliability perspective. Assessing the risk for electric breakdown and understanding ESD is important for the design of both low-voltage devices, such as capacitive touchscreens, and high-voltage devices, such as circuit breakers and bushings. COMSOL Multiphysics® and its add-on products provide a variety of tools for electrical breakdown detection and electric discharge modeling. The software also makes it possible to couple the other physics phenomena involved using multiphysics couplings and equation-based modeling.

Attend this session to learn more about the best modeling approaches for the various modes of electric breakdown and discharge.

1:45 p.m.
2:00 p.m.

Tech Lunches are informal sessions where you can interact with COMSOL staff and other attendees. You will be able to discuss any modeling-related topic that you like and have the opportunity to ask COMSOL technology product managers and applications engineers your questions. Join us!

2:30 p.m.
Parallel Session
High-Voltage Components

As we move toward a future with sustainable energy, the electrical grid needs to be upgraded and expanded in order to efficiently integrate wind and solar farms. This process involves the design and development of cables, long-distance high-capacity transmission lines, circuit breakers, busbars, and other components. COMSOL Multiphysics® is frequently used for the modeling and simulation of both HVDC and AC power system components. The software features a wide range of tailored functionality for modeling electromagnetic fields in high-voltage components as well as unique multiphysics capabilities to account for thermal and structural effects.

Attend this session to get an introduction to electromagnetic field modeling of high-voltage components. We will showcase the use of the AC/DC Module with modeling examples as well as industry case studies.

Electronic Components

Electronic components are found everywhere in our daily lives, from our homes and workplaces to even our clothing, and their wide range of uses and applications continues to expand. When designing and optimizing these devices, modeling and simulation can be used to assess their performance and understand how they can be integrated into larger systems.

Due to the diverse operating conditions of these devices, it's often necessary to consider thermal and structural effects during the design process. Because COMSOL Multiphysics® can account for such real-world effects, it is widely used for designing and optimizing electronic devices.

Join this session to learn how COMSOL Multiphysics® can be used to model electronic devices involving resistive, capacitive, and inductive effects. You will also learn how these effects can be connected to electrical circuits with the help of specialized features in the AC/DC Module such as lumped parameter extraction.

3:00 p.m.
3:15 p.m.

Pulsed field ablation uses time-varying electrical signals to induce temporary, or permanent, pores in cell membranes. This process, called electroporation, has many uses, including stimulating cell growth, drug delivery, and tissue ablation. Because COMSOL Multiphysics® has the ability to model coupled physics phenomena, and because it includes unique functionality for equation-based modeling, it is a popular software for the modeling and simulation of ablation and electroporation.

Due to its multiscale and multiphysics nature, this is an area where numerical modeling can assist both the device manufacturer and the clinical team. Join this session to learn about the unique modeling aspects in this field, and how COMSOL Multiphysics® can be used to address them.

3:45 p.m.
4:00 p.m.
Closing Remarks

Register for COMSOL Day: AC/DC Simulations

To register for the event, please create a new account or log into your existing account. You will need a COMSOL Access account to attend COMSOL Day: AC/DC Simulations.

For registration questions or more information contact info@comsol.com.

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COMSOL Day Details

Local Start Time:
February 9, 2023 | 11:00 a.m. EST (UTC-05:00)
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Invited Speakers

Nirmal Paudel Veryst Engineering

Dr. Nirmal Paudel is a lead engineer at Veryst Engineering. Dr. Paudel has an extensive background in computational electromagnetics research and product development, particularly in the power and energy sector. He has more than a decade of experience in modeling resistive, capacitive, and inductive devices, including devices with nonlinear materials. He has wide-ranging experience modeling electromagnetic devices such as transformers, motors, generators, magnetic devices and systems (gears, levitation systems, actuators, dampers, and sensors), eddy-current devices, inductive power transfer systems, and capacitive touch devices. He is also experienced in multiphysics modeling, including modeling Joule heating, inductive heating, heat transfer, and flow in electromagnetic devices.

Dr. Paudel has worked in both academic and industry settings. Prior to joining Veryst, Dr. Paudel was an associate professor at Tribhuvan University’s Institute of Engineering in Nepal. Dr. Paudel also worked for ABB Inc. as a principal R&D engineer, leading the R&D activities for development of outdoor products such as fuses, cutouts, sensors, and instrument transformers. Prior to that, Dr. Paudel worked for COMSOL as an applications engineer and later as a team leader, responsible for technical support, training, and developing proof-of-concept models for customer applications. Dr. Paudel has coauthored many peer-reviewed research articles in international journals and for conferences and has been a reviewer for several journals, including IEEE Transactions on Magnetics (from the Institute of Electrical and Electronics Engineers) and ACES Journal (from the Applied Computational Electromagnetics Society).