Safety & Compliance Forum

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Abstract: This webinar is part of a four-part series about EMC with a focus on switched mode power supplies.

The first section of this presentation will be theoretical providing a basic overview of the “generation” of disturbances. This will be followed by information about several mitigation strategies that can be easily combined. The presentation will provide information about using a PFC, including which types are available. Additionally the presentation will cover filtering and its pitfalls, snubber, controlling mechanism, and other technologies such as spread spectrum. This will provide the attendees with an idea of what to be aware of when creating the layout.

The presentation will include different approaches to meet the emission requirements using switched mode power supplies. Depending on the reasons for the high emissions, some mitigations may be more efficient than others. In most situations, one single mitigation will not be sufficient and a set of remedial actions will be necessary to meet the requirements.

The presentation will conclude with a live demonstration showing the effect of common mode noise, caused by the coupling mechanism against a metallic structure and against PE. This can be very tricky, as very often the “physical” connection is not seen, but over parasitics, this coupling mechanism causes problems.

Presenter: Josefine Lametschwandtner, RECOM Power, Inc. Josefine Lametschwandtner is an EMC Engineer with RECOM Power. She has a BS in Science with an emphasis on Electronics and Technology from FH Joanneum and is working towards an MS in Information Electronics from JKU. She is currently the lead EMC Engineer with RECOM Power and has been with the company since 2012. She is responsible for EMC filter development and testing as well as customer consulting around all EMC related issues (filtering for radiated and conducted emissions, PCB layout adjustments, filtering for surge and transient immunity,

etc.).

Abstract: This webinar is part of a four-part series about EMC with a focus on switched mode power supplies. Although this part is mainly about general measures and how to design a first time pass, this knowledge is basic for understanding the third and the fourth parts, where we finally analyze switched mode power supplies and appropriate mitigations for reduced EMC problems.

The presentation will provide several approaches and design suggestions that can and should be combined. Depending on the state of design, several remedial actions are possible. So, each mitigation has its moment in the design process.

Implementing the right remedial action at the right time can save time and costs otherwise spent on retesting.

The webinar will include a short live session that will reveal that placement can influence the EMI behavior and cause trouble, although everything is done correctly the potential worst case will be shown. In case your mitigations were not enough, and you obtain a first time fail, this part of the presentation gives a short overview of what you can do to improve the EMC performance of your device.

After this presentation, you will have a good overview of the possible approaches for a good design with a focus on EMC

Presenter: Josefine Lametschwandtner, RECOM Power, Inc. Josefine Lametschwandtner is an EMC Engineer with RECOM Power. She has a BS in Science with an emphasis on Electronics and Technology from FH Joanneum and is working towards an MS in Information Electronics from JKU. She is currently the lead EMC Engineer with RECOM Power and has been with the company since 2012. She is responsible for EMC filter development and testing as well as customer consulting around all EMC related issues (filtering for radiated and conducted emissions, PCB layout adjustments, filtering for surge and transient immunity, etc.).

• Transients
• High frequency signals coupled over capacitive lines and radiated via antennas
• Various grid power phenomena as well as disruptions caused by an unstable power grid

Abstract: This webinar discusses the fundamentals of electromagnetic compliance (EMC) and will mainly focus on the coupling mechanism. It will introduce real-world parasitic behavior of components, and describe the physics phenomena responsible for the effects. Lastly, the presentation will reveal how to cope with these mechanisms and explore different techniques for noise mitigation.

Presenter: Josefine Lametschwandtner, RECOM Power, Inc. Josefine Lametschwandtner is an EMC Engineer with RECOM Power. She has a BS in Science with an emphasis on Electronics and Technology from FH Joanneum and is working towards an MS in Information Electronics from JKU. She is currently the lead EMC Engineer with RECOM Power and has been with the company since 2012. She is responsible for EMC filter development and testing as well as customer consulting around all EMC related issues (filtering for radiated and conducted emissions, PCB layout adjustments, filtering for surge and transient immunity, etc.).