Category Archives: Bus bars

New article about inductive noise problems

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3D FEA Software Solves Tough Inductive Noise Problems
by Peter Markowski, Envelope Power, Ansonia, Conn.
A previous article on 3D electromagnetic finite element analysis (FEA) software explained how a new generation
of these tools, which includes EMS from EMworks, can be used for optimization of high-frequency transformer
design (see the reference.) In this article, I would like to show how the same software can help to solve difficult
layout problems in electronics, especially power electronics.
Switched-mode power supplies are notorious for hard-to-eliminate noise problems simply because we cannot
completely avoid proximity of high-power switching circuits and sensitive controls. Good engineering practices
such as minimizing high-frequency current loops and voltage surfaces, perpendicular arrangement of potential
source-target sets and using large copper planes for shielding are naturally a must. But without any way of
quantifying problematic phenomena it is impossible to know if we are pushing our luck and if we did the best we
could within the given constraints. In the end, we have to make a choice between unnecessarily conservative
designs and risking costly, time consuming (and stressful!) fixing of prototypes.

To read more, http://www.emworks.com/ckfinder/userfiles/files/design_EnvelopePower.pdf

New generation of 3D electromagnetic

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New generation of 3D electromagnetic finite element analysis software with breakthrough simplicity facilitates magnetic component design

By Peter Markowski, Envelope Power, Ansonia, Conn.

Multiple layers of conductors in transformers can increase copper losses many times due to the proximity effects if the conductor thickness is higher than 0.3 of the skin depth. Traditionally used Dowell’s curves are accurate only in some geometrical arrangements. New generation of Finite Element Analysis software like EMS simulates high frequency phenomenon with much higher accuracy and is easy to use.

To read the full article, please visit

http://www.emworks.com/ckfinder/userfiles/files/Peter_markowski-Magnetic-component-design.pdf

 

A Spaceclaim®-embedded Multiphysics Simulation Package

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MONTREAL (September 25, 2014) – EMWorks Inc. announces the launch of its multi-physics simulation package SimClaim which is fully embedded in Ansys SpaceClaim®, formerly SpaceClaim, Engineer®.  Based on the powerful finite element method, SimClaim brings the company’s proven simulation technology to the widest base of mechanical, electrical and electromechanical designers seeking to validate and optimize their electrical, thermal, and structural designs all within the SpaceClaim environment. “We are pleased to have partnered with SpaceClaim to bring this all important multi-physics simulation technology to the SpaceClaim user community. The support we received from SpaceClaim over the last couple of years has been instrumental in accomplishing this important milestone for our company” said Dr. Ammar Kouki, Vice-President of EMWorks. He added “Ansys SpaceClaim®, is an extremely powerful 3D direct modeling software package that eliminates CAD worries for designers. Direct modeling is dramatically different from the traditional CAD software because it allows the user to directly access the model without even knowing its history. SimClaim leverages this power to enable designers and CAE specialists to carry out conceptual analysis inside SpaceClaim in record time without needing to be CAD experts. CAD experts on the other hand, will find that the SpaceClaim-SimClaim combination is hard to beat when it comes to design validation through simulation given the speed and the highly efficient workflow that this combination offers.”

Electromechanical devices in EMS?

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Electromechanical, electromagnetic, and power electronics devices can readily be studied using EMS. Electromagnetic behaviour could also be investigated with EMS. Below is sample list of devices and applications classified by areas:

Electromechanical
• Motors and generators
• Linear and rotational actuators
• Relays
• MEMS
• Magnetic recording heads
• Magnetic levitation
• Solenoids
• Loud speakers
• Electromagnetic Brakes and Clutches
• Alternators
• Magnetic bearings

Electromagnetic
• Coils
• Permanent magnets
• Sensors
• NDT, NDE
• High power
• High voltage
• PCBs
• MRI Magnets
• Induction heating
• Bushings
• Switchgear
• Cables

Power electronics
• Transformers
• Inverters
• Converters
• Bus bars
• Inductors

Electromagnetic behavior
• Insulation studies
• Electrostatic discharge
• Electromagnetic shielding
• EMI/EMC
• Electromagnetic exposure